diff options
Diffstat (limited to 'testsuite')
-rw-r--r-- | testsuite/tests/typecheck/should_compile/T14434.hs | 17 | ||||
-rw-r--r-- | testsuite/tests/typecheck/should_compile/T14434.stdout | 2 | ||||
-rw-r--r-- | testsuite/tests/typecheck/should_compile/all.T | 1 |
3 files changed, 20 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/T14434.hs b/testsuite/tests/typecheck/should_compile/T14434.hs new file mode 100644 index 0000000000..a0d0442fed --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/T14434.hs @@ -0,0 +1,17 @@ +{-# LANGUAGE MonoLocalBinds, FlexibleInstances, OverloadedStrings #-} +{-# OPTIONS -fsolve-constant-dicts #-} + +module T14434 where + +class ToString a where + toString :: a -> String + +-- | This instance is used in original code as hack +-- to simplify code generation +instance {-# OVERLAPPABLE #-} ToString a where + toString _ = "Catchall attribute value" + +toStringX :: (ToString a) => a -> String +toStringX = toString + -- Here we do /not/ want to solve the ToString + -- constraint with the local instance diff --git a/testsuite/tests/typecheck/should_compile/T14434.stdout b/testsuite/tests/typecheck/should_compile/T14434.stdout new file mode 100644 index 0000000000..f1436e3959 --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/T14434.stdout @@ -0,0 +1,2 @@ +toStringX :: forall a. ToString a => a -> String +toStringX = toString diff --git a/testsuite/tests/typecheck/should_compile/all.T b/testsuite/tests/typecheck/should_compile/all.T index e799a45669..03e70915d4 100644 --- a/testsuite/tests/typecheck/should_compile/all.T +++ b/testsuite/tests/typecheck/should_compile/all.T @@ -581,3 +581,4 @@ test('T14333', normal, compile, ['']) test('T14363', normal, compile, ['']) test('T14363a', normal, compile, ['']) test('T7169', normal, compile, ['']) +test('T14434', [], run_command, ['$MAKE -s --no-print-directory T14434']) |