golang..558cd4e · rowtype-yoga/purescript-native

git.iko.soy/rowtype-yoga/purescript-native

115 files changed+5287−2716

unifiedsplit

.gitignore−15

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11dist

22cabal-dev

3−.cabal-sandbox

4−cabal.sandbox.config

53*.o

64*.hi

75*.chi

86*.chs.h

97*.lksh*

108.virthualenv

11−.psci_modules/

12−.test_modules/

13−bower_components/

14−node_modules

15−tmp/

16−.stack-work/

17−stack.yaml.lock

18−output

19−examples/docs/docs/

20−core-tests/full-core-docs.md

21−.psc-ide-port

22−.vscode/

23−result

.travis.ymlnew file+3

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1+language: haskell

2+notifications:

3+ email: false

CONTRIBUTING.mdnew file+14

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1+Pull requests are encouraged.

3+Please follow the following guidelines:

5+- Add at least a test to `examples/passing/` and possibly to `examples/failing`

6+- Run `cabal test`

7+- Consider adding a full test with Javascript to `examples/shelltest`

8+- Please run `hlint`.

10+If you would like to contribute, please consider the issues in the current milestone first.

11+

12+Send me (`paf31`) a message if you have any implementation questions, I'm more than happy to talk about the design, and I'm more than willing to redesign parts if necessary.

13+

14+Finally, if you have made code changes and would like to be included in the copyright notice in the cabal file, please include that change in your pull request.

ChangeLog.mddeleted−3

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1−# Changelog for pscpp

2−

3−## Unreleased changes

LICENSE+16−26

@@ -1,30 +1,20 @@

1+The MIT License (MIT)

5−Redistribution and use in source and binary forms, with or without

6−modification, are permitted provided that the following conditions are met:

5+Permission is hereby granted, free of charge, to any person obtaining a copy of

6+this software and associated documentation files (the "Software"), to deal in

7+the Software without restriction, including without limitation the rights to

8+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of

9+the Software, and to permit persons to whom the Software is furnished to do so,

10+subject to the following conditions:

711

8− * Redistributions of source code must retain the above copyright

9− notice, this list of conditions and the following disclaimer.

12+The above copyright notice and this permission notice shall be included in all

13+copies or substantial portions of the Software.

1014

11− * Redistributions in binary form must reproduce the above

12− copyright notice, this list of conditions and the following

13− disclaimer in the documentation and/or other materials provided

14− with the distribution.

15−

16− * Neither the name of Author name here nor the names of other

17− contributors may be used to endorse or promote products derived

18− from this software without specific prior written permission.

19−

20−THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

21−"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

22−LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

23−A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

24−OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

25−SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

26−LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

27−DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

28−THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

29−(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

30−OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

15+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

16+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS

17+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR

18+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER

19+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

20+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README-go.mddeleted−48

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1−

2−### psgo

3−

4−#### Performance

5−

6−* No runtime system beyond some support types and functions

7−* Uses PureScript's normal tail call optimization techniques for generated Go code

8−

9−#### Differences from PureScript:

10−

11−* Foreign imports/exports are Go instead of JavaScript – see [standard library foreign implementations](https://github.com/andyarvanitis/purescript-native-go-ffi)

12−* No Go-specific REPL

13−

14−#### Other notes:

15−

16−* The provided `Any` type is just an alias for `interface{}`

17−* PureScript types are represented in Go with:

18−

19− | PureScript | Go |

20− |------------|----|

21− |`Array` | `[]Any`|

22− |`String` | `string`|

23− |`Number` | `float64`|

24− |`Int` | `int`|

25− |`Char` | `string` (single UTF-8 entity)|

26− |`Boolean` | `bool`|

27− |Records | `map[string]Any`|

28−

29−#### Future ideas:

30−

31−* Nice facilities (modules) for concurrency/parallelism, using goroutines

32−

33−

34−#### Getting Started

35−This assumes you are running macOS (OS X) or a Unix-like system (Linux, *BSD, etc.).

36−

37−1. Choose a working directory wherever you like. Then create a `src` subdirectory under it, which will be where you will place your own PureScript source files.

38−

39−1. Initialize your project with `spago init`, and install any dependencies with `spago install` (please see their instructions if you haven't used it before).

40−

41−1. Add the `backend = "psgo"` option to your `spago.dhall` file. That way `spago` will use the psgo backend when compiling.

42−

43−1. You should now be ready to build a PureScript program:

44− * As stated above, place your source file(s) in the working directory's `src` subdirectory and execute `spago build`.

45−

46− * This will generate the Go source tree for your program and then build an executable binary. The resulting executable will be in your working directory and will be named `Main`. The generated source files will be under `output/`.

47−

48−---

README.md+695−28

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1−[![PureScript](https://raw.githubusercontent.com/purescript/purescript/master/logo.png)](http://purescript.org)

1+purescript

2+==========

3−This is a platform-native compiler backend for [PureScript](https://github.com/purescript/purescript). It attempts to generate "sane", debuggable, and portable [C++11](https://isocpp.org/wiki/faq/cpp11) (or later) or [Go](https://golang.org/) code as an intermediate language, which is then compiled to a native executable binary. This also enables easy interoperability with existing C/C++ or Go frameworks and libraries on a number of platforms.

4+[![Build Status](https://secure.travis-ci.org/paf31/purescript.png?branch=master)](http://travis-ci.org/paf31/purescript)

5−There are two utilities in the purescript-native "suite": `pscpp` and `psgo`. The source code in this branch is for `psgo`, the purescript-to-Go transpiler. For the source code of the `pscpp` purescript-to-C++ transpiler, please see the [cpp branch](https://github.com/andyarvanitis/purescript-native/tree/cpp).

6+A small strongly, statically typed compile-to-JS language with basic extensible records and type-safe blocks

7−#### Platforms

8−* Although purescript-native should work on any platform supporting PureScript and modern C++ or Go, the generated code and resulting binary executables have been tested on:

9− * macOS Mojave 10.14.5 – full test suite

10− * For C++, Xcode 10.2.1's `clang` was used

11− * For Go, `go` version 1.12.7 was used

12− * Windows 10 x64 – full test suite

13− * C++: Visual Studio 2017 and `clang`

14− * Go: `go` version 1.12.7

15− * Linux Debian 9.5 amd64 – full test suite (C++)

16− * Default versions of `clang` and `gcc`

17− * Linux Debian 10 amd64 – full test suite (Go)

18− * Default version of `go`

19− * Raspberry Pi 3 B+ Raspbian official build (ARM), default versions of `clang` and `gcc`

8+## Current Features

209

10+- Full Type Inference

11+- Higher Kinded Polymorphism

12+- Support for basic Javascript types

13+- Extensible records

14+- Type-safe blocks with for/while/assignment etc.

15+- Functions with multiple arguments

16+- Pattern matching

17+- Simple FFI

2118

22−#### Requirements for building `pscpp` and `psgo`

19+## Try It!

2320

24−* [Haskell Stack](https://docs.haskellstack.org/en/stable/README/) (if you're running macOS 10.14.5+, you can use pre-built binaries from [here](https://github.com/andyarvanitis/purescript-native/releases/))

21+Try PureScript in the browser [here](http://tryps.functorial.com/).

2522

26−#### Requirements for using PureScript + purescript-native

23+## License

2724

28−* A recent version (0.13+) of [purescript](https://github.com/purescript/purescript/releases).

25+See the `LICENSE` file

2926

30−* For `pscpp`, a C++11-capable toolchain, e.g. recent versions of clang, gcc, Microsoft Visual Studio

31− * GNU Make + `psc-package` is the default supported build tool, but you should be able to use your favorite package manager, C++ build system, tools, debuggers, etc.

32−* For `psgo`, the [Go toolchain](https://golang.org) for your system

33− * You can use your favorite PureScript package manager and build tools – but for simplicity, [`spago`](https://github.com/spacchetti/spago) is recommended.

27+## Contributing

3428

29+Contributions are always encouraged! Please see `CONTRIBUTING.md` for guidelines.

3530

36−#### For more information and a Getting Started guide, please see

37−* [`pscpp`](https://github.com/andyarvanitis/purescript-native/blob/cpp/README-cpp.md)

38−* [`psgo`](https://github.com/andyarvanitis/purescript-native/blob/golang/README-go.md)

31+## Installation

32+

33+Install the Haskell Plaform, then `cabal install`

34+

35+## Usage

36+

37+The `psc` executable takes a list of PureScript source files as arguments and by default writes out its errors or output to the console.

38+

39+The following options are supported:

40+

41+ -o --output

42+ Write the generated Javascript to the specified file

43+

44+ -e --foreign imports

45+ Write a list of foreign imports declarations to the specified file in addition to generating Javascript output

46+

47+## Motivation

48+

49+I was looking for a simple functional language which would compile to JavaScript and have the following characteristics:

50+

51+- Generate simple readable Javascript

52+- Provide the ability to compile to tight loops if necessary

53+- Reasonable type system

54+- Ideally, written in a programming language I would enjoy working in

55+- Provides a simple interface to existing Javascript code

56+

57+I didn't find exactly what I was looking for, so I wrote PureScript. It doesn't have everything right now, but it should serve as a simple core on which to develop new ideas.

58+

59+PureScript is *not* designed to be a general-purpose programming language. The primary use case is as a generator for purely-functional core libraries, with the main application code written in another language.

60+

61+PureScript can also be seen as a trade-off between a theoretically ideal language and one which generates reasonably high performance code.

62+

63+## Hello, PureScript!

64+

65+As an introductory example, here is the usual "Hello World" written in PureScript:

66+

67+```haskell

68+foreign import console :: { log :: String -> {} }

69+

70+main = \() -> console.log "Hello, World!"

71+```

72+

73+which compiles to the following Javascript:

74+

75+```javascript

76+function main() {

77+ console.log("Hello, World!");

78+}

79+```

80+

81+## Another Example

82+

83+The following code defines a `Person` data type and a function to generate a string representation for a `Person`:

84+

85+```haskell

86+data Person = Person { name :: String, age :: Number }

87+

88+foreign import numberToString :: Number -> String

89+

90+showPerson :: Person -> String

91+showPerson = \p -> case p of

92+ Person o -> o.name ++ ", aged " ++ numberToString(o.age)

93+```

94+

95+Line by line, this reads as follows:

96+

97+- `Person` is a data type with one constructor, also called `Person`

98+ - The `Person` constructor takes an object with two properties, `name` which is a `String`, and `age` which is a `Number`

99+- The `numberToString` function is written in Javascript, and converts a `Number` to its `String` representation

100+- The `showPerson` function takes a `Person` and returns a `String`

101+- `showPerson` works by case analysis on its argument `p`, first matching the constructor `Person` and then using string concatenation and object accessors to return its result.

102+

103+The generated Javascript looks like this:

104+

105+```javascript

106+var Person = function (value) {

107+ return { ctor: 'Person', value: value };

108+};

109+

110+function showPerson(p) {

111+ if (p.ctor === "Person") {

112+ return p.value.name + ", aged " + itoa(p.value.age)

113+ };

114+ throw "Failed pattern match"

115+}

116+

117+```

118+

119+## Type System

120+

121+The type system defines the following types:

122+

123+- Primitive Types

124+ - Number

125+ - String

126+ - Boolean

127+- Arrays

128+ - E.g. `[String]`, `[[Number]]`

129+- Records

130+ - E.g. `{ foo :: String, bar :: Number }`

131+- Tagged Unions

132+ - E.g. `data Foo a = Foo | Bar String`

133+- Functions

134+ - E.g. `Number -> String`

135+ - E.g. `(Number, Number) -> Number`

136+ - Functions can have zero or more arguments

137+- Polymorphic types (for top level declarations only)

138+ - E.g. `forall a. a -> a`

139+

140+## Primitive Types

141+

142+The three primitive types `String`, `Number` and `Boolean` correspond to their Javascript equivalents at runtime.

143+

144+PureScript supports the same binary and unary operations on primitive types as Javascript, with the following exceptions:

145+

146+- String concatenation is denoted `++` to differentiate it from numeric addition, `+`

147+- PureScript's `==` and `!=` correspond to Javascript's strong equality tests `===` and `!==`

148+

149+Examples:

150+

151+```haskell

152+num = 1 + 2 * 3

153+str = "Hello, " ++ "World!"

154+bool = 1 > 2 || true

155+```

156+

157+## Arrays

158+

159+PureScript arrays correspond to Javascript arrays at runtime, but all elements must have the same type.

160+

161+Array literals look like Javascript array literals: `[1, 2, 3]`

162+

163+Array elements can be read using array index notation `arr !! index`

164+

165+## Records

166+

167+PureScript records correspond to Javascript objects.

168+

169+Record literals look like Javascript object literals: `{ foo: "Foo" }`

170+

171+Properties can be read by using dot notation: `o.foo`

172+

173+## Tagged Unions

174+

175+Tagged unions consist of one or more constructors, each of which takes zero or one arguments.

176+

177+Tagged unions can only be created using their constructors, and deconstructed through pattern matching (see later).

178+

179+For example:

180+

181+```haskell

182+data Foo a = Foo | Bar String

183+

184+runFoo = \foo -> case foo of

185+Foo -> "It's a Foo"

186+Bar s -> "It's a Bar. The string is " ++ s

187+

188+runFoo Foo ++ runFoo (Bar "Test")

189+```

190+

191+In the example, Foo is a tagged union type which has two constructors. It's first constructor `Foo` takes no argument, and it's second `Bar` takes one, which must be a String.

192+

193+`runFoo` is an example of pattern matching on a tagged union type to discover its constructor, and the last line shows how `Foo`s are constructed.

194+

195+## Functions

196+

197+Functions in PureScript can have zero or more arguments in general, just like in Javascript.

198+

199+Functions are introduced by using a backslash followed by a list of argument names:

200+

201+```haskell

202+test1 = \a b -> a + b

203+```

204+

205+which would correspond to the Javascript

206+

207+```javascript

208+function test1(a) {

209+ return function (b) {

210+ return a + b;

211+ }

212+}

213+```

214+

215+Multiple argument functions can be introduced by wrapping the arguments in parentheses, and separating them with commas:

216+

217+```haskell

218+test1 = \(a, b) -> a + b

219+```

220+

221+which generates

222+

223+```javascript

224+function test1(a, b) {

225+ return a + b;

226+}

227+```

228+

229+In the case of a function with no arguments, the parentheses may be omitted, as follows:

230+

231+```haskell

232+test2 = \ -> 100

233+```

234+

235+which would correspond to the Javascript `function test2() { return 100; }`

236+

237+Multiple-argument and single-argument syntax can be mixed, as follows:

238+

239+```haskell

240+test3 = \a (b, c) d -> a + b + c + d

241+```

242+

243+which generates

244+

245+```javascript

246+function test3(a) {

247+ return function (b, c) {

248+ return function (d) {

249+ return a + b + c + d;

250+ }

251+ }

252+}

253+```

254+

255+Functions are applied by providing their arguments inside parentheses:

256+

257+```haskell

258+test1(1, 2, 3)

259+test2()

260+```

261+

262+A special case is made in the case of functions with one argument. These functions can be applied without parentheses, and function application associates to the left:

263+

264+```haskell

265+-- has type Number -> Number -> Number -> Number

266+addThree = \a b c -> a + b + c

267+

268+-- has type Number -> Number -> Number

269+addThree 1

270+

271+-- has type Number -> Number

272+addThree 1 2

273+

274+-- has type Number

275+addThree 1 2 3

276+```

277+

278+## Polymorphic Types

279+

280+Expressions defined at the top level may have polymorphic types.

281+

282+Here is an example:

283+

284+```haskell

285+identity = \x -> x

286+```

287+

288+`identity` is inferred to have (polymorphic) type `forall t0. t0 -> t0`. This means that for any type `t0`, `identity` can be given a value of type `t0` and will give back a value of the same type.

289+

290+A type annotation can also be provided:

291+

292+```haskell

293+identity :: forall a. a -> a

294+identity = \x -> x

295+```

296+

297+Functions may also be polymorphic in row types or type variables with other kinds (see "Kind System"):

298+

299+```haskell

300+addProps = \o -> o.foo + o.bar

301+```

302+

303+Here, `addProps` is inferred to have type `forall r. { foo :: Number, bar :: Number | r } -> Number`. That is, it can take any type which has properties `Foo` and `Bar`, and *any other record properties*.

304+

305+So, the following compiles:

306+

307+```haskell

308+addProps { foo: 1, bar: 2, baz: 3 }

309+```

310+

311+but the following does not:

312+

313+```haskell

314+addProps { foo: 1 }

315+```

316+

317+since the `bar` property is missing.

318+

319+Again, a type annotation can be provided if necessary.

320+

321+## Type Inference

322+

323+All types can be inferred, but annotations can optionally be provided.

324+

325+## Kind System

326+

327+There are two primitive kinds, the kind `*` of types and the kind `#` of rows. Higher kinded types are also supported. That is, a type variable can refer to not only a type or a row, but a type constructor, or row constructor etc.

328+

329+## Whitespace

330+

331+Syntax is whitespace sensitive. The general rule of thumb is that declarations which span multiple lines should be indented past the column on which they were first defined on their subsequent lines.

332+

333+That is, the following is valid:

334+

335+```haskell

336+foo = bar(x) +

337+ baz(x)

338+```

339+

340+But this is not:

341+

342+```haskell

343+foo = bar(x) +

344+baz(x)

345+```

346+

347+## Do Notation

348+

349+There is a keyword `do`, which does not have the same purpose as the `do` keyword in Haskell.

350+

351+`do` introduces a block. Blocks consist of statements, and must return a value of the same type on every branch of execution.

352+

353+The following types of statement are supported:

354+

355+- Variable introduction

356+- Variable assignment

357+- For loops

358+- For-each loops

359+- While loops

360+- If-Then-Else statements

361+

362+Here is an example of a power function defined using a block:

363+

364+```haskell

365+pow = \n p -> do

366+ var m = n

367+ for i <- 0 until p:

368+ m = m * n

369+ return m

370+```

371+

372+Blocks enable local mutation of their variables, but mutation is not allowed in general. The type system prevents mutable variables from escaping their scope.

373+

374+That is, while the example above is valid, the following does not compile:

375+

376+```haskell

377+incr = \n -> do

378+ n = n + 1

379+ return n

380+```

381+

382+The variable `n` is not mutable, and so the assignment in the first line of the `do` block is not allowed.

383+

384+This function can be rewritten as follows:

385+

386+```haskell

387+incr = \n -> do

388+ var m = n

389+ m = m + 1

390+ return m

391+```

392+

393+## For Loops

394+

395+For loops look like this:

396+

397+```haskell

398+total = do

399+ var n = 0

400+ for i <- 0 until 10:

401+ n = n + i

402+ return n

403+```

404+

405+The bounds `0` and `10` are inclusive and exclusive respectively.

406+

407+## For-Each Loops

408+

409+For each loops loop over the elements in an array using the `Object.forEach` method. A polyfill may be required for some browsers:

410+

411+```haskell

412+total = \arr -> do

413+ var n = 0

414+ foreach i in arr:

415+ n = n + i

416+ return n

417+```

418+

419+## While Loops

420+

421+The syntax of a while loop is similar to a foreach loop:

422+

423+```haskell

424+log2 = \n -> do

425+ var count = 0

426+ var m = n

427+ while m > 1:

428+ m = m / 2

429+ count = count + 1

430+ return count

431+```

432+

433+## If-Then-Else Statements

434+

435+Else branches are optional, and may contain further `if` statements, just as in Javascript:

436+

437+```haskell

438+collatz = \n -> do

439+ var count = 0

440+ var m = n

441+ while m > 1:

442+ if m % 2 == 0:

443+ m = m / 2

444+ else:

445+ m = m * 3 + 1

446+ count = count + 1

447+ return count

448+```

449+

450+## If-Then-Else Expressions

451+

452+The `if`, `then` and `else` keywords can also be used to create conditional expressions. In this case, the `else` block is always required.

453+

454+For example,

455+

456+```haskell

457+conditional = if 2 > 1 then "ok" else "oops"

458+```

459+

460+## Pattern Matching

461+

462+Pattern matching deconstructs a value to bring zero or more expressions into scope. Pattern matches are introduced with the `case` keyword.

463+

464+Pattern matches have the following general form

465+

466+```haskell

467+case value of

468+ pattern -> result

469+ -- ...

470+ pattern -> result

471+```

472+

473+The following pattern types are supported:

474+

475+- Wildcard pattern

476+- Literal patterns

477+- Variable pattern

478+- Array patterns

479+- Record patterns

480+- Named patterns

481+- Guards

482+

483+Patterns need not be exhaustive. A pattern match failed exception will be thrown at runtime if no pattern matches the input.

484+

485+## Wildcard Patterns

486+

487+The wilcard `_` matches any input and brings nothing into scope:

488+

489+```haskell

490+case x of

491+ _ -> 0

492+```

493+

494+## Literal Patterns

495+

496+Literal patterns are provided to match on primitives:

497+

498+```haskell

499+case booleanValue of

500+ true -> 0

501+ false -> 1

502+

503+case stringValue of

504+ "Foo" -> 0

505+ _ -> 1

506+

507+case numericValue of

508+ 0 -> 0

509+ _ -> 1

510+```

511+

512+## Variable Pattern

513+

514+A variable pattern matches any input and binds that input to its name:

515+

516+```haskell

517+case foo(x) of

518+ result -> bar(result)

519+```

520+

521+## Array Patterns

522+

523+Array patterns match an input which is an array, and bring its elements into scope.

524+

525+For example:

526+

527+```haskell

528+f = \arr -> case arr of

529+ [x] -> x

530+ [x, y : xs] -> x * y + f(xs)

531+ _ -> 0

532+```

533+

534+Here, the first pattern only matches arrays of length one, and brings the first element of the array into scope.

535+

536+The second pattern matches arrays with two or more elements, and brings the first and second elements into scope, along with the remainder of the array as the variable `xs`.

537+

538+## Record Patterns

539+

540+Record patterns match an input which is a record, and bring its properties into scope.

541+

542+```haskell

543+f = \o -> case o of

544+ { foo = "Foo" } -> o.bar

545+ _ -> 0

546+```

547+

548+## Nested Patterns

549+

550+The patterns above can be combined to create larger patterns.

551+

552+For example:

553+

554+```haskell

555+f = \o -> case o of

556+ { arr = [x:_], take = "car" } -> x

557+ { arr = [_,x:_], take = "cadr" } -> x

558+ _ -> 0

559+```

560+

561+## Named Patterns

562+

563+Named patterns bring additional names into scope when using nested patterns. Any pattern can be named by using the `@` symbol:

564+

565+```haskell

566+f = \arr -> case arr of

567+ a@[_,_:_] -> a

568+ a -> a

569+```

570+

571+Here, in the first pattern, any array with two or more elements will be matched and bound to the variable `a`.

572+

573+## Guards

574+

575+Guards are used to impose additional constraints inside a pattern using boolean-valued expressions, and are introduced with a pipe after the pattern:

576+

577+```haskell

578+evens = \arr -> case arr of

579+ [] -> 0

580+ [x:xs] | x % 2 == 0 -> 1 + evens xs

581+ [_:xs] -> evens xs

582+```

583+

584+## Type Synonyms

585+

586+For convenience, it is possible to declare a synonym for a type using the `type` keyword. Type synonyms can include type arguments.

587+

588+For example:

589+

590+```haskell

591+type Foo = { foo :: Number, bar Number }

592+

593+addFoo :: Foo -> Number

594+addFoo = \o -> o.foo + o.bar

595+```

596+## Record Updates

597+

598+Properties on records can be updated using the following syntax: `o { key = value, ..., key = value }`

599+

600+For example, the following function increments the `foo` property on its argument:

601+

602+```haskell

603+incr = \o -> o { foo = o.foo + 1 }

604+```

605+

606+The generated Javascript assumes the existence of a method called `Object.extend` such that `Object.extend(o, p)` takes an object `o` and generates a shallow copy of `o` including the properties of `p`. A simple JQuery implementation of this specification is

607+

608+```haskell

609+Object.prototype.extend = function(o, p) {

610+ return $.extend({}, o, p);

611+};

612+```

613+

614+## Operators

615+

616+In addition to the standard operators, user-defined infix operators can be created by enclosing names in parentheses:

617+

618+E.g. to create a synonym for string concatenation:

619+

620+```haskell

621+(<>) = \s1 s2 -> s1 ++ s2

622+

623+greeting = "Hello" <> "World!"

624+```

625+

626+Regular functions can be used as operators by enclosing their names in backticks:

627+

628+```haskell

629+foo = \x y -> x * y + y

630+

631+test = 10 `foo` 20

632+```

633+

634+Fixity declarations can associate a precedence level, which is a natural number, to a user-defined operator, and specify which way it associates:

635+

636+```haskell

637+infixl 5 <>

638+infixr 7 %%

639+```

640+

641+## Modules

642+

643+Simple modules are supported by the `module` keyword.

644+

645+Introduce a module as follows, with a list of indented declarations:

646+

647+```haskell

648+module A where

649+

650+ foo = \x -> x

651+```

652+

653+Modules may be nested:

654+

655+```haskell

656+module A where

657+

658+ foo = \x -> x

659+

660+ module B where

661+

662+ bar = \y -> y

663+```

664+

665+Names may be qualified by using a colon:

666+

667+```

668+foo = A:foo

669+bar = A:B:bar

670+```

671+

672+All the names in a module can be aliased using the `import` declaration:

673+

674+```haskell

675+import A

676+```

677+

678+You can also limit which names are going to be aliased:

679+

680+```haskell

681+import A.B (bar)

682+```

683+

684+## Foreign Function Interface

685+

686+The `foreign import` keyword declares a value which is defined in Javascript, and its type:

687+

688+```haskell

689+foreign import pow :: (Number, Number) -> Number

690+```

691+

692+To declare a new type with no constructors, use `foreign import data` and provide the kind:

693+

694+```haskell

695+foreign import data IO :: * -> *

696+

697+foreign import console :: {

698+ log :: String -> IO {}

699+}

700+```

701+

702+To alias a name of a field defined on a Javascript type to a PureScript function, use `foreign import member`. For example, to define a function `length` which accesses the `length` member of an array:

703+

704+```haskell

705+foreign import member "length" length :: forall a. [a] -> Number

706+```

39707

40708

41−---

Setup.hsdeleted−2

@@ -1,2 +0,0 @@

1−import Distribution.Simple

2−main = defaultMain

Setup.lhsnew file+6

@@ -0,0 +1,6 @@

1+#!/usr/bin/runhaskell

2+> module Main where

3+> import Distribution.Simple

4+> main :: IO ()

5+> main = defaultMain

app/Main.hsdeleted−250

@@ -1,250 +0,0 @@

1−{-# LANGUAGE OverloadedStrings #-}

2−{-# LANGUAGE RankNTypes #-}

3−{-# LANGUAGE TemplateHaskell #-}

4−

5−module Main where

6−

7−import Control.Monad (when)

8−import qualified Control.Monad.Parallel as Par

9−import Data.Aeson

10−import Data.Aeson.Types

11−import Data.Char

12−import Data.FileEmbed (embedFile)

13−import Data.List (delete, intercalate, isPrefixOf, nub, partition, (\\))

14−import Data.Maybe

15−import Data.Monoid ((<>))

16−import Data.Version

17−import Control.Monad.Supply

18−import Control.Monad.Supply.Class

19−import Text.Printf

20−

21−import System.Environment

22−import System.Directory (createDirectoryIfMissing, doesDirectoryExist, doesFileExist, getCurrentDirectory, getModificationTime)

23−import System.FilePath ((</>), joinPath, splitDirectories, takeDirectory)

24−import System.FilePath.Find

25−import System.Process

26−

27−import Data.Text (Text)

28−import qualified Data.Text as T

29−import qualified Data.Text.Encoding as T

30−import qualified Data.Text.Lazy as L

31−import qualified Data.Text.Lazy.Encoding as L

32−import qualified Data.ByteString as B

33−

34−import Development.GitRev

35−

36−import Language.PureScript.AST.Literals

37−import Language.PureScript.CoreFn

38−import Language.PureScript.CoreFn.FromJSON

39−

40−import CodeGen.IL

41−import CodeGen.IL.Common

42−import CodeGen.IL.Printer

43−

44−import Tests

45−

46−data Command = Build | Run (Maybe String)

47−

48−parseJson :: Text -> Value

49−parseJson text

50− | Just fileJson <- decode . L.encodeUtf8 $ L.fromStrict text = fileJson

51− | otherwise = error "Bad json"

52−

53−jsonToModule :: Value -> Module Ann

54−jsonToModule value =

55− case parse moduleFromJSON value of

56− Success (_, r) -> r

57− _ -> error "Failed parsing corefn. Psgo currently supports purescript <= 0.13.8"

58−

59−splitArgs :: [String] -> ([String], Maybe String, [String])

60−splitArgs args =

61− let (opts, files) = partition (isPrefixOf "--") args

62− opts' = (map . map) toLower opts

63− (moduleName, files') =

64− if null files

65− then (Nothing, files)

66− else

67− if "--run" `elem` opts' && length (files) >= 1

68− then do

69− let file0 = head files

70− files' = tail files

71− case file0 of

72− "Main.main" -> (Just "Main", files')

73− "Test.Main.main" -> (Just "Test.Main", files')

74− _ -> (Nothing, files)

75− else (Nothing, files)

76− in (opts, moduleName, files')

77−

78−main :: IO ()

79−main = do

80− args <- getArgs

81− -- let (opts, files) = partition (isPrefixOf "--") args

82− let (opts, moduleName, files) = splitArgs args

83− opts' = (map . map) toLower opts

84− if "--tests" `elem` opts'

85− then runTests

86− else do

87− if "--help" `elem` opts' || "--version" `elem` opts'

88− then do

89− when ("--help" `elem` opts') $ do

90− putStrLn help

91− when ("--version" `elem` opts') $ do

92− let branch = $(gitBranch)

93− details | branch == "golang" = "master, commit " ++ $(gitHash)

94− | otherwise = branch

95− putStrLn $ details ++ if $(gitDirty) then " (DIRTY)" else ""

96− else do

97− if null files

98− then do

99− currentDir <- getCurrentDirectory

100− processFiles opts' [currentDir]

101− else

102− processFiles opts' files

103− if "--run" `elem` opts

104− then runBuildTool $ Run moduleName

105− else when ("--no-build" `notElem` opts) $

106− runBuildTool Build

107− return ()

108− where

109− processFiles :: [String] -> [FilePath] -> IO ()

110− processFiles opts [file] = do

111− isDir <- doesDirectoryExist file

112− if isDir then do

113− files <- find always (fileName ==? corefn) file

114− if null files

115− then errorNoCorefnFiles

116− else generateFiles opts files

117− else generateFiles opts [file]

118− processFiles opts files = do

119− generateFiles opts files

120− basePath :: [FilePath] -> FilePath

121− basePath files =

122− let filepath = takeDirectory (head files) in

123− joinPath $ (init $ splitDirectories filepath)

124− generateFiles :: [String] -> [FilePath] -> IO ()

125− generateFiles opts files = do

126− let baseOutpath = basePath files

127− writeSupportFiles baseOutpath

128− Par.mapM (generateCode opts baseOutpath) files

129− return ()

130− runBuildTool :: Command -> IO ()

131− runBuildTool cmd = do

132− project <- projectEnv

133− case cmd of

134− Build -> do

135− callProcess "go" ["build", T.unpack project </> modPrefix' </> "Main"]

136− Run moduleName -> do

137− callProcess "go" ["run", T.unpack project </> modPrefix' </> fromMaybe "Main" moduleName]

138− return ()

139−

140−generateCode :: [String] -> FilePath -> FilePath -> IO ()

141−generateCode opts baseOutpath jsonFile = do

142− jsonModTime <- getModificationTime jsonFile

143− let filepath = takeDirectory jsonFile

144− dirparts = splitDirectories $ filepath

145− mname = last dirparts

146− basedir = joinPath $ init dirparts

147− mname' = T.pack mname

148− possibleFileName = basedir </> (T.unpack mname') </> implFileName mname'

149− exists <- doesFileExist possibleFileName

150− if exists

151− then do

152− modTime <- getModificationTime possibleFileName

153− when (modTime < jsonModTime) $

154− transpile opts baseOutpath jsonFile

155− else transpile opts baseOutpath jsonFile

156−

157−transpile :: [String] -> FilePath -> FilePath -> IO ()

158−transpile opts baseOutpath jsonFile = do

159− jsonText <- T.decodeUtf8 <$> B.readFile jsonFile

160− project <- projectEnv

161− let module' = jsonToModule $ parseJson jsonText

162− ((_, foreigns, asts, implHeader, implFooter), _) <- runSupplyT 5 (moduleToIL module' project)

163− let mn = moduleNameToIL' $ moduleName module'

164− implementation = prettyPrintIL asts

165− outpath = joinPath [baseOutpath, T.unpack mn]

166− implPath = outpath </> implFileName mn

167− createDirectoryIfMissing True outpath

168− putStrLn implPath

169− B.writeFile implPath $ T.encodeUtf8 (implHeader <> implementation <> implFooter)

170−

171−writeSupportFiles :: FilePath -> IO ()

172−writeSupportFiles baseOutpath = do

173− currentDir <- getCurrentDirectory

174− let outputdir = T.pack $ baseOutpath \\ currentDir

175− ffiOutpath = currentDir </> subdir

176− createDirectoryIfMissing True baseOutpath

177− createDirectoryIfMissing True ffiOutpath

178− writeModuleFile outputdir currentDir $(embedFile "support/go.mod.working")

179− writeModuleFile outputdir baseOutpath $(embedFile "support/go.mod.output")

180− writeModuleFile outputdir ffiOutpath $(embedFile "support/go.mod.ffi-loader")

181− writeLoaderFile ffiOutpath $(embedFile "support/ffi-loader.go")

182− where

183− writeModuleFile :: Text -> FilePath -> B.ByteString -> IO ()

184− writeModuleFile outputdir path modText = do

185− let goModSource = path </> "go.mod"

186− goModSourceExists <- doesFileExist goModSource

187− when (not goModSourceExists) $ do

188− project <- projectEnv

189− let project' = T.unpack project

190− outputdir' = tail $ T.unpack outputdir

191− modText' = T.replace "$PROJECT" project $ T.decodeUtf8 modText

192− replaceLoader = project' </> ffiLoader' <> "=." </> subdir

193− replaceOutput = project' </> modPrefix' <> "=." </> outputdir'

194− B.writeFile goModSource $ T.encodeUtf8 modText'

195− callProcess "go" ["mod", "edit", "-replace", replaceLoader]

196− callProcess "go" ["mod", "edit", "-replace", replaceOutput]

197− callProcess "go" ["clean", "-modcache"]

198− writeLoaderFile :: FilePath -> B.ByteString -> IO ()

199− writeLoaderFile ffiOutpath loaderText = do

200− let loaderSource = ffiOutpath </> "ffi_loader.go"

201− loaderSourceExists <- doesFileExist loaderSource

202− when (not loaderSourceExists) $ do

203− B.writeFile loaderSource loaderText

204−

205−implFileName :: Text -> FilePath

206−implFileName mn = ((\c -> if c == '.' then '_' else c) <$> T.unpack mn) <> ".go"

207−

208−projectEnv :: IO Text

209−projectEnv = do

210− T.pack . fromMaybe defaultProject <$> lookupEnv goproject

211−

212−help :: String

213−help = "Usage: psgo OPTIONS COREFN-FILES\n\

214− \ PureScript to native (via go) compiler\n\n\

215− \Available options:\n\

216− \ --help Show this help text\n\n\

217− \ --version Show the version number\n\n\

218− \ --run Run the generated go code directly, without building an\n\

219− \ executable\n\

220− \ --no-build Generate go source files, but do not build an executable\n\

221− \ --tests Run test cases (under construction)\n\n\

222− \See also:\n\

223− \ purs compile --help\n"

224−

225−corefn :: String

226−corefn = "corefn.json"

227−

228−goSrc :: String

229−goSrc = ".go"

230−

231−goproject :: String

232−goproject = "GOPROJECT"

233−

234−defaultProject :: String

235−defaultProject = "project.localhost"

236−

237−modPrefix' :: String

238−modPrefix' = T.unpack modPrefix

239−

240−ffiLoader' :: String

241−ffiLoader' = T.unpack ffiLoader

242−

243−subdir :: String

244−subdir = T.unpack modLabel

245−

246−errorNoCorefnFiles :: IO ()

247−errorNoCorefnFiles = do

248− ioError . userError $ "no compiled purescript '" <> corefn <> "' files found –\n" <>

249− " make sure to use the '--codegen corefn' option with your purs\n" <>

250− " project build tool"

default.nixdeleted−23

@@ -1,23 +0,0 @@

1−let

2− haskellNix = import (builtins.fetchTarball https://github.com/input-output-hk/haskell.nix/archive/master.tar.gz) {};

3− nixpkgsSrc = haskellNix.sources.nixpkgs-1903; # has hsc2hs-0.68.4

4−

5− hsc2hsOverlay = self: super: {

6− buildPackages = super.buildPackages // {

7− hsc2hs = super.haskellPackages.hsc2hs;

8− };

9− };

10−

11− nixpkgsArgs = haskellNix.nixpkgsArgs // {

12− overlays = haskellNix.nixpkgsArgs.overlays ++ [ hsc2hsOverlay ];

13− };

14−in

15−{ pkgs ? import nixpkgsSrc nixpkgsArgs

16−}:

17−

18−pkgs.haskell-nix.stackProject {

19− src = pkgs.haskell-nix.haskellLib.cleanGit {

20− name = "purescript-native";

21− src = ./.;

22− };

23−}

examples/.gitignorenew file+1

@@ -0,0 +1 @@

1+shelltest/tests

examples/failing/Arrays.psnew file+1

@@ -0,0 +1 @@

1+test = \arr -> arr !! (0 !! 0)

examples/failing/Import.psnew file+1

@@ -0,0 +1 @@

1+import UndefinedModule

examples/failing/KindError.psnew file+1

@@ -0,0 +1 @@

1+data KindError f a = One f | Two f a

examples/failing/PatternScope.psnew file+7

@@ -0,0 +1,7 @@

1+-- Pattern scope doesn't leak

2+foobar = \x -> do

3+ var y = case x of

4+ z | z % 2 == 0 -> 1

5+ _ -> 2

6+ return z

examples/failing/Rank2Types.psnew file+3

@@ -0,0 +1,3 @@

1+foreign import test :: (forall a. a -> a) -> Number

3+test1 = test (\n -> n + 1)

examples/failing/ReadShow.psnew file+5

@@ -0,0 +1,5 @@

1+foreign import read :: forall a. String -> a

3+foreign import show :: forall a. a -> String

5+test = \x -> show (read x)

examples/failing/TypeError.psnew file+3

@@ -0,0 +1,3 @@

1+test = do

2+ var x = 0

3+ return x ++ "A"

examples/passing/Arrays.psnew file+14

@@ -0,0 +1,14 @@

1+test1 = \arr -> arr !! 0 + arr !! 1

3+test2 = \arr -> case arr of

4+ [x, y] -> x + y

5+ [x] -> x

6+ [] -> 0

7+ [x, y : _] -> x + y

9+data Tree = One Number | Some [Tree]

10+

11+test3 = \(tree, sum) -> case tree of

12+ One n -> n

13+ Some [n1, n2 : rest] -> test3(n1, sum) * 10 + test3(n2, sum) * 5 + sum(rest)

14+

examples/passing/Assign.psnew file+5

@@ -0,0 +1,5 @@

1+sum = \n -> do

2+ var x = 0

3+ for i <- 0 until n:

4+ x = x + i

5+ return x

examples/passing/Conditional.psnew file+5

@@ -0,0 +1,5 @@

1+fns = \f -> if f true then f else \x -> x

3+bin = \x -> if x && !x then x else x

5+not = \x -> if x then false else true

examples/passing/Console.psnew file+19

@@ -0,0 +1,19 @@

1+foreign import data IO :: * -> *

3+foreign import ret :: forall a. a -> IO a

5+foreign import (>>=) :: forall a b. IO a -> (a -> IO b) -> IO b

7+(*>) = \a -> \b -> a >>= \x -> b

9+foreign import putStrLn :: String -> IO {}

10+

11+replicateM_ :: forall a. Number -> IO a -> IO {}

12+replicateM_ = \n -> \x -> do

13+ var io = ret {}

14+ for i <- 0 until n:

15+ io = x *> io

16+ return io

17+

18+main = replicateM_ 10 (putStrLn "Hello World!")

19+

examples/passing/ExternData.psnew file+13

@@ -0,0 +1,13 @@

1+foreign import data IO :: * -> *

3+foreign import fmap :: forall a b. IO a -> (a -> b) -> IO b

5+foreign import ret :: forall a. a -> IO a

7+foreign import bind :: forall a b. IO a -> (a -> IO b) -> IO b

9+foreign import showMessage :: String -> IO { }

10+

11+foreign import prompt :: IO String

12+

13+main = prompt `bind` \s -> showMessage s

examples/passing/FFI.psnew file+5

@@ -0,0 +1,5 @@

1+foreign import foo :: String -> String

3+bar :: String -> String

5+bar = \x -> foo (x ++ "bar")

examples/passing/Foreach.psnew file+5

@@ -0,0 +1,5 @@

1+sum = \ns -> do

2+ var total = 0

3+ foreach n in ns:

4+ total = total + n

5+ return total

examples/passing/Functions.psnew file+11

@@ -0,0 +1,11 @@

1+test1 = \ -> 0

3+test2 = \() -> 0

5+test3 = \a (b, c) d -> a + b + c + d

7+test4 = \(a) -> a

9+test5 = \(%%) -> 1 %% 2

10+

11+test6 = \((+++), (***)) -> 1 +++ 2 *** 3

examples/passing/Guards.psnew file+8

@@ -0,0 +1,8 @@

1+collatz = \x -> case x of

2+ y | y % 2 == 0 -> y / 2

3+ y -> y * 3 + 1

5+-- Guards have access to current scope

6+collatz2 = \x y -> case x of

7+ z | y > 0 -> z / 2

8+ z -> z * 3 + 1

examples/passing/IfThenElse.psnew file+24

@@ -0,0 +1,24 @@

1+testIf = do

2+ var x = 0

3+ if x == 0:

4+ x = x + 1

5+ return x

7+testIfElse = do

8+ var x = 0

9+ if x == 0:

10+ x = x + 1

11+ else:

12+ x = x - 1

13+ return x

14+

15+testIfElseIf = \x -> do

16+ var y = x

17+ while y > 1:

18+ if y % 3 == 0:

19+ y = y / 3

20+ else if y % 3 == 1:

21+ y = (y - 1) % 3

22+ else:

23+ y = y * 4 + 1

24+ return y

examples/passing/Import.psnew file+12

@@ -0,0 +1,12 @@

1+module Hello where

2+ id :: forall a. a -> a

3+ id = \x -> x

5+ module Nested where

6+ import Hello (id)

8+ foo = id

10+import Hello.Nested

11+

12+main = \() -> foo 42

examples/passing/List.psnew file+22

@@ -0,0 +1,22 @@

1+data List a

2+ = Nil

3+ | Cons

4+ { head :: a

5+ , tail :: List a

6+ }

8+isNull = \l -> case l of

9+ Nil -> true

10+ _ -> false

11+

12+concat = \l1 -> \l2 -> case l1 of

13+ Nil -> l2

14+ Cons x -> Cons

15+ { head: x.head

16+ , tail: concat x.tail l2

17+ }

18+

19+flatten = \xss -> case xss of

20+ Nil -> Nil

21+ Cons cons -> concat cons.head (flatten cons.tail)

22+

examples/passing/Match.psnew file+3

@@ -0,0 +1,3 @@

1+data Foo a = Foo

3+foo = \f -> case f of Foo -> "foo"

examples/passing/Maybe.psnew file+10

@@ -0,0 +1,10 @@

1+data Maybe a = Nothing | Just a

3+maybe :: forall a b. b -> (a -> b) -> Maybe a -> b

4+maybe = \b -> \f -> \m -> case m of

5+ Nothing -> b

6+ Just a -> f a

8+fmap = \m -> \f -> maybe Nothing (\a -> Just (f a)) m

10+bind = \m -> \f -> maybe Nothing f m

examples/passing/Module.psnew file+22

@@ -0,0 +1,22 @@

1+module Test where

3+ data Foo = Foo String

5+ foo :: Test:Foo -> String

6+ foo = \f -> case f of Foo s -> s ++ "foo"

8+ bar :: Foo -> String

9+ bar = foo

10+

11+ module Inner where

12+

13+ inner = "Inner"

14+

15+baz :: Test:Foo -> String

16+baz = Test:foo

17+

18+innerCopy :: String

19+innerCopy = Test:Inner:inner

20+

21+match :: Test:Foo -> String

22+match = \f -> case f of Test:Foo s -> s ++ "foo"

examples/passing/NamedPatterns.psnew file+3

@@ -0,0 +1,3 @@

1+foo = \x -> case x of

2+ y@{ foo = "Foo" } -> y

3+ y -> y

examples/passing/Nested.psnew file+3

@@ -0,0 +1,3 @@

1+data Extend r a = Extend { prev :: r a, next :: a }

3+data Matrix r a = Square (r (r a)) | Bigger (Matrix (Extend r) a)

examples/passing/ObjectUpdate.psnew file+9

@@ -0,0 +1,9 @@

1+update1 = \o -> o { foo = "Foo" }

3+update2 :: forall r. { foo :: String | r } -> { foo :: String | r }

4+update2 = \o -> o { foo = "Foo" }

6+replace = \o -> case o of

7+ { foo = "Foo" } -> o { foo = "Bar" }

8+ { foo = "Bar" } -> o { bar = "Baz" }

9+ o -> o

examples/passing/Objects.psnew file+12

@@ -0,0 +1,12 @@

1+test = \x -> x.foo + x.bar

3+append = \o -> { foo: o.foo, bar: 1 }

5+apTest = append({foo : "Foo", baz: "Baz"})

7+f = (\a -> a.b.c) { b: { c: 1, d: "Hello" }, e: "World" }

9+g = (\a -> a.f { x: 1, y: "y" }) { f: \o -> o.x + 1 }

10+

11+typed :: { foo :: Number }

12+typed = { foo: 0 }

examples/passing/Operators.psnew file+37

@@ -0,0 +1,37 @@

1+test1 = \(x, y, z) -> x * y + z(x)(y)

3+test2 = (\x -> x.foo false) { foo : \_ -> 1 }

5+test3 = (\(x, y) -> x)(1 + 2 * (1 + 2), true && (false || false))

7+k = \x -> \y -> x

9+test4 = 1 `k` 2

10+

11+infixl 5 %%

12+

13+(%%) = \x -> \y -> x * y + y

14+

15+test5 = 1 %% 2 %% 3

16+

17+test6 = ((\x -> x) `k` 2) 3

18+

19+(<>) = \s1 -> \s2 -> s1 ++ s2

20+

21+test7 = "Hello" <> "World!"

22+

23+module Ops where

24+

25+ (@@) :: forall a b. (a -> b) -> a -> b

26+ (@@) = \f x -> f x

27+

28+ foo :: String -> String

29+ foo = \s -> s

30+

31+ test8 = foo @@ "Hello World"

32+

33+ bar = \s1 s2 -> s1 ++ s2

34+

35+test9 = Ops:foo Ops:@@ "Hello World"

36+

37+test10 = "Hello" `Ops:bar` "World"

examples/passing/Patterns.psnew file+23

@@ -0,0 +1,23 @@

1+test = \x -> case x of

2+ { str = "Foo", bool = true } -> true

3+ { str = "Bar", bool = b } -> b

4+ _ -> false

6+f = \o -> case o of

7+ { foo = "Foo" } -> o.bar

8+ _ -> 0

10+g = \o -> case o of

11+ { arr = [x : xs], take = "car" } -> x

12+ { arr = [_, x : xs], take = "cadr" } -> x

13+ _ -> 0

14+

15+

16+h = \o -> case o of

17+ a@[_,_,_] -> a

18+ _ -> []

19+

20+isDesc = \o -> case o of

21+ [x, y] | x > y -> true

22+ _ -> false

23+

examples/passing/Person.psnew file+7

@@ -0,0 +1,7 @@

1+data Person = Person { name :: String, age :: Number }

3+foreign import itoa :: Number -> String

5+showPerson :: Person -> String

6+showPerson = \p -> case p of

7+ Person o -> o.name ++ ", aged " ++ itoa(o.age)

examples/passing/Rank2Types.psnew file+10

@@ -0,0 +1,10 @@

1+test1 :: (forall a. (a -> a)) -> Number

2+test1 = \f -> f 0

4+foreign import data ST :: * -> * -> *

6+foreign import runST :: forall a. (forall s. ST s a) -> a

8+foreign import exampleST :: forall s. ST s Number

10+testST = runST exampleST

examples/passing/Recursion.psnew file+4

@@ -0,0 +1,4 @@

1+fib = \n -> case n of

2+ 0 -> 1

3+ 1 -> 1

4+ n -> fib (n - 1) + fib (n - 2)

examples/passing/TypeDecl.psnew file+12

@@ -0,0 +1,12 @@

1+id :: forall a. (a) -> a

2+id = \x -> x

4+k :: String -> Number -> String

5+k = \x -> \y -> x

7+iterate :: forall a. Number -> (a -> a) -> a -> a

8+iterate = \n -> \f -> \a -> do

9+ var result = a

10+ for i <- 0 until n:

11+ result = f result

12+ return result

examples/passing/TypeSynonyms.psnew file+29

@@ -0,0 +1,29 @@

1+type Lens a b =

2+ { get :: a -> b

3+ , set :: a -> b -> a

4+ }

6+composeLenses :: forall a b c. Lens a b -> Lens b c -> Lens a c

7+composeLenses = \l1 -> \l2 ->

8+ { get: \a -> l2.get (l1.get a)

9+ , set: \a -> \c -> do

10+ var b = l1.get a

11+ var b1 = l2.set b c

12+ return l1.set a b1

13+ }

14+

15+type Pair a b = { fst :: a, snd :: b }

16+

17+fst :: forall a b. Lens (Pair a b) a

18+fst =

19+ { get: \p -> p.fst

20+ , set: \p -> \a -> { fst: a, snd: p.snd }

21+ }

22+

23+test1 :: forall a b c. Lens (Pair (Pair a b) c) a

24+test1 = composeLenses fst fst

25+

26+foreign import head :: forall a. Lens [a] a

27+

28+test2 :: forall a b c. Lens (Pair [Pair a b] c) a

29+test2 = composeLenses fst (composeLenses head fst)

examples/passing/iota.psnew file+5

@@ -0,0 +1,5 @@

1+s = \x -> \y -> \z -> x z (y z)

3+k = \x -> \y -> x

5+iota = \x -> x s k

examples/passing/s.psnew file+1

@@ -0,0 +1 @@

1+s = \x y z -> x z (y z)

examples/shelltest/Console.jsnew file+19

@@ -0,0 +1,19 @@

1+// data IO a = \ -> a

3+// ret :: forall a. a -> IO a

4+var ret = function(a) {

5+ return function() { return a; };

6+}

8+// (>>=) :: forall a b. IO a -> (a -> IO b) -> IO b

9+var $62$62$61 = function(first) {

10+ return function (f) {

11+ return function () {

12+ var a = first();

13+ return f(a)();

14+ };

15+ };

16+};

17+

18+// putStrLn :: String -> IO {}

19+var putStrLn = function(str) { return function() { console.log(str); return {}; }; };

examples/shelltest/Foreach.jsnew file+1

@@ -0,0 +1 @@

1+console.log(sum([1,2,3,4,5]));

examples/shelltest/List.jsnew file+7

@@ -0,0 +1,7 @@

1+var l1 = Cons({ head: 1, tail: Nil });

2+var l2 = Cons({ head: 2, tail: Nil });

3+var l3 = Cons({ head: l1, tail: Cons({ head: l2, tail: Nil }) });

4+var flat = flatten(l3);

5+var f1 = flat.value.head;

6+var f2 = flat.value.tail.value.head

7+console.log([f1, f2]);

examples/shelltest/Maybe.jsnew file+5

@@ -0,0 +1,5 @@

1+console.log(bind(Just("a"))(function(a) {

2+ return bind(Just("b"))(function(b) {

3+ return Just(a + b);

4+ });

5+}));

examples/shelltest/runAll.testnew file+23

@@ -0,0 +1,23 @@

1+# Maybe

2+mkdir -p tests && ../../dist/build/psc/psc ../passing/Maybe.ps -o tests/Maybe.js && cat tests/Maybe.js Maybe.js | node

3+<<<

4+>>>

5+{ ctor: 'Just', value: 'ab' }

6+>>>2

7+>>>= 0

9+# List

10+mkdir -p tests && ../../dist/build/psc/psc ../passing/List.ps -o tests/List.js && cat tests/List.js List.js | node

11+<<<

12+>>>

13+[ 1, 2 ]

14+>>>2

15+>>>= 0

16+

17+# Foreach

18+mkdir -p tests && ../../dist/build/psc/psc ../passing/Foreach.ps -o tests/Foreach.js && cat tests/Foreach.js Foreach.js | node

19+<<<

20+>>>

21+15

22+>>>2

23+>>>= 0

examples/shelltest/runMain.jsnew file+1

@@ -0,0 +1 @@

1+main();

libraries/.gitignorenew file+1

@@ -0,0 +1 @@

1+*/all.js

libraries/jquery/Makefilenew file+4

@@ -0,0 +1,4 @@

1+all:

2+ ../../dist/build/psc/psc jquery.ps example.ps -o all.js

3+ cat jquery.js >> all.js

4+ echo "main()" >> all.js

libraries/jquery/example.psnew file+5

@@ -0,0 +1,5 @@

1+main = do

2+ var div = create "<div>"

3+ div = div `appendText` "Hello World!" `css` { color: "#FF0000" }

4+ div = div `appendTo` select "body"

5+ return { }

libraries/jquery/jquery.jsnew file+7

@@ -0,0 +1,7 @@

1+function select(s) { return $(s); }

2+function create(s) { return $(s); }

3+function attr(j, a) { return j.attr(o); }

4+function css(j, a) { return j.css(o); }

5+function append(j1, j2) { return j1.append(j2); }

6+function appendTo(j1, j2) { return j1.appendTo(j2); }

7+function appendText(j1, s) { return j1.append(s); }

libraries/jquery/jquery.psnew file+23

@@ -0,0 +1,23 @@

1+-- The jQuery wrapper type

2+foreign import data JQuery :: *

4+-- Wrapper function for jQuery selection $('..')

5+foreign import select :: String -> JQuery

7+-- Wrapper function for jQuery creation e.g. $('<div>')

8+foreign import create :: String -> JQuery

10+-- .attr({ ... })

11+foreign import attr :: forall attr. JQuery -> { | attr } -> JQuery

12+

13+-- .css({ ... })

14+foreign import css :: forall css. JQuery -> { | css } -> JQuery

15+

16+-- .append(...)

17+foreign import append :: JQuery -> JQuery -> JQuery

18+

19+-- .appendTo(...)

20+foreign import appendTo :: JQuery -> JQuery -> JQuery

21+

22+-- .append(...)

23+foreign import appendText :: JQuery -> String -> JQuery

libraries/prelude/Makefilenew file+3

@@ -0,0 +1,3 @@

1+all:

2+ ../../dist/build/psc/psc prelude.ps -o all.js

3+ cat prelude.js >> all.js

libraries/prelude/prelude.jsnew file+65

@@ -0,0 +1,65 @@

1+// Arrays

3+function indexOf(l) { return function (e) { return l.indexOf(e); }; }

4+function lastIndexOf(l) { return function (e) { return l.lastIndexOf(e); }; }

5+function concat(l1) { return function (l2) { return l1.concat(l2); }; }

6+function join(l) { return l.join(); }

7+function joinWith(l) { return function (s) { return l.join(s); }; }

8+function push(l) { return function (e) { var l1 = l.slice(); l1.push(e); return l1; }; }

9+function reverse(l) { var l1 = l.slice(); l1.reverse(); return l1; }

10+function shift(l) { var l1 = l.slice(); l1.shift(); return l1; }

11+function slice(s) { return function(e) { return function (l) { return l.slice(s, e); }; }; }

12+function sort(l) { var l1 = l.slice(); l.sort(); return l1; }

13+function splice(s) { return function(e) { return function(l1) { return function(l2) { return l2.splice(s, e, l1); }; }; }; }

14+

15+function charAt(i) { return function(s) { return s.charAt(i); }; }

16+function indexOfS(s1) { return function(s2) { return s2.indexOf(s2); }; }

17+function lastIndexOfS(s1) { return function(s2) { return s2.lastIndexOf(s2); }; }

18+function localeCompare(s1) { return function(s2) { return s1.localeCompare(s2); }; }

19+function replace(s1) { return function(s2) { return function(s3) { return s3.replace(s1, s2) }; }; }

20+function sliceS(st) { return function(e) { return function(s) { return s.slice(st, e); }; }; }

21+function split(sep) { return function(s) { return s.split(s); }; }

22+function substr(n1) { return function(n2) { return function(s) { return s.substr(n1, n2); }; }; }

23+function substring(n1) { return function(n2) { return function(s) { return s.substring(n1, n2); }; }; }

24+function toLower(s) { return s.toLower(); }

25+function toUpper(s) { return s.toUpper(); }

26+function trim(s) { return s.trim(); }

27+

28+function regex(s1) { return function(s2) { return new Regex(s1, s2); }; };

29+function test(r) { return function (s) { return r.test(s); }; };

30+function match(r) { return function (s) { return s.match(r); }; };

31+function replaceR(r) { return function(s1) { return function(s2) { return s2.replace(r, s1) }; }; }

32+function search(r) { return function (s) { return s.search(r); }; };

33+

34+var nan = NaN;

35+var infinity = Infinity;

36+function toExponential(n) { return n.toExponential(); }

37+function toFixed(d) { return function(n) { return n.toFixed(d); }; }

38+function toPrecision(d) { return function(n) { return n.toPrecision(d); }; }

39+function numberToString(n) { return n.toString(); }

40+

41+var math = Math;

42+

43+function map(f) {

44+ return function(xs) {

45+ var ys = [];

46+ for (var i = 0; i < xs.length; i++) {

47+ ys[i] = f(xs[i]);

48+ }

49+ return ys;

50+ };

51+}

52+

53+function filter(xs) {

54+ return function (p) {

55+ var ys = [];

56+ var j = 0;

57+ for (var i = 0; i < xs.length; i++) {

58+ var x = xs[i];

59+ if (p(x)) {

60+ ys[j++] = x;

61+ }

62+ }

63+ return ys;

64+ };

65+}

libraries/prelude/prelude.psnew file+261

@@ -0,0 +1,261 @@

1+id :: forall a. a -> a

2+id = \x -> x

4+flip :: forall a b c. (a -> b -> c) -> b -> a -> c

5+flip = \f -> \b -> \a -> f a b

7+konst :: forall a b. a -> b -> a

8+konst = \a -> \b -> a

10+(|>) :: forall a b c. (a -> b) -> (b -> c) -> a -> c

11+(|>) = \f -> \g -> \a -> g (f a)

12+

13+(<|) :: forall a b c. (b -> c) -> (a -> b) -> a -> c

14+(<|) = flip (|>)

15+

16+-- Maybe

17+

18+data Maybe a = Nothing | Just a

19+

20+maybe :: forall a b. b -> (a -> b) -> Maybe a -> b

21+maybe = \b -> \f -> \m -> case m of

22+ Nothing -> b

23+ Just a -> f a

24+

25+fromMaybe :: forall a. a -> Maybe a -> a

26+fromMaybe = \a -> maybe a id

27+

28+bindMaybe :: forall a b. Maybe a -> (a -> Maybe b) -> Maybe b

29+bindMaybe = \m -> \f -> maybe Nothing f m

30+

31+-- Either

32+

33+data Either a b = Left a | Right b

34+

35+either :: forall a b c. (a -> c) -> (b -> c) -> Either a b -> c

36+either = \f -> \g -> \e -> case e of

37+ Left a -> f a

38+ Right b -> g b

39+

40+bindEither :: forall e a b. Either e a -> (a -> Either e b) -> Either e b

41+bindEither = either (\e -> \_ -> Left e) (\a -> \f -> f a)

42+

43+-- Arrays

44+

45+head :: forall a. [a] -> a

46+head = \xs -> case xs of

47+ [x:_] -> x

48+

49+headSafe :: forall a. [a] -> Maybe a

50+headSafe = \xs -> case xs of

51+ [x:_] -> Just x

52+ _ -> Nothing

53+

54+tail :: forall a. [a] -> [a]

55+tail = \xs -> case xs of

56+ [_:xs] -> xs

57+

58+tailSafe :: forall a. [a] -> Maybe [a]

59+tailSafe = \xs -> case xs of

60+ [_:xs] -> Just xs

61+ _ -> Nothing

62+

63+foreign import map :: forall a b. (a -> b) -> [a] -> [b]

64+

65+foldr :: forall a b. (a -> b -> a) -> a -> [b] -> a

66+foldr = \f -> \a -> \bs -> case bs of

67+ [b:bs] -> f (foldr f a bs) b

68+ [] -> a

69+

70+foldl :: forall a b. (a -> b -> b) -> b -> [a] -> b

71+foldl = \f -> \b -> \as -> do

72+ var result = b

73+ foreach a in as:

74+ result = f a result

75+ return result

76+

77+foreign import member "length" length :: forall a. [a] -> Number

78+

79+foreign import indexOf :: forall a. [a] -> a -> Number

80+

81+foreign import lastIndexOf :: forall a. [a] -> a -> Number

82+

83+foreign import concat :: forall a. [a] -> [a] -> [a]

84+

85+foreign import join :: [String] -> String

86+

87+foreign import joinWith :: [String] -> String -> String

88+

89+foreign import push :: forall a. [a] -> a -> [a]

90+

91+foreign import reverse :: forall a. [a] -> [a]

92+

93+foreign import shift :: forall a. [a] -> [a]

94+

95+foreign import slice :: forall a. Number -> Number -> [a] -> [a]

96+

97+foreign import sort :: forall a. [a] -> [a]

98+

99+foreign import splice :: forall a. Number -> Number -> [a] -> [a] -> [a]

100+

101+cons :: forall a. a -> [a] -> [a]

102+cons = \a -> concat([a])

103+

104+concatMap :: forall a b. [a] -> (a -> [b]) -> [b]

105+concatMap = \as -> \f -> do

106+ var result = []

107+ foreach a in as:

108+ result = result `concat` f a

109+ return result

110+

111+foreign import filter :: forall a. [a] -> (a -> Boolean) -> [a]

112+

113+empty :: forall a. [a] -> Boolean

114+empty = \as -> case as of

115+ [] -> true

116+ _ -> false

117+

118+range :: Number -> Number -> [Number]

119+range = \lo -> \hi -> do

120+ var ns = []

121+ for n <- lo until hi:

122+ ns = push ns n

123+ return ns

124+

125+zipWith :: forall a b c. (a -> b -> c) -> [a] -> [b] -> [c]

126+zipWith = \f -> \as -> \bs -> case { as: as, bs: bs } of

127+ { as = [a:as1], bs = [b:bs1] } -> cons (f a b) (zipWith f as1 bs1)

128+ _ -> []

129+

130+any :: forall a. (a -> Boolean) -> [a] -> Boolean

131+any = \p -> \as -> do

132+ for i <- 0 until length as:

133+ if p (as !! i):

134+ return true

135+ return false

136+

137+all :: forall a. (a -> Boolean) -> [a] -> Boolean

138+all = \p -> \as -> do

139+ for i <- 0 until length as:

140+ if !(p (as !! i)):

141+ return false

142+ return true

143+

144+-- Pairs

145+

146+type Tuple a b = { fst :: a, snd :: b }

147+

148+curry :: forall a b c. (Tuple a b -> c) -> a -> b -> c

149+curry = \f -> \a -> \b -> f { fst: a, snd: b }

150+

151+uncurry :: forall a b c. (a -> b -> c) -> Tuple a b -> c

152+uncurry = \f -> \t -> f t.fst t.snd

153+

154+tuple :: forall a b. a -> b -> Tuple a b

155+tuple = curry id

156+

157+zip :: forall a b. [a] -> [b] -> [Tuple a b]

158+zip = zipWith tuple

159+

160+unzip :: forall a b. [Tuple a b] -> Tuple [a] [b]

161+unzip = \ts -> case ts of

162+ [t:ts1] -> case unzip ts1 of

163+ { fst = as, snd = bs } -> tuple (cons t.fst as) (cons t.snd bs)

164+ [] -> tuple [] []

165+

166+-- Strings

167+

168+foreign import member "length" lengthS :: String -> Number

169+

170+foreign import charAt :: Number -> String -> String

171+

172+foreign import indexOfS :: String -> String -> Number

173+

174+foreign import lastIndexOfS :: String -> String -> Number

175+

176+foreign import localeCompare :: String -> String -> Number

177+

178+foreign import replace :: String -> String -> String -> String

179+

180+foreign import sliceS :: Number -> Number -> String -> String

181+

182+foreign import split :: String -> String -> [String]

183+

184+foreign import substr :: Number -> Number -> String -> String

185+

186+foreign import substring :: Number -> Number -> String -> String

187+

188+foreign import toLower :: String -> String

189+

190+foreign import toUpper :: String -> String

191+

192+foreign import trim :: String -> String

193+

194+-- Regex

195+

196+foreign import data Regex :: *

197+

198+foreign import regex :: String -> String -> Regex

199+

200+foreign import test :: Regex -> String -> Boolean

201+

202+foreign import match :: Regex -> String -> [String]

203+

204+foreign import replaceR :: Regex -> String -> String -> String

205+

206+foreign import search :: Regex -> String -> Number

207+

208+-- Globals

209+

210+foreign import nan :: Number

211+

212+foreign import infinity :: Number

213+

214+foreign import toExponential :: Number -> String

215+

216+foreign import toFixed :: Number -> Number -> String

217+

218+foreign import toPrecision :: Number -> Number -> String

219+

220+foreign import numberToString :: Number -> String

221+

222+foreign import isNaN :: Number -> Boolean

223+

224+foreign import isFinite :: Number -> Boolean

225+

226+foreign import parseFloat :: String -> Number

227+

228+foreign import parseInt :: String -> Number

229+

230+foreign import encodeURIComponent :: String -> String

231+

232+foreign import decodeURIComponent :: String -> String

233+

234+foreign import encodeURI :: String -> String

235+

236+foreign import decodeURI :: String -> String

237+

238+-- Math

239+

240+type Math =

241+ { abs :: Number -> Number

242+ , acos :: Number -> Number

243+ , asin :: Number -> Number

244+ , atan :: Number -> Number

245+ , atan2 :: (Number, Number) -> Number

246+ , aceil :: Number -> Number

247+ , cos :: Number -> Number

248+ , exp :: Number -> Number

249+ , floor :: Number -> Number

250+ , log :: Number -> Number

251+ , max :: (Number, Number) -> Number

252+ , pow :: (Number, Number) -> Number

253+ , random :: () -> Number

254+ , round :: Number -> Number

255+ , sin :: Number -> Number

256+ , sqrt :: Number -> Number

257+ , tan :: Number -> Number

258+ }

259+

260+foreign import math :: Math

261+

package.yamldeleted−86

@@ -1,86 +0,0 @@

1−name: psgo

2−version: 0.1.0.0

3−github: "andyarvanitis/purescript-native"

4−license: BSD3

5−author: "Andy Arvanitis"

6−maintainer: "example@example.com"

7−copyright: "2018 Andy Arvanitis"

8−

9−extra-source-files:

10−- README.md

11−- ChangeLog.md

12−- stack.yaml

13−- support/*

14−

15−# Metadata used when publishing your package

16−# synopsis: Short description of your package

17−# category: Web

18−

19−# To avoid duplicated efforts in documentation and dealing with the

20−# complications of embedding Haddock markup inside cabal files, it is

21−# common to point users to the README.md file.

22−description: Please see the README on Github at <https://github.com/andyarvanitis/purescript-native#readme>

23−

24−dependencies:

25−- base >= 4.7 && < 5

26−- bytestring >= 0.10.8.2 && < 0.11

27−- purescript

28−- base-compat >=0.6.0

29−- protolude >=0.1.6

30−- text

31−- containers

32−- filepath

33−- monad-parallel >= 0.7.2.2 && <0.8

34−- pattern-arrows >=0.0.2 && <0.1

35−- safe >=0.3.9 && <0.4

36−- transformers >=0.3.0 && <0.6

37−- mtl >=2.1.0 && <2.3.0

38−- aeson >=1.0 && <1.5

39−- directory

40−- process

41−- file-embed

42−- filemanip

43−- gitrev

44−

45−library:

46− source-dirs: src

47− default-extensions:

48− - ConstraintKinds

49− - DataKinds

50− - DeriveFunctor

51− - EmptyDataDecls

52− - FlexibleContexts

53− - KindSignatures

54− - LambdaCase

55− - MultiParamTypeClasses

56− - NoImplicitPrelude

57− - PatternGuards

58− - PatternSynonyms

59− - RankNTypes

60− - RecordWildCards

61− - OverloadedStrings

62− - ScopedTypeVariables

63− - TupleSections

64− - ViewPatterns

65−

66−executables:

67− psgo:

68− main: Main.hs

69− source-dirs: app

70− ghc-options:

71− - -threaded

72− - -rtsopts

73− - -with-rtsopts=-N

74− dependencies:

75− - psgo

76−

77−tests:

78− psgo-test:

79− main: Spec.hs

80− source-dirs: test

81− ghc-options:

82− - -threaded

83− - -rtsopts

84− - -with-rtsopts=-N

85− dependencies:

86− - psgo

psgo.cabaldeleted−145

@@ -1,145 +0,0 @@

1−cabal-version: 1.12

2−

3−-- This file has been generated from package.yaml by hpack version 0.35.0.

4−--

5−-- see: https://github.com/sol/hpack

6−

7−name: psgo

8−version: 0.1.0.0

9−description: Please see the README on Github at <https://github.com/andyarvanitis/purescript-native#readme>

10−homepage: https://github.com/andyarvanitis/purescript-native#readme

11−bug-reports: https://github.com/andyarvanitis/purescript-native/issues

12−author: Andy Arvanitis

13−maintainer: example@example.com

14−copyright: 2018 Andy Arvanitis

15−license: BSD3

16−license-file: LICENSE

17−build-type: Simple

18−extra-source-files:

19− README.md

20− ChangeLog.md

21− stack.yaml

22− support/ffi-loader.go

23− support/go.mod.ffi-loader

24− support/go.mod.output

25− support/go.mod.working

26−

27−source-repository head

28− type: git

29− location: https://github.com/andyarvanitis/purescript-native

30−

31−library

32− exposed-modules:

33− CodeGen.IL

34− CodeGen.IL.Common

35− CodeGen.IL.Optimizer

36− CodeGen.IL.Optimizer.Common

37− CodeGen.IL.Optimizer.Inliner

38− CodeGen.IL.Optimizer.MagicDo

39− CodeGen.IL.Optimizer.TCO

40− CodeGen.IL.Printer

41− Tests

42− other-modules:

43− Paths_psgo

44− hs-source-dirs:

45− src

46− default-extensions:

47− ConstraintKinds

48− DataKinds

49− DeriveFunctor

50− EmptyDataDecls

51− FlexibleContexts

52− KindSignatures

53− LambdaCase

54− MultiParamTypeClasses

55− NoImplicitPrelude

56− PatternGuards

57− PatternSynonyms

58− RankNTypes

59− RecordWildCards

60− OverloadedStrings

61− ScopedTypeVariables

62− TupleSections

63− ViewPatterns

64− build-depends:

65− aeson >=1.0 && <1.5

66− , base >=4.7 && <5

67− , base-compat >=0.6.0

68− , bytestring >=0.10.8.2 && <0.11

69− , containers

70− , directory

71− , file-embed

72− , filemanip

73− , filepath

74− , gitrev

75− , monad-parallel >=0.7.2.2 && <0.8

76− , mtl >=2.1.0 && <2.3.0

77− , pattern-arrows >=0.0.2 && <0.1

78− , process

79− , protolude >=0.1.6

80− , purescript

81− , safe >=0.3.9 && <0.4

82− , text

83− , transformers >=0.3.0 && <0.6

84− default-language: Haskell2010

85−

86−executable psgo

87− main-is: Main.hs

88− other-modules:

89− Paths_psgo

90− hs-source-dirs:

91− app

92− ghc-options: -threaded -rtsopts -with-rtsopts=-N

93− build-depends:

94− aeson >=1.0 && <1.5

95− , base >=4.7 && <5

96− , base-compat >=0.6.0

97− , bytestring >=0.10.8.2 && <0.11

98− , containers

99− , directory

100− , file-embed

101− , filemanip

102− , filepath

103− , gitrev

104− , monad-parallel >=0.7.2.2 && <0.8

105− , mtl >=2.1.0 && <2.3.0

106− , pattern-arrows >=0.0.2 && <0.1

107− , process

108− , protolude >=0.1.6

109− , psgo

110− , purescript

111− , safe >=0.3.9 && <0.4

112− , text

113− , transformers >=0.3.0 && <0.6

114− default-language: Haskell2010

115−

116−test-suite psgo-test

117− type: exitcode-stdio-1.0

118− main-is: Spec.hs

119− other-modules:

120− Paths_psgo

121− hs-source-dirs:

122− test

123− ghc-options: -threaded -rtsopts -with-rtsopts=-N

124− build-depends:

125− aeson >=1.0 && <1.5

126− , base >=4.7 && <5

127− , base-compat >=0.6.0

128− , bytestring >=0.10.8.2 && <0.11

129− , containers

130− , directory

131− , file-embed

132− , filemanip

133− , filepath

134− , gitrev

135− , monad-parallel >=0.7.2.2 && <0.8

136− , mtl >=2.1.0 && <2.3.0

137− , pattern-arrows >=0.0.2 && <0.1

138− , process

139− , protolude >=0.1.6

140− , psgo

141− , purescript

142− , safe >=0.3.9 && <0.4

143− , text

144− , transformers >=0.3.0 && <0.6

145− default-language: Haskell2010

purescript.cabalnew file+60

@@ -0,0 +1,60 @@

1+name: purescript

2+version: 0.1.10

3+cabal-version: >=1.8

4+build-type: Simple

5+license: MIT

6+license-file: LICENSE

7+copyright: (c) Phil Freeman 2013

8+maintainer: Phil Freeman <paf31@cantab.net>

9+stability: experimental

10+synopsis: PureScript Programming Language Compiler

11+description: A small compile-to-JS language with extensible records and type-safe blocks

12+category: Language

13+author: Phil Freeman <paf31@cantab.net>

14+data-dir: ""

15+

16+library

17+ build-depends: base >=4 && <5, syb -any, cmdtheline -any,

18+ containers -any, mtl -any, transformers -any, parsec -any,

19+ utf8-string -any

20+ exposed-modules: Data.Generics.Extras Language.PureScript.Operators

21+ Language.PureScript.Optimize Language.PureScript.Pretty.JS

22+ Language.PureScript.CodeGen.JS.AST Main Language.PureScript

23+ Language.PureScript.Declarations Language.PureScript.Names

24+ Language.PureScript.Types Language.PureScript.Values

25+ Language.PureScript.Kinds Language.PureScript.Pretty

26+ Language.PureScript.Pretty.Common Language.PureScript.Pretty.Values

27+ Language.PureScript.Pretty.Types Language.PureScript.Pretty.Kinds

28+ Language.PureScript.CodeGen Language.PureScript.CodeGen.Externs

29+ Language.PureScript.CodeGen.JS Language.PureScript.CodeGen.Monad

30+ Language.PureScript.Parser Language.PureScript.Parser.Common

31+ Language.PureScript.Parser.Declarations

32+ Language.PureScript.Parser.Types Language.PureScript.Parser.Values

33+ Language.PureScript.Parser.State Language.PureScript.Parser.Kinds

34+ Language.PureScript.TypeChecker

35+ Language.PureScript.TypeChecker.Kinds

36+ Language.PureScript.TypeChecker.Monad

37+ Language.PureScript.TypeChecker.Types

38+ Language.PureScript.TypeChecker.Synonyms

39+ Language.PureScript.Unknown

40+ exposed: True

41+ buildable: True

42+ hs-source-dirs: src

43+

44+executable psc

45+ build-depends: base >=4 && <5, cmdtheline -any, containers -any,

46+ mtl -any, transformers -any, parsec -any, utf8-string -any,

47+ syb -any

48+ main-is: Main.hs

49+ buildable: True

50+ hs-source-dirs: src

51+ other-modules:

52+

53+test-suite tests

54+ build-depends: base >=4 && <5, syb -any, directory -any,

55+ filepath -any, containers -any, mtl -any, transformers -any,

56+ parsec -any, utf8-string -any, purescript -any

57+ type: exitcode-stdio-1.0

58+ main-is: Main.hs

59+ buildable: True

60+ hs-source-dirs: tests

src/CodeGen/IL.hsdeleted−321

@@ -1,321 +0,0 @@

1−-- | This module generates code in the core imperative representation from

2−-- elaborated PureScript code.

3−module CodeGen.IL

4− ( module AST

5− , module Common

6− , moduleToIL

7− ) where

8−

9−import Prelude.Compat

10−import Protolude (ordNub)

11−

12−import Control.Arrow ((&&&))

13−import Control.Monad (forM, liftM, replicateM, void)

14−import Control.Monad.Supply.Class

15−

16−import Data.List ((\\), delete, intersect, nub)

17−import qualified Data.Foldable as F

18−import qualified Data.Map as M

19−import Data.Maybe (fromMaybe, isNothing, mapMaybe)

20−import Data.Monoid ((<>))

21−import Data.String (fromString)

22−import Data.Text (Text)

23−import qualified Data.Text as T

24−

25−import Language.PureScript.AST.SourcePos

26−import Language.PureScript.CoreImp.AST (AST)

27−import qualified Language.PureScript.CoreImp.AST as AST

28−import Language.PureScript.CoreFn

29−import Language.PureScript.Crash

30−import Language.PureScript.Names

31−import Language.PureScript.Options

32−import Language.PureScript.PSString (PSString, mkString)

33−import Language.PureScript.Traversals (sndM)

34−import qualified Language.PureScript.Constants as C

35−

36−import System.FilePath.Posix ((</>))

37−

38−import CodeGen.IL.Common as Common

39−import CodeGen.IL.Optimizer

40−import CodeGen.IL.Printer

41−

42−data DeclType = ModuleDecl | LetDecl | RecLetDecl deriving (Eq)

43−

44−-- | Generate code in the simplified intermediate representation for all declarations in a

45−-- module.

46−moduleToIL

47− :: forall m

48− -- . (Monad m, MonadReader Options m, MonadSupply m, MonadError MultipleErrors m)

49− . (Monad m, MonadSupply m)

50− => Module Ann

51− -> Text

52− -> m (Text, [Text], [AST], Text, Text)

53−moduleToIL (Module _ coms mn _ imps _ foreigns decls) project =

54− do

55− ilDecls <- mapM (bindToIL ModuleDecl) decls

56− optimized <- traverse (traverse (optimize modName')) ilDecls

57− let optimized' = concat optimized

58− values = annotValue <$> optimized'

59− foreigns' = moduleIdentToIL <$> foreigns

60− interface = interfaceSource modName values foreigns

61− imports = nub . concat $ importToIL <$> optimized'

62− implHeader = implHeaderSource modName imports project

63− implFooter = implFooterSource (runModuleName mn) foreigns

64− return $ (interface, foreigns', optimized', implHeader, implFooter)

65− where

66− modName = moduleNameToIL mn

67− modName' = AST.Var Nothing modName

68−

69− annotValue :: AST -> (Text, Bool)

70− annotValue (AST.Function _ (Just name) [] (AST.Block _ [AST.Return _ ret]))

71− | isLiteral ret = (name, True)

72− annotValue (AST.Function _ (Just name) [] _) = (name, False)

73− annotValue _ = error "Unexpected top-level value form"

74−

75− -- | Extracts all declaration names from a binding group.

76− getNames :: Bind Ann -> [Ident]

77− getNames (NonRec _ ident _) = [ident]

78− getNames (Rec vals) = map (snd . fst) vals

79−

80− -- | Generates IL code for a module import

81− --

82− importToIL :: AST -> [Text]

83− importToIL = AST.everything (++) modRef

84− where

85− modRef (AST.Indexer _ (AST.Var _ _) (AST.Var _ mname))

86− | not $ T.null mname = [extract mname]

87− modRef _ = []

88− extract :: Text -> Text

89− extract = T.replace "_" "." . T.dropWhileEnd (=='_')

90−

91− -- |

92− -- Generate code in the simplified intermediate representation for a declaration

93− --

94− bindToIL :: DeclType -> Bind Ann -> m [AST]

95− bindToIL dt (NonRec ann ident val) = return <$> nonRecToIL dt ann ident val

96− bindToIL dt (Rec vals) = forM vals (uncurry . uncurry $ nonRecToIL dt')

97− where

98− dt' = if dt == LetDecl then RecLetDecl else dt

99−

100− -- | Generate code in the simplified intermediate representation for a single non-recursive

101− -- declaration.

102− --

103− -- The main purpose of this function is to handle code generation for comments.

104− nonRecToIL :: DeclType -> Ann -> Ident -> Expr Ann -> m AST

105− nonRecToIL dt a i e@(extractAnn -> (_, com, _, _)) | not (null com) = do

106− -- withoutComment <- asks optionsNoComments

107− let withoutComment = False

108− if withoutComment

109− then nonRecToIL dt a i (modifyAnn removeComments e)

110− else AST.Comment Nothing com <$> nonRecToIL dt a i (modifyAnn removeComments e)

111− nonRecToIL ModuleDecl (ss, _, _, _) ident val = do

112− il <- valueToIL val

113− pure $ AST.Function Nothing (Just $ moduleIdentToIL ident) [] (AST.Block Nothing [AST.Return Nothing il])

114− nonRecToIL RecLetDecl (ss, _, _, _) ident val = do

115− ilExpr <- valueToIL val

116− pure $ AST.Assignment Nothing (AST.Var Nothing $ identToIL ident) ilExpr

117− nonRecToIL _ (ss, _, _, _) ident val = do

118− il <- valueToIL val

119− pure $ AST.VariableIntroduction Nothing (identToIL ident) (Just il)

120−

121− -- | Generate code in the simplified intermediate representation for a variable based on a

122− -- PureScript identifier.

123− var :: Ident -> AST

124− var = AST.Var Nothing . identToIL

125−

126− accessorString :: PSString -> AST -> AST

127− accessorString prop = AST.Indexer Nothing (AST.StringLiteral Nothing prop)

128−

129− -- | Generate code in the simplified intermediate representation for a value or expression.

130−

131− valueToIL :: Expr Ann -> m AST

132− valueToIL (Literal (pos, _, _, _) l) = literalToValueIL pos l

133− valueToIL (Accessor _ prop val) =

134− accessorString prop <$> valueToIL val

135− valueToIL (ObjectUpdate _ o ps) = do

136− obj <- valueToIL o

137− updates <- mapM (sndM valueToIL) ps

138− obj' <- freshName'

139− let objVar = AST.Var Nothing obj'

140− copy = AST.VariableIntroduction Nothing obj' (Just $ copyDict obj)

141− assign (k, v) = AST.Assignment Nothing (accessorString k objVar) v

142− sts = copy : (assign <$> updates) ++ [AST.Return Nothing objVar]

143− return $ AST.App Nothing (AST.Function Nothing Nothing [] (AST.Block Nothing sts)) []

144− valueToIL (Abs _ arg val) = do

145− ret <- valueToIL val

146− let ilArg = case arg of

147− UnusedIdent -> []

148− _ -> [identToIL arg]

149− return $ AST.Function Nothing Nothing ilArg (AST.Block Nothing [AST.Return Nothing ret])

150− valueToIL e@App{} = do

151− let (f, args) = unApp e []

152− args' <- mapM valueToIL args

153− fn <- valueToIL f

154− case f of

155− Var (_, _, _, Just IsNewtype) _ -> return (head args')

156− _ -> flip (foldl (\fn a -> AST.App Nothing fn [a])) args' <$> valueToIL f

157− where

158− unApp :: Expr Ann -> [Expr Ann] -> (Expr Ann, [Expr Ann])

159− unApp (App _ val arg) args = unApp val (arg : args)

160− unApp other args = (other, args)

161− valueToIL (Var _ ident) = return $ varToIL ident

162− valueToIL (Case (ss, _, _, _) values binders) = do

163− vals <- mapM valueToIL values

164− bindersToIL ss binders vals

165− valueToIL (Let _ ds val) = do

166− let recurs = concatMap getNames $ filter isRec ds

167− recurDs = (\v -> AST.VariableIntroduction Nothing (identToIL v) Nothing) <$> recurs

168− ds' <- concat <$> mapM (bindToIL LetDecl) ds

169− ret <- valueToIL val

170− return $ AST.App Nothing (AST.Function Nothing Nothing [] (AST.Block Nothing (recurDs ++ ds' ++ [AST.Return Nothing ret]))) []

171− where

172− isRec :: Bind Ann -> Bool

173− isRec (Rec _) = True

174− isRec _ = False

175− valueToIL (Constructor (_, _, _, Just IsNewtype) _ (ProperName ctor) _) = error "IsNewtype"

176− valueToIL (Constructor _ _ (ProperName ctor) fields) =

177− let body = AST.ObjectLiteral Nothing $ (mkString ctor, AST.BooleanLiteral Nothing True) :

178− ((\field -> (mkString (identToIL field), var field)) `map` fields)

179− fn = foldr (\f inner -> AST.Function Nothing Nothing [identToIL f] (AST.Block Nothing [AST.Return Nothing inner])) body fields

180− in return fn

181−

182−

183− iife :: Text -> [AST] -> AST

184− iife v exprs = AST.App Nothing (AST.Function Nothing Nothing [] (AST.Block Nothing $ exprs ++ [AST.Return Nothing $ AST.Var Nothing v])) []

185−

186− literalToValueIL :: SourceSpan -> Literal (Expr Ann) -> m AST

187− literalToValueIL ss (NumericLiteral (Left i)) = return $ AST.NumericLiteral (Just ss) (Left i)

188− literalToValueIL ss (NumericLiteral (Right n)) = return $ AST.NumericLiteral (Just ss) (Right n)

189− literalToValueIL ss (StringLiteral s) = return $ AST.StringLiteral (Just ss) s

190− literalToValueIL ss (CharLiteral c) = return $ AST.StringLiteral (Just ss) (fromString [c])

191− literalToValueIL ss (BooleanLiteral b) = return $ AST.BooleanLiteral (Just ss) b

192− literalToValueIL ss (ArrayLiteral xs) = AST.ArrayLiteral (Just ss) <$> mapM valueToIL xs

193− literalToValueIL ss (ObjectLiteral ps) = AST.ObjectLiteral (Just ss) <$> mapM (sndM valueToIL) ps

194−

195− -- | Generate code in the simplified intermediate representation for a reference to a

196− -- variable.

197− varToIL :: Qualified Ident -> AST

198− varToIL (Qualified Nothing ident) = var ident

199− varToIL qual = qualifiedToIL id qual

200−

201− -- | Generate code in the simplified intermediate representation for a reference to a

202− -- variable that may have a qualified name.

203− qualifiedToIL :: (a -> Ident) -> Qualified a -> AST

204− qualifiedToIL f (Qualified (Just (ModuleName mn')) a) | mn' == C.prim = AST.Var Nothing . moduleIdentToIL $ f a

205− qualifiedToIL f (Qualified (Just mn') a) | mn /= mn' = AST.Indexer Nothing (AST.Var Nothing . moduleIdentToIL $ f a) (AST.Var Nothing (moduleNameToIL mn'))

206− qualifiedToIL f (Qualified _ a) = AST.Indexer Nothing (AST.Var Nothing . moduleIdentToIL $ f a) (AST.Var Nothing "")

207−

208− -- foreignIdent :: Ident -> AST

209− -- foreignIdent ident = accessorString (mkString $ runIdent ident) (AST.Var Nothing "$foreign")

210−

211− -- | Generate code in the simplified intermediate representation for pattern match binders

212− -- and guards.

213− bindersToIL :: SourceSpan -> [CaseAlternative Ann] -> [AST] -> m AST

214− bindersToIL ss binders vals = do

215− valNames <- replicateM (length vals) freshName'

216− let assignments = zipWith (AST.VariableIntroduction Nothing) valNames (map Just vals)

217− ils <- forM binders $ \(CaseAlternative bs result) -> do

218− ret <- guardsToIL result

219− go valNames ret bs

220− return $ AST.App Nothing (AST.Function Nothing Nothing [] (AST.Block Nothing (assignments ++ concat ils ++ [AST.Throw Nothing (AST.StringLiteral Nothing $ mkString failedPatternMessage)])))

221− []

222− where

223− go :: [Text] -> [AST] -> [Binder Ann] -> m [AST]

224− go _ done [] = return done

225− go (v:vs) done' (b:bs) = do

226− done'' <- go vs done' bs

227− binderToIL v done'' b

228− go _ _ _ = internalError "Invalid arguments to bindersToIL"

229−

230− failedPatternMessage :: Text

231− failedPatternMessage = "Failed pattern match at " <> runModuleName mn <> " " <> displayStartEndPos ss

232−

233− guardsToIL :: Either [(Guard Ann, Expr Ann)] (Expr Ann) -> m [AST]

234− guardsToIL (Left gs) = traverse genGuard gs where

235− genGuard (cond, val) = do

236− cond' <- valueToIL cond

237− val' <- valueToIL val

238− return

239− (AST.IfElse Nothing (AST.Binary Nothing AST.EqualTo cond' (AST.BooleanLiteral Nothing True))

240− (AST.Block Nothing [AST.Return Nothing val']) Nothing)

241−

242− guardsToIL (Right v) = return . AST.Return Nothing <$> valueToIL v

243−

244− -- | Generate code in the simplified intermediate representation for a pattern match

245− -- binder.

246− binderToIL :: Text -> [AST] -> Binder Ann -> m [AST]

247− binderToIL _ done NullBinder{} = return done

248− binderToIL varName done (LiteralBinder _ l) =

249− literalToBinderIL varName done l

250− binderToIL varName done (VarBinder _ ident) =

251− return (AST.VariableIntroduction Nothing (identToIL ident) (Just (AST.Var Nothing varName)) : done)

252− binderToIL varName done (ConstructorBinder (_, _, _, Just IsNewtype) _ _ [b]) =

253− binderToIL varName done b

254− binderToIL varName done (ConstructorBinder (_, _, _, Just (IsConstructor ctorType fields)) _ (Qualified _ (ProperName ctor)) bs) = do

255− il <- go (zip fields bs) done

256− return $ case ctorType of

257− ProductType -> il

258− SumType ->

259− [AST.IfElse Nothing (AST.InstanceOf Nothing (AST.Var Nothing varName) (AST.StringLiteral Nothing (mkString ctor)))

260− (AST.Block Nothing il)

261− Nothing]

262− where

263− go :: [(Ident, Binder Ann)] -> [AST] -> m [AST]

264− go [] done' = return done'

265− go ((field, binder) : remain) done' = do

266− argVar <- freshName'

267− done'' <- go remain done'

268− il <- binderToIL argVar done'' binder

269− return (AST.VariableIntroduction Nothing argVar (Just $ accessorString (mkString $ identToIL field) $ AST.Var Nothing varName) : il)

270−

271− binderToIL _ _ ConstructorBinder{} =

272− internalError "binderToIL: Invalid ConstructorBinder in binderToIL"

273− binderToIL varName done (NamedBinder _ ident binder) = do

274− il <- binderToIL varName done binder

275− return (AST.VariableIntroduction Nothing (identToIL ident) (Just (AST.Var Nothing varName)) : il)

276−

277− literalToBinderIL :: Text -> [AST] -> Literal (Binder Ann) -> m [AST]

278− literalToBinderIL varName done (NumericLiteral num) =

279− return [AST.IfElse Nothing (AST.Binary Nothing AST.EqualTo (AST.Var Nothing varName) (AST.NumericLiteral Nothing num)) (AST.Block Nothing done) Nothing]

280− literalToBinderIL varName done (CharLiteral c) =

281− return [AST.IfElse Nothing (AST.Binary Nothing AST.EqualTo (AST.Var Nothing varName) (AST.StringLiteral Nothing (fromString [c]))) (AST.Block Nothing done) Nothing]

282− literalToBinderIL varName done (StringLiteral str) =

283− return [AST.IfElse Nothing (AST.Binary Nothing AST.EqualTo (AST.Var Nothing varName) (AST.StringLiteral Nothing str)) (AST.Block Nothing done) Nothing]

284− literalToBinderIL varName done (BooleanLiteral True) =

285− return [AST.IfElse Nothing (AST.Binary Nothing AST.EqualTo (AST.Var Nothing varName) (AST.BooleanLiteral Nothing True)) (AST.Block Nothing done) Nothing]

286− literalToBinderIL varName done (BooleanLiteral False) =

287− return [AST.IfElse Nothing (AST.Binary Nothing AST.EqualTo (AST.Var Nothing varName) (AST.BooleanLiteral Nothing False)) (AST.Block Nothing done) Nothing]

288− -- return [AST.IfElse Nothing (AST.Unary Nothing AST.Not (AST.Var Nothing varName)) (AST.Block Nothing done) Nothing]

289− literalToBinderIL varName done (ObjectLiteral bs) = go done bs

290− where

291− go :: [AST] -> [(PSString, Binder Ann)] -> m [AST]

292− go done' [] = return done'

293− go done' ((prop, binder):bs') = do

294− propVar <- freshName'

295− done'' <- go done' bs'

296− il <- binderToIL propVar done'' binder

297− return (AST.VariableIntroduction Nothing propVar (Just (accessorString prop (AST.Var Nothing varName))) : il)

298− literalToBinderIL varName done (ArrayLiteral bs) = do

299− il <- go done 0 bs

300− return [AST.IfElse Nothing (AST.Binary Nothing AST.EqualTo

301− (arrayLength $ AST.Var Nothing varName)

302− (AST.NumericLiteral Nothing (Left (fromIntegral $ length bs))))

303− (AST.Block Nothing il) Nothing]

304− where

305− go :: [AST] -> Integer -> [Binder Ann] -> m [AST]

306− go done' _ [] = return done'

307− go done' index (binder:bs') = do

308− elVar <- freshName'

309− done'' <- go done' (index + 1) bs'

310− il <- binderToIL elVar done'' binder

311− return (AST.VariableIntroduction Nothing elVar (Just (AST.Indexer Nothing (AST.NumericLiteral Nothing (Left index)) (AST.Var Nothing varName))) : il)

312−

313−emptyAnn :: Ann

314−emptyAnn = (SourceSpan "" (SourcePos 0 0) (SourcePos 0 0), [], Nothing, Nothing)

315−

316−arrayLength :: AST -> AST

317−arrayLength a = AST.App Nothing (AST.Var Nothing arrayLengthFn) [a]

318−-- arrayLength a = AST.Var Nothing (arrayLengthFn <> "(" <> prettyPrintIL1 a <> ")")

319−

320−copyDict :: AST -> AST

321−copyDict a = AST.App Nothing (AST.Var Nothing copyDictFn) [a]

src/CodeGen/IL/Common.hsdeleted−196

@@ -1,196 +0,0 @@

1−-- | Common code generation utility functions

2−module CodeGen.IL.Common where

3−

4−import Prelude.Compat

5−

6−import Control.Monad.Supply.Class (MonadSupply, freshName)

7−import Data.Char

8−import Data.Maybe (maybe)

9−import Data.Monoid ((<>))

10−import Data.Text (Text)

11−import qualified Data.Text as T

12−

13−import Language.PureScript.Crash

14−import Language.PureScript.Names

15−

16−import qualified Language.PureScript.Constants as C

17−

18−moduleNameToIL :: ModuleName -> Text

19−moduleNameToIL (ModuleName mn) =

20− let name = T.replace "." "_" mn

21− in if nameIsILBuiltIn name then (name <> moduleRenamerMarker) else name

22−

23−moduleNameToIL' :: ModuleName -> Text

24−moduleNameToIL' (ModuleName mn) = T.replace "_" "." mn

25−

26−-- | Convert an 'Ident' into a valid IL identifier:

27−--

28−-- * Alphanumeric characters are kept unmodified.

29−--

30−-- * Reserved IL identifiers are wrapped with '_'.

31−--

32−identToIL :: Ident -> Text

33−identToIL UnusedIdent = unusedName

34−identToIL (Ident "$__unused") = unusedName

35−identToIL (Ident name) | name == C.undefined = undefinedName -- Note: done in Printer.hs too

36−identToIL (Ident name) = properToIL name

37−identToIL (GenIdent _ _) = internalError "GenIdent in identToIL"

38−

39−moduleIdentToIL :: Ident -> Text

40−moduleIdentToIL UnusedIdent = unusedName

41−moduleIdentToIL (Ident name) | name == C.undefined = undefinedName

42−moduleIdentToIL (Ident name) = moduleProperToIL name

43−moduleIdentToIL (GenIdent _ _) = internalError "GenIdent in identToIL"

44−

45−undefinedName :: Text

46−undefinedName = "Undefined"

47−

48−unusedName :: Text

49−unusedName = "_"

50−

51−properToIL :: Text -> Text

52−properToIL name

53− | nameIsILReserved name = "ˉ" <> name

54− | otherwise = T.concatMap identCharToText name

55−

56−-- | Attempts to find a human-readable name for a symbol, if none has been specified returns the

57−-- ordinal value.

58−identCharToText :: Char -> Text

59−identCharToText 'ṩ' = "_ṩ"

60−identCharToText c | isAlphaNum c = T.singleton c

61−identCharToText '_' = "_"

62−identCharToText '\'' = "ꞌ" -- lowercase saltillo

63−identCharToText c = error (show (ord c)) -- TODO: should never occur now(?)

64−

65−moduleProperToIL :: Text -> Text

66−moduleProperToIL = T.concatMap identCharToText

67−

68−-- | Checks whether an identifier name is reserved in IL.

69−nameIsILReserved :: Text -> Bool

70−nameIsILReserved name =

71− name `elem` ilAnyReserved

72−

73−-- | Checks whether a name matches a built-in value in IL.

74−nameIsILBuiltIn :: Text -> Bool

75−nameIsILBuiltIn name =

76− name `elem`

77− [ "Any"

78− , "Apply"

79− , "Contains"

80− , "CopyDict"

81− , "Dict"

82− , "EffFn"

83− , "Fn"

84− , "Foreign"

85− , "Get"

86− , "Index"

87− , "Is"

88− , "Length"

89− , "Once"

90− , "Run"

91− , "Undefined"

92− ]

93−

94−ilAnyReserved :: [Text]

95−ilAnyReserved =

96− concat

97− [ ilKeywords

98− , ilLiterals

99− ]

100−

101−ilKeywords :: [Text]

102−ilKeywords =

103− [ "break"

104− , "case"

105− , "chan"

106− , "const"

107− , "continue"

108− , "default"

109− , "defer"

110− , "else"

111− , "fallthrough"

112− , "for"

113− , "func"

114− , "go"

115− , "goto"

116− , "if"

117− , "import"

118− , "interface"

119− , "map"

120− , "package"

121− , "range"

122− , "return"

123− , "select"

124− , "struct"

125− , "switch"

126− , "type"

127− , "var"

128− ]

129−

130−ilLiterals :: [Text]

131−ilLiterals =

132− [ "init"

133− , "nil"

134− , "int"

135− , "int8"

136− , "int16"

137− , "int32"

138− , "int64"

139− , "uint"

140− , "uint8"

141− , "uint16"

142− , "uint32"

143− , "uint64"

144− , "uintptr"

145− , "float32"

146− , "float64"

147− , "complex64"

148− , "complex128"

149− , "byte"

150− , "rune"

151− , "string"

152− ]

153−

154−withPrefix :: Text -> Text

155−withPrefix s = "Ꞌ" <> s -- uppercase saltillo

156−

157−anyType :: Text

158−anyType = "Any"

159−

160−dictType :: Text

161−dictType = "Dict"

162−

163−arrayType :: Text

164−arrayType = "[]" <> anyType

165−

166−uncurriedFnType :: Int -> Text

167−uncurriedFnType i = "Fn" <> (T.pack . show $ i)

168−

169−int :: Text

170−int = "int"

171−

172−float :: Text

173−float = "float64"

174−

175−bool :: Text

176−bool = "bool"

177−

178−string :: Text

179−string = "string"

180−

181−arrayLengthFn :: Text

182−arrayLengthFn = "Length"

183−

184−indexFn :: Text

185−indexFn = "Index"

186−

187−copyDictFn :: Text

188−copyDictFn = "CopyDict"

189−

190−freshName' :: MonadSupply m => m Text

191−freshName' = do

192− name <- freshName

193− return $ T.replace "$" "ṩ" name

194−

195−moduleRenamerMarker :: Text

196−moduleRenamerMarker = "__"

src/CodeGen/IL/Optimizer.hsdeleted−81

@@ -1,81 +0,0 @@

1−-- | This module optimizes code in the intermediate representation.

2−module CodeGen.IL.Optimizer (optimize) where

3−

4−import Prelude.Compat

5−

6−import Control.Monad.Supply.Class (MonadSupply)

7−import Data.Text (Text)

8−import Language.PureScript.CoreImp.AST

9−import Language.PureScript.CoreImp.Optimizer.Blocks

10−import Language.PureScript.CoreImp.Optimizer.Common hiding (isDict)

11−import Language.PureScript.CoreImp.Optimizer.Inliner (etaConvert, evaluateIifes, inlineVariables, unThunk)

12−import Language.PureScript.CoreImp.Optimizer.Unused

13−

14−import CodeGen.IL.Common (unusedName)

15−import CodeGen.IL.Optimizer.Inliner

16−import CodeGen.IL.Optimizer.MagicDo

17−import CodeGen.IL.Optimizer.TCO

18−

19−import qualified Language.PureScript.Constants as C

20−

21−-- | Apply a series of optimizer passes to simplified IL code

22−optimize :: MonadSupply m => AST -> AST -> m AST

23−optimize mn il = do

24− il' <- untilFixedPoint (inlineFnComposition . inlineUnsafeCoerce . inlineUnsafePartial . tidyUp) il

25− il'' <- untilFixedPoint (return . ignoreUnusedResults . inlineCommonValues . inlineCommonOperators . tidyUp) . tco mn . inlineST

26− =<< untilFixedPoint (return . magicDoST)

27− =<< untilFixedPoint (return . magicDoEff)

28− =<< untilFixedPoint (return . magicDoEffect) il'

29− untilFixedPoint (return . collapseVarDeclarations) il''

30− where

31− tidyUp :: AST -> AST

32− tidyUp = applyAll

33− [ collapseNestedBlocks

34− , collapseNestedIfs

35− , collapseIfChecks

36− , removeCodeAfterReturnStatements

37− , unThunk

38− , etaConvert

39− , evaluateIifes

40− , inlineVariables

41− ]

42−

43−untilFixedPoint :: (Monad m, Eq a) => (a -> m a) -> a -> m a

44−untilFixedPoint f = go

45− where

46− go a = do

47− a' <- f a

48− if a' == a then return a' else go a'

49−

50−collapseIfChecks :: AST -> AST

51−collapseIfChecks = everywhere collapse where

52− collapse :: AST -> AST

53− collapse (IfElse _ (Binary _ EqualTo (BooleanLiteral _ True) (BooleanLiteral _ True)) (Block _ [exprs]) _) = exprs

54− collapse (IfElse _ (Binary _ EqualTo (Indexer _ (Var _ prop) (Var _ val)) (BooleanLiteral _ True)) (Block _ [exprs]) _)

55− | prop == "otherwise" && val == "Data_Boolean" = exprs

56− collapse exprs = exprs

57−

58−collapseVarDeclarations :: AST -> AST

59−collapseVarDeclarations = everywhere collapse where

60− collapse :: AST -> AST

61− collapse (Block ss sts) = Block ss (go Nothing sts)

62− collapse s = s

63−

64− go :: Maybe Text -> [AST] -> [AST]

65− go _ [] = []

66− go Nothing (decl@(VariableIntroduction _ var (Just _)) : sts) = decl : go (Just var) (go Nothing sts)

67− go (Just var') ((VariableIntroduction ss var (Just val)) : sts)

68− | var == var' = (Assignment ss (Var Nothing var) val) : go (Just var') sts

69− go var' (s:sts) = s : go var' sts

70−

71−ignoreUnusedResults :: AST -> AST

72−ignoreUnusedResults = everywhere $ removeFromBlock go

73− where

74− go :: [AST] -> [AST]

75− go [] = []

76− go (VariableIntroduction ss var (Just s) : sts)

77− | not $ any (everything (||) (isUsed var)) sts = sts'

78− where

79− sts' | App{} <- s = s : (go sts)

80− | otherwise = go sts

81− go (s:sts) = s : go sts

src/CodeGen/IL/Optimizer/Common.hsdeleted−18

@@ -1,18 +0,0 @@

1−-- | Common functions used by the various optimizer phases

2−module CodeGen.IL.Optimizer.Common where

3−

4−import Prelude.Compat

5−

6−import Data.Text (Text)

7−

8−import Language.PureScript.CoreImp.AST

9−import Language.PureScript.PSString (PSString, decodeString)

10−

11−isDict :: (Text, PSString) -> AST -> Bool

12−isDict (moduleName, dictName) (Indexer _ (Var _ x) (Var _ y)) =

13− Just x == decodeString dictName && y == moduleName

14−isDict _ _ = False

15−

16−isDict' :: [(Text, PSString)] -> AST -> Bool

17−isDict' xs il = any (`isDict` il) xs

18−

src/CodeGen/IL/Optimizer/Inliner.hsdeleted−435

@@ -1,435 +0,0 @@

1−-- | This module performs basic inlining of known functions

2−module CodeGen.IL.Optimizer.Inliner

3− ( inlineCommonValues

4− , inlineCommonOperators

5− , inlineFnComposition

6− , inlineUnsafeCoerce

7− , inlineUnsafePartial

8− ) where

9−

10−import Prelude.Compat

11−

12−import Control.Monad.Supply.Class (MonadSupply)

13−

14−import Data.Either (rights)

15−import Data.Maybe (fromMaybe)

16−import Data.String (IsString, fromString)

17−import Data.Text (Text)

18−import qualified Data.Text as T

19−

20−import Language.PureScript.PSString (PSString, decodeString, mkString)

21−import Language.PureScript.CoreImp.AST

22−import Language.PureScript.CoreImp.Optimizer.Common hiding (isDict, isDict')

23−import Language.PureScript.AST (SourceSpan(..))

24−import qualified Language.PureScript.Constants as C

25−

26−import CodeGen.IL.Common

27−import CodeGen.IL.Optimizer.Common

28−

29−-- TODO: Potential bug:

30−-- Shouldn't just inline this case: { var x = 0; x.toFixed(10); }

31−-- Needs to be: { 0..toFixed(10); }

32−-- Probably needs to be fixed in pretty-printer instead.

33−shouldInline :: AST -> Bool

34−shouldInline (Var _ _) = True

35−shouldInline (NumericLiteral _ _) = True

36−shouldInline (StringLiteral _ _) = True

37−shouldInline (BooleanLiteral _ _) = True

38−shouldInline (Indexer _ index val) = shouldInline index && shouldInline val

39−shouldInline _ = False

40−

41−inlineCommonValues :: AST -> AST

42−inlineCommonValues = everywhere convert

43− where

44− convert :: AST -> AST

45− convert (App ss fn [dict])

46− | isDict' [semiringNumber, semiringInt] dict && isDict fnZero fn = NumericLiteral ss (Left 0)

47− | isDict' [semiringNumber, semiringInt] dict && isDict fnOne fn = NumericLiteral ss (Left 1)

48− | isDict boundedBoolean dict && isDict fnBottom fn = BooleanLiteral ss False

49− | isDict boundedBoolean dict && isDict fnTop fn = BooleanLiteral ss True

50− convert (App ss (App _ fn [dict]) [x])

51− | isDict ringInt dict && isDict fnNegate fn = Unary ss Negate (unbox x $ snd ringInt)

52− convert (App ss (App _ (App _ fn [dict]) [x]) [y])

53− | isDict semiringInt dict && isDict fnAdd fn = intOp ss Add semiringInt x y

54− | isDict semiringInt dict && isDict fnMultiply fn = intOp ss Multiply semiringInt x y

55− | isDict ringInt dict && isDict fnSubtract fn = intOp ss Subtract ringInt x y

56− convert other = other

57− fnZero = (C.dataSemiring, C.zero)

58− fnOne = (C.dataSemiring, C.one)

59− fnBottom = (C.dataBounded, C.bottom)

60− fnTop = (C.dataBounded, C.top)

61− fnAdd = (C.dataSemiring, C.add)

62− fnMultiply = (C.dataSemiring, C.mul)

63− fnSubtract = (C.dataRing, C.sub)

64− fnNegate = (C.dataRing, C.negate)

65− intOp ss op (_, d) x y = Binary ss op (unbox x d) (unbox y d)

66−

67−inlineCommonOperators :: AST -> AST

68−inlineCommonOperators = everywhereTopDown $ applyAll $

69− [ binary semiringNumber opAdd Add

70− , binary semiringNumber opMul Multiply

71−

72− , binary ringNumber opSub Subtract

73− , unary ringNumber opNegate Negate

74−

75− , binary euclideanRingNumber opDiv Divide

76−

77− -- , binary eqNumber opEq EqualTo

78− -- , binary eqNumber opNotEq NotEqualTo

79− , binary eqInt opEq EqualTo

80− , binary eqInt opNotEq NotEqualTo

81− , binary eqString opEq EqualTo

82− , binary eqString opNotEq NotEqualTo

83− , binary eqChar opEq EqualTo

84− , binary eqChar opNotEq NotEqualTo

85− , binary eqBoolean opEq EqualTo

86− , binary eqBoolean opNotEq NotEqualTo

87−

88− , binary ordBoolean opLessThan LessThan

89− , binary ordBoolean opLessThanOrEq LessThanOrEqualTo

90− , binary ordBoolean opGreaterThan GreaterThan

91− , binary ordBoolean opGreaterThanOrEq GreaterThanOrEqualTo

92− , binary ordChar opLessThan LessThan

93− , binary ordChar opLessThanOrEq LessThanOrEqualTo

94− , binary ordChar opGreaterThan GreaterThan

95− , binary ordChar opGreaterThanOrEq GreaterThanOrEqualTo

96− , binary ordInt opLessThan LessThan

97− , binary ordInt opLessThanOrEq LessThanOrEqualTo

98− , binary ordInt opGreaterThan GreaterThan

99− , binary ordInt opGreaterThanOrEq GreaterThanOrEqualTo

100− , binary ordNumber opLessThan LessThan

101− , binary ordNumber opLessThanOrEq LessThanOrEqualTo

102− , binary ordNumber opGreaterThan GreaterThan

103− , binary ordNumber opGreaterThanOrEq GreaterThanOrEqualTo

104− , binary ordString opLessThan LessThan

105− , binary ordString opLessThanOrEq LessThanOrEqualTo

106− , binary ordString opGreaterThan GreaterThan

107− , binary ordString opGreaterThanOrEq GreaterThanOrEqualTo

108−

109− , binary semigroupString opAppend Add

110−

111− , binary heytingAlgebraBoolean opConj And

112− , binary heytingAlgebraBoolean opDisj Or

113− , unary heytingAlgebraBoolean opNot Not

114−

115− , binary' C.dataIntBits C.or BitwiseOr

116− , binary' C.dataIntBits C.and BitwiseAnd

117− , binary' C.dataIntBits C.xor BitwiseXor

118− , binary' C.dataIntBits C.shl ShiftLeft

119− , binary' C.dataIntBits C.shr ShiftRight

120− , unary' C.dataIntBits C.complement BitwiseNot

121−

122− , inlineNonClassFunction (isModFn (C.dataFunction, C.apply)) $ \f x -> App Nothing f [x]

123− , inlineNonClassFunction (isModFn (C.dataFunction, C.applyFlipped)) $ \x f -> App Nothing f [x]

124− , inlineUnsafeIndex (isModFnWithDict (C.dataArray, C.unsafeIndex)) $ flip (Indexer Nothing)

125− ] ++

126− [ fn | i <- [0..10], fn <- [ mkFn i, runFn i ] ] ++

127− [ fn | i <- [0..10], fn <- [ mkEffFn C.controlMonadEffUncurried C.mkEffFn i, runEffFn C.controlMonadEffUncurried C.runEffFn i ] ] ++

128− [ fn | i <- [0..10], fn <- [ mkEffFn C.effectUncurried C.mkEffectFn i, runEffFn C.effectUncurried C.runEffectFn i ] ]

129− where

130− binary :: (Text, PSString) -> (Text, PSString) -> BinaryOperator -> AST -> AST

131− binary dict@(_, d) fns op = convert where

132− convert :: AST -> AST

133− convert (App ss (App _ (App _ fn [dict']) [x]) [y])

134− | isDict dict dict' && isDict fns fn = Binary ss op (unbox x d) (unbox y d)

135− convert other = other

136− binary' :: Text -> PSString -> BinaryOperator -> AST -> AST

137− binary' moduleName opString op = convert where

138− convert :: AST -> AST

139− convert (App ss (App _ fn [x]) [y]) | isDict (moduleName, opString) fn = Binary ss op (unbox x mn) (unbox y mn)

140− convert other = other

141− mn :: PSString

142− mn = mkString moduleName

143− unary :: (Text, PSString) -> (Text, PSString) -> UnaryOperator -> AST -> AST

144− unary dicts@(_, d) fns op = convert where

145− convert :: AST -> AST

146− convert (App ss (App _ fn [dict']) [x]) | isDict dicts dict' && isDict fns fn = Unary ss op (unbox x d)

147− convert other = other

148− unary' :: Text -> PSString -> UnaryOperator -> AST -> AST

149− unary' moduleName fnName op = convert where

150− convert :: AST -> AST

151− convert (App ss fn [x]) | isDict (moduleName, fnName) fn = Unary ss op (unbox x fnName)

152− convert other = other

153−

154− mkFn :: Int -> AST -> AST

155− mkFn = mkFn' C.dataFunctionUncurried C.mkFn $ \ss1 ss2 ss3 args il ->

156− Function ss1 Nothing args (Block ss2 [Return ss3 il])

157−

158− mkEffFn :: Text -> Text -> Int -> AST -> AST

159− mkEffFn modName fnName = mkFn' modName fnName $ \ss1 ss2 ss3 args il ->

160− Function ss1 Nothing args (Block ss2 [Return ss3 (App ss3 il [])])

161−

162− mkFn' :: Text -> Text -> (Maybe SourceSpan -> Maybe SourceSpan -> Maybe SourceSpan -> [Text] -> AST -> AST) -> Int -> AST -> AST

163− mkFn' modName fnName res 0 = convert where

164− convert :: AST -> AST

165− convert (App _ mkFnN [Function s1 Nothing [_] (Block s2 [Return s3 il])]) | isNFn modName fnName 0 mkFnN =

166− res s1 s2 s3 [] il

167− convert other = other

168− mkFn' modName fnName res n = convert where

169− convert :: AST -> AST

170− convert orig@(App ss mkFnN [fn]) | isNFn modName fnName n mkFnN =

171− case collectArgs n [] fn of

172− Just (args, [Return ss' ret]) -> res ss ss ss' args ret

173− _ -> orig

174− convert other = other

175− collectArgs :: Int -> [Text] -> AST -> Maybe ([Text], [AST])

176− collectArgs 1 acc (Function _ Nothing [oneArg] (Block _ il)) | length acc == n - 1 = Just (reverse (oneArg : acc), il)

177− collectArgs m acc (Function _ Nothing [oneArg] (Block _ [Return _ ret])) = collectArgs (m - 1) (oneArg : acc) ret

178− collectArgs _ _ _ = Nothing

179−

180− isNFn :: Text -> Text -> Int -> AST -> Bool

181− isNFn expectMod prefix n (Indexer _ (Var _ name) (Var _ modName)) | modName == expectMod =

182− name == fromString (T.unpack prefix <> show n)

183− isNFn _ _ _ _ = False

184−

185− runFn :: Int -> AST -> AST

186− runFn = runFn' C.dataFunctionUncurried C.runFn (\ss f args ->

187− let len = length args

188− typ = mkString $ uncurriedFnType len in

189− if len > 0

190− then App ss (App Nothing (StringLiteral Nothing typ) [f]) args

191− else App ss f args)

192− runEffFn :: Text -> Text -> Int -> AST -> AST

193− runEffFn modName fnName = runFn' modName fnName $ \ss fn acc ->

194− let typ = mkString . uncurriedFnType $ length acc in

195− Function ss Nothing [] (Block ss [Return ss (App ss (App Nothing (StringLiteral Nothing typ) [fn]) acc)])

196−

197− runFn' :: Text -> Text -> (Maybe SourceSpan -> AST -> [AST] -> AST) -> Int -> AST -> AST

198− runFn' modName runFnName res n = convert where

199− convert :: AST -> AST

200− convert il = fromMaybe il $ go n [] il

201−

202− go :: Int -> [AST] -> AST -> Maybe AST

203− go 0 acc (App ss runFnN [fn]) | isNFn modName runFnName n runFnN && length acc == n =

204− Just $ res ss fn acc

205− go m acc (App _ lhs [arg]) = go (m - 1) (arg : acc) lhs

206− go _ _ _ = Nothing

207−

208− inlineNonClassFunction :: (AST -> Bool) -> (AST -> AST -> AST) -> AST -> AST

209− inlineNonClassFunction p f = convert where

210− convert :: AST -> AST

211− convert (App _ (App _ op' [x]) [y]) | p op' = f x y

212− convert other = other

213−

214− inlineUnsafeIndex :: (AST -> Bool) -> (AST -> AST -> AST) -> AST -> AST

215− inlineUnsafeIndex p _ = convert where

216− convert :: AST -> AST

217− convert (App _ (App ss op' [x]) [y@NumericLiteral{}])

218− | p op' = Indexer ss y x

219− convert (App _ (App ss op' [x]) [y])

220− | p op' = App ss (Var Nothing indexFn) [x, y]

221− convert other = other

222−

223− isModFn :: (Text, PSString) -> AST -> Bool

224− isModFn (m, op) (Indexer _ (Var _ op') (Var _ m')) =

225− m == m' && decodeString op == Just op'

226− isModFn _ _ = False

227−

228− isModFnWithDict :: (Text, PSString) -> AST -> Bool

229− isModFnWithDict (m, op) (App _ (Indexer _ (Var _ op') (Var _ m')) [Var _ _]) =

230− m == m' && decodeString op == Just op'

231− isModFnWithDict _ _ = False

232−

233−-- (f <<< g $ x) = f (g x)

234−-- (f <<< g) = \x -> f (g x)

235−inlineFnComposition :: forall m. MonadSupply m => AST -> m AST

236−inlineFnComposition = everywhereTopDownM convert where

237− convert :: AST -> m AST

238− convert (App s1 (App s2 (App _ (App _ fn [dict']) [x]) [y]) [z])

239− | isFnCompose dict' fn = return $ App s1 x [App s2 y [z]]

240− | isFnComposeFlipped dict' fn = return $ App s2 y [App s1 x [z]]

241− convert app@(App ss (App _ (App _ fn [dict']) _) _)

242− | isFnCompose dict' fn || isFnComposeFlipped dict' fn = mkApps ss <$> goApps app <*> freshName'

243− convert other = return other

244−

245− mkApps :: Maybe SourceSpan -> [Either AST (Text, AST)] -> Text -> AST

246− mkApps ss fns a = App ss (Function ss Nothing [] (Block ss $ vars <> [Return Nothing comp])) []

247− where

248− vars = uncurry (VariableIntroduction ss) . fmap Just <$> rights fns

249− comp = Function ss Nothing [a] (Block ss [Return Nothing apps])

250− apps = foldr (\fn acc -> App ss (mkApp fn) [acc]) (Var ss a) fns

251−

252− mkApp :: Either AST (Text, AST) -> AST

253− mkApp = either id $ \(name, arg) -> Var (getSourceSpan arg) name

254−

255− goApps :: AST -> m [Either AST (Text, AST)]

256− goApps (App _ (App _ (App _ fn [dict']) [x]) [y])

257− | isFnCompose dict' fn = mappend <$> goApps x <*> goApps y

258− | isFnComposeFlipped dict' fn = mappend <$> goApps y <*> goApps x

259− goApps app@(App {}) = pure . Right . (,app) <$> freshName'

260− goApps other = pure [Left other]

261−

262− isFnCompose :: AST -> AST -> Bool

263− isFnCompose dict' fn = isDict semigroupoidFn dict' && isDict fnCompose fn

264−

265− isFnComposeFlipped :: AST -> AST -> Bool

266− isFnComposeFlipped dict' fn = isDict semigroupoidFn dict' && isDict fnComposeFlipped fn

267−

268− fnCompose :: forall a b. (IsString a, IsString b) => (a, b)

269− fnCompose = (C.controlSemigroupoid, C.compose)

270−

271− fnComposeFlipped :: forall a b. (IsString a, IsString b) => (a, b)

272− fnComposeFlipped = (C.controlSemigroupoid, C.composeFlipped)

273−

274−inlineUnsafeCoerce :: AST -> AST

275−inlineUnsafeCoerce = everywhereTopDown convert where

276− convert (App _ (Indexer _ (Var _ unsafeCoerceFn) (Var _ unsafeCoerce)) [ comp ])

277− | unsafeCoerceFn == C.unsafeCoerceFn && unsafeCoerce == C.unsafeCoerce

278− = comp

279− convert other = other

280−

281−inlineUnsafePartial :: AST -> AST

282−inlineUnsafePartial = everywhereTopDown convert where

283− convert (App ss fn [ comp ])

284− | isDict fnUnsafePartial fn

285− = App ss comp []

286− where

287− fnUnsafePartial :: forall a b. (IsString a, IsString b) => (a, b)

288− fnUnsafePartial = (C.partialUnsafe, C.unsafePartial)

289− convert other = other

290−

291−semiringNumber :: forall a b. (IsString a, IsString b) => (a, b)

292−semiringNumber = (C.dataSemiring, C.semiringNumber)

293−

294−semiringInt :: forall a b. (IsString a, IsString b) => (a, b)

295−semiringInt = (C.dataSemiring, C.semiringInt)

296−

297−ringNumber :: forall a b. (IsString a, IsString b) => (a, b)

298−ringNumber = (C.dataRing, C.ringNumber)

299−

300−ringInt :: forall a b. (IsString a, IsString b) => (a, b)

301−ringInt = (C.dataRing, C.ringInt)

302−

303−euclideanRingNumber :: forall a b. (IsString a, IsString b) => (a, b)

304−euclideanRingNumber = (C.dataEuclideanRing, C.euclideanRingNumber)

305−

306−-- eqNumber :: forall a b. (IsString a, IsString b) => (a, b)

307−-- eqNumber = (C.dataEq, C.eqNumber)

308−

309−eqInt :: forall a b. (IsString a, IsString b) => (a, b)

310−eqInt = (C.dataEq, C.eqInt)

311−

312−eqString :: forall a b. (IsString a, IsString b) => (a, b)

313−eqString = (C.dataEq, C.eqString)

314−

315−eqChar :: forall a b. (IsString a, IsString b) => (a, b)

316−eqChar = (C.dataEq, C.eqChar)

317−

318−eqBoolean :: forall a b. (IsString a, IsString b) => (a, b)

319−eqBoolean = (C.dataEq, C.eqBoolean)

320−

321−ordBoolean :: forall a b. (IsString a, IsString b) => (a, b)

322−ordBoolean = (C.dataOrd, C.ordBoolean)

323−

324−ordNumber :: forall a b. (IsString a, IsString b) => (a, b)

325−ordNumber = (C.dataOrd, C.ordNumber)

326−

327−ordInt :: forall a b. (IsString a, IsString b) => (a, b)

328−ordInt = (C.dataOrd, C.ordInt)

329−

330−ordString :: forall a b. (IsString a, IsString b) => (a, b)

331−ordString = (C.dataOrd, C.ordString)

332−

333−ordChar :: forall a b. (IsString a, IsString b) => (a, b)

334−ordChar = (C.dataOrd, C.ordChar)

335−

336−semigroupString :: forall a b. (IsString a, IsString b) => (a, b)

337−semigroupString = (C.dataSemigroup, C.semigroupString)

338−

339−boundedBoolean :: forall a b. (IsString a, IsString b) => (a, b)

340−boundedBoolean = (C.dataBounded, C.boundedBoolean)

341−

342−heytingAlgebraBoolean :: forall a b. (IsString a, IsString b) => (a, b)

343−heytingAlgebraBoolean = (C.dataHeytingAlgebra, C.heytingAlgebraBoolean)

344−

345−semigroupoidFn :: forall a b. (IsString a, IsString b) => (a, b)

346−semigroupoidFn = (C.controlSemigroupoid, C.semigroupoidFn)

347−

348−opAdd :: forall a b. (IsString a, IsString b) => (a, b)

349−opAdd = (C.dataSemiring, C.add)

350−

351−opMul :: forall a b. (IsString a, IsString b) => (a, b)

352−opMul = (C.dataSemiring, C.mul)

353−

354−opEq :: forall a b. (IsString a, IsString b) => (a, b)

355−opEq = (C.dataEq, C.eq)

356−

357−opNotEq :: forall a b. (IsString a, IsString b) => (a, b)

358−opNotEq = (C.dataEq, C.notEq)

359−

360−opLessThan :: forall a b. (IsString a, IsString b) => (a, b)

361−opLessThan = (C.dataOrd, C.lessThan)

362−

363−opLessThanOrEq :: forall a b. (IsString a, IsString b) => (a, b)

364−opLessThanOrEq = (C.dataOrd, C.lessThanOrEq)

365−

366−opGreaterThan :: forall a b. (IsString a, IsString b) => (a, b)

367−opGreaterThan = (C.dataOrd, C.greaterThan)

368−

369−opGreaterThanOrEq :: forall a b. (IsString a, IsString b) => (a, b)

370−opGreaterThanOrEq = (C.dataOrd, C.greaterThanOrEq)

371−

372−opAppend :: forall a b. (IsString a, IsString b) => (a, b)

373−opAppend = (C.dataSemigroup, C.append)

374−

375−opSub :: forall a b. (IsString a, IsString b) => (a, b)

376−opSub = (C.dataRing, C.sub)

377−

378−opNegate :: forall a b. (IsString a, IsString b) => (a, b)

379−opNegate = (C.dataRing, C.negate)

380−

381−opDiv :: forall a b. (IsString a, IsString b) => (a, b)

382−opDiv = (C.dataEuclideanRing, C.div)

383−

384−opConj :: forall a b. (IsString a, IsString b) => (a, b)

385−opConj = (C.dataHeytingAlgebra, C.conj)

386−

387−opDisj :: forall a b. (IsString a, IsString b) => (a, b)

388−opDisj = (C.dataHeytingAlgebra, C.disj)

389−

390−opNot :: forall a b. (IsString a, IsString b) => (a, b)

391−opNot = (C.dataHeytingAlgebra, C.not)

392−

393−unbox :: AST -> PSString -> AST

394−unbox e d = select . inlineCommonValues $ inlineCommonOperators e

395− where

396− select :: AST -> AST

397− select e' =

398− case e' of

399− Var{} -> unbox' e'

400− App{} -> unbox' e'

401− Indexer{} -> unbox' e'

402− _ -> e'

403− unbox' :: AST -> AST

404− unbox' e' = maybe e' (\t -> App Nothing (StringLiteral Nothing t) [e']) $ unboxType d

405−

406−unboxType :: PSString -> Maybe PSString

407−unboxType s = do

408− t <- decodeString s

409− t' <- unboxType' t

410− return $ mkString t'

411− where

412− unboxType' :: Text -> Maybe Text

413− unboxType' t

414− | t == C.eqInt ||

415− t == C.semiringInt ||

416− t == C.ringInt ||

417− t == C.ordInt ||

418− t == C.dataIntBits

419− = Just int

420− | t == C.semiringNumber ||

421− t == C.ringNumber ||

422− t == C.ordNumber ||

423− t == C.euclideanRingNumber

424− = Just float

425− | t == C.eqBoolean ||

426− t == C.ordBoolean ||

427− t == C.heytingAlgebraBoolean

428− = Just bool

429− | t == C.eqChar ||

430− t == C.eqString ||

431− t == C.ordChar ||

432− t == C.ordString ||

433− t == C.semigroupString

434− = Just string

435− | otherwise = Nothing

src/CodeGen/IL/Optimizer/MagicDo.hsdeleted−146

@@ -1,146 +0,0 @@

1−-- | This module implements the "Magic Do" optimization, which inlines calls to return

2−-- and bind for the Eff monad, as well as some of its actions.

3−module CodeGen.IL.Optimizer.MagicDo (magicDoEffect, magicDoEff, magicDoST, inlineST) where

4−

5−import Prelude.Compat

6−import Protolude (ordNub)

7−

8−import Data.Maybe (fromJust, isJust)

9−import Data.Text (Text)

10−

11−import Language.PureScript.CoreImp.AST

12−import Language.PureScript.CoreImp.Optimizer.Common hiding (isDict)

13−import Language.PureScript.PSString (PSString, decodeString, mkString)

14−import qualified Language.PureScript.Constants as C

15−

16−import CodeGen.IL.Common (undefinedName, unusedName)

17−import CodeGen.IL.Optimizer.Common

18−

19−-- | Inline type class dictionaries for >>= and return for the Eff monad

20−--

21−-- E.g.

22−--

23−-- Prelude[">>="](dict)(m1)(function(x) {

24−-- return ...;

25−-- })

26−--

27−-- becomes

28−--

29−-- function __do {

30−-- var x = m1();

31−-- ...

32−-- }

33−magicDoEff :: AST -> AST

34−magicDoEff = magicDo C.eff C.effDictionaries

35−

36−magicDoEffect :: AST -> AST

37−magicDoEffect = magicDo C.effect C.effectDictionaries

38−

39−magicDoST :: AST -> AST

40−magicDoST = magicDo C.st C.stDictionaries

41−

42−magicDo :: Text -> C.EffectDictionaries -> AST -> AST

43−magicDo effectModule C.EffectDictionaries{..} = everywhereTopDown convert

44− where

45− -- Desugar monomorphic calls to >>= and return for the Eff monad

46− convert :: AST -> AST

47− -- Desugar pure

48− convert (App _ (App _ pure' [val]) []) | isPure pure' = val

49− -- Desugar discard

50− convert (App _ (App _ bind [m]) [Function s1 Nothing [unused] (Block s2 il)]) | isDiscard bind && unused == unusedName =

51− Function s1 Nothing [] $ Block s2 (App s2 m [] : map applyReturns il )

52− -- Desugar bind

53− convert (App _ (App _ bind [m]) [Function s1 Nothing [arg] (Block s2 il)]) | isBind bind =

54− Function s1 Nothing [] $ Block s2 (VariableIntroduction s2 arg (Just (App s2 m [])) : map applyReturns il)

55− -- Desugar untilE

56− convert (App s1 (App _ f [arg]) []) | isEffFunc edUntil f =

57− App s1 (Function s1 Nothing [] (Block s1 [ While s1 (Unary s1 Not (App s1 arg [])) (Block s1 []), Return s1 $ ObjectLiteral s1 []])) []

58− -- Desugar whileE

59− convert (App _ (App _ (App s1 f [arg1]) [arg2]) []) | isEffFunc edWhile f =

60− App s1 (Function s1 Nothing [] (Block s1 [ While s1 (App s1 arg1 []) (Block s1 [ App s1 arg2 [] ]), Return s1 $ ObjectLiteral s1 []])) []

61− -- -- Inline __do returns

62− -- convert (Return _ (App _ (Function _ (Just ident) [] body) [])) | ident == fnName = body

63− -- Inline double applications

64− convert (App _ (App s1 (Function s2 Nothing [] (Block ss body)) []) []) =

65− App s1 (Function s2 Nothing [] (Block ss (applyReturns `fmap` body))) []

66− convert other = other

67− -- Check if an expression represents a monomorphic call to >>= for the Eff monad

68− isBind (App _ fn [dict]) | isDict (effectModule, edBindDict) dict && isBindPoly fn = True

69− isBind _ = False

70− -- Check if an expression represents a call to @discard@

71− isDiscard (App _ (App _ fn [dict1]) [dict2])

72− | isDict (C.controlBind, C.discardUnitDictionary) dict1 &&

73− isDict (effectModule, edBindDict) dict2 &&

74− isDiscardPoly fn = True

75− isDiscard _ = False

76−

77− -- Check if an expression represents a monomorphic call to pure or return for the Eff applicative

78− isPure (App _ fn [dict]) | isDict (effectModule, edApplicativeDict) dict && isPurePoly fn = True

79− isPure _ = False

80− -- Check if an expression represents the polymorphic >>= function

81− isBindPoly = isDict (C.controlBind, C.bind)

82− -- Check if an expression represents the polymorphic pure function

83− isPurePoly = isDict (C.controlApplicative, C.pure')

84− -- Check if an expression represents the polymorphic discard function

85− isDiscardPoly = isDict (C.controlBind, C.discard)

86− -- Check if an expression represents a function in the Effect module

87− isEffFunc name (Indexer _ (StringLiteral _ name') (Var _ eff)) = eff == effectModule && name == name'

88− isEffFunc _ _ = False

89−

90− applyReturns :: AST -> AST

91− applyReturns (Return ss ret) = Return ss (App ss ret [])

92− applyReturns (Block ss ils) = Block ss (map applyReturns ils)

93− applyReturns (While ss cond il) = While ss cond (applyReturns il)

94− applyReturns (For ss v lo hi il) = For ss v lo hi (applyReturns il)

95− applyReturns (ForIn ss v xs il) = ForIn ss v xs (applyReturns il)

96− applyReturns (IfElse ss cond t f) = IfElse ss cond (applyReturns t) (applyReturns `fmap` f)

97− applyReturns other = other

98−

99−-- | Inline functions in the ST module

100−inlineST :: AST -> AST

101−inlineST = everywhere convertBlock

102− where

103− -- Look for runST blocks and inline the STRefs there.

104− -- If all STRefs are used in the scope of the same runST, only using { read, write, modify }STRef then

105− -- we can be more aggressive about inlining, and actually turn STRefs into local variables.

106− convertBlock (App s1 f [arg]) | isSTFunc C.runST f =

107− let refs = ordNub . findSTRefsIn $ arg

108− usages = findAllSTUsagesIn arg

109− allUsagesAreLocalVars = all (\u -> let v = toVar u in isJust v && fromJust v `elem` refs) usages

110− localVarsDoNotEscape = all (\r -> length (r `appearingIn` arg) == length (filter (\u -> let v = toVar u in v == Just r) usages)) refs

111− in App s1 (everywhere (convert (allUsagesAreLocalVars && localVarsDoNotEscape)) arg) []

112− convertBlock other = other

113− -- Convert a block in a safe way, preserving object wrappers of references,

114− -- or in a more aggressive way, turning wrappers into local variables depending on the

115− -- agg(ressive) parameter.

116− convert agg (App s1 f [arg]) | isSTFunc C.newSTRef f =

117− Function s1 Nothing [] (Block s1 [Return s1 $ if agg then arg else ObjectLiteral s1 [(mkString C.stRefValue, arg)]])

118− convert agg (App _ (App s1 f [ref]) []) | isSTFunc C.readSTRef f =

119− if agg then ref else Indexer s1 (StringLiteral s1 C.stRefValue) ref

120− convert agg (App _ (App _ (App s1 f [arg]) [ref]) []) | isSTFunc C.writeSTRef f =

121− if agg then Assignment s1 ref arg else Assignment s1 (Indexer s1 (StringLiteral s1 C.stRefValue) ref) arg

122− convert agg (App _ (App _ (App s1 f [func]) [ref]) []) | isSTFunc C.modifySTRef f =

123− if agg then Assignment s1 ref (App s1 func [ref]) else Assignment s1 (Indexer s1 (StringLiteral s1 C.stRefValue) ref) (App s1 func [Indexer s1 (StringLiteral s1 C.stRefValue) ref])

124− convert _ other = other

125− -- Check if an expression represents a function in the ST module

126− isSTFunc name (Indexer _ (StringLiteral _ name') (Var _ st)) = st == C.st && name == name'

127− isSTFunc _ _ = False

128− -- Find all ST Refs initialized in this block

129− findSTRefsIn = everything (++) isSTRef

130− where

131− isSTRef (VariableIntroduction _ ident (Just (App _ (App _ f [_]) []))) | isSTFunc C.newSTRef f = [ident]

132− isSTRef _ = []

133− -- Find all STRefs used as arguments to readSTRef, writeSTRef, modifySTRef

134− findAllSTUsagesIn = everything (++) isSTUsage

135− where

136− isSTUsage (App _ (App _ f [ref]) []) | isSTFunc C.readSTRef f = [ref]

137− isSTUsage (App _ (App _ (App _ f [_]) [ref]) []) | isSTFunc C.writeSTRef f || isSTFunc C.modifySTRef f = [ref]

138− isSTUsage _ = []

139− -- Find all uses of a variable

140− appearingIn ref = everything (++) isVar

141− where

142− isVar e@(Var _ v) | v == ref = [e]

143− isVar _ = []

144− -- Convert a AST value to a String if it is a Var

145− toVar (Var _ v) = Just v

146− toVar _ = Nothing

src/CodeGen/IL/Optimizer/TCO.hsdeleted−141

@@ -1,141 +0,0 @@

1−module CodeGen.IL.Optimizer.TCO (tco, tcoLoop) where

2−

3−import Prelude.Compat

4−

5−import Data.Text (Text)

6−import Data.Monoid ((<>))

7−import Language.PureScript.CoreImp.AST

8−import Language.PureScript.AST.SourcePos (SourceSpan)

9−import Safe (headDef, tailSafe)

10−import CodeGen.IL.Common

11−

12−import qualified Language.PureScript.Constants as C

13−

14−tcoLoop :: Text

15−tcoLoop = "ṩtco_loop"

16−

17−tco :: AST -> AST -> AST

18−tco mn = everywhere convert where

19− tcoVar :: Text -> Text

20− tcoVar arg = "ṩtco_var_" <> arg

21−

22− copyVar :: Text -> Text

23− copyVar arg = "ṩcopy_" <> arg

24−

25− tcoDone :: Text

26− tcoDone = "ṩtco_done"

27−

28− tcoResult :: Text

29− tcoResult = "ṩtco_result"

30−

31− convert :: AST -> AST

32− convert fn@(Function ss (Just name) args _)

33− | isTailRecursive name body'

34− = replace (toLoop name outerArgs innerArgs body')

35− where

36− innerArgs = headDef [] argss

37− outerArgs = concat . reverse $ tailSafe argss

38− (argss, body', replace) = collectAllFunctionArgs [] id fn

39− convert (Assignment ss (Var _ name) fn@(Function _ Nothing _ _))

40− | isTailRecursive name body'

41− = Assignment ss (Var ss name) (replace (toLoop name outerArgs innerArgs body'))

42− where

43− innerArgs = headDef [] argss

44− outerArgs = concat . reverse $ tailSafe argss

45− (argss, body', replace) = collectAllFunctionArgs [] id fn

46− convert js = js

47−

48− collectAllFunctionArgs :: [[Text]] -> (AST -> AST) -> AST -> ([[Text]], AST, AST -> AST)

49− collectAllFunctionArgs allArgs f (Function s1 ident args (Block s2 (body@(Return _ _):_))) =

50− collectAllFunctionArgs (args : allArgs) (\b -> f (Function s1 ident (map copyVar args) (Block s2 [b]))) body

51− collectAllFunctionArgs allArgs f (Function ss ident args body@(Block _ _)) =

52− (args : allArgs, body, f . Function ss ident (map copyVar args))

53− collectAllFunctionArgs allArgs f (Return s1 (Function s2 ident args (Block s3 [body]))) =

54− collectAllFunctionArgs (args : allArgs) (\b -> f (Return s1 (Function s2 ident (map copyVar args) (Block s3 [b])))) body

55− collectAllFunctionArgs allArgs f (Return s1 (Function s2 ident args body@(Block _ _))) =

56− (args : allArgs, body, f . Return s1 . Function s2 ident (map copyVar args))

57− collectAllFunctionArgs allArgs f body = (allArgs, body, f)

58−

59− isTailRecursive :: Text -> AST -> Bool

60− isTailRecursive ident js = countSelfReferences js > 0 && allInTailPosition js where

61− countSelfReferences = everything (+) match where

62− match :: AST -> Int

63− match (Var _ ident') | ident == ident' = 1

64− match _ = 0

65−

66− allInTailPosition (Return _ expr)

67− | isSelfCall ident expr = countSelfReferences expr == 1

68− | otherwise = countSelfReferences expr == 0

69− allInTailPosition (While _ js1 body)

70− = countSelfReferences js1 == 0 && allInTailPosition body

71− allInTailPosition (For _ _ js1 js2 body)

72− = countSelfReferences js1 == 0 && countSelfReferences js2 == 0 && allInTailPosition body

73− allInTailPosition (ForIn _ _ js1 body)

74− = countSelfReferences js1 == 0 && allInTailPosition body

75− allInTailPosition (IfElse _ js1 body el)

76− = countSelfReferences js1 == 0 && allInTailPosition body && all allInTailPosition el

77− allInTailPosition (Block _ body)

78− = all allInTailPosition body

79− allInTailPosition (Throw _ js1)

80− = countSelfReferences js1 == 0

81− allInTailPosition (ReturnNoResult _)

82− = True

83− allInTailPosition (VariableIntroduction _ _ js1)

84− = all ((== 0) . countSelfReferences) js1

85− allInTailPosition (Assignment _ _ js1)

86− = countSelfReferences js1 == 0

87− allInTailPosition (Comment _ _ js1)

88− = allInTailPosition js1

89− allInTailPosition _

90− = False

91−

92− toLoop :: Text -> [Text] -> [Text] -> AST -> AST

93− toLoop ident outerArgs innerArgs js =

94− Block rootSS $

95− concatMap (\arg -> [ VariableIntroduction rootSS (tcoVar arg) . Just $

96− Var rootSS (copyVar arg) ]) (outerArgs ++ innerArgs) ++

97− [ Assignment rootSS (Var rootSS $ "var " <> tcoDone) $ BooleanLiteral Nothing False

98− , VariableIntroduction rootSS tcoResult Nothing

99− , Assignment rootSS (Var rootSS $ "var " <> tcoLoop) (Function rootSS (Just tcoLoop) (outerArgs ++ innerArgs) (Block rootSS [loopify js]))

100− , While rootSS (Unary Nothing Not (Var rootSS tcoDone))

101− (Block rootSS

102− [(Assignment rootSS (Var rootSS tcoResult) (App rootSS (Var rootSS tcoLoop) ((map (Var rootSS . tcoVar) outerArgs) ++ (map (Var rootSS . copyVar) innerArgs))))])

103− , Return rootSS (Var rootSS tcoResult)

104− ]

105− where

106− rootSS = Nothing

107−

108− loopify :: AST -> AST

109− loopify (Return ss ret)

110− | isSelfCall ident ret =

111− let

112− allArgumentValues = concat $ collectArgs [] ret

113− in

114− Block ss $

115− zipWith (\val arg ->

116− Assignment ss (Var ss (tcoVar arg)) val) allArgumentValues outerArgs

117− ++ zipWith (\val arg ->

118− Assignment ss (Var ss (copyVar arg)) val) (drop (length outerArgs) allArgumentValues) innerArgs

119− ++ [ ReturnNoResult ss ]

120− | otherwise = Block ss [ markDone ss, Return ss ret ]

121− loopify (ReturnNoResult ss) = Block ss [ markDone ss, ReturnNoResult ss ]

122− loopify (While ss cond body) = While ss cond (loopify body)

123− loopify (For ss i js1 js2 body) = For ss i js1 js2 (loopify body)

124− loopify (ForIn ss i js1 body) = ForIn ss i js1 (loopify body)

125− loopify (IfElse ss cond body el) = IfElse ss cond (loopify body) (fmap loopify el)

126− loopify (Block ss body) = Block ss (map loopify body)

127− loopify other = other

128−

129− markDone :: Maybe SourceSpan -> AST

130− markDone ss = Assignment ss (Var ss tcoDone) (BooleanLiteral ss True)

131−

132− collectArgs :: [[AST]] -> AST -> [[AST]]

133− collectArgs acc (App _ fn args') = collectArgs (args' : acc) fn

134− collectArgs acc _ = acc

135−

136− isSelfCall :: Text -> AST -> Bool

137− isSelfCall ident (App _ (Var _ ident') _) = ident == ident'

138− isSelfCall ident (App _ (Indexer _ (Var _ ident') (Var _ mn')) _) = mn' == "" && ident == ident'

139− isSelfCall ident (App _ (Indexer _ (Var _ ident') mn') _) = mn' == mn && ident == ident'

140− isSelfCall ident (App _ fn _) = isSelfCall ident fn

141− isSelfCall _ _ = False

src/CodeGen/IL/Printer.hsdeleted−527

@@ -1,527 +0,0 @@

1−-- | Pretty printer for the AST

2−module CodeGen.IL.Printer

3− ( prettyPrintIL

4− , prettyPrintIL1

5− , prettyPrintILWithSourceMaps

6− , interfaceSource

7− , implHeaderSource

8− , implFooterSource

9− , isLiteral

10− , modLabel

11− , modPrefix

12− , ffiLoader

13− ) where

14−

15−import Prelude.Compat

16−

17−import Control.Arrow ((<+>))

18−import Control.Monad (forM, mzero)

19−import Control.Monad.State (StateT, evalStateT)

20−import Control.PatternArrows

21−import Data.List (filter, (\\))

22−import qualified Control.Arrow as A

23−

24−import Data.Maybe (fromMaybe)

25−import Data.Monoid ((<>))

26−import Data.Text (Text)

27−import qualified Data.Text as T

28−

29−import Language.PureScript.AST (SourceSpan(..))

30−import Language.PureScript.CoreImp.AST

31−import Language.PureScript.Comments

32−import Language.PureScript.Crash

33−import Language.PureScript.Names (Ident, runIdent)

34−import Language.PureScript.Pretty.Common

35−import Language.PureScript.PSString (PSString, decodeString, mkString)

36−

37−import CodeGen.IL.Common

38−import CodeGen.IL.Optimizer.TCO (tcoLoop)

39−

40−import qualified Language.PureScript.Constants as C

41−

42−-- TODO (Christoph): Get rid of T.unpack / pack

43−

44−literals :: (Emit gen) => Pattern PrinterState AST gen

45−literals = mkPattern' match'

46− where

47− match' :: (Emit gen) => AST -> StateT PrinterState Maybe gen

48− match' il = (addMapping' (getSourceSpan il) <>) <$> match il

49−

50− match :: (Emit gen) => AST -> StateT PrinterState Maybe gen

51− match (NumericLiteral _ n) = return $ emit $ T.pack $ either show show n

52− match (StringLiteral _ s) = return $ emit $ stringLiteral s

53− match (BooleanLiteral _ True) = return $ emit "true"

54− match (BooleanLiteral _ False) = return $ emit "false"

55− match (ArrayLiteral _ xs) = mconcat <$> sequence

56− [ return . emit $ arrayType <> "{"

57− , intercalate (emit ", ") <$> forM xs prettyPrintIL'

58− , return $ emit "}"

59− ]

60− -- match (ObjectLiteral _ []) = return $ emit "std::initializer_list<std::pair<const string, boxed>>{}"

61− match (ObjectLiteral _ ps) = mconcat <$> sequence

62− [ return . emit $ dictType <> "{"

63− , withIndent $ do

64− ils <- forM ps $ \(key, value) -> do

65− value' <- prettyPrintIL' value

66− return $ objectPropertyToString key <> value'

67− return $ intercalate (emit " ") $ map (<> emit ",") ils

68− , return $ emit "}"

69− ]

70− where

71− objectPropertyToString :: (Emit gen) => PSString -> gen

72− objectPropertyToString s = emit $ stringLiteral s <> ": "

73− match (Block _ sts) = mconcat <$> sequence

74− [ return $ emit "{\n"

75− , withIndent $ prettyStatements sts

76− , return $ emit "\n"

77− , currentIndent

78− , return $ emit "}"

79− ]

80− match (Var _ ident) | ident == C.undefined = return $ emit undefinedName

81− match (Var _ ident) = return $ emit ident

82− match (VariableIntroduction _ ident value) = mconcat <$> sequence

83− [ return . emit $ varDecl <> " " <> ident <> " " <> anyType

84− , maybe (return mempty) (fmap (emit " = " <>) . prettyPrintIL') value

85− ]

86− match (Assignment _ target value) = mconcat <$> sequence

87− [ prettyPrintIL' target

88− , return $ emit " = "

89− , prettyPrintIL' value

90− ]

91− match (App _ val []) = mconcat <$> sequence

92− [ return $ emit "Run("

93− , prettyPrintIL' val

94− , return $ emit ")"

95− ]

96− match (App _ (StringLiteral _ u) [arg])

97− | Just ty <- decodeString u = mconcat <$> sequence

98− [ prettyPrintIL' arg

99− , return $ emit ".("

100− , return $ emit ty

101− , return $ emit ")"

102− ]

103− match (App _ (Var _ fn) [arg]) | fn == arrayLengthFn = mconcat <$> sequence

104− [ return $ emit fn

105− , return $ emit "("

106− , prettyPrintIL' arg

107− , return $ emit ")"

108− ]

109− match (App _ (Var _ fn) args) | fn == indexFn = mconcat <$> sequence

110− [ return $ emit fn

111− , return $ emit "("

112− , intercalate (emit ", ") <$> forM args prettyPrintIL'

113− , return $ emit ")"

114− ]

115− match (App _ (Var _ fn) args) | fn == tcoLoop = mconcat <$> sequence

116− [ return $ emit fn

117− , return $ emit "("

118− , intercalate (emit ", ") <$> forM args prettyPrintIL'

119− , return $ emit ")"

120− ]

121− match (App _ (App Nothing (StringLiteral Nothing fnx) [fn@Function{}]) args)

122− | Just ftype <- decodeString fnx

123− , "Fn" `T.isPrefixOf` ftype = mconcat <$> sequence

124− [ prettyPrintIL' fn

125− , return $ emit "("

126− , intercalate (emit ", ") <$> forM args prettyPrintIL'

127− , return $ emit ")"

128− ]

129− match (App _ (App Nothing (StringLiteral Nothing fnx) [fn]) args)

130− | Just ftype <- decodeString fnx

131− , "Fn" `T.isPrefixOf` ftype = mconcat <$> sequence

132− [ prettyPrintIL' fn

133− , return $ emit ".("

134− , return $ emit ftype

135− , return $ emit ")("

136− , intercalate (emit ", ") <$> forM args prettyPrintIL'

137− , return $ emit ")"

138− ]

139− match app@(App{})

140− | (val, args) <- unApp app []

141− , length args > 1

142− = mconcat <$> sequence

143− [ return $ emit "Apply("

144− , prettyPrintIL' val

145− , return $ emit ", "

146− , intercalate (emit ", ") <$> forM args prettyPrintIL'

147− , return $ emit ")"

148− ]

149− match (App _ val args) = mconcat <$> sequence

150− [ return $ emit "Apply("

151− , prettyPrintIL' val

152− , return $ emit ", "

153− , intercalate (emit ", ") <$> forM args prettyPrintIL'

154− , return $ emit ")"

155− ]

156− match (Function _ (Just name) [] (Block _ [Return _ ret]))

157− | isComplexLiteral ret = mconcat <$> sequence

158− [ return $ emit "\n"

159− , return . emit $ varDecl <> " " <> initName name <> " Once\n"

160− , prettyPrintIL' $ VariableIntroduction Nothing (valueName name) Nothing

161− , return $ emit "\n\n"

162− , return $ emit "func "

163− , return . emit $ withPrefix name

164− , return . emit $ "() " <> anyType <> " "

165− , return $ emit "{\n"

166− , withIndent $ do

167− indentString <- currentIndent

168− return $ indentString <> (emit $ initName name <> ".Do(func() {\n") <>

169− indentString <> indentString <> (emit $ valueName name <> " = ")

170− , withIndent $ do

171− case ret of

172− Function _ Nothing args body -> mconcat <$> sequence

173− [ return $ emit "func("

174− , return . emit $ intercalate ", " (renderArg anyType <$> args)

175− , return . emit $ ") " <> anyType <> " "

176− , prettyPrintIL' body

177− ]

178− _ -> do

179− prettyPrintIL' ret

180− , return $ emit "\n"

181− , withIndent $ do

182− indentString <- currentIndent

183− return $ indentString <> (emit $ "})\n" <> "return " <> valueName name <>"\n")

184− , return $ emit "}\n\n"

185− ]

186− match (Function _ (Just name) [] ret) = mconcat <$> sequence

187− [ return $ emit "func "

188− , return . emit $ withPrefix name

189− , return . emit $ "() " <> anyType <> " "

190− , prettyPrintIL' ret

191− ]

192− match (Function _ _ args ret) = mconcat <$> sequence

193− [ return $ emit "func("

194− , return . emit $ intercalate ", " (renderArg anyType <$> args)

195− , return . emit $ ") " <> anyType <> " "

196− , prettyPrintIL' ret

197− ]

198− match (Indexer _ (Var _ name) (Var _ "")) = mconcat <$> sequence

199− [ prettyPrintIL' (Var Nothing $ withPrefix name)

200− , return $ emit "()"

201− ]

202− match (Indexer _ (Var _ name) val) = mconcat <$> sequence

203− [ prettyPrintIL' val

204− , return $ emit "."

205− , prettyPrintIL' (Var Nothing $ withPrefix name)

206− , return $ emit "()"

207− ]

208− match (Indexer _ prop@StringLiteral{} val@ObjectLiteral{}) = mconcat <$> sequence

209− [ prettyPrintIL' val

210− , return $ emit "["

211− , prettyPrintIL' prop

212− , return $ emit "]"

213− ]

214− match (Indexer _ prop@StringLiteral{} val) = mconcat <$> sequence

215− [ prettyPrintIL' val

216− , return $ emit ".("

217− , return $ emit dictType

218− , return $ emit ")["

219− , prettyPrintIL' prop

220− , return $ emit "]"

221− ]

222− match (Indexer _ index val@ArrayLiteral{}) = mconcat <$> sequence

223− [ prettyPrintIL' val

224− , return $ emit "["

225− , prettyPrintIL' index

226− , return $ emit "]"

227− ]

228− match (Indexer _ index val) = mconcat <$> sequence

229− [ prettyPrintIL' val

230− , return $ emit ".("

231− , return $ emit arrayType

232− , return $ emit ")["

233− , prettyPrintIL' index

234− , return $ emit "]"

235− ]

236− match (InstanceOf _ val ty) = mconcat <$> sequence

237− [ return $ emit "Is("

238− , prettyPrintIL' val

239− , return $ emit ", "

240− , prettyPrintIL' ty

241− , return $ emit ")"

242− ]

243− match (While _ cond sts) = mconcat <$> sequence

244− [ return $ emit "for "

245− , prettyPrintIL' cond

246− , return $ emit " "

247− , prettyPrintIL' sts

248− ]

249− match (For _ ident start end sts) = mconcat <$> sequence

250− [ return $ emit $ "for var " <> ident <> " = "

251− , prettyPrintIL' start

252− , return $ emit $ "; " <> ident <> " < "

253− , prettyPrintIL' end

254− , return $ emit $ "; " <> ident <> "++ "

255− , prettyPrintIL' sts

256− ]

257− match (ForIn _ ident obj sts) = mconcat <$> sequence

258− [ return $ emit $ "for var " <> ident <> " in "

259− , prettyPrintIL' obj

260− , return $ emit " "

261− , prettyPrintIL' sts

262− ]

263− match (IfElse _ (Binary _ EqualTo cond@Binary{} (BooleanLiteral Nothing True)) thens elses) = mconcat <$> sequence

264− [ return $ emit "if "

265− , prettyPrintIL' cond

266− , return $ emit " "

267− , prettyPrintIL' thens

268− , maybe (return mempty) (fmap (emit " else " <>) . prettyPrintIL') elses

269− ]

270− match (IfElse _ (Binary _ EqualTo cond@Binary{} (BooleanLiteral Nothing False)) thens elses) = mconcat <$> sequence

271− [ return $ emit "if !("

272− , prettyPrintIL' cond

273− , return $ emit ") "

274− , prettyPrintIL' thens

275− , maybe (return mempty) (fmap (emit " else " <>) . prettyPrintIL') elses

276− ]

277− match (IfElse _ cond thens elses) = mconcat <$> sequence

278− [ return $ emit "if "

279− , prettyPrintIL' cond

280− , return $ emit " "

281− , prettyPrintIL' thens

282− , maybe (return mempty) (fmap (emit " else " <>) . prettyPrintIL') elses

283− ]

284− match (Return _ value) = mconcat <$> sequence

285− [ return $ emit "return "

286− , prettyPrintIL' value

287− ]

288− match (ReturnNoResult _) = return . emit $ "return " <> undefinedName

289− -- match (Throw _ _) = return mempty

290− match (Throw _ value) = mconcat <$> sequence

291− [ return $ emit "panic("

292− , prettyPrintIL' value

293− , return $ emit ")"

294− ]

295− match (Comment _ com il) = mconcat <$> sequence

296− [ return $ emit "\n"

297− , mconcat <$> forM com comment

298− , prettyPrintIL' il

299− ]

300− match _ = mzero

301−

302− comment :: (Emit gen) => Comment -> StateT PrinterState Maybe gen

303− comment (LineComment com) = fmap mconcat $ sequence $

304− [ currentIndent

305− , return $ emit "//" <> emit com <> emit "\n"

306− ]

307− comment (BlockComment com) = fmap mconcat $ sequence $

308− [ currentIndent

309− , return $ emit "/**\n"

310− ] ++

311− map asLine (T.lines com) ++

312− [ currentIndent

313− , return $ emit " */\n"

314− , currentIndent

315− ]

316− where

317− asLine :: (Emit gen) => Text -> StateT PrinterState Maybe gen

318− asLine s = do

319− i <- currentIndent

320− return $ i <> emit " * " <> (emit . removeComments) s <> emit "\n"

321−

322− removeComments :: Text -> Text

323− removeComments t =

324− case T.stripPrefix "*/" t of

325− Just rest -> removeComments rest

326− Nothing -> case T.uncons t of

327− Just (x, xs) -> x `T.cons` removeComments xs

328− Nothing -> ""

329−

330−unary' :: (Emit gen) => UnaryOperator -> (AST -> Text) -> Operator PrinterState AST gen

331−unary' op mkStr = Wrap match (<>)

332− where

333− match :: (Emit gen) => Pattern PrinterState AST (gen, AST)

334− match = mkPattern match'

335− where

336− match' (Unary _ op' val) | op' == op = Just (emit $ mkStr val, val)

337− match' _ = Nothing

338−

339−unary :: (Emit gen) => UnaryOperator -> Text -> Operator PrinterState AST gen

340−unary op str = unary' op (const str)

341−

342−negateOperator :: (Emit gen) => Operator PrinterState AST gen

343−negateOperator = unary' Negate (\v -> if isNegate v then "- " else "-")

344− where

345− isNegate (Unary _ Negate _) = True

346− isNegate _ = False

347−

348−binary :: (Emit gen) => BinaryOperator -> Text -> Operator PrinterState AST gen

349−binary op str = AssocL match (\v1 v2 -> v1 <> emit (" " <> str <> " ") <> v2)

350− where

351− match :: Pattern PrinterState AST (AST, AST)

352− match = mkPattern match'

353− where

354− match' (Binary _ op' v1 v2) | op' == op = Just (v1, v2)

355− match' _ = Nothing

356−

357−isLiteral :: AST -> Bool

358−isLiteral Function{} = True

359−isLiteral NumericLiteral{} = True

360−isLiteral StringLiteral{} = True

361−isLiteral BooleanLiteral{} = True

362−isLiteral ObjectLiteral{} = True

363−isLiteral ArrayLiteral{} = True

364−isLiteral _ = False

365−

366−isComplexLiteral :: AST -> Bool

367−-- isComplexLiteral Function{} = True

368−isComplexLiteral ObjectLiteral{} = True

369−isComplexLiteral ArrayLiteral{} = True

370−isComplexLiteral _ = False

371−

372−unApp :: AST -> [AST] -> (AST, [AST])

373−unApp (App _ val [arg]) args = unApp val (arg : args)

374−unApp other args = (other, args)

375−

376−prettyStatements :: (Emit gen) => [AST] -> StateT PrinterState Maybe gen

377−prettyStatements sts = do

378− ils <- forM sts prettyPrintIL'

379− indentString <- currentIndent

380− return $ intercalate (emit "\n") $ map (indentString <>) ils

381−

382−-- | Generate a pretty-printed string representing a collection of C++ expressions at the same indentation level

383−prettyPrintILWithSourceMaps :: [AST] -> (Text, [SMap])

384−prettyPrintILWithSourceMaps il =

385− let StrPos (_, s, mp) = (fromMaybe (internalError "Incomplete pattern") . flip evalStateT (PrinterState 0) . prettyStatements) il

386− in (s, mp)

387−

388−prettyPrintIL :: [AST] -> Text

389−prettyPrintIL = maybe (internalError "Incomplete pattern") runPlainString . flip evalStateT (PrinterState 0) . prettyStatements

390−

391−-- | Generate an indented, pretty-printed string representing a C++ expression

392−prettyPrintIL' :: (Emit gen) => AST -> StateT PrinterState Maybe gen

393−prettyPrintIL' = A.runKleisli $ runPattern matchValue

394− where

395− matchValue :: (Emit gen) => Pattern PrinterState AST gen

396− matchValue = buildPrettyPrinter operators (literals <+> fmap parensPos matchValue)

397− operators :: (Emit gen) => OperatorTable PrinterState AST gen

398− operators =

399− OperatorTable [ [ unary New "?" ]

400− , [ unary Not "!"

401− , unary BitwiseNot "~"

402− , unary Positive "+"

403− , negateOperator ]

404− , [ binary Multiply "*"

405− , binary Divide "/"

406− , binary Modulus "%" ]

407− , [ binary Add "+"

408− , binary Subtract "-" ]

409− , [ binary ShiftLeft "<<"

410− , binary ShiftRight ">>" ]

411− , [ binary LessThan "<"

412− , binary LessThanOrEqualTo "<="

413− , binary GreaterThan ">"

414− , binary GreaterThanOrEqualTo ">=" ]

415− , [ binary EqualTo "=="

416− , binary NotEqualTo "!=" ]

417− , [ binary BitwiseAnd "&" ]

418− , [ binary BitwiseXor "^" ]

419− , [ binary BitwiseOr "|" ]

420− , [ binary And "&&" ]

421− , [ binary Or "||" ]

422− ]

423−

424−prettyPrintIL1 :: AST -> Text

425−prettyPrintIL1 = maybe (internalError "Incomplete pattern") runPlainString . flip evalStateT (PrinterState 0) . prettyPrintIL'

426−

427−stringLiteral :: PSString -> Text

428−stringLiteral pss | Just s <- decodeString pss = stringLiteral' s

429− where

430− stringLiteral' :: Text -> Text

431− stringLiteral' s = "\"" <> T.concatMap encodeChar s <> "\""

432− encodeChar :: Char -> Text

433− encodeChar '\0' = "\\x00"

434− encodeChar '\b' = "\\b"

435− encodeChar '\t' = "\\t"

436− encodeChar '\n' = "\\n"

437− encodeChar '\v' = "\\v"

438− encodeChar '\f' = "\\f"

439− encodeChar '\r' = "\\r"

440− encodeChar '"' = "\\\""

441− encodeChar '\\' = "\\\\"

442− encodeChar c = T.singleton $ c

443−stringLiteral _ = "\"\\uFFFD\""

444−

445−interfaceSource :: Text -> [(Text,Bool)] -> [Ident] -> Text

446−interfaceSource _ _ _ = ""

447−

448−implHeaderSource :: Text -> [Text] -> Text -> Text

449−implHeaderSource mn imports otherPrefix =

450− "// Code generated by psgo. DO NOT EDIT.\n\n" <>

451− "package " <> (if mn == "Main" || mn == "Test_Main" then "main" else mn) <> "\n\n" <>

452− "import . \"" <> runtime <> "\"\n" <>

453− (if mn == "Main" || mn == "Test_Main"

454− then "import _ \"" <> otherPrefix <> "/" <> ffiLoader <> "\"\n"

455− else "\n") <>

456− "import (\n" <>

457− (T.concat $ formatImport <$> imports) <> ")\n\n" <>

458− "type _ = Any\n\n"

459− where

460− formatImport :: Text -> Text

461− formatImport s =

462− "\t\"" <> otherPrefix <> "/" <> modPrefix <> "/" <> moduleRenamer s <> "\"\n"

463− moduleRenamer :: Text -> Text

464− moduleRenamer s

465− | (s', sfx) <- T.breakOn moduleRenamerMarker s,

466− not $ T.null sfx = s'

467− moduleRenamer s = s

468−

469−implFooterSource :: Text -> [Ident] -> Text

470−implFooterSource mn foreigns =

471− "\n\n\n" <>

472− (if null foreigns

473− then ""

474− else ("// Foreign values\n\n" <>

475− "var " <> foreignDict <> " = "<> foreignMod <> "(\"" <> mn <> "\")\n\n" <>

476− (T.concat $ (\foreign' ->

477− let name = moduleIdentToIL foreign' in

478− varDecl <> " " <> initName name <> " Once\n" <>

479− varDecl <> " " <> valueName name <> " " <> anyType <> "\n\n" <>

480− "func " <>

481− withPrefix name <>

482− "() Any { \n" <>

483− " " <> initName name <> ".Do(func() {\n" <>

484− " " <> valueName name <> " = " <>

485− "Get(" <> foreignDict <> ", " <>

486− (stringLiteral . mkString $ runIdent foreign') <> ")\n" <>

487− " })\n" <>

488− " return " <> valueName name <> "\n" <>

489− "}\n\n") <$> foreigns))) <>

490− if mn == "Main" || mn == "Test.Main" then mainSource else "\n"

491− where

492− mainSource :: Text

493− mainSource = "\

494− \func main() {\n\

495− \ Run(Ꞌmain())\n\

496− \}\n\n\

497− \"

498−

499−varDecl :: Text

500−varDecl = "var"

501−

502−renderArg :: Text -> Text -> Text

503−renderArg decl arg = arg <> " " <> decl

504−

505−foreignMod :: Text

506−foreignMod = "Foreign"

507−

508−foreignDict :: Text

509−foreignDict = "foreign"

510−

511−modLabel :: Text

512−modLabel = "purescript-native"

513−

514−modPrefix :: Text

515−modPrefix = modLabel <> "/output"

516−

517−runtime :: Text

518−runtime = "github.com/" <> modLabel <> "/go-runtime"

519−

520−ffiLoader :: Text

521−ffiLoader = modLabel <> "/ffi-loader"

522−

523−initName :: Text -> Text

524−initName s = "ᛌ" <> s <> "_once"

525−

526−valueName :: Text -> Text

527−valueName s = "ᛧ" <> s

src/Data/Generics/Extras.hsnew file+24

@@ -0,0 +1,24 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Data.Generics.Extras

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE Rank2Types #-}

16+

17+module Data.Generics.Extras where

18+

19+import Data.Data

20+

21+everywhereM' :: (Monad m, Data d) => (forall d. (Data d) => d -> m d) -> d -> m d

22+everywhereM' f x = do

23+ y <- f x

24+ gmapM (everywhereM' f) y

src/Language/PureScript.hsnew file+38

@@ -0,0 +1,38 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript (module P, compile) where

16+

17+import Language.PureScript.Values as P

18+import Language.PureScript.Types as P

19+import Language.PureScript.Kinds as P

20+import Language.PureScript.Declarations as P

21+import Language.PureScript.Names as P

22+import Language.PureScript.Parser as P

23+import Language.PureScript.CodeGen as P

24+import Language.PureScript.TypeChecker as P

25+import Language.PureScript.Pretty as P

26+import Language.PureScript.Optimize as P

27+import Language.PureScript.Operators as P

28+

29+import Data.List (intercalate)

30+import Data.Maybe (mapMaybe)

31+

32+compile :: [Declaration] -> Either String (String, String, Environment)

33+compile decls = do

34+ bracketted <- rebracket decls

35+ (_, env) <- runCheck (typeCheckAll bracketted)

36+ let js = prettyPrintJS . map optimize . concat . mapMaybe (\decl -> declToJs Nothing global decl env) $ bracketted

37+ let exts = intercalate "\n" . mapMaybe (externToPs 0 global env) $ bracketted

38+ return (js, exts, env)

src/Language/PureScript/CodeGen.hsnew file+18

@@ -0,0 +1,18 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.CodeGen

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.CodeGen (module C) where

16+

17+import Language.PureScript.CodeGen.JS as C

18+import Language.PureScript.CodeGen.Externs as C

src/Language/PureScript/CodeGen/Externs.hsnew file+42

@@ -0,0 +1,42 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.CodeGen.Externs

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.CodeGen.Externs (

16+ externToPs

17+) where

18+

19+import Data.List (intercalate)

20+import Data.Maybe (mapMaybe)

21+import qualified Data.Map as M

22+import Language.PureScript.Declarations

23+import Language.PureScript.TypeChecker.Monad

24+import Language.PureScript.Pretty

25+import Language.PureScript.Names

26+

27+externToPs :: Int -> ModulePath -> Environment -> Declaration -> Maybe String

28+externToPs indent path env (ValueDeclaration name _) = do

29+ (ty, _) <- M.lookup (path, name) $ names env

30+ return $ replicate indent ' ' ++ "foreign import " ++ show name ++ " :: " ++ prettyPrintType ty

31+externToPs indent path env (DataDeclaration name _ _) = do

32+ (kind, _) <- M.lookup (path, name) $ types env

33+ return $ replicate indent ' ' ++ "foreign import data " ++ show name ++ " :: " ++ prettyPrintKind kind

34+externToPs indent path env (ExternMemberDeclaration member name ty) =

35+ return $ replicate indent ' ' ++ "foreign import member " ++ show member ++ " " ++ show name ++ " :: " ++ prettyPrintType ty

36+externToPs indent path env (ExternDataDeclaration name kind) =

37+ return $ replicate indent ' ' ++ "foreign import data " ++ show name ++ " :: " ++ prettyPrintKind kind

38+externToPs indent path env (TypeSynonymDeclaration name args ty) =

39+ return $ replicate indent ' ' ++ "type " ++ show name ++ " " ++ unwords args ++ " = " ++ prettyPrintType ty

40+externToPs indent path env (ModuleDeclaration name decls) =

41+ return $ replicate indent ' ' ++ "module " ++ show name ++ " where\n" ++ unlines (mapMaybe (externToPs (indent + 2) (subModule path name) env) decls)

42+externToPs _ _ _ _ = Nothing

src/Language/PureScript/CodeGen/JS.hsnew file+175

@@ -0,0 +1,175 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.CodeGen.JS

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.CodeGen.JS (

16+ module AST,

17+ declToJs

18+) where

19+

20+import Data.Char

21+import Data.Maybe (fromMaybe, mapMaybe)

22+import Data.List (intercalate)

23+import qualified Data.Map as M

24+import qualified Control.Arrow as A

25+import Control.Arrow ((<+>), second)

26+import Control.Monad (forM)

27+import Control.Applicative

28+

29+import Language.PureScript.TypeChecker (Environment, names)

30+import Language.PureScript.Types

31+import Language.PureScript.Values

32+import Language.PureScript.Names

33+import Language.PureScript.Declarations

34+import Language.PureScript.Pretty.Common

35+import Language.PureScript.CodeGen.Monad

36+import Language.PureScript.CodeGen.JS.AST as AST

37+

38+declToJs :: Maybe Ident -> ModulePath -> Declaration -> Environment -> Maybe [JS]

39+declToJs mod mp (ValueDeclaration ident (Abs args ret)) _ =

40+ Just $ JSFunction (Just ident) args (JSBlock [JSReturn (valueToJs mp ret)]) :

41+ maybe [] (return . setProperty (identToJs ident) (JSVar ident)) mod

42+declToJs mod mp (ValueDeclaration ident val) _ =

43+ Just $ JSVariableIntroduction ident (Just (valueToJs mp val)) :

44+ maybe [] (return . setProperty (identToJs ident) (JSVar ident)) mod

45+declToJs mod _ (ExternMemberDeclaration member ident _) _ =

46+ Just $ JSFunction (Just ident) [Ident "value"] (JSBlock [JSReturn (JSAccessor member (JSVar (Ident "value")))]) :

47+ maybe [] (return . setProperty (show ident) (JSVar ident)) mod

48+declToJs mod mp (DataDeclaration _ _ ctors) _ =

49+ Just $ flip concatMap ctors $ \(pn@(ProperName ctor), maybeTy) ->

50+ let

51+ ctorJs =

52+ case maybeTy of

53+ Nothing -> JSVariableIntroduction (Ident ctor) (Just (JSObjectLiteral [ ("ctor", JSStringLiteral (show (Qualified mp pn))) ]))

54+ Just _ -> JSFunction (Just (Ident ctor)) [Ident "value"]

55+ (JSBlock [JSReturn

56+ (JSObjectLiteral [ ("ctor", JSStringLiteral (show (Qualified mp pn)))

57+ , ("value", JSVar (Ident "value")) ])])

58+ in ctorJs : maybe [] (return . setProperty ctor (JSVar (Ident ctor))) mod

59+declToJs mod mp (ModuleDeclaration pn@(ProperName name) decls) env =

60+ Just $ [ JSVariableIntroduction (Ident name) Nothing

61+ , JSApp (JSFunction Nothing [Ident name]

62+ (JSBlock (concat $ mapMaybe (\decl -> declToJs (Just (Ident name)) (subModule mp pn) decl env) decls)))

63+ [JSAssignment (JSAssignVariable (Ident name))

64+ (JSBinary Or (JSVar (Ident name)) (JSObjectLiteral []))]] ++

65+ maybe [] (return . setProperty name (JSVar (Ident name))) mod

66+declToJs mod omp (ImportDeclaration mp idents) env =

67+ Just $ case idents of

68+ Nothing ->

69+ let idents = map snd . filter ((== mp) . fst) . M.keys $ names env

70+ in map mkLocal idents

71+ Just idents -> map mkLocal idents

72+ where mkLocal ident = JSVariableIntroduction ident (Just (qualifiedToJS identToJs (Qualified mp ident)))

73+declToJs _ _ _ _ = Nothing

74+

75+setProperty :: String -> JS -> Ident -> JS

76+setProperty prop val mod = JSAssignment (JSAssignProperty prop (JSAssignVariable mod)) val

77+

78+valueToJs :: ModulePath -> Value -> JS

79+valueToJs _ (NumericLiteral n) = JSNumericLiteral n

80+valueToJs _ (StringLiteral s) = JSStringLiteral s

81+valueToJs _ (BooleanLiteral b) = JSBooleanLiteral b

82+valueToJs m (ArrayLiteral xs) = JSArrayLiteral (map (valueToJs m) xs)

83+valueToJs m (ObjectLiteral ps) = JSObjectLiteral (map (second (valueToJs m)) ps)

84+valueToJs m (ObjectUpdate o ps) = JSApp (JSAccessor "extend" (JSVar (Ident "Object"))) [ valueToJs m o, JSObjectLiteral (map (second (valueToJs m)) ps)]

85+valueToJs m (Constructor name) = qualifiedToJS runProperName name

86+valueToJs m (Block sts) = JSApp (JSFunction Nothing [] (JSBlock (map (statementToJs m) sts))) []

87+valueToJs m (Case value binders) = runGen (bindersToJs m binders (valueToJs m value))

88+valueToJs m (IfThenElse cond th el) = JSConditional (valueToJs m cond) (valueToJs m th) (valueToJs m el)

89+valueToJs m (Accessor prop val) = JSAccessor prop (valueToJs m val)

90+valueToJs m (Indexer index val) = JSIndexer (valueToJs m index) (valueToJs m val)

91+valueToJs m (App val args) = JSApp (valueToJs m val) (map (valueToJs m) args)

92+valueToJs m (Abs args val) = JSFunction Nothing args (JSBlock [JSReturn (valueToJs m val)])

93+valueToJs m (Unary op val) = JSUnary op (valueToJs m val)

94+valueToJs m (Binary op v1 v2) = JSBinary op (valueToJs m v1) (valueToJs m v2)

95+valueToJs m (Var ident) = qualifiedToJS identToJs ident

96+valueToJs m (TypedValue val _) = valueToJs m val

97+

98+qualifiedToJS :: (a -> String) -> Qualified a -> JS

99+qualifiedToJS f (Qualified (ModulePath parts) a) =

100+ delimited (f a : reverse (map show parts))

101+ where delimited [part] = JSVar (Ident (part))

102+ delimited (part:parts) = JSAccessor part (delimited parts)

103+

104+bindersToJs :: ModulePath -> [(Binder, Value)] -> JS -> Gen JS

105+bindersToJs m binders val = do

106+ valName <- fresh

107+ jss <- forM binders $ \(binder, result) -> binderToJs m valName [JSReturn (valueToJs m result)] binder

108+ return $ JSApp (JSFunction Nothing [Ident valName] (JSBlock (concat jss ++ [JSThrow (JSStringLiteral "Failed pattern match")])))

109+ [val]

110+

111+binderToJs :: ModulePath -> String -> [JS] -> Binder -> Gen [JS]

112+binderToJs _ varName done NullBinder = return done

113+binderToJs _ varName done (StringBinder str) =

114+ return [JSIfElse (JSBinary EqualTo (JSVar (Ident varName)) (JSStringLiteral str)) (JSBlock done) Nothing]

115+binderToJs _ varName done (NumberBinder num) =

116+ return [JSIfElse (JSBinary EqualTo (JSVar (Ident varName)) (JSNumericLiteral num)) (JSBlock done) Nothing]

117+binderToJs _ varName done (BooleanBinder True) =

118+ return [JSIfElse (JSVar (Ident varName)) (JSBlock done) Nothing]

119+binderToJs _ varName done (BooleanBinder False) =

120+ return [JSIfElse (JSUnary Not (JSVar (Ident varName))) (JSBlock done) Nothing]

121+binderToJs _ varName done (VarBinder ident) =

122+ return (JSVariableIntroduction ident (Just (JSVar (Ident varName))) : done)

123+binderToJs m varName done (NullaryBinder ctor) =

124+ return [JSIfElse (JSBinary EqualTo (JSAccessor "ctor" (JSVar (Ident varName))) (JSStringLiteral (show (uncurry Qualified $ qualify m ctor)))) (JSBlock done) Nothing]

125+binderToJs m varName done (UnaryBinder ctor b) = do

126+ value <- fresh

127+ js <- binderToJs m value done b

128+ return [JSIfElse (JSBinary EqualTo (JSAccessor "ctor" (JSVar (Ident varName))) (JSStringLiteral (show (uncurry Qualified $ qualify m ctor)))) (JSBlock (JSVariableIntroduction (Ident value) (Just (JSAccessor "value" (JSVar (Ident varName)))) : js)) Nothing]

129+binderToJs m varName done (ObjectBinder bs) = go done bs

130+ where

131+ go :: [JS] -> [(String, Binder)] -> Gen [JS]

132+ go done [] = return done

133+ go done ((prop, binder):bs) = do

134+ propVar <- fresh

135+ done' <- go done bs

136+ js <- binderToJs m propVar done' binder

137+ return (JSVariableIntroduction (Ident propVar) (Just (JSAccessor prop (JSVar (Ident varName)))) : js)

138+binderToJs m varName done (ArrayBinder bs rest) = do

139+ js <- go done rest 0 bs

140+ return [JSIfElse (JSBinary cmp (JSAccessor "length" (JSVar (Ident varName))) (JSNumericLiteral (Left (fromIntegral $ length bs)))) (JSBlock js) Nothing]

141+ where

142+ cmp :: BinaryOperator

143+ cmp = maybe EqualTo (const GreaterThanOrEqualTo) rest

144+ go :: [JS] -> Maybe Binder -> Integer -> [Binder] -> Gen [JS]

145+ go done Nothing _ [] = return done

146+ go done (Just binder) index [] = do

147+ restVar <- fresh

148+ js <- binderToJs m restVar done binder

149+ return (JSVariableIntroduction (Ident restVar) (Just (JSApp (JSAccessor "slice" (JSVar (Ident varName))) [JSNumericLiteral (Left index)])) : js)

150+ go done rest index (binder:bs) = do

151+ elVar <- fresh

152+ done' <- go done rest (index + 1) bs

153+ js <- binderToJs m elVar done' binder

154+ return (JSVariableIntroduction (Ident elVar) (Just (JSIndexer (JSNumericLiteral (Left index)) (JSVar (Ident varName)))) : js)

155+binderToJs m varName done (NamedBinder ident binder) = do

156+ js <- binderToJs m varName done binder

157+ return (JSVariableIntroduction ident (Just (JSVar (Ident varName))) : js)

158+binderToJs m varName done (GuardedBinder cond binder) = binderToJs m varName done' binder

159+ where

160+ done' = [JSIfElse (valueToJs m cond) (JSBlock done) Nothing]

161+

162+statementToJs :: ModulePath -> Statement -> JS

163+statementToJs m (VariableIntroduction ident value) = JSVariableIntroduction ident (Just (valueToJs m value))

164+statementToJs m (Assignment target value) = JSAssignment (JSAssignVariable target) (valueToJs m value)

165+statementToJs m (While cond sts) = JSWhile (valueToJs m cond) (JSBlock (map (statementToJs m) sts))

166+statementToJs m (For ident start end sts) = JSFor ident (valueToJs m start) (valueToJs m end) (JSBlock (map (statementToJs m) sts))

167+statementToJs m (ForEach ident arr sts) = JSApp (JSAccessor "forEach" (valueToJs m arr)) [JSFunction Nothing [ident] (JSBlock (map (statementToJs m) sts))]

168+statementToJs m (If ifst) = ifToJs ifst

169+ where

170+ ifToJs :: IfStatement -> JS

171+ ifToJs (IfStatement cond thens elses) = JSIfElse (valueToJs m cond) (JSBlock (map (statementToJs m) thens)) (fmap elseToJs elses)

172+ elseToJs :: ElseStatement -> JS

173+ elseToJs (Else sts) = JSBlock (map (statementToJs m) sts)

174+ elseToJs (ElseIf ifst) = ifToJs ifst

175+statementToJs m (Return value) = JSReturn (valueToJs m value)

src/Language/PureScript/CodeGen/JS/AST.hsnew file+49

@@ -0,0 +1,49 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.CodeGen.JS.AST

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.CodeGen.JS.AST where

18+

19+import Language.PureScript.Names

20+import Language.PureScript.Values

21+

22+import Data.Data

23+

24+data JS

25+ = JSNumericLiteral (Either Integer Double)

26+ | JSStringLiteral String

27+ | JSBooleanLiteral Bool

28+ | JSUnary UnaryOperator JS

29+ | JSBinary BinaryOperator JS JS

30+ | JSArrayLiteral [JS]

31+ | JSIndexer JS JS

32+ | JSObjectLiteral [(String, JS)]

33+ | JSAccessor String JS

34+ | JSFunction (Maybe Ident) [Ident] JS

35+ | JSApp JS [JS]

36+ | JSVar Ident

37+ | JSConditional JS JS JS

38+ | JSBlock [JS]

39+ | JSVariableIntroduction Ident (Maybe JS)

40+ | JSAssignment JSAssignment JS

41+ | JSWhile JS JS

42+ | JSFor Ident JS JS JS

43+ | JSIfElse JS JS (Maybe JS)

44+ | JSReturn JS

45+ | JSThrow JS deriving (Show, Data, Typeable)

46+

47+data JSAssignment

48+ = JSAssignVariable Ident

49+ | JSAssignProperty String JSAssignment deriving (Show, Data, Typeable)

src/Language/PureScript/CodeGen/Monad.hsnew file+31

@@ -0,0 +1,31 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.CodeGen.Monad

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE GeneralizedNewtypeDeriving #-}

16+

17+module Language.PureScript.CodeGen.Monad where

18+

19+import Control.Monad.State

20+import Control.Applicative

21+

22+newtype Gen a = Gen { unGen :: State Int a } deriving (Functor, Applicative, Monad, MonadState Int)

23+

24+runGen :: Gen a -> a

25+runGen = flip evalState 0 . unGen

26+

27+fresh :: Gen String

28+fresh = do

29+ n <- get

30+ modify (+ 1)

31+ return $ '_' : show n

src/Language/PureScript/Declarations.hsnew file+43

@@ -0,0 +1,43 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Declarations

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.Declarations where

18+

19+import Language.PureScript.Values

20+import Language.PureScript.Types

21+import Language.PureScript.Names

22+import Language.PureScript.Kinds

23+

24+import qualified Data.Data as D

25+

26+type Precedence = Integer

27+

28+data Associativity = Infixl | Infixr deriving (Show, D.Data, D.Typeable)

29+

30+data Fixity = Fixity Associativity Precedence deriving (Show, D.Data, D.Typeable)

31+

32+data Declaration

33+ = DataDeclaration ProperName [String] [(ProperName, Maybe Type)]

34+ | TypeSynonymDeclaration ProperName [String] Type

35+ | TypeDeclaration Ident PolyType

36+ | ValueDeclaration Ident Value

37+ | ExternDeclaration Ident PolyType

38+ | ExternMemberDeclaration String Ident PolyType

39+ | ExternDataDeclaration ProperName Kind

40+ | FixityDeclaration Fixity String

41+ | ModuleDeclaration ProperName [Declaration]

42+ | ImportDeclaration ModulePath (Maybe [Ident])

43+ deriving (Show, D.Data, D.Typeable)

src/Language/PureScript/Kinds.hsnew file+26

@@ -0,0 +1,26 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Kinds

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.Kinds where

18+

19+import Data.Data

20+import Language.PureScript.Unknown

21+

22+data Kind

23+ = KUnknown (Unknown Kind)

24+ | Star

25+ | Row

26+ | FunKind Kind Kind deriving (Show, Eq, Data, Typeable)

src/Language/PureScript/Names.hsnew file+51

@@ -0,0 +1,51 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Names

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.Names where

18+

19+import Data.Data

20+import Data.List (intercalate)

21+

22+data Ident = Ident String | Op String deriving (Eq, Ord, Data, Typeable)

23+

24+instance Show Ident where

25+ show (Ident s) = s

26+ show (Op op) = '(':op ++ ")"

27+

28+newtype ProperName = ProperName { runProperName :: String } deriving (Eq, Ord, Data, Typeable)

29+

30+instance Show ProperName where

31+ show = runProperName

32+

33+data ModulePath = ModulePath [ProperName] deriving (Eq, Ord, Data, Typeable)

34+

35+instance Show ModulePath where

36+ show (ModulePath segments) = intercalate "." $ map show segments

37+

38+subModule :: ModulePath -> ProperName -> ModulePath

39+subModule (ModulePath mp) name = ModulePath (mp ++ [name])

40+

41+global :: ModulePath

42+global = ModulePath []

43+

44+data Qualified a = Qualified ModulePath a deriving (Eq, Ord, Data, Typeable)

45+

46+instance (Show a) => Show (Qualified a) where

47+ show (Qualified (ModulePath names) a) = intercalate ":" (map show names ++ [show a])

48+

49+qualify :: ModulePath -> Qualified a -> (ModulePath, a)

50+qualify mp (Qualified (ModulePath []) a) = (mp, a)

51+qualify _ (Qualified mp a) = (mp, a)

src/Language/PureScript/Operators.hsnew file+129

@@ -0,0 +1,129 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Operators

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE Rank2Types #-}

16+

17+module Language.PureScript.Operators (

18+ rebracket

19+) where

20+

21+import Language.PureScript.Names

22+import Language.PureScript.Declarations

23+import Language.PureScript.Values

24+

25+import qualified Data.Data as D

26+import Data.Function (on)

27+import Data.List (groupBy, sortBy)

28+import qualified Data.Map as M

29+import qualified Data.Generics as G

30+import qualified Data.Generics.Extras as G

31+import Control.Monad.State

32+import Control.Applicative

33+import qualified Text.Parsec as P

34+import qualified Text.Parsec.Pos as P

35+import qualified Text.Parsec.Expr as P

36+

37+rebracket :: [Declaration] -> Either String [Declaration]

38+rebracket ds = do

39+ m <- collectFixities ds

40+ let opTable = customOperatorTable m

41+ ds' <- G.everywhereM' (G.mkM (matchOperators opTable)) ds

42+ return $ G.everywhere (G.mkT removeParens) ds'

43+

44+removeParens :: Value -> Value

45+removeParens (Parens val) = val

46+removeParens val = val

47+

48+customOperatorTable :: M.Map (Qualified Ident) Fixity -> [[(Qualified Ident, Value -> Value -> Value, Associativity)]]

49+customOperatorTable fixities =

50+ let

51+ applyUserOp name t1 t2 = App (App (Var name) [t1]) [t2]

52+ userOps = map (\(name, Fixity a p) -> (name, applyUserOp name, p, a)) . M.toList $ fixities

53+ sorted = sortBy (compare `on` (\(_, _, p, _) -> p)) (userOps ++ builtIns)

54+ groups = groupBy ((==) `on` (\(_, _, p, _) -> p)) sorted

55+ in

56+ map (map (\(name, f, _, a) -> (name, f, a))) groups

57+

58+type Chain = [Either Value (Qualified Ident)]

59+

60+matchOperators :: [[(Qualified Ident, Value -> Value -> Value, Associativity)]] -> Value -> Either String Value

61+matchOperators ops val = G.everywhereM' (G.mkM parseChains) val

62+ where

63+ parseChains :: Value -> Either String Value

64+ parseChains b@(BinaryNoParens _ _ _) = bracketChain (extendChain b)

65+ parseChains val = return val

66+ extendChain :: Value -> Chain

67+ extendChain (BinaryNoParens name l r) = Left l : Right name : extendChain r

68+ extendChain val = [Left val]

69+ bracketChain :: Chain -> Either String Value

70+ bracketChain = either (Left . show) Right . P.parse (P.buildExpressionParser opTable parseValue <* P.eof) "operator expression"

71+ opTable = map (map (\(name, f, a) -> P.Infix (P.try (matchOp name) >> return f) (toAssoc a))) ops

72+ ++ [[P.Infix (P.try (parseOp >>= \ident -> return (\t1 t2 -> App (App (Var ident) [t1]) [t2]))) P.AssocLeft]]

73+

74+toAssoc :: Associativity -> P.Assoc

75+toAssoc Infixl = P.AssocLeft

76+toAssoc Infixr = P.AssocRight

77+

78+parseValue :: P.Parsec Chain () Value

79+parseValue = P.token show (const (P.initialPos "")) (either Just (const Nothing)) P.<?> "expression"

80+

81+parseOp :: P.Parsec Chain () (Qualified Ident)

82+parseOp = P.token show (const (P.initialPos "")) (either (const Nothing) Just) P.<?> "operator"

83+

84+matchOp :: Qualified Ident -> P.Parsec Chain () ()

85+matchOp op = do

86+ ident <- parseOp

87+ guard (ident == op)

88+

89+collectFixities :: [Declaration] -> Either String (M.Map (Qualified Ident) Fixity)

90+collectFixities = go M.empty global

91+ where

92+ go :: M.Map (Qualified Ident) Fixity -> ModulePath -> [Declaration] -> Either String (M.Map (Qualified Ident) Fixity)

93+ go m _ [] = return m

94+ go m p (FixityDeclaration fixity name : rest) = do

95+ let qual = Qualified p (Op name)

96+ when (qual `M.member` m) (Left $ "redefined fixity for " ++ show name)

97+ go (M.insert qual fixity m) p rest

98+ go m p (ModuleDeclaration name decls : rest) = do

99+ m' <- go m (subModule p name) decls

100+ go m' p rest

101+ go m p (_:ds) = go m p ds

102+

103+globalOp :: String -> Qualified Ident

104+globalOp = Qualified global . Op

105+

106+builtIns :: [(Qualified Ident, Value -> Value -> Value, Precedence, Associativity)]

107+builtIns = [ (globalOp "<", Binary LessThan, 3, Infixl)

108+ , (globalOp "<=", Binary LessThanOrEqualTo, 3, Infixl)

109+ , (globalOp ">", Binary GreaterThan, 3, Infixl)

110+ , (globalOp ">=", Binary GreaterThanOrEqualTo, 3, Infixl)

111+ , (globalOp "!!", flip Indexer, 4, Infixl)

112+ , (globalOp "*", Binary Multiply, 5, Infixl)

113+ , (globalOp "/", Binary Divide, 5, Infixl)

114+ , (globalOp "%", Binary Modulus, 5, Infixl)

115+ , (globalOp "++", Binary Concat, 6, Infixr)

116+ , (globalOp "+", Binary Add, 7, Infixl)

117+ , (globalOp "-", Binary Subtract, 7, Infixl)

118+ , (globalOp "<<", Binary ShiftLeft, 8, Infixl)

119+ , (globalOp ">>", Binary ShiftRight, 8, Infixl)

120+ , (globalOp ">>>", Binary ZeroFillShiftRight, 8, Infixl)

121+ , (globalOp "==", Binary EqualTo, 9, Infixl)

122+ , (globalOp "!=", Binary NotEqualTo, 9, Infixl)

123+ , (globalOp "&", Binary BitwiseAnd, 10, Infixl)

124+ , (globalOp "^", Binary BitwiseXor, 10, Infixl)

125+ , (globalOp "|", Binary BitwiseOr, 10, Infixl)

126+ , (globalOp "&&", Binary And, 11, Infixr)

127+ , (globalOp "||", Binary Or, 11, Infixr)

128+ ]

129+

src/Language/PureScript/Optimize.hsnew file+95

@@ -0,0 +1,95 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Optimize

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Optimize (

16+ optimize

17+) where

18+

19+import Data.Data

20+import Data.Generics

21+

22+import Language.PureScript.Names

23+import Language.PureScript.CodeGen.JS.AST

24+

25+optimize :: JS -> JS

26+optimize = removeUnusedVariables . unThunk . etaConvert . inlineVariables

27+

28+replaceIdent :: (Data d) => Ident -> JS -> d -> d

29+replaceIdent var1 js = everywhere (mkT replace)

30+ where

31+ replace (JSVar var2) | var1 == var2 = js

32+ replace js = js

33+

34+isReassigned :: (Data d) => Ident -> d -> Bool

35+isReassigned var1 = everything (||) (mkQ False check)

36+ where

37+ check :: JS -> Bool

38+ check (JSAssignment (JSAssignVariable var2) _) | var1 == var2 = True

39+ check _ = False

40+

41+isUsed :: (Data d) => Ident -> d -> Bool

42+isUsed var1 = everything (||) (mkQ False check)

43+ where

44+ check :: JS -> Bool

45+ check (JSVar var2) | var1 == var2 = True

46+ check (JSAssignment target _) | var1 == targetVariable target = True

47+ check _ = False

48+ targetVariable :: JSAssignment -> Ident

49+ targetVariable (JSAssignVariable var) = var

50+ targetVariable (JSAssignProperty _ tgt) = targetVariable tgt

51+

52+shouldInline :: JS -> Bool

53+shouldInline (JSVar _) = True

54+shouldInline (JSNumericLiteral _) = True

55+shouldInline (JSStringLiteral _) = True

56+shouldInline (JSBooleanLiteral _) = True

57+shouldInline (JSAccessor _ val) = shouldInline val

58+shouldInline (JSIndexer index val) = shouldInline index && shouldInline val

59+shouldInline _ = False

60+

61+inlineVariables :: JS -> JS

62+inlineVariables = everywhere (mkT removeFromBlock)

63+ where

64+ removeFromBlock :: JS -> JS

65+ removeFromBlock (JSBlock sts) = JSBlock (go sts)

66+ removeFromBlock js = js

67+ go :: [JS] -> [JS]

68+ go [] = []

69+ go (JSVariableIntroduction var (Just js) : sts) | shouldInline js && not (isReassigned var sts) = go (replaceIdent var js sts)

70+ go (s:sts) = s : go sts

71+

72+removeUnusedVariables :: JS -> JS

73+removeUnusedVariables = everywhere (mkT removeFromBlock)

74+ where

75+ removeFromBlock :: JS -> JS

76+ removeFromBlock (JSBlock sts) = JSBlock (go sts)

77+ removeFromBlock js = js

78+ go :: [JS] -> [JS]

79+ go [] = []

80+ go (JSVariableIntroduction var _ : sts) | not (isUsed var sts) = go sts

81+ go (s:sts) = s : go sts

82+

83+etaConvert :: JS -> JS

84+etaConvert = everywhere (mkT convert)

85+ where

86+ convert :: JS -> JS

87+ convert (JSBlock [JSReturn (JSApp (JSFunction Nothing [ident] (JSBlock body)) [arg])]) | shouldInline arg = JSBlock (replaceIdent ident arg body)

88+ convert js = js

89+

90+unThunk :: JS -> JS

91+unThunk = everywhere (mkT convert)

92+ where

93+ convert :: JS -> JS

94+ convert (JSBlock [JSReturn (JSApp (JSFunction Nothing [] (JSBlock body)) [])]) = JSBlock body

95+ convert js = js

src/Language/PureScript/Parser.hsnew file+22

@@ -0,0 +1,22 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Parser

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Parser (module P) where

16+

17+import Language.PureScript.Parser.Common as P

18+import Language.PureScript.Parser.Types as P

19+import Language.PureScript.Parser.Values as P

20+import Language.PureScript.Parser.State as P

21+import Language.PureScript.Parser.Kinds as P

22+import Language.PureScript.Parser.Declarations as P

src/Language/PureScript/Parser/Common.hsnew file+203

@@ -0,0 +1,203 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Parser.Common

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE FlexibleContexts #-}

16+

17+module Language.PureScript.Parser.Common where

18+

19+import Data.Char (isSpace)

20+import Control.Applicative

21+import Control.Monad

22+import Control.Monad.State

23+import Language.PureScript.Parser.State

24+import qualified Data.Map as M

25+import qualified Text.Parsec as P

26+import qualified Text.Parsec.Pos as P

27+import qualified Text.Parsec.Token as PT

28+

29+import Language.PureScript.Names

30+

31+reservedNames :: [String]

32+reservedNames = [ "case"

33+ , "of"

34+ , "data"

35+ , "type"

36+ , "var"

37+ , "val"

38+ , "while"

39+ , "for"

40+ , "foreach"

41+ , "if"

42+ , "then"

43+ , "else"

44+ , "return"

45+ , "true"

46+ , "false"

47+ , "foreign"

48+ , "import"

49+ , "member"

50+ , "forall"

51+ , "do"

52+ , "until"

53+ , "in"

54+ , "break"

55+ , "catch"

56+ , "continue"

57+ , "debugger"

58+ , "default"

59+ , "delete"

60+ , "finally"

61+ , "function"

62+ , "instanceof"

63+ , "new"

64+ , "switch"

65+ , "this"

66+ , "throw"

67+ , "try"

68+ , "typeof"

69+ , "void"

70+ , "with"

71+ , "Number"

72+ , "String"

73+ , "Boolean"

74+ , "infixl"

75+ , "infixr"

76+ , "module" ]

77+

78+builtInOperators :: [String]

79+builtInOperators = [ "~", "-", "<=", ">=", "<", ">", "*", "/", "%", "++", "+", "<<", ">>>", ">>"

80+ , "==", "!=", "&&", "||", "&", "^", "|", "!!", "!" ]

81+

82+reservedOpNames :: [String]

83+reservedOpNames = builtInOperators ++ [ "->" ]

84+

85+identStart :: P.Parsec String u Char

86+identStart = P.lower <|> P.oneOf "_$"

87+

88+properNameStart :: P.Parsec String u Char

89+properNameStart = P.upper

90+

91+identLetter :: P.Parsec String u Char

92+identLetter = P.alphaNum <|> P.oneOf "_'"

93+

94+opStart :: P.Parsec String u Char

95+opStart = P.oneOf "!#$%&*+/<=>?@^|~"

96+

97+opLetter :: P.Parsec String u Char

98+opLetter = P.oneOf ":#$%&*+./<=>?@^|"

99+

100+langDef = PT.LanguageDef

101+ { PT.reservedNames = reservedNames

102+ , PT.reservedOpNames = reservedOpNames

103+ , PT.commentStart = "{-"

104+ , PT.commentEnd = "-}"

105+ , PT.commentLine = "--"

106+ , PT.nestedComments = True

107+ , PT.identStart = identStart

108+ , PT.identLetter = identLetter

109+ , PT.opStart = opStart

110+ , PT.opLetter = opLetter

111+ , PT.caseSensitive = True

112+ }

113+

114+tokenParser = PT.makeTokenParser langDef

115+

116+lexeme = PT.lexeme tokenParser

117+identifier = PT.identifier tokenParser

118+reserved = PT.reserved tokenParser

119+reservedOp = PT.reservedOp tokenParser

120+operator = PT.operator tokenParser

121+stringLiteral = PT.stringLiteral tokenParser

122+whiteSpace = PT.whiteSpace tokenParser

123+squares = PT.squares tokenParser

124+semi = PT.semi tokenParser

125+comma = PT.comma tokenParser

126+colon = PT.colon tokenParser

127+dot = PT.dot tokenParser

128+natural = PT.natural tokenParser

129+

130+parens = P.between (lexeme $ P.char '(') (lexeme $ indented *> P.char ')') . (indented *>)

131+braces = P.between (lexeme $ P.char '{') (lexeme $ indented *> P.char '}') . (indented *>)

132+angles = P.between (lexeme $ P.char '<') (lexeme $ indented *> P.char '>') . (indented *>)

133+

134+sepBy p s = P.sepBy (indented *> p) (indented *> s)

135+sepBy1 p s = P.sepBy1 (indented *> p) (indented *> s)

136+

137+semiSep = flip sepBy semi

138+semiSep1 = flip sepBy1 semi

139+commaSep = flip sepBy comma

140+commaSep1 = flip sepBy1 comma

141+

142+tick = lexeme $ P.char '`'

143+pipe = lexeme $ P.char '|'

144+

145+properName :: P.Parsec String u ProperName

146+properName = lexeme $ ProperName <$> P.try ((:) <$> P.upper <*> many (PT.identLetter langDef) P.<?> "name")

147+

148+parseQualified :: P.Parsec String ParseState a -> P.Parsec String ParseState (Qualified a)

149+parseQualified parser = part global

150+ where

151+ part path = (do name <- P.try (properName <* delimiter)

152+ part (subModule path name))

153+ <|> (Qualified path <$> P.try parser)

154+ delimiter = indented *> colon <* P.notFollowedBy colon

155+

156+integerOrFloat :: P.Parsec String u (Either Integer Double)

157+integerOrFloat = (Left <$> P.try (PT.natural tokenParser) <|>

158+ Right <$> P.try (PT.float tokenParser)) P.<?> "number"

159+

160+augment :: P.Stream s m t => P.ParsecT s u m a -> P.ParsecT s u m b -> (a -> b -> a) -> P.ParsecT s u m a

161+augment p q f = flip (maybe id $ flip f) <$> p <*> P.optionMaybe q

162+

163+fold :: P.Stream s m t => P.ParsecT s u m a -> P.ParsecT s u m b -> (a -> b -> a) -> P.ParsecT s u m a

164+fold first more combine = do

165+ a <- first

166+ bs <- P.many more

167+ return $ foldl combine a bs

168+

169+buildPostfixParser :: P.Stream s m t => [P.ParsecT s u m (a -> a)] -> P.ParsecT s u m a -> P.ParsecT s u m a

170+buildPostfixParser f x = fold x (P.choice f) (flip ($))

171+

172+operatorOrBuiltIn :: P.Parsec String u String

173+operatorOrBuiltIn = P.try operator <|> P.choice (map (\s -> P.try (reservedOp s) >> return s) builtInOperators)

174+

175+parseIdent :: P.Parsec String ParseState Ident

176+parseIdent = (Ident <$> identifier) <|> (Op <$> parens operatorOrBuiltIn)

177+

178+parseIdentInfix :: P.Parsec String ParseState (Qualified Ident)

179+parseIdentInfix = (P.between tick tick (parseQualified (Ident <$> identifier))) <|> parseQualified (Op <$> operatorOrBuiltIn)

180+

181+mark :: P.Parsec String ParseState a -> P.Parsec String ParseState a

182+mark p = do

183+ current <- indentationLevel <$> P.getState

184+ pos <- P.sourceColumn <$> P.getPosition

185+ P.modifyState $ \st -> st { indentationLevel = pos }

186+ a <- p

187+ P.modifyState $ \st -> st { indentationLevel = current }

188+ return a

189+

190+checkIndentation :: (P.Column -> P.Column -> Bool) -> P.Parsec String ParseState ()

191+checkIndentation rel = do

192+ col <- P.sourceColumn <$> P.getPosition

193+ current <- indentationLevel <$> P.getState

194+ guard (col `rel` current)

195+

196+indented :: P.Parsec String ParseState ()

197+indented = checkIndentation (>) P.<?> "indentation"

198+

199+same :: P.Parsec String ParseState ()

200+same = checkIndentation (==) P.<?> "no indentation"

201+

202+runIndentParser :: P.Parsec String ParseState a -> String -> Either P.ParseError a

203+runIndentParser p = P.runParser p (ParseState 0) ""

src/Language/PureScript/Parser/Declarations.hsnew file+123

@@ -0,0 +1,123 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Parser.Declarations

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Parser.Declarations (

16+ parseDeclaration,

17+ parseDeclarations

18+) where

19+

20+import Data.Char

21+import Data.List

22+import Data.Maybe

23+import Data.Function

24+import Control.Applicative

25+import Control.Arrow (Arrow(..))

26+import Control.Monad.State

27+import qualified Data.Map as M

28+import qualified Text.Parsec as P

29+import qualified Text.Parsec.Pos as P

30+

31+import Language.PureScript.Names

32+import Language.PureScript.Values

33+import Language.PureScript.Types

34+import Language.PureScript.Parser.State

35+import Language.PureScript.Parser.Common

36+import Language.PureScript.Declarations

37+import Language.PureScript.Parser.Values

38+import Language.PureScript.Parser.Types

39+import Language.PureScript.Parser.Kinds

40+

41+parseDataDeclaration :: P.Parsec String ParseState Declaration

42+parseDataDeclaration = do

43+ reserved "data"

44+ name <- indented *> properName

45+ tyArgs <- many (indented *> identifier)

46+ lexeme $ indented *> P.char '='

47+ ctors <- sepBy1 ((,) <$> properName <*> P.optionMaybe (indented *> parseType)) pipe

48+ return $ DataDeclaration name tyArgs ctors

49+

50+parseTypeDeclaration :: P.Parsec String ParseState Declaration

51+parseTypeDeclaration =

52+ TypeDeclaration <$> P.try (parseIdent <* lexeme (indented *> P.string "::"))

53+ <*> parsePolyType

54+

55+parseTypeSynonymDeclaration :: P.Parsec String ParseState Declaration

56+parseTypeSynonymDeclaration =

57+ TypeSynonymDeclaration <$> (P.try (reserved "type") *> indented *> properName)

58+ <*> many (indented *> identifier)

59+ <*> (lexeme (indented *> P.char '=') *> parseType)

60+

61+parseValueDeclaration :: P.Parsec String ParseState Declaration

62+parseValueDeclaration =

63+ ValueDeclaration <$> P.try (parseIdent <* lexeme (indented *> P.char '='))

64+ <*> parseValue

65+

66+parseExternDeclaration :: P.Parsec String ParseState Declaration

67+parseExternDeclaration = P.try (reserved "foreign") *> indented *> (reserved "import") *> indented *>

68+ (ExternDataDeclaration <$> (P.try (reserved "data") *> indented *> properName)

69+ <*> (lexeme (indented *> P.string "::") *> parseKind)

70+ <|> ExternDeclaration <$> parseIdent

71+ <*> (lexeme (indented *> P.string "::") *> parsePolyType)

72+ <|> ExternMemberDeclaration <$> (P.try (reserved "member") *> indented *> stringLiteral)

73+ <*> (indented *> parseIdent)

74+ <*> (lexeme (indented *> P.string "::") *> parsePolyType))

75+

76+parseAssociativity :: P.Parsec String ParseState Associativity

77+parseAssociativity =

78+ (P.try (reserved "infixl") >> return Infixl) <|>

79+ (P.try (reserved "infixr") >> return Infixr)

80+

81+parseFixity :: P.Parsec String ParseState Fixity

82+parseFixity = Fixity <$> parseAssociativity <*> (indented *> natural)

83+

84+parseFixityDeclaration :: P.Parsec String ParseState Declaration

85+parseFixityDeclaration = do

86+ fixity <- parseFixity

87+ indented

88+ name <- operator

89+ return $ FixityDeclaration fixity name

90+

91+parseModuleDeclaration :: P.Parsec String ParseState Declaration

92+parseModuleDeclaration = do

93+ reserved "module"

94+ indented

95+ name <- properName

96+ lexeme $ P.string "where"

97+ decls <- mark (P.many (same *> parseDeclaration))

98+ return $ ModuleDeclaration name decls

99+

100+parseModulePath :: P.Parsec String ParseState ModulePath

101+parseModulePath = ModulePath <$> properName `sepBy1` dot

102+

103+parseImportDeclaration :: P.Parsec String ParseState Declaration

104+parseImportDeclaration = do

105+ reserved "import"

106+ indented

107+ modulePath <- parseModulePath

108+ idents <- P.optionMaybe $ parens $ commaSep1 parseIdent

109+ return $ ImportDeclaration modulePath idents

110+

111+parseDeclaration :: P.Parsec String ParseState Declaration

112+parseDeclaration = P.choice

113+ [ parseDataDeclaration

114+ , parseTypeDeclaration

115+ , parseTypeSynonymDeclaration

116+ , parseValueDeclaration

117+ , parseExternDeclaration

118+ , parseFixityDeclaration

119+ , parseModuleDeclaration

120+ , parseImportDeclaration ] P.<?> "declaration"

121+

122+parseDeclarations :: P.Parsec String ParseState [Declaration]

123+parseDeclarations = whiteSpace *> mark (P.many (same *> parseDeclaration)) <* P.eof

src/Language/PureScript/Parser/Kinds.hsnew file+41

@@ -0,0 +1,41 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Parser.Kinds

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Parser.Kinds (

16+ parseKind

17+) where

18+

19+import Language.PureScript.Kinds

20+import Language.PureScript.Parser.State

21+import Language.PureScript.Parser.Common

22+import Control.Applicative

23+import qualified Text.Parsec as P

24+import qualified Text.Parsec.Expr as P

25+

26+parseStar :: P.Parsec String ParseState Kind

27+parseStar = const Star <$> lexeme (P.char '*')

28+

29+parseRow :: P.Parsec String ParseState Kind

30+parseRow = const Row <$> lexeme (P.char '#')

31+

32+parseTypeAtom :: P.Parsec String ParseState Kind

33+parseTypeAtom = indented *> P.choice (map P.try

34+ [ parseStar

35+ , parseRow

36+ , parens parseKind ])

37+

38+parseKind :: P.Parsec String ParseState Kind

39+parseKind = P.buildExpressionParser operators parseTypeAtom P.<?> "kind"

40+ where

41+ operators = [ [ P.Infix (lexeme (P.try (P.string "->")) >> return FunKind) P.AssocRight ] ]

src/Language/PureScript/Parser/State.hsnew file+26

@@ -0,0 +1,26 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Parser.State

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Parser.State where

16+

17+import Language.PureScript.Names

18+import Language.PureScript.Declarations

19+

20+import qualified Text.Parsec as P

21+import qualified Data.Map as M

22+

23+data ParseState = ParseState

24+ { indentationLevel :: P.Column } deriving Show

25+

26+

src/Language/PureScript/Parser/Types.hsnew file+105

@@ -0,0 +1,105 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Parser.Types

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Parser.Types (

16+ parseType,

17+ parsePolyType,

18+ parseRow

19+) where

20+

21+import Language.PureScript.Types

22+import Language.PureScript.Parser.State

23+import Language.PureScript.Parser.Common

24+import Control.Applicative

25+import qualified Text.Parsec as P

26+import qualified Text.Parsec.Expr as P

27+import Control.Arrow (Arrow(..))

28+import Control.Monad (unless)

29+

30+parseNumber :: P.Parsec String ParseState Type

31+parseNumber = const Number <$> reserved "Number"

32+

33+parseString :: P.Parsec String ParseState Type

34+parseString = const String <$> reserved "String"

35+

36+parseBoolean :: P.Parsec String ParseState Type

37+parseBoolean = const Boolean <$> reserved "Boolean"

38+

39+parseArray :: P.Parsec String ParseState Type

40+parseArray = squares $ Array <$> parseType

41+

42+parseObject :: P.Parsec String ParseState Type

43+parseObject = braces $ Object <$> parseRow

44+

45+parseFunction :: P.Parsec String ParseState Type

46+parseFunction = do

47+ args <- lexeme $ parens $ commaSep parsePolyType

48+ lexeme $ P.string "->"

49+ resultType <- parseType

50+ return $ Function args resultType

51+

52+parseTypeVariable :: P.Parsec String ParseState Type

53+parseTypeVariable = TypeVar <$> identifier

54+

55+parseTypeConstructor :: P.Parsec String ParseState Type

56+parseTypeConstructor = TypeConstructor <$> parseQualified properName

57+

58+parseForAll :: P.Parsec String ParseState Type

59+parseForAll = (mkForAll <$> (P.try (reserved "forall") *> P.many1 (indented *> identifier) <* indented <* dot)

60+ <*> parseType)

61+

62+parseTypeAtom :: P.Parsec String ParseState Type

63+parseTypeAtom = indented *> P.choice (map P.try

64+ [ parseNumber

65+ , parseString

66+ , parseBoolean

67+ , parseArray

68+ , parseObject

69+ , parseFunction

70+ , parseTypeVariable

71+ , parseTypeConstructor

72+ , parseForAll

73+ , parens parseType ])

74+

75+parseAnyType :: P.Parsec String ParseState Type

76+parseAnyType = (P.buildExpressionParser operators . buildPostfixParser postfixTable $ parseTypeAtom) P.<?> "type"

77+ where

78+ postfixTable :: [P.Parsec String ParseState (Type -> Type)]

79+ postfixTable = [ flip TypeApp <$> P.try (indented *> parseTypeAtom) ]

80+ operators = [ [ P.Infix (lexeme (P.try (P.string "->")) >> return (\t1 t2 -> Function [t1] t2)) P.AssocRight ] ]

81+

82+parseType :: P.Parsec String ParseState Type

83+parseType = do

84+ ty <- parseAnyType

85+ unless (isMonoType ty) $ P.unexpected "polymorphic type"

86+ return ty

87+

88+parsePolyType :: P.Parsec String ParseState PolyType

89+parsePolyType = do

90+ ty <- parseAnyType

91+ unless (isPolyType ty) $ P.unexpected "polymorphic type"

92+ return ty

93+

94+parseNameAndType :: P.Parsec String ParseState (String, Type)

95+parseNameAndType = (,) <$> (indented *> identifier <* indented <* lexeme (P.string "::")) <*> parseType

96+

97+parseRowEnding :: P.Parsec String ParseState Row

98+parseRowEnding = P.option REmpty (RowVar <$> (lexeme (indented *> P.char '|') *> indented *> identifier))

99+

100+parseRow :: P.Parsec String ParseState Row

101+parseRow = (fromList <$> (commaSep parseNameAndType) <*> parseRowEnding) P.<?> "row"

102+ where

103+ fromList :: [(String, Type)] -> Row -> Row

104+ fromList [] r = r

105+ fromList ((name, t):ts) r = RCons name t (fromList ts r)

src/Language/PureScript/Parser/Values.hsnew file+259

@@ -0,0 +1,259 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Parser.Values

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Parser.Values (

16+ parseValue,

17+ parseBinder

18+) where

19+

20+import Language.PureScript.Values

21+import Language.PureScript.Names

22+import Language.PureScript.Declarations

23+import Language.PureScript.Parser.State

24+import Data.Function (on)

25+import Data.List

26+import Data.Functor.Identity

27+import qualified Data.Map as M

28+import qualified Language.PureScript.Parser.Common as C

29+import Control.Applicative

30+import qualified Text.Parsec as P

31+import Text.Parsec.Expr

32+import Control.Monad

33+import Control.Arrow (Arrow(..))

34+import Language.PureScript.Parser.Types

35+import Language.PureScript.Types

36+

37+booleanLiteral :: P.Parsec String ParseState Bool

38+booleanLiteral = (C.reserved "true" >> return True) P.<|> (C.reserved "false" >> return False)

39+

40+parseNumericLiteral :: P.Parsec String ParseState Value

41+parseNumericLiteral = NumericLiteral <$> C.integerOrFloat

42+

43+parseStringLiteral :: P.Parsec String ParseState Value

44+parseStringLiteral = StringLiteral <$> C.stringLiteral

45+

46+parseBooleanLiteral :: P.Parsec String ParseState Value

47+parseBooleanLiteral = BooleanLiteral <$> booleanLiteral

48+

49+parseArrayLiteral :: P.Parsec String ParseState Value

50+parseArrayLiteral = ArrayLiteral <$> C.squares (C.commaSep parseValue)

51+

52+parseObjectLiteral :: P.Parsec String ParseState Value

53+parseObjectLiteral = ObjectLiteral <$> C.braces (C.commaSep parseIdentifierAndValue)

54+

55+parseIdentifierAndValue :: P.Parsec String ParseState (String, Value)

56+parseIdentifierAndValue = (,) <$> (C.indented *> C.identifier <* C.indented <* C.colon)

57+ <*> (C.indented *> parseValue)

58+

59+parseAbs :: P.Parsec String ParseState Value

60+parseAbs = do

61+ C.lexeme $ P.char '\\'

62+ args <- P.many (C.indented *> (P.try singleArg <|> manyArgs))

63+ C.lexeme $ C.indented *> P.string "->"

64+ value <- parseValue

65+ return $ toFunction args value

66+ where

67+ manyArgs :: P.Parsec String ParseState (Value -> Value)

68+ manyArgs = do

69+ args <- C.parens (C.commaSep C.parseIdent)

70+ return $ Abs args

71+ singleArg :: P.Parsec String ParseState (Value -> Value)

72+ singleArg = Abs . return <$> C.parseIdent

73+ toFunction :: [Value -> Value] -> Value -> Value

74+ toFunction [] value = Abs [] value

75+ toFunction args value = foldr (($)) value args

76+

77+parseApp :: P.Parsec String ParseState Value

78+parseApp = App <$> parseValue

79+ <*> (C.indented *> C.parens (C.commaSep parseValue))

80+

81+parseVar :: P.Parsec String ParseState Value

82+parseVar = Var <$> C.parseQualified C.parseIdent

83+

84+parseConstructor :: P.Parsec String ParseState Value

85+parseConstructor = Constructor <$> C.parseQualified C.properName

86+

87+parseCase :: P.Parsec String ParseState Value

88+parseCase = Case <$> P.between (P.try (C.reserved "case")) (C.indented *> C.reserved "of") parseValue

89+ <*> (C.indented *> C.mark (P.many (C.same *> C.mark parseCaseAlternative)))

90+

91+parseCaseAlternative :: P.Parsec String ParseState (Binder, Value)

92+parseCaseAlternative = (,) <$> (parseGuardedBinder <* C.lexeme (P.string "->"))

93+ <*> parseValue

94+ P.<?> "case alternative"

95+

96+parseIfThenElse :: P.Parsec String ParseState Value

97+parseIfThenElse = IfThenElse <$> (P.try (C.reserved "if") *> C.indented *> parseValue)

98+ <*> (C.indented *> C.reserved "then" *> C.indented *> parseValue)

99+ <*> (C.indented *> C.reserved "else" *> C.indented *> parseValue)

100+

101+parseBlock :: P.Parsec String ParseState Value

102+parseBlock = Block <$> (P.try (C.reserved "do") *> parseManyStatements)

103+

104+parseManyStatements :: P.Parsec String ParseState [Statement]

105+parseManyStatements = C.indented *> C.mark (P.many (C.same *> C.mark parseStatement)) P.<?> "block"

106+

107+parseValueAtom :: P.Parsec String ParseState Value

108+parseValueAtom = C.indented *> P.choice

109+ [ P.try parseNumericLiteral

110+ , P.try parseStringLiteral

111+ , P.try parseBooleanLiteral

112+ , parseArrayLiteral

113+ , parseObjectLiteral

114+ , parseAbs

115+ , P.try parseConstructor

116+ , P.try parseVar

117+ , parseBlock

118+ , parseCase

119+ , parseIfThenElse

120+ , Parens <$> C.parens parseValue ]

121+

122+parsePropertyUpdate :: P.Parsec String ParseState (String, Value)

123+parsePropertyUpdate = do

124+ name <- C.lexeme C.identifier

125+ C.lexeme $ C.indented *> P.char '='

126+ value <- C.indented *> parseValue

127+ return (name, value)

128+

129+parseValue :: P.Parsec String ParseState Value

130+parseValue =

131+ (buildExpressionParser operators

132+ . C.buildPostfixParser postfixTable2

133+ $ indexersAndAccessors) P.<?> "expression"

134+ where

135+ indexersAndAccessors = C.buildPostfixParser postfixTable1 parseValueAtom

136+ postfixTable1 = [ Accessor <$> (C.indented *> C.dot *> C.indented *> C.identifier)

137+ , P.try $ flip ObjectUpdate <$> (C.indented *> C.braces (C.commaSep1 (C.indented *> parsePropertyUpdate))) ]

138+ postfixTable2 = [ P.try (C.indented *> indexersAndAccessors >>= \t2 -> return (\t1 -> App t1 [t2]))

139+ , P.try $ flip App <$> (C.indented *> C.parens (C.commaSep parseValue))

140+ , flip TypedValue <$> (P.try (C.lexeme (C.indented *> P.string "::")) *> parsePolyType) ]

141+ operators = [ [ Prefix $ C.lexeme (P.try $ C.indented *> C.reservedOp "!") >> return (Unary Not)

142+ , Prefix $ C.lexeme (P.try $ C.indented *> C.reservedOp "~") >> return (Unary BitwiseNot)

143+ , Prefix $ C.lexeme (P.try $ C.indented *> C.reservedOp "-") >> return (Unary Negate)

144+ , Prefix $ C.lexeme (P.try $ C.indented *> C.reservedOp "+") >> return id ]

145+ , [ Infix (C.lexeme (P.try (C.indented *> C.parseIdentInfix P.<?> "operator") >>= \ident ->

146+ return (BinaryNoParens ident))) AssocRight ]

147+ ]

148+

149+parseVariableIntroduction :: P.Parsec String ParseState Statement

150+parseVariableIntroduction = do

151+ C.reserved "var"

152+ name <- C.indented *> C.parseIdent

153+ C.lexeme $ C.indented *> P.char '='

154+ value <- parseValue

155+ return $ VariableIntroduction name value

156+

157+parseAssignment :: P.Parsec String ParseState Statement

158+parseAssignment = do

159+ tgt <- C.parseIdent

160+ C.lexeme $ C.indented *> P.char '='

161+ value <- parseValue

162+ return $ Assignment tgt value

163+

164+parseWhile :: P.Parsec String ParseState Statement

165+parseWhile = While <$> (C.reserved "while" *> C.indented *> parseValue <* C.indented <* C.colon)

166+ <*> parseManyStatements

167+

168+parseFor :: P.Parsec String ParseState Statement

169+parseFor = For <$> (C.reserved "for" *> C.indented *> C.parseIdent)

170+ <*> (C.indented *> C.lexeme (P.string "<-") *> parseValue)

171+ <*> (C.indented *> C.reserved "until" *> parseValue <* C.colon)

172+ <*> parseManyStatements

173+

174+parseForEach :: P.Parsec String ParseState Statement

175+parseForEach = ForEach <$> (C.reserved "foreach" *> C.indented *> C.parseIdent)

176+ <*> (C.indented *> C.reserved "in" *> parseValue <* C.colon)

177+ <*> parseManyStatements

178+

179+parseIf :: P.Parsec String ParseState Statement

180+parseIf = If <$> parseIfStatement

181+

182+parseIfStatement :: P.Parsec String ParseState IfStatement

183+parseIfStatement =

184+ IfStatement <$> (C.reserved "if" *> C.indented *> parseValue <* C.indented <* C.colon)

185+ <*> parseManyStatements

186+ <*> P.optionMaybe (C.same *> parseElseStatement)

187+

188+parseElseStatement :: P.Parsec String ParseState ElseStatement

189+parseElseStatement = C.reserved "else" >> (ElseIf <$> (C.indented *> parseIfStatement)

190+ <|> Else <$> (C.indented *> C.colon *> parseManyStatements))

191+

192+parseReturn :: P.Parsec String ParseState Statement

193+parseReturn = Return <$> (C.reserved "return" *> parseValue)

194+

195+parseStatement :: P.Parsec String ParseState Statement

196+parseStatement = P.choice (map P.try

197+ [ parseVariableIntroduction

198+ , parseAssignment

199+ , parseWhile

200+ , parseFor

201+ , parseForEach

202+ , parseIf

203+ , parseReturn ]) P.<?> "statement"

204+

205+parseStringBinder :: P.Parsec String ParseState Binder

206+parseStringBinder = StringBinder <$> C.stringLiteral

207+

208+parseBooleanBinder :: P.Parsec String ParseState Binder

209+parseBooleanBinder = BooleanBinder <$> booleanLiteral

210+

211+parseNumberBinder :: P.Parsec String ParseState Binder

212+parseNumberBinder = NumberBinder <$> C.integerOrFloat

213+

214+parseVarBinder :: P.Parsec String ParseState Binder

215+parseVarBinder = VarBinder <$> C.parseIdent

216+

217+parseNullaryBinder :: P.Parsec String ParseState Binder

218+parseNullaryBinder = NullaryBinder <$> C.lexeme (C.parseQualified C.properName)

219+

220+parseUnaryBinder :: P.Parsec String ParseState Binder

221+parseUnaryBinder = UnaryBinder <$> C.lexeme (C.parseQualified C.properName) <*> (C.indented *> parseBinder)

222+

223+parseObjectBinder :: P.Parsec String ParseState Binder

224+parseObjectBinder = ObjectBinder <$> C.braces (C.commaSep (C.indented *> parseIdentifierAndBinder))

225+

226+parseArrayBinder :: P.Parsec String ParseState Binder

227+parseArrayBinder = C.squares $ ArrayBinder <$> (C.commaSep (C.indented *> parseBinder))

228+ <*> P.optionMaybe (C.indented *> C.colon *> C.indented *> parseBinder)

229+

230+parseNamedBinder :: P.Parsec String ParseState Binder

231+parseNamedBinder = NamedBinder <$> (C.parseIdent <* C.indented <* C.lexeme (P.char '@'))

232+ <*> (C.indented *> parseBinder)

233+

234+parseNullBinder :: P.Parsec String ParseState Binder

235+parseNullBinder = C.lexeme (P.char '_') *> P.notFollowedBy C.identLetter *> return NullBinder

236+

237+parseIdentifierAndBinder :: P.Parsec String ParseState (String, Binder)

238+parseIdentifierAndBinder = do

239+ name <- C.lexeme C.identifier

240+ C.lexeme $ C.indented *> P.char '='

241+ binder <- C.indented *> parseBinder

242+ return (name, binder)

243+

244+parseBinder :: P.Parsec String ParseState Binder

245+parseBinder = P.choice (map P.try

246+ [ parseNullBinder

247+ , parseStringBinder

248+ , parseBooleanBinder

249+ , parseNumberBinder

250+ , parseNamedBinder

251+ , parseVarBinder

252+ , parseUnaryBinder

253+ , parseNullaryBinder

254+ , parseObjectBinder

255+ , parseArrayBinder

256+ , C.parens parseBinder ]) P.<?> "binder"

257+

258+parseGuardedBinder :: P.Parsec String ParseState Binder

259+parseGuardedBinder = flip ($) <$> parseBinder <*> P.option id (GuardedBinder <$> (C.indented *> C.lexeme (P.char '|') *> C.indented *> parseValue))

src/Language/PureScript/Pretty.hsnew file+23

@@ -0,0 +1,23 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Pretty

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Pretty (module P) where

16+

17+import Language.PureScript.Pretty.Kinds as P

18+import Language.PureScript.Pretty.Values as P

19+import Language.PureScript.Pretty.Types as P

20+import Language.PureScript.Pretty.JS as P

21+

22+

23+

src/Language/PureScript/Pretty/Common.hsnew file+86

@@ -0,0 +1,86 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Pretty.Common

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE GeneralizedNewtypeDeriving, GADTs #-}

16+

17+module Language.PureScript.Pretty.Common where

18+

19+import Data.Char

20+import Data.Maybe (fromMaybe)

21+import Data.List (nub, intersperse, intercalate)

22+import Data.Function (fix)

23+import Control.Monad.State

24+import Control.Applicative (Applicative(..), Alternative(..))

25+import qualified Control.Category as C

26+import Control.Category ((>>>))

27+import qualified Control.Arrow as A

28+import Control.Arrow ((***), (<+>))

29+

30+import Language.PureScript.Names

31+import Language.PureScript.Values

32+import Language.PureScript.Types

33+import Language.PureScript.Declarations

34+

35+identToJs :: Ident -> String

36+identToJs (Ident name) = name

37+identToJs (Op op) = concatMap opCharToString op

38+ where

39+ opCharToString :: Char -> String

40+ opCharToString = (:) '$'. show . ord

41+

42+newtype Pattern u a b = Pattern { runPattern :: A.Kleisli (StateT u Maybe) a b } deriving (C.Category, A.Arrow, A.ArrowZero, A.ArrowPlus)

43+

44+instance Functor (Pattern u a) where

45+ fmap f (Pattern p) = Pattern $ A.Kleisli $ fmap f . A.runKleisli p

46+

47+pattern :: Pattern u a b -> u -> a -> Maybe b

48+pattern p u = flip evalStateT u . A.runKleisli (runPattern p)

49+

50+mkPattern :: (a -> Maybe b) -> Pattern u a b

51+mkPattern f = Pattern $ A.Kleisli (lift . f)

52+

53+mkPattern' :: (a -> StateT u Maybe b) -> Pattern u a b

54+mkPattern' = Pattern . A.Kleisli

55+

56+parens :: String -> String

57+parens s = ('(':s) ++ ")"

58+

59+chainl :: Pattern u a (a, a) -> (r -> r -> r) -> Pattern u a r -> Pattern u a r

60+chainl split f p = fix $ \c -> split >>> ((c <+> p) *** p) >>> A.arr (uncurry f)

61+

62+chainr :: Pattern u a (a, a) -> (r -> r -> r) -> Pattern u a r -> Pattern u a r

63+chainr split f p = fix $ \c -> split >>> (p *** (c <+> p)) >>> A.arr (uncurry f)

64+

65+wrap :: Pattern u a (s, a) -> (s -> r -> r) -> Pattern u a r -> Pattern u a r

66+wrap split f p = fix $ \c -> split >>> (C.id *** (c <+> p)) >>> A.arr (uncurry f)

67+

68+split :: Pattern u a (s, t) -> (s -> t -> r) -> Pattern u a r -> Pattern u a r

69+split s f p = s >>> A.arr (uncurry f)

70+

71+data OperatorTable u a r = OperatorTable { runOperatorTable :: [ [Operator u a r] ] }

72+

73+data Operator u a r where

74+ AssocL :: Pattern u a (a, a) -> (r -> r -> r) -> Operator u a r

75+ AssocR :: Pattern u a (a, a) -> (r -> r -> r) -> Operator u a r

76+ Wrap :: Pattern u a (s, a) -> (s -> r -> r) -> Operator u a r

77+ Split :: Pattern u a (s, t) -> (s -> t -> r) -> Operator u a r

78+

79+buildPrettyPrinter :: OperatorTable u a r -> Pattern u a r -> Pattern u a r

80+buildPrettyPrinter table p = foldl (\p' ops -> foldl1 (<+>) (flip map ops $ \op ->

81+ case op of

82+ AssocL pat g -> chainl pat g p'

83+ AssocR pat g -> chainr pat g p'

84+ Wrap pat g -> wrap pat g p'

85+ Split pat g -> split pat g p'

86+ ) <+> p') p $ runOperatorTable table

src/Language/PureScript/Pretty/JS.hsnew file+225

@@ -0,0 +1,225 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Pretty.JS

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Pretty.JS (

16+ prettyPrintJS

17+) where

18+

19+import Language.PureScript.Names

20+import Language.PureScript.Values

21+import Language.PureScript.Pretty.Common

22+import Language.PureScript.CodeGen.JS.AST

23+

24+import Data.List

25+import Data.Maybe (fromMaybe)

26+import qualified Control.Arrow as A

27+import Control.Arrow ((***), (<+>), first, second)

28+import Control.Applicative

29+import Control.Monad.State

30+

31+newtype PrinterState = PrinterState { indent :: Int } deriving (Show, Eq, Ord)

32+

33+blockIndent :: Int

34+blockIndent = 4

35+

36+withIndent :: StateT PrinterState Maybe String -> StateT PrinterState Maybe String

37+withIndent s = do

38+ current <- get

39+ modify $ \s -> s { indent = indent s + blockIndent }

40+ result <- s

41+ modify $ \s -> s { indent = indent s - blockIndent }

42+ return result

43+

44+currentIndent :: StateT PrinterState Maybe String

45+currentIndent = do

46+ current <- get

47+ return $ replicate (indent current) ' '

48+

49+literals :: Pattern PrinterState JS String

50+literals = mkPattern' match

51+ where

52+ match :: JS -> StateT PrinterState Maybe String

53+ match (JSNumericLiteral n) = return $ either show show n

54+ match (JSStringLiteral s) = return $ show s

55+ match (JSBooleanLiteral True) = return "true"

56+ match (JSBooleanLiteral False) = return "false"

57+ match (JSArrayLiteral xs) = fmap concat $ sequence

58+ [ return "[ "

59+ , fmap (intercalate ", ") $ forM xs prettyPrintJS'

60+ , return " ]"

61+ ]

62+ match (JSObjectLiteral ps) = fmap concat $ sequence

63+ [ return "{\n"

64+ , withIndent $ do

65+ jss <- forM ps $ \(key, value) -> fmap ((key ++ ": ") ++) . prettyPrintJS' $ value

66+ indentString <- currentIndent

67+ return $ intercalate ", \n" $ map (indentString ++) jss

68+ , return "\n"

69+ , currentIndent

70+ , return "}"

71+ ]

72+ match (JSBlock sts) = fmap concat $ sequence

73+ [ return "{\n"

74+ , withIndent $ do

75+ jss <- forM sts prettyPrintJS'

76+ indentString <- currentIndent

77+ return $ intercalate "\n" $ map (++ "; ") $ map (indentString ++) jss

78+ , return "\n"

79+ , currentIndent

80+ , return "}"

81+ ]

82+ match (JSVar ident) = return (identToJs ident)

83+ match (JSVariableIntroduction ident value) = fmap concat $ sequence

84+ [ return "var "

85+ , return $ identToJs ident

86+ , maybe (return "") (fmap (" = " ++) . prettyPrintJS') value

87+ ]

88+ match (JSAssignment target value) = fmap concat $ sequence

89+ [ return $ targetToJs target

90+ , return " = "

91+ , prettyPrintJS' value

92+ ]

93+ match (JSWhile cond sts) = fmap concat $ sequence

94+ [ return "while ("

95+ , prettyPrintJS' cond

96+ , return ") "

97+ , prettyPrintJS' sts

98+ ]

99+ match (JSFor ident start end sts) = fmap concat $ sequence

100+ [ return $ "for (" ++ identToJs ident ++ " = "

101+ , prettyPrintJS' start

102+ , return $ "; " ++ identToJs ident ++ " < "

103+ , prettyPrintJS' end

104+ , return $ "; " ++ identToJs ident ++ "++) "

105+ , prettyPrintJS' sts

106+ ]

107+ match (JSIfElse cond thens elses) = fmap concat $ sequence

108+ [ return "if ("

109+ , prettyPrintJS' cond

110+ , return ") "

111+ , prettyPrintJS' thens

112+ , maybe (return "") (fmap (" else " ++) . prettyPrintJS') elses

113+ ]

114+ match (JSReturn value) = fmap concat $ sequence

115+ [ return "return "

116+ , prettyPrintJS' value

117+ ]

118+ match (JSThrow value) = fmap concat $ sequence

119+ [ return "throw "

120+ , prettyPrintJS' value

121+ ]

122+ match _ = mzero

123+

124+targetToJs :: JSAssignment -> String

125+targetToJs (JSAssignVariable ident) = identToJs ident

126+targetToJs (JSAssignProperty prop target) = targetToJs target ++ "." ++ prop

127+

128+conditional :: Pattern PrinterState JS ((JS, JS), JS)

129+conditional = mkPattern match

130+ where

131+ match (JSConditional cond th el) = Just ((th, el), cond)

132+ match _ = Nothing

133+

134+accessor :: Pattern PrinterState JS (String, JS)

135+accessor = mkPattern match

136+ where

137+ match (JSAccessor prop val) = Just (prop, val)

138+ match _ = Nothing

139+

140+indexer :: Pattern PrinterState JS (String, JS)

141+indexer = mkPattern' match

142+ where

143+ match (JSIndexer index val) = (,) <$> prettyPrintJS' index <*> pure val

144+ match _ = mzero

145+

146+lam :: Pattern PrinterState JS ((Maybe Ident, [Ident]), JS)

147+lam = mkPattern match

148+ where

149+ match (JSFunction name args ret) = Just ((name, args), ret)

150+ match _ = Nothing

151+

152+app :: Pattern PrinterState JS (String, JS)

153+app = mkPattern' match

154+ where

155+ match (JSApp val args) = do

156+ jss <- mapM prettyPrintJS' args

157+ return (intercalate ", " jss, val)

158+ match _ = mzero

159+

160+unary :: UnaryOperator -> String -> Operator PrinterState JS String

161+unary op str = Wrap pattern (++)

162+ where

163+ pattern :: Pattern PrinterState JS (String, JS)

164+ pattern = mkPattern match

165+ where

166+ match (JSUnary op' val) | op' == op = Just (str, val)

167+ match _ = Nothing

168+

169+binary :: BinaryOperator -> String -> Operator PrinterState JS String

170+binary op str = AssocR pattern (\v1 v2 -> v1 ++ " " ++ str ++ " " ++ v2)

171+ where

172+ pattern :: Pattern PrinterState JS (JS, JS)

173+ pattern = mkPattern match

174+ where

175+ match (JSBinary op' v1 v2) | op' == op = Just (v1, v2)

176+ match _ = Nothing

177+

178+prettyPrintJS1 :: JS -> String

179+prettyPrintJS1 = fromMaybe (error "Incomplete pattern") . flip evalStateT (PrinterState 0) . prettyPrintJS'

180+

181+prettyPrintJS :: [JS] -> String

182+prettyPrintJS sts = fromMaybe (error "Incomplete pattern") . flip evalStateT (PrinterState 0) $ do

183+ jss <- forM sts prettyPrintJS'

184+ indentString <- currentIndent

185+ return $ intercalate "\n" $ map (++ "; ") $ map (indentString ++) jss

186+

187+prettyPrintJS' :: JS -> StateT PrinterState Maybe String

188+prettyPrintJS' = A.runKleisli $ runPattern matchValue

189+ where

190+ matchValue :: Pattern PrinterState JS String

191+ matchValue = buildPrettyPrinter operators (literals <+> fmap parens matchValue)

192+ operators :: OperatorTable PrinterState JS String

193+ operators =

194+ OperatorTable [ [ Wrap accessor $ \prop val -> val ++ "." ++ prop ]

195+ , [ Wrap indexer $ \index val -> val ++ "[" ++ index ++ "]" ]

196+ , [ Wrap app $ \args val -> val ++ "(" ++ args ++ ")" ]

197+ , [ Wrap lam $ \(name, args) ret -> "function "

198+ ++ maybe "" identToJs name

199+ ++ "(" ++ intercalate ", " (map identToJs args) ++ ") "

200+ ++ ret ]

201+ , [ Wrap conditional $ \(th, el) cond -> cond ++ " ? " ++ prettyPrintJS1 th ++ " : " ++ prettyPrintJS1 el ]

202+ , [ binary LessThan "<" ]

203+ , [ binary LessThanOrEqualTo "<=" ]

204+ , [ binary GreaterThan ">" ]

205+ , [ binary GreaterThanOrEqualTo ">=" ]

206+ , [ unary Not "!" ]

207+ , [ unary BitwiseNot "~" ]

208+ , [ unary Negate "-" ]

209+ , [ binary Multiply "*" ]

210+ , [ binary Divide "/" ]

211+ , [ binary Modulus "%" ]

212+ , [ binary Concat "+" ]

213+ , [ binary Add "+" ]

214+ , [ binary Subtract "-" ]

215+ , [ binary ShiftLeft "<<" ]

216+ , [ binary ShiftRight ">>" ]

217+ , [ binary ZeroFillShiftRight ">>>" ]

218+ , [ binary EqualTo "===" ]

219+ , [ binary NotEqualTo "!==" ]

220+ , [ binary BitwiseAnd "&" ]

221+ , [ binary BitwiseXor "^" ]

222+ , [ binary BitwiseOr "|" ]

223+ , [ binary And "&&" ]

224+ , [ binary Or "||" ]

225+ ]

src/Language/PureScript/Pretty/Kinds.hsnew file+51

@@ -0,0 +1,51 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Pretty.Kinds

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Pretty.Kinds (

16+ prettyPrintKind

17+) where

18+

19+import Data.Maybe (fromMaybe)

20+import Data.List (intersperse, intercalate)

21+import qualified Control.Arrow as A

22+import Control.Arrow ((<+>))

23+import qualified Data.Map as M

24+import Control.Applicative

25+

26+import Language.PureScript.Kinds

27+import Language.PureScript.Pretty.Common

28+import Language.PureScript.Unknown

29+

30+typeLiterals :: Pattern () Kind String

31+typeLiterals = mkPattern match

32+ where

33+ match Star = Just "*"

34+ match Row = Just "#"

35+ match (KUnknown (Unknown u)) = Just $ 'u' : show u

36+ match _ = Nothing

37+

38+funKind :: Pattern () Kind (Kind, Kind)

39+funKind = mkPattern match

40+ where

41+ match (FunKind arg ret) = Just (arg, ret)

42+ match _ = Nothing

43+

44+prettyPrintKind :: Kind -> String

45+prettyPrintKind = fromMaybe (error "Incomplete pattern") . pattern matchKind ()

46+ where

47+ matchKind :: Pattern () Kind String

48+ matchKind = buildPrettyPrinter operators (typeLiterals <+> fmap parens matchKind)

49+ operators :: OperatorTable () Kind String

50+ operators =

51+ OperatorTable [ [ AssocR funKind $ \arg ret -> arg ++ " -> " ++ ret ] ]

src/Language/PureScript/Pretty/Types.hsnew file+94

@@ -0,0 +1,94 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Pretty.Types

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Pretty.Types (

16+ prettyPrintType,

17+ prettyPrintRow

18+) where

19+

20+import Data.Maybe (fromMaybe)

21+import Data.List (intersperse, intercalate)

22+import qualified Control.Arrow as A

23+import Control.Arrow ((<+>))

24+import qualified Data.Map as M

25+import Control.Applicative

26+

27+import Language.PureScript.Values

28+import Language.PureScript.Types

29+import Language.PureScript.Names

30+import Language.PureScript.Declarations

31+import Language.PureScript.TypeChecker.Monad

32+import Language.PureScript.Pretty.Common

33+import Language.PureScript.Unknown

34+

35+typeLiterals :: Pattern () Type String

36+typeLiterals = mkPattern match

37+ where

38+ match Number = Just "Number"

39+ match String = Just "String"

40+ match Boolean = Just "Boolean"

41+ match (Array ty) = Just $ "[" ++ prettyPrintType ty ++ "]"

42+ match (Object row) = Just $ "{ " ++ prettyPrintRow row ++ " }"

43+ match (TypeVar var) = Just var

44+ match (TypeConstructor ctor) = Just $ show ctor

45+ match (TUnknown (Unknown u)) = Just $ 'u' : show u

46+ match (Skolem s) = Just $ 's' : show s

47+ match (SaturatedTypeSynonym name args) = Just $ show name ++ "<" ++ intercalate "," (map prettyPrintType args) ++ ">"

48+ match (ForAll ident ty) = Just $ "forall " ++ ident ++ ". " ++ prettyPrintType ty

49+ match _ = Nothing

50+

51+prettyPrintRow :: Row -> String

52+prettyPrintRow = (\(tys, tail) -> intercalate ", " (map (uncurry nameAndTypeToPs) tys) ++ tailToPs tail) . toList []

53+ where

54+ nameAndTypeToPs :: String -> Type -> String

55+ nameAndTypeToPs name ty = name ++ " :: " ++ prettyPrintType ty

56+ tailToPs :: Row -> String

57+ tailToPs REmpty = ""

58+ tailToPs (RUnknown (Unknown u)) = " | u" ++ show u

59+ tailToPs (RowVar var) = " | " ++ var

60+ tailToPs (RSkolem s) = " | s" ++ show s

61+ toList :: [(String, Type)] -> Row -> ([(String, Type)], Row)

62+ toList tys (RCons name ty row) = toList ((name, ty):tys) row

63+ toList tys r = (tys, r)

64+

65+typeApp :: Pattern () Type (Type, Type)

66+typeApp = mkPattern match

67+ where

68+ match (TypeApp f x) = Just (f, x)

69+ match _ = Nothing

70+

71+singleArgumentFunction :: Pattern () Type (Type, Type)

72+singleArgumentFunction = mkPattern match

73+ where

74+ match (Function [arg] ret) = Just (arg, ret)

75+ match _ = Nothing

76+

77+function :: Pattern () Type ([Type], Type)

78+function = mkPattern match

79+ where

80+ match (Function args ret) = Just (args, ret)

81+ match _ = Nothing

82+

83+prettyPrintType :: Type -> String

84+prettyPrintType = fromMaybe (error "Incomplete pattern") . pattern matchType ()

85+ where

86+ matchType :: Pattern () Type String

87+ matchType = buildPrettyPrinter operators (typeLiterals <+> fmap parens matchType)

88+ operators :: OperatorTable () Type String

89+ operators =

90+ OperatorTable [ [ AssocL typeApp $ \f x -> f ++ " " ++ x ]

91+ , [ AssocR singleArgumentFunction $ \arg ret -> arg ++ " -> " ++ ret

92+ , Wrap function $ \args ret -> "(" ++ intercalate ", " (map prettyPrintType args) ++ ") -> " ++ ret

93+ ]

94+ ]

src/Language/PureScript/Pretty/Values.hsnew file+193

@@ -0,0 +1,193 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Pretty.Values

4+-- Copyright : Kinds.hs(c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.Pretty.Values (

16+ prettyPrintValue,

17+ prettyPrintBinder

18+) where

19+

20+import Data.Char

21+import Data.Maybe (fromMaybe)

22+import Data.List (intercalate)

23+import qualified Control.Arrow as A

24+import Control.Arrow ((<+>))

25+import Control.Applicative

26+

27+import Language.PureScript.Types

28+import Language.PureScript.Values

29+import Language.PureScript.Names

30+import Language.PureScript.Pretty.Common

31+import Language.PureScript.Pretty.Types

32+

33+literals :: Pattern () Value String

34+literals = mkPattern match

35+ where

36+ match (NumericLiteral n) = Just $ either show show n

37+ match (StringLiteral s) = Just $ show s

38+ match (BooleanLiteral True) = Just "true"

39+ match (BooleanLiteral False) = Just "false"

40+ match (ArrayLiteral xs) = Just $ "[" ++ intercalate ", " (map prettyPrintValue xs) ++ "]"

41+ match (ObjectLiteral ps) = Just $ "{" ++ intercalate ", " (map (uncurry prettyPrintObjectProperty) ps) ++ "}"

42+ match (Constructor name) = Just $ show name

43+ match (Block sts) = Just $ "do { " ++ intercalate " ; " (map prettyPrintStatement sts) ++ " }"

44+ match (Case value binders) = Just $ "case " ++ prettyPrintValue value ++ " of { " ++ intercalate " ; " (map (uncurry prettyPrintCaseAlternative) binders) ++ " }"

45+ match (Var ident) = Just $ show ident

46+ match _ = Nothing

47+

48+prettyPrintCaseAlternative :: Binder -> Value -> String

49+prettyPrintCaseAlternative binder val = prettyPrintBinder binder ++ " -> " ++ prettyPrintValue val

50+

51+ifThenElse :: Pattern () Value ((Value, Value), Value)

52+ifThenElse = mkPattern match

53+ where

54+ match (IfThenElse cond th el) = Just ((th, el), cond)

55+ match _ = Nothing

56+

57+accessor :: Pattern () Value (String, Value)

58+accessor = mkPattern match

59+ where

60+ match (Accessor prop val) = Just (prop, val)

61+ match _ = Nothing

62+

63+indexer :: Pattern () Value (Value, Value)

64+indexer = mkPattern match

65+ where

66+ match (Indexer index val) = Just (index, val)

67+ match _ = Nothing

68+

69+objectUpdate :: Pattern () Value ([String], Value)

70+objectUpdate = mkPattern match

71+ where

72+ match (ObjectUpdate o ps) = Just (flip map ps $ \(key, val) -> key ++ " = " ++ prettyPrintValue val, o)

73+ match _ = Nothing

74+

75+app :: Pattern () Value (String, Value)

76+app = mkPattern match

77+ where

78+ match (App val args) = Just (intercalate "," (map prettyPrintValue args), val)

79+ match _ = Nothing

80+

81+lam :: Pattern () Value ([String], Value)

82+lam = mkPattern match

83+ where

84+ match (Abs args val) = Just (map show args, val)

85+ match _ = Nothing

86+

87+typed :: Pattern () Value (PolyType, Value)

88+typed = mkPattern match

89+ where

90+ match (TypedValue val ty) = Just (ty, val)

91+ match _ = Nothing

92+

93+unary :: UnaryOperator -> String -> Operator () Value String

94+unary op str = Wrap pattern (++)

95+ where

96+ pattern :: Pattern () Value (String, Value)

97+ pattern = mkPattern match

98+ where

99+ match (Unary op' val) | op' == op = Just (str, val)

100+ match _ = Nothing

101+

102+binary :: BinaryOperator -> String -> Operator () Value String

103+binary op str = AssocR pattern (\v1 v2 -> v1 ++ " " ++ str ++ " " ++ v2)

104+ where

105+ pattern :: Pattern () Value (Value, Value)

106+ pattern = mkPattern match

107+ where

108+ match (Binary op' v1 v2) | op' == op = Just (v1, v2)

109+ match _ = Nothing

110+

111+prettyPrintValue :: Value -> String

112+prettyPrintValue = fromMaybe (error "Incomplete pattern") . pattern matchValue ()

113+ where

114+ matchValue :: Pattern () Value String

115+ matchValue = buildPrettyPrinter operators (literals <+> fmap parens matchValue)

116+ operators :: OperatorTable () Value String

117+ operators =

118+ OperatorTable [ [ Wrap accessor $ \prop val -> val ++ "." ++ prop ]

119+ , [ Wrap objectUpdate $ \ps val -> val ++ "{ " ++ intercalate ", " ps ++ " }" ]

120+ , [ Wrap app $ \args val -> val ++ "(" ++ args ++ ")" ]

121+ , [ Split lam $ \args val -> "\\" ++ intercalate ", " args ++ " -> " ++ prettyPrintValue val ]

122+ , [ Wrap ifThenElse $ \(th, el) cond -> cond ++ " ? " ++ prettyPrintValue th ++ " : " ++ prettyPrintValue el ]

123+ , [ Wrap typed $ \ty val -> val ++ " :: " ++ prettyPrintType ty ]

124+ , [ AssocR indexer (\index val -> val ++ " !! " ++ index) ]

125+ , [ binary LessThan "<" ]

126+ , [ binary LessThanOrEqualTo "<=" ]

127+ , [ binary GreaterThan ">" ]

128+ , [ binary GreaterThanOrEqualTo ">=" ]

129+ , [ unary Not "!" ]

130+ , [ unary BitwiseNot "~" ]

131+ , [ unary Negate "-" ]

132+ , [ binary Multiply "*" ]

133+ , [ binary Divide "/" ]

134+ , [ binary Modulus "%" ]

135+ , [ binary Concat "++" ]

136+ , [ binary Add "+" ]

137+ , [ binary Subtract "-" ]

138+ , [ binary ShiftLeft "<<" ]

139+ , [ binary ShiftRight ">>" ]

140+ , [ binary ZeroFillShiftRight ">>>" ]

141+ , [ binary EqualTo "==" ]

142+ , [ binary NotEqualTo "!=" ]

143+ , [ binary BitwiseAnd "&" ]

144+ , [ binary BitwiseXor "^" ]

145+ , [ binary BitwiseOr "|" ]

146+ , [ binary And "&&" ]

147+ , [ binary Or "||" ]

148+ ]

149+

150+prettyPrintBinder :: Binder -> String

151+prettyPrintBinder NullBinder = "_"

152+prettyPrintBinder (StringBinder str) = show str

153+prettyPrintBinder (NumberBinder num) = either show show num

154+prettyPrintBinder (BooleanBinder True) = "true"

155+prettyPrintBinder (BooleanBinder False) = "false"

156+prettyPrintBinder (VarBinder ident) = show ident

157+prettyPrintBinder (NullaryBinder ctor) = show ctor

158+prettyPrintBinder (UnaryBinder ctor b) = show ctor ++ prettyPrintBinder b

159+prettyPrintBinder (ObjectBinder bs) = "{ " ++ intercalate ", " (map (uncurry prettyPrintObjectPropertyBinder) bs) ++ " }"

160+prettyPrintBinder (ArrayBinder bs rest) = "[ " ++ intercalate ", " (map prettyPrintBinder bs) ++ maybe "" (("; " ++) . prettyPrintBinder) rest ++ " ]"

161+prettyPrintBinder (NamedBinder ident binder) = show ident ++ "@" ++ prettyPrintBinder binder

162+prettyPrintBinder (GuardedBinder cond binder) = prettyPrintBinder binder ++ " | " ++ prettyPrintValue cond

163+

164+prettyPrintObjectPropertyBinder :: String -> Binder -> String

165+prettyPrintObjectPropertyBinder key binder = key ++ ": " ++ prettyPrintBinder binder

166+

167+prettyPrintObjectProperty :: String -> Value -> String

168+prettyPrintObjectProperty key value = key ++ ": " ++ prettyPrintValue value

169+

170+prettyPrintStatement :: Statement -> String

171+prettyPrintStatement (VariableIntroduction ident value) = "var " ++ show ident ++ " = " ++ prettyPrintValue value

172+prettyPrintStatement (Assignment target value) = show target ++ " = " ++ prettyPrintValue value

173+prettyPrintStatement (While cond sts) = "while " ++ prettyPrintValue cond ++ ": {" ++ intercalate ";" (map prettyPrintStatement sts) ++ " }"

174+prettyPrintStatement (For ident start end sts) = "for " ++ show ident

175+ ++ " <- " ++ prettyPrintValue start

176+ ++ " until " ++ prettyPrintValue end ++ ": {"

177+ ++ intercalate "; " (map prettyPrintStatement sts) ++ " }"

178+prettyPrintStatement (ForEach ident arr sts) = "foreach " ++ show ident

179+ ++ " in " ++ prettyPrintValue arr ++ ": {"

180+ ++ intercalate "; " (map prettyPrintStatement sts) ++ " }"

181+prettyPrintStatement (If ifst) = prettyPrintIfStatement ifst

182+prettyPrintStatement (Return value) = "return " ++ prettyPrintValue value

183+

184+prettyPrintIfStatement :: IfStatement -> String

185+prettyPrintIfStatement (IfStatement cond thens elst) =

186+ "if "

187+ ++ prettyPrintValue cond ++ ": {"

188+ ++ intercalate "; " (map prettyPrintStatement thens) ++ " }"

189+ ++ maybe "" prettyPrintElseStatement elst

190+

191+prettyPrintElseStatement :: ElseStatement -> String

192+prettyPrintElseStatement (Else sts) = "else: {" ++ intercalate "; " (map prettyPrintStatement sts) ++ " }"

193+prettyPrintElseStatement (ElseIf ifst) = "else " ++ prettyPrintIfStatement ifst

src/Language/PureScript/TypeChecker.hsnew file+137

@@ -0,0 +1,137 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.TypeChecker

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE FlexibleInstances #-}

16+

17+module Language.PureScript.TypeChecker (

18+ module T,

19+ typeCheckAll

20+) where

21+

22+import Language.PureScript.TypeChecker.Monad as T

23+import Language.PureScript.TypeChecker.Kinds as T

24+import Language.PureScript.TypeChecker.Types as T

25+import Language.PureScript.TypeChecker.Synonyms as T

26+

27+import Data.List

28+import Data.Maybe

29+import Data.Function

30+import qualified Data.Map as M

31+

32+import Language.PureScript.Values

33+import Language.PureScript.Types

34+import Language.PureScript.Names

35+import Language.PureScript.Kinds

36+import Language.PureScript.Declarations

37+

38+import Control.Monad (forM_)

39+import Control.Monad.State

40+import Control.Monad.Error

41+

42+typeCheckAll :: [Declaration] -> Check ()

43+typeCheckAll [] = return ()

44+typeCheckAll (DataDeclaration name args dctors : rest) = do

45+ rethrow (("Error in type constructor " ++ show name ++ ":\n") ++) $ do

46+ env <- getEnv

47+ modulePath <- checkModulePath `fmap` get

48+ guardWith (show name ++ " is already defined") $ not $ M.member (modulePath, name) (types env)

49+ ctorKind <- kindsOf (Just name) args (mapMaybe snd dctors)

50+ putEnv $ env { types = M.insert (modulePath, name) (ctorKind, Data) (types env) }

51+ forM_ dctors $ \(dctor, maybeTy) ->

52+ rethrow (("Error in data constructor " ++ show name ++ ":\n") ++) $ do

53+ env' <- getEnv

54+ guardWith (show dctor ++ " is already defined") $ not $ M.member (modulePath, dctor) (dataConstructors env')

55+ let retTy = foldl TypeApp (TypeConstructor (Qualified modulePath name)) (map TypeVar args)

56+ let dctorTy = maybe retTy (\ty -> Function [ty] retTy) maybeTy

57+ let polyType = mkForAll args dctorTy

58+ putEnv $ env' { dataConstructors = M.insert (modulePath, dctor) polyType (dataConstructors env') }

59+ typeCheckAll rest

60+typeCheckAll (TypeSynonymDeclaration name args ty : rest) = do

61+ rethrow (("Error in type synonym " ++ show name ++ ":\n") ++) $ do

62+ env <- getEnv

63+ modulePath <- checkModulePath `fmap` get

64+ guardWith (show name ++ " is already defined") $ not $ M.member (modulePath, name) (types env)

65+ kind <- kindsOf (Just name) args [ty]

66+ putEnv $ env { types = M.insert (modulePath, name) (kind, TypeSynonym) (types env)

67+ , typeSynonyms = M.insert (modulePath, name) (args, ty) (typeSynonyms env) }

68+ typeCheckAll rest

69+typeCheckAll (TypeDeclaration name ty : ValueDeclaration name' val : rest) | name == name' =

70+ typeCheckAll (ValueDeclaration name (TypedValue val ty) : rest)

71+typeCheckAll (TypeDeclaration name _ : _) = throwError $ "Orphan type declaration for " ++ show name

72+typeCheckAll (ValueDeclaration name val : rest) = do

73+ rethrow (("Error in declaration " ++ show name ++ ":\n") ++) $ do

74+ env <- getEnv

75+ modulePath <- checkModulePath `fmap` get

76+ case M.lookup (modulePath, name) (names env) of

77+ Just ty -> throwError $ show name ++ " is already defined"

78+ Nothing -> do

79+ ty <- typeOf (Just name) val

80+ putEnv (env { names = M.insert (modulePath, name) (ty, Value) (names env) })

81+ typeCheckAll rest

82+typeCheckAll (ExternDataDeclaration name kind : rest) = do

83+ env <- getEnv

84+ modulePath <- checkModulePath `fmap` get

85+ guardWith (show name ++ " is already defined") $ not $ M.member (modulePath, name) (types env)

86+ putEnv $ env { types = M.insert (modulePath, name) (kind, TypeSynonym) (types env) }

87+ typeCheckAll rest

88+typeCheckAll (ExternMemberDeclaration member name ty : rest) = do

89+ rethrow (("Error in foreign import member declaration " ++ show name ++ ":\n") ++) $ do

90+ env <- getEnv

91+ modulePath <- checkModulePath `fmap` get

92+ kind <- kindOf ty

93+ guardWith "Expected kind *" $ kind == Star

94+ case M.lookup (modulePath, name) (names env) of

95+ Just _ -> throwError $ show name ++ " is already defined"

96+ Nothing -> case ty of

97+ (ForAll _ (Function [_] _)) -> do

98+ putEnv (env { names = M.insert (modulePath, name) (ty, Extern) (names env)

99+ , members = M.insert (modulePath, name) member (members env) })

100+ _ -> throwError "Foreign member declarations must have function types, with an single argument."

101+ typeCheckAll rest

102+typeCheckAll (ExternDeclaration name ty : rest) = do

103+ rethrow (("Error in foreign import declaration " ++ show name ++ ":\n") ++) $ do

104+ env <- getEnv

105+ modulePath <- checkModulePath `fmap` get

106+ kind <- kindOf ty

107+ guardWith "Expected kind *" $ kind == Star

108+ case M.lookup (modulePath, name) (names env) of

109+ Just _ -> throwError $ show name ++ " is already defined"

110+ Nothing -> putEnv (env { names = M.insert (modulePath, name) (ty, Extern) (names env) })

111+ typeCheckAll rest

112+typeCheckAll (FixityDeclaration _ name : rest) = do

113+ typeCheckAll rest

114+ env <- getEnv

115+ modulePath <- checkModulePath `fmap` get

116+ guardWith ("Fixity declaration with no binding: " ++ name) $ M.member (modulePath, Op name) $ names env

117+typeCheckAll (ModuleDeclaration name decls : rest) = do

118+ withModule name $ typeCheckAll decls

119+ typeCheckAll rest

120+typeCheckAll (ImportDeclaration modulePath idents : rest) = do

121+ env <- getEnv

122+ currentModule <- checkModulePath `fmap` get

123+ rethrow errorMessage $ do

124+ guardWith ("Module " ++ show modulePath ++ " does not exist") $ moduleExists env

125+ case idents of

126+ Nothing -> bindIdents (map snd $ filterModule env) currentModule env

127+ Just idents -> bindIdents idents currentModule env

128+ typeCheckAll rest

129+ where errorMessage = (("Error in import declaration " ++ show modulePath ++ ":\n") ++)

130+ filterModule = filter ((== modulePath) . fst) . M.keys . names

131+ moduleExists env = not $ null $ filterModule env

132+ bindIdents idents currentModule env =

133+ forM_ idents $ \ident -> do

134+ guardWith (show currentModule ++ "." ++ show ident ++ " is already defined") $ (currentModule, ident) `M.notMember` names env

135+ case (modulePath, ident) `M.lookup` names env of

136+ Just (pt, _) -> modifyEnv (\e -> e { names = M.insert (currentModule, ident) (pt, Alias modulePath ident) (names e) })

137+ Nothing -> throwError (show modulePath ++ "." ++ show ident ++ " is undefined")

src/Language/PureScript/TypeChecker/Kinds.hsnew file+132

@@ -0,0 +1,132 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.TypeChecker.Kinds

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.TypeChecker.Kinds (

18+ kindsOf,

19+ kindOf

20+) where

21+

22+import Data.List

23+import Data.Maybe (fromMaybe)

24+import Data.Function

25+import Data.Data

26+

27+import Language.PureScript.Types

28+import Language.PureScript.Kinds

29+import Language.PureScript.Names

30+import Language.PureScript.Declarations

31+import Language.PureScript.TypeChecker.Monad

32+import Language.PureScript.Pretty

33+import Language.PureScript.Unknown

34+

35+import Control.Monad.State

36+import Control.Monad.Error

37+

38+import Control.Applicative

39+import Control.Arrow (Kleisli(..), (***))

40+import qualified Control.Category as C

41+

42+import qualified Data.Map as M

43+

44+instance Unifiable Kind where

45+ unknown = KUnknown

46+ isUnknown (KUnknown u) = Just u

47+ isUnknown _ = Nothing

48+ KUnknown u1 ~~ KUnknown u2 | u1 == u2 = return ()

49+ KUnknown u ~~ k = replace u k

50+ k ~~ KUnknown u = replace u k

51+ Star ~~ Star = return ()

52+ Row ~~ Row = return ()

53+ FunKind k1 k2 ~~ FunKind k3 k4 = do

54+ k1 ~~ k3

55+ k2 ~~ k4

56+ k1 ~~ k2 = throwError $ "Cannot unify " ++ prettyPrintKind k1 ++ " with " ++ prettyPrintKind k2 ++ "."

57+ apply s (KUnknown u) = runSubstitution s u

58+ apply s (FunKind k1 k2) = FunKind (apply s k1) (apply s k2)

59+ apply _ k = k

60+ unknowns (KUnknown (Unknown u)) = [u]

61+ unknowns (FunKind k1 k2) = unknowns k1 ++ unknowns k2

62+ unknowns _ = []

63+

64+kindOf :: Type -> Check Kind

65+kindOf ty = fmap (\(k, _, _) -> k) . runSubst $ starIfUnknown <$> infer Nothing M.empty ty

66+

67+kindsOf :: Maybe ProperName -> [String] -> [Type] -> Check Kind

68+kindsOf name args ts = fmap (starIfUnknown . (\(k, _, _) -> k)) . runSubst $ do

69+ tyCon <- fresh

70+ kargs <- replicateM (length args) fresh

71+ ks <- inferAll (fmap (\pn -> (pn, tyCon)) name) (M.fromList (zip args kargs)) ts

72+ tyCon ~~ foldr FunKind Star kargs

73+ forM_ ks $ \k -> k ~~ Star

74+ return tyCon

75+

76+starIfUnknown :: Kind -> Kind

77+starIfUnknown (KUnknown _) = Star

78+starIfUnknown (FunKind k1 k2) = FunKind (starIfUnknown k1) (starIfUnknown k2)

79+starIfUnknown k = k

80+

81+inferAll :: Maybe (ProperName, Kind) -> M.Map String Kind -> [Type] -> Subst Check [Kind]

82+inferAll name m = mapM (infer name m)

83+

84+infer :: Maybe (ProperName, Kind) -> M.Map String Kind -> Type -> Subst Check Kind

85+infer name m (Array t) = do

86+ k <- infer name m t

87+ k ~~ Star

88+ return Star

89+infer name m (Object row) = do

90+ k <- inferRow name m row

91+ k ~~ Row

92+ return Star

93+infer name m (Function args ret) = do

94+ ks <- inferAll name m args

95+ k <- infer name m ret

96+ k ~~ Star

97+ forM ks $ \k -> k ~~ Star

98+ return Star

99+infer _ m (TypeVar v) =

100+ case M.lookup v m of

101+ Just k -> return k

102+ Nothing -> throwError $ "Unbound type variable " ++ v

103+infer (Just (name, k)) m c@(TypeConstructor v@(Qualified (ModulePath []) pn)) | name == pn = return k

104+infer name m (TypeConstructor v) = do

105+ env <- lift getEnv

106+ modulePath <- checkModulePath `fmap` lift get

107+ case M.lookup (qualify modulePath v) (types env) of

108+ Nothing -> throwError $ "Unknown type constructor '" ++ show v ++ "'"

109+ Just (kind, _) -> return kind

110+infer name m (TypeApp t1 t2) = do

111+ k0 <- fresh

112+ k1 <- infer name m t1

113+ k2 <- infer name m t2

114+ k1 ~~ FunKind k2 k0

115+ return k0

116+infer name m (ForAll ident ty) = do

117+ k <- fresh

118+ infer name (M.insert ident k m) ty

119+infer _ m t = return Star

120+

121+inferRow :: Maybe (ProperName, Kind) -> M.Map String Kind -> Row -> Subst Check Kind

122+inferRow _ m (RowVar v) = do

123+ case M.lookup v m of

124+ Just k -> return k

125+ Nothing -> throwError $ "Unbound row variable " ++ v

126+inferRow _ m r@REmpty = return Row

127+inferRow name m r@(RCons _ ty row) = do

128+ k1 <- infer name m ty

129+ k2 <- inferRow name m row

130+ k1 ~~ Star

131+ k2 ~~ Row

132+ return Row

src/Language/PureScript/TypeChecker/Monad.hsnew file+156

@@ -0,0 +1,156 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.TypeChecker.Monad

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE GeneralizedNewtypeDeriving, FlexibleInstances, RankNTypes, DeriveDataTypeable,

16+ GADTs, StandaloneDeriving, MultiParamTypeClasses, FlexibleContexts #-}

17+

18+module Language.PureScript.TypeChecker.Monad where

19+

20+import Language.PureScript.Types

21+import Language.PureScript.Kinds

22+import Language.PureScript.Names

23+import Language.PureScript.Unknown

24+

25+import Data.Data

26+import Data.Maybe

27+import Data.Monoid

28+import Data.Typeable

29+import Control.Applicative

30+import Control.Monad.State

31+import Control.Monad.Error

32+

33+import Control.Arrow ((***), first, second)

34+

35+import qualified Data.Map as M

36+

37+data NameKind = Value | Extern | Alias ModulePath Ident deriving Show

38+

39+data TypeDeclarationKind = Data | ExternData | TypeSynonym deriving Show

40+

41+data Environment = Environment

42+ { names :: M.Map (ModulePath, Ident) (Type, NameKind)

43+ , types :: M.Map (ModulePath, ProperName) (Kind, TypeDeclarationKind)

44+ , dataConstructors :: M.Map (ModulePath, ProperName) Type

45+ , typeSynonyms :: M.Map (ModulePath, ProperName) ([String], Type)

46+ , members :: M.Map (ModulePath, Ident) String

47+ } deriving (Show)

48+

49+emptyEnvironment :: Environment

50+emptyEnvironment = Environment M.empty M.empty M.empty M.empty M.empty

51+

52+data AnyUnifiable where

53+ AnyUnifiable :: forall t. (Unifiable t) => t -> AnyUnifiable

54+

55+data CheckState = CheckState { checkEnv :: Environment

56+ , checkNextVar :: Int

57+ , checkModulePath :: ModulePath

58+ }

59+

60+newtype Check a = Check { unCheck :: StateT CheckState (Either String) a }

61+ deriving (Functor, Monad, Applicative, MonadPlus, MonadState CheckState, MonadError String)

62+

63+getEnv :: Check Environment

64+getEnv = fmap checkEnv get

65+

66+putEnv :: Environment -> Check ()

67+putEnv env = modify (\s -> s { checkEnv = env })

68+

69+modifyEnv :: (Environment -> Environment) -> Check ()

70+modifyEnv f = modify (\s -> s { checkEnv = f (checkEnv s) })

71+

72+runCheck :: Check a -> Either String (a, Environment)

73+runCheck c = do

74+ (a, s) <- flip runStateT (CheckState emptyEnvironment 0 global) $ unCheck c

75+ return (a, checkEnv s)

76+

77+guardWith :: (MonadError e m) => e -> Bool -> m ()

78+guardWith _ True = return ()

79+guardWith e False = throwError e

80+

81+rethrow :: (MonadError e m) => (e -> e) -> m a -> m a

82+rethrow f = flip catchError $ \e -> throwError (f e)

83+

84+withModule :: ProperName -> Check a -> Check a

85+withModule name act = do

86+ original <- checkModulePath `fmap` get

87+ modify $ \s -> s { checkModulePath = subModule (checkModulePath s) name }

88+ a <- act

89+ modify $ \s -> s { checkModulePath = original }

90+ return a

91+

92+newtype Substitution = Substitution { runSubstitution :: forall t. (Unifiable t) => Unknown t -> t }

93+

94+instance Monoid Substitution where

95+ mempty = Substitution unknown

96+ s1 `mappend` s2 = Substitution $ \u -> apply s1 (apply s2 (unknown u))

97+

98+data SubstState = SubstState { substSubst :: Substitution

99+ , substFutureEscapeChecks :: [AnyUnifiable] }

100+

101+newtype Subst m a = Subst { unSubst :: StateT SubstState m a }

102+ deriving (Functor, Monad, Applicative, MonadPlus, MonadTrans)

103+

104+deriving instance (MonadError String m) => MonadError String (Subst m)

105+

106+runSubst :: (Unifiable a, Monad m) => Subst m a -> m (a, Substitution, [AnyUnifiable])

107+runSubst subst = do

108+ (a, s) <- flip runStateT (SubstState mempty []) . unSubst $ subst

109+ return (apply (substSubst s) a, substSubst s, substFutureEscapeChecks s)

110+

111+substituteWith :: (Typeable t) => (Unknown t -> t) -> Substitution

112+substituteWith f = Substitution $ \u -> fromMaybe (unknown u) $ do

113+ u1 <- cast u

114+ cast (f u1)

115+

116+substituteOne :: (Unifiable t) => Unknown t -> t -> Substitution

117+substituteOne u t = substituteWith $ \u1 ->

118+ case u1 of

119+ u2 | u2 == u -> t

120+ | otherwise -> unknown u2

121+

122+replace :: (Unifiable t) => Unknown t -> t -> Subst Check ()

123+replace u t' = do

124+ sub <- substSubst <$> Subst get

125+ let t = apply sub t'

126+ occursCheck u t

127+ let current = apply sub $ unknown u

128+ case isUnknown current of

129+ Just u1 | u1 == u -> return ()

130+ _ -> current ~~ t

131+ Subst . modify $ \s -> s { substSubst = substituteOne u t <> substSubst s }

132+

133+class (Typeable t, Data t, Show t) => Unifiable t where

134+ unknown :: Unknown t -> t

135+ (~~) :: t -> t -> Subst Check ()

136+ isUnknown :: t -> Maybe (Unknown t)

137+ apply :: Substitution -> t -> t

138+ unknowns :: t -> [Int]

139+

140+occursCheck :: (Unifiable t) => Unknown s -> t -> Subst Check ()

141+occursCheck (Unknown u) t =

142+ case isUnknown t of

143+ Nothing -> guardWith "Occurs check fails" (u `notElem` unknowns t)

144+ _ -> return ()

145+

146+fresh' :: Subst Check Int

147+fresh' = do

148+ n <- lift $ checkNextVar <$> get

149+ lift . modify $ \s -> s { checkNextVar = succ (checkNextVar s) }

150+ return n

151+

152+fresh :: (Unifiable t) => Subst Check t

153+fresh = unknown . Unknown <$> fresh'

154+

155+escapeCheckLater :: (Unifiable t) => t -> Subst Check ()

156+escapeCheckLater t = Subst . modify $ \s -> s { substFutureEscapeChecks = AnyUnifiable t : substFutureEscapeChecks s }

src/Language/PureScript/TypeChecker/Synonyms.hsnew file+51

@@ -0,0 +1,51 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.TypeChecker.Synonyms

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Language.PureScript.TypeChecker.Synonyms (

16+ saturateTypeSynonym,

17+ saturateAllTypeSynonyms

18+) where

19+

20+import Language.PureScript.Types

21+import Language.PureScript.Declarations

22+import Language.PureScript.Names

23+

24+import Data.Maybe (fromMaybe)

25+import Data.Data

26+import Data.Generics

27+import Data.Generics.Extras

28+import Control.Arrow

29+import Control.Monad.Writer

30+import Control.Monad.Error

31+import qualified Data.Map as M

32+

33+buildTypeSubstitution :: Qualified ProperName -> Int -> Type -> Either String (Maybe Type)

34+buildTypeSubstitution name n = go n []

35+ where

36+ go :: Int -> [Type] -> Type -> Either String (Maybe Type)

37+ go 0 args (TypeConstructor ctor) | name == ctor = return (Just $ SaturatedTypeSynonym ctor args)

38+ go n _ (TypeConstructor ctor) | n > 0 && name == ctor = throwError $ "Partially applied type synonym " ++ show name

39+ go n args (TypeApp f arg) = go (n - 1) (arg:args) f

40+ go _ _ _ = return Nothing

41+

42+saturateTypeSynonym :: (Data d) => Qualified ProperName -> Int -> d -> Either String d

43+saturateTypeSynonym name n = everywhereM' (mkM replace)

44+ where

45+ replace t = fmap (fromMaybe t) $ buildTypeSubstitution name n t

46+

47+saturateAllTypeSynonyms :: (Data d) => [(Qualified ProperName, Int)] -> d -> Either String d

48+saturateAllTypeSynonyms syns d = foldM (\d (name, n) -> saturateTypeSynonym name n d) d syns

49+

50+

51+

src/Language/PureScript/TypeChecker/Types.hsnew file+724

@@ -0,0 +1,724 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.TypeChecker.Types

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.TypeChecker.Types (

18+ typeOf

19+) where

20+

21+import Data.List

22+import Data.Maybe (isJust, fromMaybe)

23+import Data.Function

24+import qualified Data.Data as D

25+import Data.Generics (everywhere, everywhereM, everything, mkT, mkM, mkQ, extM, extQ)

26+

27+import Language.PureScript.Values

28+import Language.PureScript.Types

29+import Language.PureScript.Kinds

30+import Language.PureScript.Names

31+import Language.PureScript.TypeChecker.Monad

32+import Language.PureScript.TypeChecker.Kinds

33+import Language.PureScript.TypeChecker.Synonyms

34+import Language.PureScript.Pretty

35+import Language.PureScript.Unknown

36+

37+import Control.Monad.State

38+import Control.Monad.Error

39+

40+import Control.Applicative

41+import Control.Arrow (Arrow(..), Kleisli(..), (***), (&&&), second)

42+import qualified Control.Category as C

43+

44+import qualified Data.Map as M

45+

46+instance Unifiable Type where

47+ unknown = TUnknown

48+ isUnknown (TUnknown u) = Just u

49+ isUnknown _ = Nothing

50+ TUnknown u1 ~~ TUnknown u2 | u1 == u2 = return ()

51+ TUnknown u ~~ t = replace u t

52+ t ~~ TUnknown u = replace u t

53+ SaturatedTypeSynonym name1 args1 ~~ SaturatedTypeSynonym name2 args2 | name1 == name2 =

54+ zipWithM_ (~~) args1 args2

55+ SaturatedTypeSynonym name args ~~ ty = do

56+ env <- lift getEnv

57+ modulePath <- checkModulePath `fmap` lift get

58+ case M.lookup (qualify modulePath name) (typeSynonyms env) of

59+ Just (synArgs, body) -> do

60+ let m = M.fromList $ zip synArgs args

61+ let replaced = replaceTypeVars m body

62+ replaced ~~ ty

63+ Nothing -> error "Type synonym was not defined"

64+ ty ~~ s@(SaturatedTypeSynonym _ _) = s ~~ ty

65+ ForAll ident1 ty1 ~~ ForAll ident2 ty2 = do

66+ sk <- skolemize ident1 ty1

67+ replaced <- replaceVarsWithUnknowns [ident2] ty2

68+ sk ~~ replaced

69+ ForAll ident ty1 ~~ ty2 = do

70+ sk <- skolemize ident ty1

71+ sk ~~ ty2

72+ ty ~~ f@(ForAll _ _) = f ~~ ty

73+ Number ~~ Number = return ()

74+ String ~~ String = return ()

75+ Boolean ~~ Boolean = return ()

76+ Array s ~~ Array t = s ~~ t

77+ Object row1 ~~ Object row2 = row1 ~~ row2

78+ Function args1 ret1 ~~ Function args2 ret2 = do

79+ guardWith "Function applied to incorrect number of args" $ length args1 == length args2

80+ zipWithM_ (~~) args1 args2

81+ ret1 ~~ ret2

82+ TypeVar v1 ~~ TypeVar v2 | v1 == v2 = return ()

83+ TypeConstructor c1 ~~ TypeConstructor c2 = do

84+ modulePath <- checkModulePath `fmap` lift get

85+ guardWith ("Cannot unify " ++ show c1 ++ " with " ++ show c2 ++ ".") (qualify modulePath c1 == qualify modulePath c2)

86+ TypeApp t1 t2 ~~ TypeApp t3 t4 = do

87+ t1 ~~ t3

88+ t2 ~~ t4

89+ Skolem s1 ~~ Skolem s2 | s1 == s2 = return ()

90+ t1 ~~ t2 = throwError $ "Cannot unify " ++ prettyPrintType t1 ++ " with " ++ prettyPrintType t2 ++ "."

91+ apply s (TUnknown u) = runSubstitution s u

92+ apply s (SaturatedTypeSynonym name tys) = SaturatedTypeSynonym name $ map (apply s) tys

93+ apply s (ForAll idents ty) = ForAll idents $ apply s ty

94+ apply s (Array t) = Array (apply s t)

95+ apply s (Object r) = Object (apply s r)

96+ apply s (Function args ret) = Function (map (apply s) args) (apply s ret)

97+ apply s (TypeApp t1 t2) = TypeApp (apply s t1) (apply s t2)

98+ apply _ t = t

99+ unknowns (TUnknown (Unknown u)) = [u]

100+ unknowns (SaturatedTypeSynonym _ tys) = concatMap unknowns tys

101+ unknowns (ForAll idents ty) = unknowns ty

102+ unknowns (Array t) = unknowns t

103+ unknowns (Object r) = unknowns r

104+ unknowns (Function args ret) = concatMap unknowns args ++ unknowns ret

105+ unknowns (TypeApp t1 t2) = unknowns t1 ++ unknowns t2

106+ unknowns _ = []

107+

108+instance Unifiable Row where

109+ unknown = RUnknown

110+ isUnknown (RUnknown u) = Just u

111+ isUnknown _ = Nothing

112+ r1 ~~ r2 =

113+ let

114+ (s1, r1') = rowToList r1

115+ (s2, r2') = rowToList r2

116+ int = [ (t1, t2) | (name, t1) <- s1, (name', t2) <- s2, name == name' ]

117+ sd1 = [ (name, t1) | (name, t1) <- s1, name `notElem` map fst s2 ]

118+ sd2 = [ (name, t2) | (name, t2) <- s2, name `notElem` map fst s1 ]

119+ in do

120+ forM_ int (uncurry (~~))

121+ unifyRows sd1 r1' sd2 r2'

122+ where

123+ unifyRows :: [(String, Type)] -> Row -> [(String, Type)] -> Row -> Subst Check ()

124+ unifyRows [] (RUnknown u) sd r = replace u (rowFromList (sd, r))

125+ unifyRows sd r [] (RUnknown u) = replace u (rowFromList (sd, r))

126+ unifyRows ns@((name, ty):row) r others u@(RUnknown un) = do

127+ occursCheck un ty

128+ forM row $ \(_, ty) -> occursCheck un ty

129+ u' <- fresh

130+ u ~~ RCons name ty u'

131+ unifyRows row r others u'

132+ unifyRows [] REmpty [] REmpty = return ()

133+ unifyRows [] (RowVar v1) [] (RowVar v2) | v1 == v2 = return ()

134+ unifyRows [] (RSkolem s1) [] (RSkolem s2) | s1 == s2 = return ()

135+ unifyRows sd1 r1 sd2 r2 = throwError $ "Cannot unify " ++ prettyPrintRow (rowFromList (sd1, r1)) ++ " with " ++ prettyPrintRow (rowFromList (sd2, r2)) ++ "."

136+ apply s (RUnknown u) = runSubstitution s u

137+ apply s (RCons name ty r) = RCons name (apply s ty) (apply s r)

138+ apply _ r = r

139+ unknowns (RUnknown (Unknown u)) = [u]

140+ unknowns (RCons _ ty r) = unknowns ty ++ unknowns r

141+ unknowns _ = []

142+

143+isFunction :: Value -> Bool

144+isFunction (Abs _ _) = True

145+isFunction (TypedValue untyped _) = isFunction untyped

146+isFunction _ = False

147+

148+typeOf :: Maybe Ident -> Value -> Check Type

149+typeOf name val = do

150+ (ty, sub, checks) <- runSubst $ case name of

151+ Just ident | isFunction val ->

152+ do me <- fresh

153+ ty <- infer (M.singleton ident me) val

154+ me ~~ ty

155+ return ty

156+ _ -> infer M.empty val

157+ escapeCheck checks ty sub

158+ return $ varIfUnknown $ desaturateAllTypeSynonyms $ setifyAll ty

159+

160+escapeCheck :: [AnyUnifiable] -> Type -> Substitution -> Check ()

161+escapeCheck checks ty sub =

162+ let

163+ visibleUnknowns = nub $ unknowns ty

164+ in

165+ forM_ checks $ \check -> case check of

166+ AnyUnifiable t -> do

167+ let unsolvedUnknowns = nub . unknowns $ apply sub t

168+ guardWith "Escape check fails" $ null $ unsolvedUnknowns \\ visibleUnknowns

169+

170+setify :: Row -> Row

171+setify = rowFromList . first (M.toList . M.fromList) . rowToList

172+

173+setifyAll :: (D.Data d) => d -> d

174+setifyAll = everywhere (mkT setify)

175+

176+findTypeVars :: (D.Data d) => d -> [String]

177+findTypeVars = everything (++) (mkQ [] f)

178+ where

179+ f :: Type -> [String]

180+ f (TypeVar v) = [v]

181+ f _ = []

182+

183+varIfUnknown :: Type -> Type

184+varIfUnknown ty =

185+ let

186+ (ty', m) = flip runState M.empty $ everywhereM (flip extM g $ mkM f) ty

187+ in

188+ mkForAll (sort $ nub $ M.elems m ++ findTypeVars ty) ty'

189+ where

190+ f :: Type -> State (M.Map Int String) Type

191+ f (TUnknown (Unknown n)) = do

192+ m <- get

193+ case M.lookup n m of

194+ Nothing -> do

195+ let name = 't' : show (M.size m)

196+ put $ M.insert n name m

197+ return $ TypeVar name

198+ Just name -> return $ TypeVar name

199+ f t = return t

200+ g :: Row -> State (M.Map Int String) Row

201+ g (RUnknown (Unknown n)) = do

202+ m <- get

203+ case M.lookup n m of

204+ Nothing -> do

205+ let name = 'r' : show (M.size m)

206+ put $ M.insert n name m

207+ return $ RowVar name

208+ Just name -> return $ RowVar name

209+ g r = return r

210+

211+replaceTypeVars :: M.Map String Type -> Type -> Type

212+replaceTypeVars m = everywhere (mkT replace)

213+ where

214+ replace (TypeVar v) = case M.lookup v m of

215+ Just ty -> ty

216+ _ -> TypeVar v

217+ replace t = t

218+

219+replaceRowVars :: M.Map String Row -> Type -> Type

220+replaceRowVars m = everywhere (mkT replace)

221+ where

222+ replace (RowVar v) = case M.lookup v m of

223+ Just r -> r

224+ _ -> RowVar v

225+ replace t = t

226+

227+replaceVarsWithUnknowns :: [String] -> Type -> Subst Check Type

228+replaceVarsWithUnknowns idents = flip evalStateT M.empty . everywhereM (flip extM f $ mkM g)

229+ where

230+ f :: Type -> StateT (M.Map String Int) (Subst Check) Type

231+ f (TypeVar var) | var `elem` idents = do

232+ m <- get

233+ n <- lift fresh'

234+ case M.lookup var m of

235+ Nothing -> do

236+ put (M.insert var n m)

237+ return $ TUnknown (Unknown n)

238+ Just u -> return $ TUnknown (Unknown u)

239+ f t = return t

240+ g :: Row -> StateT (M.Map String Int) (Subst Check) Row

241+ g (RowVar var) | var `elem` idents = do

242+ m <- get

243+ n <- lift fresh'

244+ case M.lookup var m of

245+ Nothing -> do

246+ put (M.insert var n m)

247+ return $ RUnknown (Unknown n)

248+ Just u -> return $ RUnknown (Unknown u)

249+ g r = return r

250+

251+replaceAllTypeSynonyms :: (D.Data d) => d -> Check d

252+replaceAllTypeSynonyms d = do

253+ env <- getEnv

254+ let syns = map (\((path, name), (args, _)) -> (Qualified path name, length args)) . M.toList $ typeSynonyms env

255+ either throwError return $ saturateAllTypeSynonyms syns d

256+

257+desaturateAllTypeSynonyms :: (D.Data d) => d -> d

258+desaturateAllTypeSynonyms = everywhere (mkT replace)

259+ where

260+ replace (SaturatedTypeSynonym name args) = foldl TypeApp (TypeConstructor name) args

261+ replace t = t

262+

263+ensureNoDuplicateProperties :: [(String, Value)] -> Check ()

264+ensureNoDuplicateProperties ps = guardWith "Duplicate property names" $ length (nub . map fst $ ps) == length ps

265+

266+infer :: M.Map Ident Type -> Value -> Subst Check Type

267+infer m val = rethrow (\e -> "Error inferring type of term " ++ prettyPrintValue val ++ ":\n" ++ e) $ do

268+ ty <- infer' m val

269+ escapeCheckLater ty

270+ return ty

271+

272+infer' _ (NumericLiteral _) = return Number

273+infer' _ (StringLiteral _) = return String

274+infer' _ (BooleanLiteral _) = return Boolean

275+infer' m (ArrayLiteral vals) = do

276+ ts <- mapM (infer m) vals

277+ arr <- fresh

278+ forM_ ts $ \t -> arr ~~ Array t

279+ return arr

280+infer' m (Unary op val) = do

281+ t <- infer m val

282+ inferUnary op t

283+infer' m (Binary op left right) = do

284+ t1 <- infer m left

285+ t2 <- infer m right

286+ inferBinary op t1 t2

287+infer' m (ObjectLiteral ps) = do

288+ lift $ ensureNoDuplicateProperties ps

289+ ts <- mapM (infer m . snd) ps

290+ let fields = zipWith (\(name, _) t -> (name, t)) ps ts

291+ return $ Object $ typesToRow fields

292+infer' m (ObjectUpdate o ps) = do

293+ lift $ ensureNoDuplicateProperties ps

294+ obj <- infer m o

295+ row <- fresh

296+ ts <- mapM (infer m . snd) ps

297+ let tys = zipWith (\(name, _) t -> (name, t)) ps ts

298+ obj ~~ Object (rowFromList (tys, row))

299+ return obj

300+infer' m (Indexer index val) = do

301+ el <- fresh

302+ check m index Number

303+ check m val (Array el)

304+ return el

305+infer' m (Accessor prop val) = do

306+ field <- fresh

307+ rest <- fresh

308+ check m val (Object (RCons prop field rest))

309+ return field

310+infer' m (Abs args ret) = do

311+ ts <- replicateM (length args) fresh

312+ let m' = m `M.union` M.fromList (zip args ts)

313+ body <- infer m' ret

314+ return $ Function ts body

315+infer' m (App f xs) = do

316+ t1 <- infer m f

317+ ret <- fresh

318+ checkFunctionApplication m t1 xs ret

319+ return ret

320+infer' m (Var var@(Qualified mp name)) = do

321+ case mp of

322+ ModulePath [] ->

323+ case M.lookup name m of

324+ Just ty -> lift $ replaceAllTypeSynonyms ty

325+ Nothing -> lookupGlobal

326+ _ -> lookupGlobal

327+ where

328+ lookupGlobal = do

329+ env <- lift getEnv

330+ modulePath <- checkModulePath `fmap` lift get

331+ case M.lookup (qualify modulePath var) (names env) of

332+ Nothing -> throwError $ show var ++ " is undefined"

333+ Just (ty, _) -> lift $ replaceAllTypeSynonyms ty

334+infer' m (Block ss) = do

335+ ret <- fresh

336+ (allCodePathsReturn, _) <- checkBlock m M.empty ret ss

337+ guardWith "Block is missing a return statement" allCodePathsReturn

338+ return ret

339+infer' m (Constructor c) = do

340+ env <- lift getEnv

341+ modulePath <- checkModulePath `fmap` lift get

342+ case M.lookup (qualify modulePath c) (dataConstructors env) of

343+ Nothing -> throwError $ "Constructor " ++ show c ++ " is undefined"

344+ Just ty -> lift $ replaceAllTypeSynonyms ty

345+infer' m (Case val binders) = do

346+ t1 <- infer m val

347+ ret <- fresh

348+ checkBinders m t1 ret binders

349+ return ret

350+infer' m (IfThenElse cond th el) = do

351+ check m cond Boolean

352+ t2 <- infer m th

353+ t3 <- infer m el

354+ t2 ~~ t3

355+ return t2

356+infer' m (TypedValue val ty) = do

357+ kind <- lift $ kindOf ty

358+ guardWith ("Expected type of kind *, was " ++ prettyPrintKind kind) $ kind == Star

359+ ty' <- lift $ replaceAllTypeSynonyms ty

360+ check m val ty'

361+ return ty'

362+

363+inferUnary :: UnaryOperator -> Type -> Subst Check Type

364+inferUnary op val =

365+ case fromMaybe (error "Invalid operator") $ lookup op unaryOps of

366+ (valTy, resTy) -> do

367+ val ~~ valTy

368+ return resTy

369+

370+checkUnary :: M.Map Ident Type -> UnaryOperator -> Value -> Type -> Subst Check ()

371+checkUnary m op val res =

372+ case fromMaybe (error "Invalid operator") $ lookup op unaryOps of

373+ (valTy, resTy) -> do

374+ res ~~ resTy

375+ check m val valTy

376+

377+unaryOps :: [(UnaryOperator, (Type, Type))]

378+unaryOps = [ (Negate, (Number, Number))

379+ , (Not, (Boolean, Boolean))

380+ , (BitwiseNot, (Number, Number))

381+ ]

382+

383+inferBinary :: BinaryOperator -> Type -> Type -> Subst Check Type

384+inferBinary op left right | isEqualityTest op = do

385+ left ~~ right

386+ return Boolean

387+inferBinary op left right =

388+ case fromMaybe (error "Invalid operator") $ lookup op binaryOps of

389+ (valTy, resTy) -> do

390+ left ~~ valTy

391+ right ~~ valTy

392+ return resTy

393+

394+checkBinary :: M.Map Ident Type -> BinaryOperator -> Value -> Value -> Type -> Subst Check ()

395+checkBinary m op left right res | isEqualityTest op = do

396+ res ~~ Boolean

397+ t1 <- infer m left

398+ t2 <- infer m right

399+ t1 ~~ t2

400+checkBinary m op left right res =

401+ case fromMaybe (error "Invalid operator") $ lookup op binaryOps of

402+ (valTy, resTy) -> do

403+ res ~~ resTy

404+ check m left valTy

405+ check m right valTy

406+

407+isEqualityTest :: BinaryOperator -> Bool

408+isEqualityTest EqualTo = True

409+isEqualityTest NotEqualTo = True

410+isEqualityTest _ = False

411+

412+binaryOps :: [(BinaryOperator, (Type, Type))]

413+binaryOps = [ (Add, (Number, Number))

414+ , (Subtract, (Number, Number))

415+ , (Multiply, (Number, Number))

416+ , (Divide, (Number, Number))

417+ , (Modulus, (Number, Number))

418+ , (BitwiseAnd, (Number, Number))

419+ , (BitwiseOr, (Number, Number))

420+ , (BitwiseXor, (Number, Number))

421+ , (ShiftRight, (Number, Number))

422+ , (ZeroFillShiftRight, (Number, Number))

423+ , (And, (Boolean, Boolean))

424+ , (Or, (Boolean, Boolean))

425+ , (Concat, (String, String))

426+ , (Modulus, (Number, Number))

427+ , (LessThan, (Number, Boolean))

428+ , (LessThanOrEqualTo, (Number, Boolean))

429+ , (GreaterThan, (Number, Boolean))

430+ , (GreaterThanOrEqualTo, (Number, Boolean))

431+ ]

432+

433+inferBinder :: Type -> Binder -> Subst Check (M.Map Ident Type)

434+inferBinder _ NullBinder = return M.empty

435+inferBinder val (StringBinder _) = val ~~ String >> return M.empty

436+inferBinder val (NumberBinder _) = val ~~ Number >> return M.empty

437+inferBinder val (BooleanBinder _) = val ~~ Boolean >> return M.empty

438+inferBinder val (VarBinder name) = return $ M.singleton name val

439+inferBinder val (NullaryBinder ctor) = do

440+ env <- lift getEnv

441+ modulePath <- checkModulePath `fmap` lift get

442+ case M.lookup (qualify modulePath ctor) (dataConstructors env) of

443+ Just ty -> do

444+ ty `subsumes` val

445+ return M.empty

446+ _ -> throwError $ "Constructor " ++ show ctor ++ " is not defined"

447+inferBinder val (UnaryBinder ctor binder) = do

448+ env <- lift getEnv

449+ modulePath <- checkModulePath `fmap` lift get

450+ case M.lookup (qualify modulePath ctor) (dataConstructors env) of

451+ Just ty -> do

452+ obj <- fresh

453+ ty `subsumes` (Function [obj] val)

454+ inferBinder obj binder

455+ _ -> throwError $ "Constructor " ++ show ctor ++ " is not defined"

456+inferBinder val (ObjectBinder props) = do

457+ row <- fresh

458+ rest <- fresh

459+ m1 <- inferRowProperties row rest props

460+ val ~~ Object row

461+ return m1

462+ where

463+ inferRowProperties :: Row -> Row -> [(String, Binder)] -> Subst Check (M.Map Ident Type)

464+ inferRowProperties nrow row [] = nrow ~~ row >> return M.empty

465+ inferRowProperties nrow row ((name, binder):binders) = do

466+ propTy <- fresh

467+ m1 <- inferBinder propTy binder

468+ m2 <- inferRowProperties nrow (RCons name propTy row) binders

469+ return $ m1 `M.union` m2

470+inferBinder val (ArrayBinder binders rest) = do

471+ el <- fresh

472+ m1 <- M.unions <$> mapM (inferBinder el) binders

473+ val ~~ Array el

474+ case rest of

475+ Nothing -> return m1

476+ Just binder -> do

477+ m2 <- inferBinder val binder

478+ return $ m1 `M.union` m2

479+inferBinder val (NamedBinder name binder) = do

480+ m <- inferBinder val binder

481+ return $ M.insert name val m

482+

483+inferGuardedBinder :: M.Map Ident Type -> Type -> Binder -> Subst Check (M.Map Ident Type)

484+inferGuardedBinder m val (GuardedBinder cond binder) = do

485+ m1 <- inferBinder val binder

486+ ty <- infer (m `M.union` m1) cond

487+ ty ~~ Boolean

488+ return m1

489+inferGuardedBinder m val b = inferBinder val b >>= return

490+

491+checkBinders :: M.Map Ident Type -> Type -> Type -> [(Binder, Value)] -> Subst Check ()

492+checkBinders _ _ _ [] = return ()

493+checkBinders m nval ret ((binder, val):bs) = do

494+ m1 <- inferGuardedBinder m nval binder

495+ check (m `M.union` m1) val ret

496+ checkBinders m nval ret bs

497+

498+assignVariable :: Ident -> M.Map Ident Type -> Subst Check ()

499+assignVariable name m =

500+ case M.lookup name m of

501+ Nothing -> return ()

502+ Just _ -> throwError $ "Variable with name " ++ show name ++ " already exists."

503+

504+checkStatement :: M.Map Ident Type -> M.Map Ident Type -> Type -> Statement -> Subst Check (Bool, M.Map Ident Type)

505+checkStatement m mass ret (VariableIntroduction name val) = do

506+ assignVariable name (m `M.union` mass)

507+ t <- infer m val

508+ return (False, M.insert name t mass)

509+checkStatement m mass ret (Assignment ident val) = do

510+ t <- infer m val

511+ case M.lookup ident mass of

512+ Nothing -> throwError $ "No local variable with name " ++ show ident

513+ Just ty -> do t ~~ ty

514+ return (False, mass)

515+checkStatement m mass ret (While val inner) = do

516+ check m val Boolean

517+ (allCodePathsReturn, _) <- checkBlock m mass ret inner

518+ return (allCodePathsReturn, mass)

519+checkStatement m mass ret (If ifst) = do

520+ allCodePathsReturn <- checkIfStatement m mass ret ifst

521+ return (allCodePathsReturn, mass)

522+checkStatement m mass ret (For ident start end inner) = do

523+ assignVariable ident (m `M.union` mass)

524+ check (m `M.union` mass) start Number

525+ check (m `M.union` mass) end Number

526+ let mass1 = M.insert ident Number mass

527+ (allCodePathsReturn, _) <- checkBlock (m `M.union` mass1) mass1 ret inner

528+ return (allCodePathsReturn, mass)

529+checkStatement m mass ret (ForEach ident vals inner) = do

530+ assignVariable ident (m `M.union` mass)

531+ val <- fresh

532+ check (m `M.union` mass) vals (Array val)

533+ let mass1 = M.insert ident val mass

534+ (allCodePathsReturn, _) <- checkBlock (m `M.union` mass1) mass1 ret inner

535+ guardWith "Cannot return from within a foreach block" $ not allCodePathsReturn

536+ return (False, mass)

537+checkStatement m mass ret (Return val) = do

538+ check (m `M.union` mass) val ret

539+ return (True, mass)

540+

541+checkIfStatement :: M.Map Ident Type -> M.Map Ident Type -> Type -> IfStatement -> Subst Check Bool

542+checkIfStatement m mass ret (IfStatement val thens Nothing) = do

543+ check m val Boolean

544+ _ <- checkBlock m mass ret thens

545+ return False

546+checkIfStatement m mass ret (IfStatement val thens (Just elses)) = do

547+ check m val Boolean

548+ (allCodePathsReturn1, _) <- checkBlock m mass ret thens

549+ allCodePathsReturn2 <- checkElseStatement m mass ret elses

550+ return $ allCodePathsReturn1 && allCodePathsReturn2

551+

552+checkElseStatement :: M.Map Ident Type -> M.Map Ident Type -> Type -> ElseStatement -> Subst Check Bool

553+checkElseStatement m mass ret (Else elses) = fst <$> checkBlock m mass ret elses

554+checkElseStatement m mass ret (ElseIf ifst) = checkIfStatement m mass ret ifst

555+

556+checkBlock :: M.Map Ident Type -> M.Map Ident Type -> Type -> [Statement] -> Subst Check (Bool, M.Map Ident Type)

557+checkBlock _ mass _ [] = return (False, mass)

558+checkBlock m mass ret (s:ss) = do

559+ (b1, mass1) <- checkStatement (m `M.union` mass) mass ret s

560+ case (b1, ss) of

561+ (True, []) -> return (True, mass1)

562+ (True, _) -> throwError "Unreachable code"

563+ (False, ss) -> do

564+ (b2, mass2) <- checkBlock m mass1 ret ss

565+ return (b2, mass2)

566+

567+skolemize :: String -> Type -> Subst Check Type

568+skolemize ident ty = do

569+ tsk <- Skolem <$> fresh'

570+ rsk <- RSkolem <$> fresh'

571+ return $ replaceRowVars (M.singleton ident rsk) $ replaceTypeVars (M.singleton ident tsk) ty

572+

573+check :: M.Map Ident Type -> Value -> Type -> Subst Check ()

574+check m val ty = rethrow errorMessage $ check' m val ty

575+ where

576+ errorMessage msg =

577+ "Error checking type of term " ++

578+ prettyPrintValue val ++

579+ " against type " ++

580+ prettyPrintType ty ++

581+ ":\n" ++

582+ msg

583+

584+check' :: M.Map Ident Type -> Value -> Type -> Subst Check ()

585+check' m val (ForAll idents ty) = do

586+ sk <- skolemize idents ty

587+ check m val sk

588+check' m val (SaturatedTypeSynonym name args) = do

589+ env <- lift getEnv

590+ modulePath <- checkModulePath `fmap` lift get

591+ case M.lookup (qualify modulePath name) (typeSynonyms env) of

592+ Just (synArgs, body) -> do

593+ let replaced = replaceTypeVars (M.fromList (zip synArgs args)) body

594+ check m val replaced

595+ Nothing -> error "Type synonym was not defined"

596+check' m val u@(TUnknown _) = do

597+ ty <- infer m val

598+ ty ~~ u

599+check' m (NumericLiteral _) Number = return ()

600+check' m (StringLiteral _) String = return ()

601+check' m (BooleanLiteral _) Boolean = return ()

602+check' m (Unary op val) ty = checkUnary m op val ty

603+check' m (Binary op left right) ty = checkBinary m op left right ty

604+check' m (ArrayLiteral vals) (Array ty) = forM_ vals (\val -> check m val ty)

605+check' m (Indexer index vals) ty = check m index Number >> check m vals (Array ty)

606+check' m (Abs args ret) (Function argTys retTy) = do

607+ guardWith "Incorrect number of function arguments" (length args == length argTys)

608+ let bindings = M.fromList (zip args argTys)

609+ check (bindings `M.union` m) ret retTy

610+check' m (App f xs) ret = do

611+ ft <- infer m f

612+ checkFunctionApplication m ft xs ret

613+check' m v@(Var var@(Qualified mp name)) ty = do

614+ case mp of

615+ ModulePath [] ->

616+ case M.lookup name m of

617+ Just ty1 -> do

618+ repl <- lift $ replaceAllTypeSynonyms ty1

619+ repl `subsumes` ty

620+ Nothing -> lookupGlobal

621+ _ -> lookupGlobal

622+ where

623+ lookupGlobal = do

624+ env <- lift getEnv

625+ modulePath <- checkModulePath `fmap` lift get

626+ case M.lookup (qualify modulePath var) (names env) of

627+ Nothing -> throwError $ show var ++ " is undefined"

628+ Just (ty1, _) -> do

629+ repl <- lift $ replaceAllTypeSynonyms ty1

630+ repl `subsumes` ty

631+check' m (TypedValue val ty1) ty2 = do

632+ kind <- lift $ kindOf ty1

633+ guardWith ("Expected type of kind *, was " ++ prettyPrintKind kind) $ kind == Star

634+ ty1 `subsumes` ty2

635+ check m val ty1

636+check' m (Case val binders) ret = do

637+ t1 <- infer m val

638+ checkBinders m t1 ret binders

639+check' m (IfThenElse cond th el) ty = do

640+ check m cond Boolean

641+ check m th ty

642+ check m el ty

643+check' m (ObjectLiteral ps) (Object row) = do

644+ lift $ ensureNoDuplicateProperties ps

645+ checkProperties m ps row False

646+check' m (ObjectUpdate obj ps) objTy@(Object row) = do

647+ lift $ ensureNoDuplicateProperties ps

648+ check m obj objTy

649+ checkProperties m ps row True

650+check' m (Accessor prop val) ty = do

651+ rest <- fresh

652+ check m val (Object (RCons prop ty rest))

653+check' m (Block ss) ret = do

654+ (allCodePathsReturn, _) <- checkBlock m M.empty ret ss

655+ guardWith "Block is missing a return statement" allCodePathsReturn

656+check' m (Constructor c) ty = do

657+ env <- lift getEnv

658+ modulePath <- checkModulePath `fmap` lift get

659+ case M.lookup (qualify modulePath c) (dataConstructors env) of

660+ Nothing -> throwError $ "Constructor " ++ show c ++ " is undefined"

661+ Just ty1 -> do

662+ repl <- lift $ replaceAllTypeSynonyms ty1

663+ repl `subsumes` ty

664+check' _ val ty = throwError $ prettyPrintValue val ++ " does not have type " ++ prettyPrintType ty

665+

666+checkProperties :: M.Map Ident Type -> [(String, Value)] -> Row -> Bool -> Subst Check ()

667+checkProperties m ps row lax = let (ts, r') = rowToList row in go ps ts r' where

668+ go [] [] REmpty = return ()

669+ go [] [] u@(RUnknown _) = u ~~ REmpty

670+ go [] [] (RSkolem _) | lax = return ()

671+ go [] ((p, _): _) _ | lax = return ()

672+ | otherwise = throwError $ prettyPrintValue (ObjectLiteral ps) ++ " does not have property " ++ p

673+ go ((p,_):_) [] REmpty = throwError $ "Property " ++ p ++ " is not present in closed object type " ++ prettyPrintRow row

674+ go ((p,v):ps) [] u@(RUnknown _) = do

675+ ty <- infer m v

676+ rest <- fresh

677+ u ~~ RCons p ty rest

678+ go ps [] rest

679+ go ((p,v):ps) ts r =

680+ case lookup p ts of

681+ Nothing -> do

682+ ty <- infer m v

683+ rest <- fresh

684+ r ~~ RCons p ty rest

685+ go ps ts rest

686+ Just ty -> do

687+ check m v ty

688+ go ps (delete (p, ty) ts) r

689+ go _ _ _ = throwError $ prettyPrintValue (ObjectLiteral ps) ++ " does not have type " ++ prettyPrintType (Object row)

690+

691+checkFunctionApplication :: M.Map Ident Type -> Type -> [Value] -> Type -> Subst Check ()

692+checkFunctionApplication m fnTy args ret = rethrow errorMessage $ checkFunctionApplication' m fnTy args ret

693+ where

694+ errorMessage msg = "Error applying function of type "

695+ ++ prettyPrintType fnTy

696+ ++ " to arguments " ++ intercalate ", " (map prettyPrintValue args)

697+ ++ ", expecting value of type "

698+ ++ prettyPrintType ret ++ ":\n" ++ msg

699+

700+checkFunctionApplication' :: M.Map Ident Type -> Type -> [Value] -> Type -> Subst Check ()

701+checkFunctionApplication' m (Function argTys retTy) args ret = do

702+ guardWith "Incorrect number of function arguments" (length args == length argTys)

703+ zipWithM (check m) args argTys

704+ retTy `subsumes` ret

705+checkFunctionApplication' m (ForAll ident ty) args ret = do

706+ replaced <- replaceVarsWithUnknowns [ident] ty

707+ checkFunctionApplication m replaced args ret

708+checkFunctionApplication' m u@(TUnknown _) args ret = do

709+ tyArgs <- mapM (infer m) args

710+ u `subsumes` Function tyArgs ret

711+checkFunctionApplication' _ fnTy args ret = throwError $ "Cannot apply function of type "

712+ ++ prettyPrintType fnTy

713+ ++ " to arguments " ++ intercalate ", " (map prettyPrintValue args)

714+ ++ ". Expecting value of type " ++ prettyPrintType ret ++ "."

715+

716+subsumes :: Type -> Type -> Subst Check ()

717+subsumes (ForAll ident ty1) ty2 = do

718+ replaced <- replaceVarsWithUnknowns [ident] ty1

719+ replaced `subsumes` ty2

720+subsumes (Function args1 ret1) (Function args2 ret2) = do

721+ zipWithM subsumes args2 args1

722+ ret1 `subsumes` ret2

723+subsumes ty1 ty2 = ty1 ~~ ty2

724+

src/Language/PureScript/Types.hsnew file+74

@@ -0,0 +1,74 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Types

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.Types where

18+

19+import Data.Data

20+import Language.PureScript.Names

21+import Language.PureScript.Unknown (Unknown(..))

22+

23+data Type

24+ = TUnknown (Unknown Type)

25+ | Number

26+ | String

27+ | Boolean

28+ | Array Type

29+ | Object Row

30+ | Function [PolyType] Type

31+ | TypeVar String

32+ | TypeConstructor (Qualified ProperName)

33+ | TypeApp Type Type

34+ | SaturatedTypeSynonym (Qualified ProperName) [Type]

35+ | ForAll String Type

36+ | Skolem Int deriving (Show, Eq, Data, Typeable)

37+

38+type PolyType = Type

39+

40+data Row

41+ = RUnknown (Unknown Row)

42+ | RowVar String

43+ | REmpty

44+ | RCons String Type Row

45+ | RSkolem Int deriving (Show, Eq, Data, Typeable)

46+

47+typesToRow :: [(String, Type)] -> Row

48+typesToRow [] = REmpty

49+typesToRow ((name, ty):tys) = RCons name ty (typesToRow tys)

50+

51+rowToList :: Row -> ([(String, Type)], Row)

52+rowToList (RCons name ty row) = let (tys, rest) = rowToList row

53+ in ((name, ty):tys, rest)

54+rowToList r = ([], r)

55+

56+rowFromList :: ([(String, Type)], Row) -> Row

57+rowFromList ([], r) = r

58+rowFromList ((name, t):ts, r) = RCons name t (rowFromList (ts, r))

59+

60+isMonoType :: Type -> Bool

61+isMonoType (ForAll _ _) = False

62+isMonoType ty = isPolyType ty

63+

64+isPolyType :: Type -> Bool

65+isPolyType (Array ty) = isMonoType ty

66+isPolyType (Object ps) = all isMonoType (map snd . fst $ rowToList ps)

67+isPolyType (Function args ret) = all isPolyType args && isMonoType ret

68+isPolyType (TypeApp t1 t2) = isMonoType t1 && isMonoType t2

69+isPolyType (SaturatedTypeSynonym _ args) = all isMonoType args

70+isPolyType (ForAll idents ty) = isPolyType ty

71+isPolyType _ = True

72+

73+mkForAll :: [String] -> Type -> Type

74+mkForAll = flip . foldl . flip $ ForAll

src/Language/PureScript/Unknown.hsnew file+25

@@ -0,0 +1,25 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Unknown

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.Unknown where

18+

19+import Data.Data

20+import Data.Typeable

21+

22+newtype Unknown t = Unknown { runUnknown :: Int } deriving (Show, Eq, Ord, Data, Typeable)

23+

24+

25+

src/Language/PureScript/Values.hsnew file+99

@@ -0,0 +1,99 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Language.PureScript.Values

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+{-# LANGUAGE DeriveDataTypeable #-}

16+

17+module Language.PureScript.Values where

18+

19+import Language.PureScript.Types

20+import Language.PureScript.Names

21+

22+import Data.Data

23+

24+data UnaryOperator

25+ = Negate

26+ | Not

27+ | BitwiseNot deriving (Show, Eq, Data, Typeable)

28+

29+data BinaryOperator

30+ = Add

31+ | Subtract

32+ | Multiply

33+ | Divide

34+ | Modulus

35+ | EqualTo

36+ | NotEqualTo

37+ | LessThan

38+ | LessThanOrEqualTo

39+ | GreaterThan

40+ | GreaterThanOrEqualTo

41+ | And

42+ | Or

43+ | BitwiseAnd

44+ | BitwiseOr

45+ | BitwiseXor

46+ | ShiftLeft

47+ | ShiftRight

48+ | ZeroFillShiftRight

49+ | Concat deriving (Show, Eq, Data, Typeable)

50+

51+data Value

52+ = NumericLiteral (Either Integer Double)

53+ | StringLiteral String

54+ | BooleanLiteral Bool

55+ | Unary UnaryOperator Value

56+ | Binary BinaryOperator Value Value

57+ | BinaryNoParens (Qualified Ident) Value Value

58+ | Parens Value

59+ | ArrayLiteral [Value]

60+ | Indexer Value Value

61+ | ObjectLiteral [(String, Value)]

62+ | Accessor String Value

63+ | ObjectUpdate Value [(String, Value)]

64+ | Abs [Ident] Value

65+ | App Value [Value]

66+ | Var (Qualified Ident)

67+ | IfThenElse Value Value Value

68+ | Block [Statement]

69+ | Constructor (Qualified ProperName)

70+ | Case Value [(Binder, Value)]

71+ | TypedValue Value PolyType deriving (Show, Data, Typeable)

72+

73+data Statement

74+ = VariableIntroduction Ident Value

75+ | Assignment Ident Value

76+ | While Value [Statement]

77+ | For Ident Value Value [Statement]

78+ | ForEach Ident Value [Statement]

79+ | If IfStatement

80+ | Return Value deriving (Show, Data, Typeable)

81+

82+data IfStatement = IfStatement Value [Statement] (Maybe ElseStatement) deriving (Show, Data, Typeable)

83+

84+data ElseStatement

85+ = Else [Statement]

86+ | ElseIf IfStatement deriving (Show, Data, Typeable)

87+

88+data Binder

89+ = NullBinder

90+ | BooleanBinder Bool

91+ | StringBinder String

92+ | NumberBinder (Either Integer Double)

93+ | VarBinder Ident

94+ | NullaryBinder (Qualified ProperName)

95+ | UnaryBinder (Qualified ProperName) Binder

96+ | ObjectBinder [(String, Binder)]

97+ | ArrayBinder [Binder] (Maybe Binder)

98+ | NamedBinder Ident Binder

99+ | GuardedBinder Value Binder deriving (Show, Data, Typeable)

src/Main.hsnew file+73

@@ -0,0 +1,73 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Main

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Main where

16+

17+import qualified Language.PureScript as P

18+import Data.Maybe (mapMaybe)

19+import Data.List (intercalate)

20+import System.Console.CmdTheLine

21+import Control.Applicative

22+import Control.Monad (forM)

23+import System.Exit (exitSuccess, exitFailure)

24+import qualified Text.Parsec as P

25+import qualified System.IO.UTF8 as U

26+import qualified Data.Map as M

27+

28+compile :: [FilePath] -> Maybe FilePath -> Maybe FilePath -> IO ()

29+compile inputFiles outputFile externsFile = do

30+ asts <- fmap (fmap concat . sequence) $ forM inputFiles $ \inputFile -> do

31+ text <- U.readFile inputFile

32+ return $ P.runIndentParser P.parseDeclarations text

33+ case asts of

34+ Left err -> do

35+ U.print err

36+ exitFailure

37+ Right decls ->

38+ case P.compile decls of

39+ Left error -> do

40+ U.putStrLn error

41+ exitFailure

42+ Right (js, exts, _) -> do

43+ case outputFile of

44+ Just path -> U.writeFile path js

45+ Nothing -> U.putStrLn js

46+ case externsFile of

47+ Nothing -> return ()

48+ Just filePath -> U.writeFile filePath exts

49+ exitSuccess

50+

51+inputFiles :: Term [FilePath]

52+inputFiles = nonEmpty $ posAny [] $ posInfo

53+ { posDoc = "The input .ps files" }

54+

55+outputFile :: Term (Maybe FilePath)

56+outputFile = value $ opt Nothing $ (optInfo [ "o", "output" ])

57+ { optDoc = "The output .js file" }

58+

59+externsFile :: Term (Maybe FilePath)

60+externsFile = value $ opt Nothing $ (optInfo [ "e", "externs" ])

61+ { optDoc = "The output .e.ps file" }

62+

63+term :: Term (IO ())

64+term = compile <$> inputFiles <*> outputFile <*> externsFile

65+

66+termInfo :: TermInfo

67+termInfo = defTI

68+ { termName = "psc"

69+ , version = "1.0"

70+ , termDoc = "Compiles PureScript to Javascript"

71+ }

72+

73+main = run (term, termInfo)

src/Tests.hsdeleted−141

@@ -1,141 +0,0 @@

1−module Tests (runTests) where

2−

3−import Prelude.Compat

4−import Data.List

5−import Control.Applicative

6−import Control.Monad

7−

8−import System.Process

9−import System.FilePath

10−import System.IO

11−import System.Directory

12−

13−-------------------------------------------------------------------------------

14−testsDir :: IO (FilePath, FilePath)

15−-------------------------------------------------------------------------------

16−testsDir = do

17− baseDir <- getCurrentDirectory

18− return (baseDir </> "purescript-tests", baseDir)

19−

20−-------------------------------------------------------------------------------

21−runTests :: IO ()

22−-------------------------------------------------------------------------------

23−runTests = do

24−

25− (outputDir, baseDir) <- testsDir

26−

27− outputDirExists <- doesDirectoryExist outputDir

28− when outputDirExists $ removeDirectoryRecursive outputDir

29− createDirectory outputDir

30−

31− let srcDir = outputDir </> "src"

32− createDirectory srcDir

33−

34− callProcess "git" ["clone", "--branch", "v0.13.8", "--depth", "1", "https://github.com/purescript/purescript.git"]

35− let passingDir = baseDir </> "purescript" </> "tests" </> "purs" </> "passing"

36− passingTestCases <- sort . filter (".purs" `isSuffixOf`) <$> getDirectoryContents passingDir

37−

38− setCurrentDirectory outputDir

39−

40− fetchPackages

41−

42− let tests = filter (`notElem` skipped) passingTestCases

43−

44− tmp <- getTemporaryDirectory

45− createDirectoryIfMissing False (tmp </> logpath)

46− outputFile <- openFile (tmp </> logpath </> logfile) WriteMode

47− hClose outputFile

48−

49− -- Run the tests

50− --

51− forM_ tests $ \inputFile -> do

52− --

53− -- Compile/build

54− --

55− putStrLn $ "Compiling test " ++ inputFile ++ " ..."

56− setCurrentDirectory outputDir

57− copyFile (passingDir </> inputFile) (srcDir </> inputFile)

58−

59− let testCaseDir = passingDir </> (takeWhile (/='.') inputFile)

60− testCaseDirExists <- doesDirectoryExist testCaseDir

61− when testCaseDirExists $ callProcess "cp" ["-R", testCaseDir, srcDir]

62−

63− callProcess "rm" ["-rf", "output"]

64− callProcess "rm" ["-rf", "Main"]

65− callProcess "spago" ["build"]

66− --

67− -- Run executable file

68− --

69− outputFile <- openFile (tmp </> logpath </> logfile) AppendMode

70− hPutStrLn outputFile ("\n" ++ inputFile ++ ":")

71− proc <- runProcess ("./" </> "Main") [] Nothing Nothing Nothing (Just outputFile) Nothing

72−

73− removeFile (srcDir </> inputFile)

74− when testCaseDirExists $ callProcess "rm" ["-rf", srcDir </> (takeWhile (/='.') inputFile)]

75−

76− -- TODO: support failing test cases

77− --

78− -- let failing = baseDir </> "examples" </> "failing"

79− -- failingTestCases <- sort . filter (".purs" `isSuffixOf`) <$> getDirectoryContents failing

80− --

81−

82− setCurrentDirectory baseDir

83− putStrLn "PureScript tests finished"

84− putStrLn $ "Total tests available: " ++ show (length passingTestCases)

85− putStrLn $ "Tests run: " ++ show (length tests)

86− putStrLn $ "Tests skipped: " ++ show (length skipped)

87−

88−-------------------------------------------------------------------------------

89−packages :: [String]

90−-------------------------------------------------------------------------------

91−packages =

92− [ "arrays"

93− , "assert"

94− , "console"

95− , "control"

96− , "effect"

97− , "foldable-traversable"

98− , "functions"

99− , "generics-rep"

100− , "invariant"

101− , "newtype"

102− , "partial"

103− , "prelude"

104− , "proxy"

105− , "refs"

106− , "st"

107− , "type-equality"

108− , "typelevel-prelude"

109− ]

110−

111−-------------------------------------------------------------------------------

112−fetchPackages :: IO ()

113−-------------------------------------------------------------------------------

114−fetchPackages = do

115− callProcess "spago" ["init"]

116− callCommand "sed '$s/\$}\$/, backend = \"psgo\"\\1/' < spago.dhall | dhall format > spago.tmp"

117− callCommand "mv spago.tmp spago.dhall"

118−

119− mapM (callProcess "spago" . (\p -> ["install", p])) packages

120− return ()

121−

122−-------------------------------------------------------------------------------

123−skipped :: [String]

124−-------------------------------------------------------------------------------

125−skipped =

126− [ "2172.purs" -- foreign in Main needed (test manually)

127− , "EffFn.purs" -- foreign in Main needed (test manually)

128− , "FunWithFunDeps.purs" -- foreign in Main needed (test manually)

129− , "NumberLiterals.purs" -- unreliable float string comparison (test manually)

130− , "PolyLabels.purs" -- foreign in Main needed (test manually)

131− , "RowUnion.purs" -- foreign in Main needed (test manually)

132− , "ShadowedModuleName.purs" -- ?

133− , "StringEdgeCases.purs" -- javascript char encoding specific

134− , "StringEscapes.purs" -- Partially javascript-char-encoding-specific (test manually)

135− ]

136−

137−logpath :: FilePath

138−logpath = "purescript-output"

139−

140−logfile :: FilePath

141−logfile = "purescript-tests.out"

stack.nixdeleted−23

@@ -1,23 +0,0 @@

1−#

2−# You may need to manually run `unset STACK_IN_NIX_SHELL`

3−# (doesn't work from a `shellHook`; see: https://github.com/commercialhaskell/stack/issues/5000

4−#

5−#

6−# You may need to set LC_ALL when building, e.g.

7−# LC_ALL=en_US.iso88591 stack --nix build; see e.g. https://github.com/koalaman/shellcheck/issues/324

8−#

9−#

10−{ pkgs ?

11− import (builtins.fetchTarball {

12− name = "nixos-release-19.03";

13− url = https://github.com/nixos/nixpkgs/archive/34c7eb7545d155cc5b6f499b23a7cb1c96ab4d59.tar.gz;

14− sha256 = "11z6ajj108fy2q5g8y4higlcaqncrbjm3dnv17pvif6avagw4mcb";

15− }) {}

16−}:

17−

18−pkgs.haskell.lib.buildStackProject {

19− name = "default-stack-shell";

20− ghc = pkgs.haskell.compiler.ghc865;

21− buildInputs = with pkgs; [git git-lfs gmp ncurses zlib];

22− LANG = "en_US.UTF-8";

23−}

stack.yamldeleted−24

@@ -1,24 +0,0 @@

1−resolver: lts-13.26

2−

3−packages:

4−- .

5−

6−extra-deps:

7−- git: https://github.com/purescript/purescript

8− commit: 9cad73ed8ea7df3011032ddbd2f3de5a0c08629c

9−- happy-1.19.9

10−- language-javascript-0.7.0.0

11−- network-3.0.1.1

12−- these-1.0.1

13−- semialign-1

14−

15−nix:

16− enable: false

17− shell-file: stack.nix

18−

19−flags:

20− aeson-pretty:

21− lib-only: true

22− these:

23− assoc: false

24− quickcheck: false

support/ffi-loader.godeleted−30

@@ -1,30 +0,0 @@

1−package ffi_loader

2−

3−// Load PureScript standard library FFI packages. Comment out the ones you don't need for

4−// faster/smaller builds.

5−

6−import (

7− _ "github.com/purescript-native/go-ffi/purescript-arrays"

8− _ "github.com/purescript-native/go-ffi/purescript-assert"

9− _ "github.com/purescript-native/go-ffi/purescript-console"

10− _ "github.com/purescript-native/go-ffi/purescript-effect"

11− _ "github.com/purescript-native/go-ffi/purescript-enums"

12− _ "github.com/purescript-native/go-ffi/purescript-exceptions"

13− _ "github.com/purescript-native/go-ffi/purescript-foldable-traversable"

14− _ "github.com/purescript-native/go-ffi/purescript-functions"

15− _ "github.com/purescript-native/go-ffi/purescript-globals"

16− _ "github.com/purescript-native/go-ffi/purescript-integers"

17− _ "github.com/purescript-native/go-ffi/purescript-lazy"

18− _ "github.com/purescript-native/go-ffi/purescript-math"

19− _ "github.com/purescript-native/go-ffi/purescript-partial"

20− _ "github.com/purescript-native/go-ffi/purescript-prelude"

21− _ "github.com/purescript-native/go-ffi/purescript-random"

22− _ "github.com/purescript-native/go-ffi/purescript-refs"

23− _ "github.com/purescript-native/go-ffi/purescript-st"

24− _ "github.com/purescript-native/go-ffi/purescript-strings"

25− _ "github.com/purescript-native/go-ffi/purescript-unfoldable"

26−)

27−

28−// Add your own FFI packages here.

29−

30−import ()

support/go.mod.ffi-loaderdeleted−2

@@ -1,2 +0,0 @@

1−module $PROJECT/purescript-native/ffi-loader

2−

support/go.mod.outputdeleted−2

@@ -1,2 +0,0 @@

1−module $PROJECT/purescript-native/output

2−

support/go.mod.workingdeleted−1

@@ -1 +0,0 @@

1−module $PROJECT/example

test/Spec.hsdeleted−2

@@ -1,2 +0,0 @@

1−main :: IO ()

2−main = putStrLn "Test suite not yet implemented"

tests/Main.hsnew file+70

@@ -0,0 +1,70 @@

1+-----------------------------------------------------------------------------

2+--

3+-- Module : Main

4+-- Copyright : (c) Phil Freeman 2013

5+-- License : MIT

6+--

7+-- Maintainer : Phil Freeman <paf31@cantab.net>

8+-- Stability : experimental

9+-- Portability :

10+--

11+-- |

12+--

13+-----------------------------------------------------------------------------

14+

15+module Main (main) where

16+

17+import qualified Language.PureScript as P

18+

19+import Data.List (isSuffixOf)

20+import Control.Applicative

21+import Control.Monad

22+import System.Exit (exitSuccess, exitFailure)

23+import System.FilePath (pathSeparator)

24+import System.Directory (getCurrentDirectory, getDirectoryContents)

25+import qualified System.IO.UTF8 as U

26+import qualified Data.Map as M

27+

28+compile :: FilePath -> IO (Either String P.Environment)

29+compile inputFile = do

30+ ast <- P.runIndentParser P.parseDeclarations <$> U.readFile inputFile

31+ case ast of

32+ Left parseError -> do

33+ return (Left $ show parseError)

34+ Right decls -> do

35+ case P.compile decls of

36+ Left typeError -> do

37+ return (Left typeError)

38+ Right (_, _, env) -> do

39+ return (Right env)

40+

41+assert :: FilePath -> (Either String P.Environment -> Maybe String) -> IO ()

42+assert inputFile f = do

43+ e <- compile inputFile

44+ case f e of

45+ Just err -> exitFailure

46+ Nothing -> return ()

47+

48+assertCompiles :: FilePath -> IO ()

49+assertCompiles inputFile = do

50+ putStrLn $ "assert " ++ inputFile ++ " compiles successfully"

51+ assert inputFile $ either Just (const Nothing)

52+

53+assertDoesNotCompile :: FilePath -> IO ()

54+assertDoesNotCompile inputFile = do

55+ putStrLn $ "assert " ++ inputFile ++ " does not compile"

56+ assert inputFile $ either (const Nothing) (const $ Just "Should not have compiled")

57+

58+main :: IO ()

59+main = do

60+ cd <- getCurrentDirectory

61+ let examples = cd ++ pathSeparator : "examples"

62+ let passing = examples ++ pathSeparator : "passing"

63+ passingTestCases <- getDirectoryContents passing

64+ forM_ passingTestCases $ \inputFile -> when (".ps" `isSuffixOf` inputFile) $

65+ assertCompiles (passing ++ pathSeparator : inputFile)

66+ let failing = examples ++ pathSeparator : "failing"

67+ failingTestCases <- getDirectoryContents failing

68+ forM_ failingTestCases $ \inputFile -> when (".ps" `isSuffixOf` inputFile) $

69+ assertDoesNotCompile (failing ++ pathSeparator : inputFile)

70+ exitSuccess