This saves a lot of unnecessary exploring of size change graphs, which
can get over the top quite quickly if there's complex mutual
definitions, or even just a single function with an interesting variety
of recursive calls.
Fixes#1365Fixes#1277Fixes#645
We do this during desugaring because elaboration may insert valid
`?` values on the LHS (e.g. when elaborating things that cannot be
pattern-matched on and should be checked to be forced).
Where 'small' means they don't refer to other metavariables, except
right at the top level, and they don't go beyond a certain small depth,
arrived at by experimenting.
We already did a bit of this, but only for depth 0. The effect of this
is that we don't need to save out lots of metavariables, so ttc loading
is faster. This takes about 8s off the Idris build time!
It has always bothered me that 'False' got mapped to tag 1 and 'True'
got mapped to tag 0. This doesn't change much in practice (except that
perhaps a code generator might notice some useful things in intToBool)
but I'm changing it now anyway. Also added a couple of inlinings of
boolean operations.
This saves a small amount of allocation, especially since we never
actually look at the tag in a record. We can use null? for Nothing just
like for Nil.
This adds new `Int8`, `Int16`, `Int32` and `Int64` data types
to the compiler, thus working towards properly specified integer
types as discussed in #1048.
In addition, the following changes / corrections are made:
* Support casts from `Char`, `String`, and `Double` to all integer
types (and back). This fixes#1270.
* Make sure that all casts to limited-precision integers are properly
bounds checked (this was not the case so far for casts from `String`
and `Double` to `Int`)
* Add a thorough set of tests to make sure all bounds checks work
correctly for all supported casts and arithmetic operations
We've had these for a while, used for interface specialisation, but
they're not yet used anywhere else or properly documented. We should
document them soon, but for now, it's a useful performance boost to
always use the fast versions of pack/unpack/concat at runtime.
Also moves a couple to the prelude, to ensure that the fast versions are
defined in the same place as the 'normal' version so that the
transformation will always fire (that is, no need to import Data.String
for the transformation to work).
Previously, parameter block reused the same syntax as in Idris1:
```
parameters (v1 : t1, … , vn : tn)
```
Unfortunately this syntax presents some issues:
- It does not allow to declare implicit parameters
- It does not allow to specify which multiplicity to use
- It is inconsistent with the syntax used for named arguments elsewhere
in the language.
This change fixes those three problems by borrowing the syntax for
declaring type parameters in records:
```
parameters (v1 : t2) (v2 : t2) … (vn : tn)
```
It also enables other features like multiple declarations of arguments
with the same type:
```
parameters (v1, v2 : Type)
```
If we were to turn the whole check off instead of just making it
(not incase || isJust (isLHS mode)) then Issue962-case would fail
because `c` would get defaulted to `Integer` and not the `Int` that
is expected.
Rather than tracking how far we are from the project root in the various
Makefile commands, it's much easier to reference the build target with
with an absolute path.
On Unix-like operating systems stdio.h is usually line-buffered. As
putStr uses fputs(3) from stdio.h internally, output will be written to
standard out after a newline character is written to the buffer. Since
the prompt does not contain a newline, it will only be written to
standard output after the user presses return. I encountered this issue
on Alpine Linux which uses musl libc (instead of glibc). However, I
believe this issue is likely also reproducible with glibc. This commit
fixes this issue by flushing standard output after writing the prompt to
it. Surprisingly, `src/Idris/IDEMode/REPL.idr` already does this
correctly, `src/Idris/REPL.idr` does not though.
Given we keep getting tripped up by this, here we go:
* Namespaces
* Data names
* Record names
* Data constructor names (except for operators)
* Record constructor names (except for operators)
* Interface constructor names (except for operators)
`.proj` and `proj` are identically defined but separate functions.
This patch fixes it by defining `.proj` only once, and adding `proj = (.proj)`
for every projection.
This avoids resugaring to the wrong type when there are user defined
symbols which conflicts with builtins such as Pair.
Changed the test linear002 which was relying on this behaviour for a
user defined Unit.
Fixes#634.
We've always just used 0, which isn't correct if the function is going
to be used in a runtime pattern match. Now calculate correctly so that
we're explicit about which type level variables are used at runtime.
This might cause some programs to fail to compile, if they use functions
that calculate Pi types. The solution is to make those functions
explicitly 0 multiplicity. If that doesn't work, you may have been
accidentally trying to use compile-time only data at run time!
Fixes#1163
Now reporting an error if we can't find a package that satisfies the
constraints. The version number field can still be a string (as it used
to be) but will give a deprecation warning - and the old style version
string wasn't used anyway.
Version constraints can have an upper and/or lower bound, which can be
inclusive or not.
Add wrap on file end
use rust-style raw string syntax
use swift style syntax raw string
Update src/Parser/Support.idr
Co-authored-by: André Videla <andre.videla@gmail.com>
Escape line wrap
Resolve conflict
It's disappointing to have to do this, but I think necessary because
various issue reports have shown it to be unsound (at least as far as
inference goes) and, at the very least, confusing. This patch brings us
back to the basic rules of QTT.
On the one hand, this makes the 1 multiplicity less useful, because it
means we can't flag arguments as being used exactly once which would be
useful for optimisation purposes as well as precision in the type. On
the other hand, it removes some complexity (and a hack) from
unification, and has the advantage of being correct! Also, I still
consider the 1 multiplicity an experiment.
We can still do interesting things like protocol state tracking, which
is my primary motivation at least.
Ideally, if the 1 multiplicity is going to be more generall useful,
we'll need some kind of way of doing multiplicity polymorphism in the
future. I don't think subtyping is the way (I've pretty much always come
to regret adding some form of subtyping).
Fixes#73 (and maybe some others).
Local hints need to reduce (just like global hints do) so we expand
their definition to the lifted name before applying them.
We're identifying the global hints by knowing that the binder name is a
nested function name. This is a bit of hack, and it'd probably be better
to record that information in the binder instead, but that's a more
substantial change than I want to do right now.
This gives us the ability to define and use implementations locally, in
where clauses/local let bindings, as well as flag local definitions as
hints.
It's not yet quite equivalent to global hints, however, since it translated
the hint to a local let binding, which doesn't reduce, so if something
relies on the reduction behaviour of the hint, it won't work. This
refinement is coming later
+ Expanded the documentation on how to use literate modes.
+ Added invisible code blocks in Markdown using specially tagged comment blocks: `<!-- idris -->`.
+ Fixed OrgMode specificaton to recognise comment blocks properly.
This allows, for exmaple, to have apostrophes in module names.
Test was added only for chez, however this should be viable for all
targets with `:exec` implemented.
Things like (,) () aren't straightforward IVar's but are IAlternative's
which present options about how the term should resolve. [| |] was not
accounting for this.
broaden what Names can be reflected and refied
I did not add the Names I wasn't sure how to test but have put placeholders
that produce clearer error messages.
Auxiliary functions introduced in elaboration (e.g., through case splits and with clauses) now
have the same totality annotation as the function they're defined in.
Moved auxiliary function `findSetTotal` into `Context.idr` since it's
now used by `ProcessDef.idr` too.
Added a totality requirement argument to `checkClause` so that the
with-clause case could propagate it to the functions it generates in
elaboration.
Sandwhich the rhs elaboration in pattern matches with code that sets
the global, default, totality requirement to the current one, and
restores the previous default afterwards. It's a bit of a hacky way to
do it, but I don't think we have a better alternative with the current
design.
Until now namespaces were stored as (reversed) lists of strings.
It led to:
* confusing code where we work on the underlying representation of
namespaces rather than say what we mean (using `isSuffixOf` to mean
`isParentOf`)
* potentially introducing errors by not respecting the invariant cf.
bug report #616 (but also name generation in the scheme backend
although that did not lead to bugs as it was self-consistent AFAICT)
* ad-hoc code to circumvent overlapping interface implementation when
showing / pretty-printing namespaces
This PR introduces a `Namespace` newtype containing a list of strings.
Nested namespaces are still stored in reverse order but the exposed
interface aims to support programming by saying what we mean
(`isParentOf`, `isApproximationOf`, `X <.> Y` computes to `X.Y`, etc.)
irrespective of the underlying representation.
Until now namespaces were stored as (reversed) lists of strings.
It led to:
* confusing code where we work on the representation rather than say
what we mean (e.g. using `isSuffixOf` to mean `isParentOf`)
* potentially introducing errors by not respecting the invariant cf.
bug report #616 (but also name generation in the scheme backend
although that did not lead to bugs as it was self-consistent AFAICT)
* ad-hoc code to circumvent overlapping interface implementations when
showing / pretty-printing namespaces
This introduces a Namespace newtype containing non-empty lists of
strings. Nested namespaces are still stored in reverse order but the
exposed interface aims to support programming by saying what we mean
(`isParentOf`, `isApproximationOf`, `X <.> Y` computes to `X.Y`, etc.)
irrespective of the underlying representation.
All of these internal names are making the output fragile. This
cleanup should allow us to only have to update the golden file
when there is a genuinely interesting change.
- Added initial implementations for terms and values
- Error messages converted to pretty printer
- Colorization for error messages
- Color and console width option both as command line and repl command
As it was, it could break if the argument was repeated more than twice.
When checking dot patterns, we need to check that no further holes are
solved, and that the pattern variable doesn't unify with some other
pattern variable, but if it had already made progress (either for a good
or bad reason) we missed this. Fixes#536
As it was, there was significant backtracking for big expressions,
getting to the end, not finding a **, so having to try again for
application expressions. Fixes#532
This has involved quite a bit of reorganisation and some improvements in
resugaring so that the results look nice. In summary:
* Expression search now gives back a RawImp rather than a checked term,
which allows it to include case expressions
* Case with one pattern is resugared to a destructuring let
* Some name generation issues address in function generation
We look at intermediate results for local variables which are functions
that return a concrete type, or recursive calls that return a single
constructor type. In these cases, we:
* let bind the local variable/recursive call
* generate a new definition for the scope, as a 'case' function
When we recursively generate the definition, it's a bit more restricted
so as not to explode the search space. We only take the first result, we
only look one constructor deep, and we go right to left on variable
splitting so only deconstruct the name we've just added.
Sort by proportion of bound variables used, which is likely to get us
the right answer quicker. The results are generated in batches of 16 (a
completely arbitrary choice) then sorted.
This gives the number of implementations to reject before accepting one.
It's intended as a reasonably cheap way of giving multiple results from
interactive editing (e.g. the vim mode, which goes via the REPL and
--client rather than the IDE mode)
These continue the search from :ps and :gd next respectively, giving the
next search result until there are no more results.
Correspondingly, added ':proof-search-next' and ':generate-def-next' in
IDE mode, which continue the search from the previous ':proof-search'
and ':generate-def' respectively.
Rather than returning a complete list of results, return a pair of the
first result, and a continuation. The continuation explains how to
continue the search if the given result is deemed unacceptable (either
on encountering an error somewhere, or just if the caller wants the next
result).
This means we don't search needlessly if we're only looking for the
first result. Fixes#228
...until the definition is complete. This is necessary since sometimes
information outside the case block can help resolve interfaces, and in
the simplest case, we might just have delayed resolving a default
Integer. It turns out this was also an obscure bug waiting to happen
with coverage checking of nested case blocks (so there's a test update
there too).
Fixes#443
In a 'Bind', normalise the result of the first action, rather than
quoting the HNF. This improves performance since the HNF could be quite
big when quoted back.
Ideally, we wouldn't have to quote and unquote here, and we can probably
achieve this by tinkering with the evaluator.
This has an unfortunate effect on the reflection002 test, in that the
"typed template Idris" example now evaluates too much. But, I think the
overall performance is too important for the primary motivation
behind elaborator reflection. I will return to this!
This is partly to tidy things up, but also a good test for 'import as'.
Requires some internal changes since there are parts of reflection,
unelaboration and a compiler hack that rely on where things are in the
Prelude.
