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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/polykinds/T7438.stderr | |
| 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/polykinds/T7438.stderr')
| -rw-r--r-- | testsuite/tests/polykinds/T7438.stderr | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/testsuite/tests/polykinds/T7438.stderr b/testsuite/tests/polykinds/T7438.stderr index 46b7181840..d3ed001879 100644 --- a/testsuite/tests/polykinds/T7438.stderr +++ b/testsuite/tests/polykinds/T7438.stderr @@ -1,19 +1,19 @@ T7438.hs:6:14: error: - • Couldn't match expected type ‘r1’ with actual type ‘r’ - ‘r1’ is untouchable + • Couldn't match expected type ‘t3’ with actual type ‘t2’ + ‘t3’ is untouchable inside the constraints: t1 ~ t bound by a pattern with constructor: Nil :: forall k (a :: k). Thrist a a, in an equation for ‘go’ at T7438.hs:6:4-6 - ‘r1’ is a rigid type variable bound by - the inferred type of go :: Thrist t t1 -> r -> r1 at T7438.hs:6:1 - ‘r’ is a rigid type variable bound by - the inferred type of go :: Thrist t t1 -> r -> r1 at T7438.hs:6:1 + ‘t3’ is a rigid type variable bound by + the inferred type of go :: Thrist t t1 -> t2 -> t3 at T7438.hs:6:1 + ‘t2’ is a rigid type variable bound by + the inferred type of go :: Thrist t t1 -> t2 -> t3 at T7438.hs:6:1 Possible fix: add a type signature for ‘go’ • In the expression: acc In an equation for ‘go’: go Nil acc = acc • Relevant bindings include - acc :: r (bound at T7438.hs:6:8) - go :: Thrist t t1 -> r -> r1 (bound at T7438.hs:6:1) + acc :: t2 (bound at T7438.hs:6:8) + go :: Thrist t t1 -> t2 -> t3 (bound at T7438.hs:6:1) |