diff options
| author | Ryan Scott <ryan.gl.scott@gmail.com> | 2017-05-06 12:37:00 -0400 |
|---|---|---|
| committer | Ryan Scott <ryan.gl.scott@gmail.com> | 2017-05-06 12:37:04 -0400 |
| commit | ed0c7f8b1f91651203db4a0ee5931d47e1e6ab51 (patch) | |
| tree | 8d9f83f21605273925ccdaede5edcec9cb362229 /testsuite/tests | |
| parent | 4a6cb5efe8e55717dfbbb677aa95e3b825d8de05 (diff) | |
| download | haskell-ed0c7f8b1f91651203db4a0ee5931d47e1e6ab51.tar.gz | |
Add regression test for #13651
Commit eb55ec2941239dee05afc6be818b129efe51660e ended up fixing #13651, so
let's add a regression test for it.
Diffstat (limited to 'testsuite/tests')
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/T13651.hs | 14 | ||||
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/all.T | 1 |
2 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/T13651.hs b/testsuite/tests/typecheck/should_compile/T13651.hs new file mode 100644 index 0000000000..43ae633534 --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/T13651.hs @@ -0,0 +1,14 @@ +{-# LANGUAGE TypeFamilies, TypeFamilyDependencies #-} +module T13651 where + +type family F r s = f | f -> r s + +type instance F (Bar h (Foo r)) (Bar h (Foo s)) = Bar h (Bar r s) + +data Bar s b +data Foo a + +foo :: (F cr cu ~ Bar h (Bar r u), + F cu cs ~ Bar (Foo h) (Bar u s)) + => Bar h (Bar r u) -> Bar (Foo h) (Bar u s) -> Foo (cr -> cs) +foo = undefined diff --git a/testsuite/tests/typecheck/should_compile/all.T b/testsuite/tests/typecheck/should_compile/all.T index 34b8184069..6db86a8627 100644 --- a/testsuite/tests/typecheck/should_compile/all.T +++ b/testsuite/tests/typecheck/should_compile/all.T @@ -558,3 +558,4 @@ test('T13526', normal, compile, ['']) test('T13603', normal, compile, ['']) test('T13333', normal, compile, ['']) test('T13585', [extra_files(['T13585.hs', 'T13585a.hs', 'T13585b.hs'])], run_command, ['$MAKE -s --no-print-directory T13585']) +test('T13651', normal, compile, ['']) |