git.iko.soy/Idris-dev
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Idris-dev/src/IRTS/CodegenJavaScript.hs
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1{-# LANGUAGE PatternGuards #-}
3module IRTS.CodegenJavaScript (codegenJavaScript, JSTarget(..)) where
5import Idris.AbsSyntax
6import IRTS.Bytecode
7import IRTS.Lang
8import IRTS.Simplified
9import IRTS.CodegenCommon
10import Core.TT
11import Paths_idris
12import Util.System
14import Control.Arrow
15import Data.Char
16import Data.List
17import qualified Data.Map as Map
18import System.IO
19import System.Directory
21idrNamespace :: String
22idrNamespace = "__IDR__"
23idrRTNamespace = "__IDRRT__"
25data JSTarget = Node | JavaScript deriving Eq
27codegenJavaScript
28 :: JSTarget
29 -> [(Name, SDecl)]
30 -> FilePath
31 -> OutputType
32 -> IO ()
33codegenJavaScript target definitions filename outputType = do
34 let (header, runtime) = case target of
35 Node ->
36 ("#!/usr/bin/env node\n", "-node")
37 JavaScript ->
38 ("", "-browser")
39 path <- getDataDir
40 idrRuntime <- readFile $ path ++ "/js/Runtime-common.js"
41 tgtRuntime <- readFile $ concat [path, "/js/Runtime", runtime, ".js"]
42 writeFile filename ( header
43 ++ idrRuntime
44 ++ tgtRuntime
45 ++ functions
46 ++ mainLoop)
48 setPermissions filename (emptyPermissions { readable = True
49 , executable = target == Node
50 , writable = True
51 })
52 where
53 def = map (first translateNamespace) definitions
55 functions = concatMap translateDeclaration def
57 mainLoop :: String
58 mainLoop = intercalate "\n" [ "\nfunction main() {"
59 , createTailcall "__IDR__runMain0()"
60 , "}\n\nmain();\n"
61 ]
63translateIdentifier :: String -> String
64translateIdentifier =
65 replaceReserved . concatMap replaceBadChars
66 where replaceBadChars :: Char -> String
67 replaceBadChars c
68 | ' ' <- c = "_"
69 | '_' <- c = "__"
70 | isDigit c = "_" ++ [c] ++ "_"
71 | not (isLetter c && isAscii c) = '_' : show (ord c)
72 | otherwise = [c]
73 replaceReserved s
74 | s `elem` reserved = '_' : s
75 | otherwise = s
76 reserved = [ "break"
77 , "case"
78 , "catch"
79 , "continue"
80 , "debugger"
81 , "default"
82 , "delete"
83 , "do"
84 , "else"
85 , "finally"
86 , "for"
87 , "function"
88 , "if"
89 , "in"
90 , "instanceof"
91 , "new"
92 , "return"
93 , "switch"
94 , "this"
95 , "throw"
96 , "try"
97 , "typeof"
98 , "var"
99 , "void"
100 , "while"
101 , "with"
103 , "class"
104 , "enum"
105 , "export"
106 , "extends"
107 , "import"
108 , "super"
110 , "implements"
111 , "interface"
112 , "let"
113 , "package"
114 , "private"
115 , "protected"
116 , "public"
117 , "static"
118 , "yield"
119 ]
121translateNamespace :: Name -> [String]
122translateNamespace (UN _) = [idrNamespace]
123translateNamespace (NS _ ns) = idrNamespace : map translateIdentifier ns
124translateNamespace (MN _ _) = [idrNamespace]
126translateName :: Name -> String
127translateName (UN name) = translateIdentifier name
128translateName (NS name _) = translateName name
129translateName (MN i name) = translateIdentifier name ++ show i
131translateConstant :: Const -> String
132translateConstant (I i) = show i
133translateConstant (BI i) = idrRTNamespace ++ "bigInt('" ++ show i ++ "')"
134translateConstant (Fl f) = show f
135translateConstant (Ch c) = show c
136translateConstant (Str s) = show s
137translateConstant (AType (ATInt ITNative)) = idrRTNamespace ++ "Int"
138translateConstant StrType = idrRTNamespace ++ "String"
139translateConstant (AType (ATInt ITBig)) = idrRTNamespace ++ "Integer"
140translateConstant (AType ATFloat) = idrRTNamespace ++ "Float"
141translateConstant PtrType = idrRTNamespace ++ "Ptr"
142translateConstant Forgot = idrRTNamespace ++ "Forgot"
143translateConstant c =
144 "(function(){throw 'Unimplemented Const: " ++ show c ++ "';})()"
146translateParameterlist =
147 map translateParameter
148 where translateParameter (MN i name) = translateIdentifier name ++ show i
149 translateParameter (UN name) = translateIdentifier name
151translateDeclaration :: (String, SDecl) -> String
152translateDeclaration (path, SFun name params stackSize body) =
153 "var " ++ concat (path ++ [translateName name])
154 ++ " = function("
155 ++ intercalate "," p
156 ++ "){\n"
157 ++ concatMap assignVar (zip [0..] p)
158 ++ concatMap allocVar [numP..(numP+stackSize-1)]
159 ++ "return "
160 ++ translateExpression body
161 ++ ";\n};\n"
162 where
163 numP :: Int
164 numP = length params
166 allocVar :: Int -> String
167 allocVar n = "var __var_" ++ show n ++ ";\n"
169 assignVar :: (Int, String) -> String
170 assignVar (n, s) = "var __var_" ++ show n ++ " = " ++ s ++ ";\n"
172 p :: [String]
173 p = translateParameterlist params
175translateVariableName :: LVar -> String
176translateVariableName (Loc i) =
177 "__var_" ++ show i
179translateExpression :: SExp -> String
180translateExpression (SLet name value body) =
181 "(function("
182 ++ translateVariableName name
183 ++ "){\nreturn "
184 ++ translateExpression body
185 ++ ";\n})("
186 ++ translateExpression value
187 ++ ")"
189translateExpression (SConst cst) =
190 translateConstant cst
192translateExpression (SV var) =
193 translateVariableName var
195translateExpression (SApp False name vars) =
196 createTailcall $ translateFunctionCall name vars
198translateExpression (SApp True name vars) =
199 "new " ++ idrRTNamespace ++ "Tailcall("
200 ++ "function(){\n"
201 ++ "return " ++ translateFunctionCall name vars
202 ++ ";\n})"
204translateExpression (SOp op vars)
205 | LNoOp <- op = translateVariableName (last vars) ++ "/* NOOP */"
207 | (LPlus (ATInt ITBig)) <- op
208 , (lhs:rhs:_) <- vars = translateBinaryOp ".add(" lhs rhs ++ ")"
209 | (LMinus (ATInt ITBig)) <- op
210 , (lhs:rhs:_) <- vars = translateBinaryOp ".minus(" lhs rhs ++ ")"
211 | (LTimes (ATInt ITBig)) <- op
212 , (lhs:rhs:_) <- vars = translateBinaryOp ".times(" lhs rhs ++ ")"
213 | (LSDiv (ATInt ITBig)) <- op
214 , (lhs:rhs:_) <- vars = translateBinaryOp ".divide(" lhs rhs ++ ")"
215 | (LSRem (ATInt ITBig)) <- op
216 , (lhs:rhs:_) <- vars = translateBinaryOp ".mod(" lhs rhs ++ ")"
217 | (LEq (ATInt ITBig)) <- op
218 , (lhs:rhs:_) <- vars = translateBinaryOp ".equals(" lhs rhs ++ ")"
219 | (LLt (ATInt ITBig)) <- op
220 , (lhs:rhs:_) <- vars = translateBinaryOp ".lesser(" lhs rhs ++ ")"
221 | (LLe (ATInt ITBig)) <- op
222 , (lhs:rhs:_) <- vars = translateBinaryOp ".lesserOrEquals(" lhs rhs ++ ")"
223 | (LGt (ATInt ITBig)) <- op
224 , (lhs:rhs:_) <- vars = translateBinaryOp ".greater(" lhs rhs ++ ")"
225 | (LGe (ATInt ITBig)) <- op
226 , (lhs:rhs:_) <- vars = translateBinaryOp ".greaterOrEquals(" lhs rhs ++ ")"
228 | (LPlus ATFloat) <- op
229 , (lhs:rhs:_) <- vars = translateBinaryOp "+" lhs rhs
230 | (LMinus ATFloat) <- op
231 , (lhs:rhs:_) <- vars = translateBinaryOp "-" lhs rhs
232 | (LTimes ATFloat) <- op
233 , (lhs:rhs:_) <- vars = translateBinaryOp "*" lhs rhs
234 | (LSDiv ATFloat) <- op
235 , (lhs:rhs:_) <- vars = translateBinaryOp "/" lhs rhs
236 | (LEq ATFloat) <- op
237 , (lhs:rhs:_) <- vars = translateBinaryOp "==" lhs rhs
238 | (LLt ATFloat) <- op
239 , (lhs:rhs:_) <- vars = translateBinaryOp "<" lhs rhs
240 | (LLe ATFloat) <- op
241 , (lhs:rhs:_) <- vars = translateBinaryOp "<=" lhs rhs
242 | (LGt ATFloat) <- op
243 , (lhs:rhs:_) <- vars = translateBinaryOp ">" lhs rhs
244 | (LGe ATFloat) <- op
245 , (lhs:rhs:_) <- vars = translateBinaryOp ">=" lhs rhs
247 | (LPlus _) <- op
248 , (lhs:rhs:_) <- vars = translateBinaryOp "+" lhs rhs
249 | (LMinus _) <- op
250 , (lhs:rhs:_) <- vars = translateBinaryOp "-" lhs rhs
251 | (LTimes _) <- op
252 , (lhs:rhs:_) <- vars = translateBinaryOp "*" lhs rhs
253 | (LSDiv _) <- op
254 , (lhs:rhs:_) <- vars = translateBinaryOp "/" lhs rhs
255 | (LSRem _) <- op
256 , (lhs:rhs:_) <- vars = translateBinaryOp "%" lhs rhs
257 | (LEq _) <- op
258 , (lhs:rhs:_) <- vars = translateBinaryOp "==" lhs rhs
259 | (LLt _) <- op
260 , (lhs:rhs:_) <- vars = translateBinaryOp "<" lhs rhs
261 | (LLe _) <- op
262 , (lhs:rhs:_) <- vars = translateBinaryOp "<=" lhs rhs
263 | (LGt _) <- op
264 , (lhs:rhs:_) <- vars = translateBinaryOp ">" lhs rhs
265 | (LGe _) <- op
266 , (lhs:rhs:_) <- vars = translateBinaryOp ">=" lhs rhs
267 | (LAnd _) <- op
268 , (lhs:rhs:_) <- vars = translateBinaryOp "&" lhs rhs
269 | (LOr _) <- op
270 , (lhs:rhs:_) <- vars = translateBinaryOp "|" lhs rhs
271 | (LXOr _) <- op
272 , (lhs:rhs:_) <- vars = translateBinaryOp "^" lhs rhs
273 | (LSHL _) <- op
274 , (lhs:rhs:_) <- vars = translateBinaryOp "<<" rhs lhs
275 | (LASHR _) <- op
276 , (lhs:rhs:_) <- vars = translateBinaryOp ">>" rhs lhs
277 | (LCompl _) <- op
278 , (arg:_) <- vars = '~' : translateVariableName arg
280 | LStrConcat <- op
281 , (lhs:rhs:_) <- vars = translateBinaryOp "+" lhs rhs
282 | LStrEq <- op
283 , (lhs:rhs:_) <- vars = translateBinaryOp "==" lhs rhs
284 | LStrLt <- op
285 , (lhs:rhs:_) <- vars = translateBinaryOp "<" lhs rhs
286 | LStrLen <- op
287 , (arg:_) <- vars = translateVariableName arg ++ ".length"
289 | (LStrInt ITNative) <- op
290 , (arg:_) <- vars = "parseInt(" ++ translateVariableName arg ++ ")"
291 | (LIntStr ITNative) <- op
292 , (arg:_) <- vars = "String(" ++ translateVariableName arg ++ ")"
293 | (LSExt ITNative ITBig) <- op
294 , (arg:_) <- vars = idrRTNamespace ++ "bigInt(" ++ translateVariableName arg ++ ")"
295 | (LTrunc ITBig ITNative) <- op
296 , (arg:_) <- vars = translateVariableName arg ++ ".valueOf()"
297 | (LIntStr ITBig) <- op
298 , (arg:_) <- vars = translateVariableName arg ++ ".toString()"
299 | (LStrInt ITBig) <- op
300 , (arg:_) <- vars = idrRTNamespace ++ "bigInt(" ++ translateVariableName arg ++ ")"
301 | LFloatStr <- op
302 , (arg:_) <- vars = "String(" ++ translateVariableName arg ++ ")"
303 | LStrFloat <- op
304 , (arg:_) <- vars = "parseFloat(" ++ translateVariableName arg ++ ")"
305 | (LIntFloat ITNative) <- op
306 , (arg:_) <- vars = translateVariableName arg
307 | (LFloatInt ITNative) <- op
308 , (arg:_) <- vars = translateVariableName arg
309 | (LChInt ITNative) <- op
310 , (arg:_) <- vars = translateVariableName arg ++ ".charCodeAt(0)"
311 | (LIntCh ITNative) <- op
312 , (arg:_) <- vars =
313 "String.fromCharCode(" ++ translateVariableName arg ++ ")"
315 | LFExp <- op
316 , (arg:_) <- vars = "Math.exp(" ++ translateVariableName arg ++ ")"
317 | LFLog <- op
318 , (arg:_) <- vars = "Math.log(" ++ translateVariableName arg ++ ")"
319 | LFSin <- op
320 , (arg:_) <- vars = "Math.sin(" ++ translateVariableName arg ++ ")"
321 | LFCos <- op
322 , (arg:_) <- vars = "Math.cos(" ++ translateVariableName arg ++ ")"
323 | LFTan <- op
324 , (arg:_) <- vars = "Math.tan(" ++ translateVariableName arg ++ ")"
325 | LFASin <- op
326 , (arg:_) <- vars = "Math.asin(" ++ translateVariableName arg ++ ")"
327 | LFACos <- op
328 , (arg:_) <- vars = "Math.acos(" ++ translateVariableName arg ++ ")"
329 | LFATan <- op
330 , (arg:_) <- vars = "Math.atan(" ++ translateVariableName arg ++ ")"
331 | LFSqrt <- op
332 , (arg:_) <- vars = "Math.sqrt(" ++ translateVariableName arg ++ ")"
333 | LFFloor <- op
334 , (arg:_) <- vars = "Math.floor(" ++ translateVariableName arg ++ ")"
335 | LFCeil <- op
336 , (arg:_) <- vars = "Math.ceil(" ++ translateVariableName arg ++ ")"
338 | LStrCons <- op
339 , (lhs:rhs:_) <- vars = translateBinaryOp "+" lhs rhs
340 | LStrHead <- op
341 , (arg:_) <- vars = translateVariableName arg ++ "[0]"
342 | LStrRev <- op
343 , (arg:_) <- vars = let v = translateVariableName arg in
344 v ++ ".split('').reverse().join('')"
345 | LStrIndex <- op
346 , (lhs:rhs:_) <- vars = let l = translateVariableName lhs
347 r = translateVariableName rhs in
348 l ++ "[" ++ r ++ "]"
349 | LStrTail <- op
350 , (arg:_) <- vars = let v = translateVariableName arg in
351 v ++ ".substr(1," ++ v ++ ".length-1)"
352 where
353 translateBinaryOp :: String -> LVar -> LVar -> String
354 translateBinaryOp f lhs rhs =
355 translateVariableName lhs
356 ++ f
357 ++ translateVariableName rhs
359translateExpression (SError msg) =
360 "(function(){throw \'" ++ msg ++ "\';})()"
362translateExpression (SForeign _ _ "putStr" [(FString, var)]) =
363 idrRTNamespace ++ "print(" ++ translateVariableName var ++ ")"
365translateExpression (SForeign _ _ fun args)
366 | "[]=" `isSuffixOf` fun
367 , (obj:idx:val:[]) <- args =
368 concat [object obj, index idx, assign val]
370 | "[]" `isSuffixOf` fun
371 , (obj:idx:[]) <- args =
372 object obj ++ index idx
374 | "[" `isPrefixOf` fun && "]=" `isSuffixOf` fun
375 , (obj:val:[]) <- args =
376 concat [object obj, '[' : name ++ "]", assign val]
378 | "[" `isPrefixOf` fun && "]" `isSuffixOf` fun
379 , (obj:[]) <- args =
380 object obj ++ '[' : name ++ "]"
382 | "." `isPrefixOf` fun, "=" `isSuffixOf` fun
383 , (obj:val:[]) <- args =
384 concat [object obj, field, assign val]
386 | "." `isPrefixOf` fun
387 , (obj:[]) <- args =
388 object obj ++ field
390 | "." `isPrefixOf` fun
391 , (obj:[(FUnit, _)]) <- args =
392 concat [object obj, method, "()"]
394 | "." `isPrefixOf` fun
395 , (obj:as) <- args =
396 concat [object obj, method, arguments as]
398 | "[]=" `isSuffixOf` fun
399 , (idx:val:[]) <- args =
400 concat [array, index idx, assign val]
402 | "[]" `isSuffixOf` fun
403 , (idx:[]) <- args =
404 array ++ index idx
406 | otherwise = fun ++ arguments args
407 where
408 name = filter (`notElem` "[]=") fun
409 method = name
410 field = name
411 array = name
412 object o = translateVariableName (snd o)
413 index i = "[" ++ translateVariableName (snd i) ++ "]"
414 assign v = '=' : generateWrapper v
415 arguments as =
416 '(' : intercalate "," (map generateWrapper as) ++ ")"
418 generateWrapper (ffunc, name)
419 | FFunction <- ffunc = idrRTNamespace ++ "ffiWrap(" ++ translateVariableName name ++ ")"
420 | FFunctionIO <- ffunc = idrRTNamespace ++ "ffiWrap(" ++ translateVariableName name ++ ")"
422 generateWrapper (_, name) =
423 translateVariableName name
425translateExpression (SChkCase var cases) =
426 "(function(e){\n"
427 ++ intercalate " else " (map (translateCase "e") cases)
428 ++ "\n})("
429 ++ translateVariableName var
430 ++ ")"
432translateExpression (SCase var cases) =
433 "(function(e){\n"
434 ++ intercalate " else " (map (translateCase "e") cases)
435 ++ "\n})("
436 ++ translateVariableName var
437 ++ ")"
439translateExpression (SCon i name vars) =
440 concat [ "new " ++ idrRTNamespace ++ "Con("
441 , show i
442 , ",["
443 , intercalate "," $ map translateVariableName vars
444 , "])"
445 ]
447translateExpression (SUpdate var e) =
448 translateVariableName var ++ " = " ++ translateExpression e
450translateExpression (SProj var i) =
451 translateVariableName var ++ ".vars[" ++ show i ++"]"
453translateExpression SNothing = "null"
455translateExpression e =
456 "(function(){throw 'Not yet implemented: "
457 ++ filter (/= '\'') (show e)
458 ++ "';})()"
460translateCase :: String -> SAlt -> String
461translateCase _ (SDefaultCase e) =
462 createIfBlock "true" (translateExpression e)
464translateCase var (SConstCase ty e)
465 | StrType <- ty = matchHelper "String"
466 | PtrType <- ty = matchHelper "Ptr"
467 | Forgot <- ty = matchHelper "Forgot"
468 | (AType ATFloat) <- ty = matchHelper "Float"
469 | (AType (ATInt ITBig)) <- ty = matchHelper "Integer"
470 | (AType (ATInt ITNative)) <- ty = matchHelper "Int"
471 | (AType (ATInt ITChar)) <- ty = matchHelper "Char"
472 where
473 matchHelper tyName = translateTypeMatch var tyName e
475translateCase var (SConstCase cst@(BI _) e) =
476 let cond = idrRTNamespace ++ "bigInt(" ++ var ++ ").equals(" ++ translateConstant cst ++ ")" in
477 createIfBlock cond (translateExpression e)
479translateCase var (SConstCase cst e) =
480 let cond = var ++ " == " ++ translateConstant cst in
481 createIfBlock cond (translateExpression e)
483translateCase var (SConCase a i name vars e) =
484 let isCon = var ++ " instanceof " ++ idrRTNamespace ++ "Con"
485 isI = show i ++ " == " ++ var ++ ".i"
486 params = intercalate "," $ map (("__var_" ++) . show) [a..(a+length vars)]
487 args = ".apply(this," ++ var ++ ".vars)"
488 f b =
489 "(function("
490 ++ params
491 ++ "){\nreturn " ++ b ++ "\n})" ++ args
492 cond = intercalate " && " [isCon, isI] in
493 createIfBlock cond $ f (translateExpression e)
495translateTypeMatch :: String -> String -> SExp -> String
496translateTypeMatch var ty exp =
497 let e = translateExpression exp in
498 createIfBlock (var
499 ++ " instanceof " ++ idrRTNamespace ++ "Type && "
500 ++ var ++ ".type == '"++ ty ++"'") e
503createIfBlock cond e =
504 "if (" ++ cond ++") {\n"
505 ++ "return " ++ e
506 ++ ";\n}"
508createTailcall call =
509 idrRTNamespace ++ "tailcall(function(){return " ++ call ++ "})"
511translateFunctionCall name vars =
512 concat (translateNamespace name)
513 ++ translateName name
514 ++ "("
515 ++ intercalate "," (map translateVariableName vars)
516 ++ ")"