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| author | Simon Peyton Jones <simonpj@microsoft.com> | 2018-10-03 16:35:09 +0100 |
|---|---|---|
| committer | Simon Peyton Jones <simonpj@microsoft.com> | 2018-10-04 15:37:58 +0100 |
| commit | 2f09753f96207c12efd43090f5de55b05aef35d3 (patch) | |
| tree | 4093c0be62785abc174e1ff2e1ea781cc07789b4 /testsuite/tests/polykinds | |
| parent | 37ef7031b95c97e7c8bc1d14bc95554a3bac2873 (diff) | |
| download | haskell-2f09753f96207c12efd43090f5de55b05aef35d3.tar.gz | |
Distinguish Inferred from Specified tyvars
In a declared type we need to distinguish between Inferred
and Specified type variables. This was exposed by Trac #15592.
See Note [Work out final tyConBinders] in TcTyClsDecls.
I had to change the definition of HasField in GHC.Records to
class HasField x r a | x r -> a where
so as to have an /inferred/ kind argument rather than a
specfied one. So
HasField :: forall {k}. k -> * -> * -> Constraint
Diffstat (limited to 'testsuite/tests/polykinds')
| -rw-r--r-- | testsuite/tests/polykinds/T15592.hs | 5 | ||||
| -rw-r--r-- | testsuite/tests/polykinds/T15592.stderr | 11 | ||||
| -rw-r--r-- | testsuite/tests/polykinds/all.T | 1 |
3 files changed, 17 insertions, 0 deletions
diff --git a/testsuite/tests/polykinds/T15592.hs b/testsuite/tests/polykinds/T15592.hs new file mode 100644 index 0000000000..7e81c42565 --- /dev/null +++ b/testsuite/tests/polykinds/T15592.hs @@ -0,0 +1,5 @@ +{-# LANGUAGE TypeInType #-} +{-# OPTIONS_GHC -ddump-types -fprint-explicit-foralls #-} +module T15592 where + +data T f (a::k1) b = MkT (f a b) (T f a b) diff --git a/testsuite/tests/polykinds/T15592.stderr b/testsuite/tests/polykinds/T15592.stderr new file mode 100644 index 0000000000..71dc3b20b3 --- /dev/null +++ b/testsuite/tests/polykinds/T15592.stderr @@ -0,0 +1,11 @@ +TYPE SIGNATURES + T15592.MkT :: + forall {k} k1 (f :: k1 -> k -> *) (a :: k1) (b :: k). + f a b -> T f a b -> T f a b +TYPE CONSTRUCTORS + type role T nominal nominal representational nominal nominal + T :: forall {k} k1. (k1 -> k -> *) -> k1 -> k -> * +COERCION AXIOMS +Dependent modules: [] +Dependent packages: [base-4.12.0.0, ghc-prim-0.5.3, + integer-gmp-1.0.2.0] diff --git a/testsuite/tests/polykinds/all.T b/testsuite/tests/polykinds/all.T index ae4ee51a21..010d0ac703 100644 --- a/testsuite/tests/polykinds/all.T +++ b/testsuite/tests/polykinds/all.T @@ -193,3 +193,4 @@ test('T15116a', normal, compile_fail, ['']) test('T15170', normal, compile, ['']) test('T14939', normal, compile, ['-O']) test('T15577', normal, compile_fail, ['-O']) +test('T15592', normal, compile, ['']) |