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| author | Simon Peyton Jones <simon.peytonjones@gmail.com> | 2023-05-05 13:18:28 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2023-05-11 04:11:30 -0400 |
| commit | 40c7daed0c971e58e86a8189f82f72e9213af8b6 (patch) | |
| tree | 86626dbe410954fb6ead7ed1bde80a612d4d287e /testsuite | |
| parent | 29be39ba3f187279b19cf451f2d8f58822edab4f (diff) | |
| download | haskell-40c7daed0c971e58e86a8189f82f72e9213af8b6.tar.gz | |
Look both ways when looking for quantified equalities
When looking up (t1 ~# t2) in the quantified constraints,
check both orientations. Forgetting this led to #23333.
Diffstat (limited to 'testsuite')
| -rw-r--r-- | testsuite/tests/quantified-constraints/T23333.hs | 8 | ||||
| -rw-r--r-- | testsuite/tests/quantified-constraints/all.T | 2 |
2 files changed, 9 insertions, 1 deletions
diff --git a/testsuite/tests/quantified-constraints/T23333.hs b/testsuite/tests/quantified-constraints/T23333.hs new file mode 100644 index 0000000000..c8fde6d608 --- /dev/null +++ b/testsuite/tests/quantified-constraints/T23333.hs @@ -0,0 +1,8 @@ +{-# LANGUAGE QuantifiedConstraints #-} +module T23333 where + +foo1 :: (forall y. Bool ~ y) => z -> Bool +foo1 x = not x + +foo2 :: (forall y. y ~ Bool) => z -> Bool +foo2 x = not x diff --git a/testsuite/tests/quantified-constraints/all.T b/testsuite/tests/quantified-constraints/all.T index d3bfe6e07e..bea86c5e8f 100644 --- a/testsuite/tests/quantified-constraints/all.T +++ b/testsuite/tests/quantified-constraints/all.T @@ -41,4 +41,4 @@ test('T22216d', normal, compile, ['']) test('T22216e', normal, compile, ['']) test('T22223', normal, compile, ['']) test('T19690', normal, compile_fail, ['']) - +test('T23333', normal, compile, ['']) |