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| author | Richard Eisenberg <eir@cis.upenn.edu> | 2016-01-13 23:29:17 -0500 |
|---|---|---|
| committer | Richard Eisenberg <eir@cis.upenn.edu> | 2016-01-27 09:33:26 -0500 |
| commit | 00cbbab3362578df44851442408a8b91a2a769fa (patch) | |
| tree | c8f79d003510e191adeab0d1b98f20ebde40d914 /testsuite/tests/annotations | |
| parent | 2899aa580d633103fc551e36c977720b94f5b41c (diff) | |
| download | haskell-00cbbab3362578df44851442408a8b91a2a769fa.tar.gz | |
Refactor the typechecker to use ExpTypes.
The idea here is described in [wiki:Typechecker]. Briefly,
this refactor keeps solid track of "synthesis" mode vs
"checking" in GHC's bidirectional type-checking algorithm.
When in synthesis mode, the expected type is just an IORef
to write to.
In addition, this patch does a significant reworking of
RebindableSyntax, allowing much more freedom in the types
of the rebindable operators. For example, we can now have
`negate :: Int -> Bool` and
`(>>=) :: m a -> (forall x. a x -> m b) -> m b`. The magic
is in tcSyntaxOp.
This addresses tickets #11397, #11452, and #11458.
Tests:
typecheck/should_compile/{RebindHR,RebindNegate,T11397,T11458}
th/T11452
Diffstat (limited to 'testsuite/tests/annotations')
| -rw-r--r-- | testsuite/tests/annotations/should_fail/annfail10.stderr | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/testsuite/tests/annotations/should_fail/annfail10.stderr b/testsuite/tests/annotations/should_fail/annfail10.stderr index 251f0c317c..3d55d4aed4 100644 --- a/testsuite/tests/annotations/should_fail/annfail10.stderr +++ b/testsuite/tests/annotations/should_fail/annfail10.stderr @@ -1,8 +1,8 @@ annfail10.hs:9:1: error: - • Ambiguous type variable ‘a0’ arising from an annotation - prevents the constraint ‘(Data.Data.Data a0)’ from being solved. - Probable fix: use a type annotation to specify what ‘a0’ should be. + • Ambiguous type variable ‘t0’ arising from an annotation + prevents the constraint ‘(Data.Data.Data t0)’ from being solved. + Probable fix: use a type annotation to specify what ‘t0’ should be. These potential instances exist: instance (Data.Data.Data a, Data.Data.Data b) => Data.Data.Data (Either a b) @@ -15,9 +15,9 @@ annfail10.hs:9:1: error: • In the annotation: {-# ANN f 1 #-} annfail10.hs:9:11: error: - • Ambiguous type variable ‘a0’ arising from the literal ‘1’ - prevents the constraint ‘(Num a0)’ from being solved. - Probable fix: use a type annotation to specify what ‘a0’ should be. + • Ambiguous type variable ‘t0’ arising from the literal ‘1’ + prevents the constraint ‘(Num t0)’ from being solved. + Probable fix: use a type annotation to specify what ‘t0’ should be. These potential instances exist: instance Num Integer -- Defined in ‘GHC.Num’ instance Num Double -- Defined in ‘GHC.Float’ |