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Diffstat (limited to 'testsuite/tests/typecheck/should_compile/tc164.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/tc164.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/tc164.hs b/testsuite/tests/typecheck/should_compile/tc164.hs new file mode 100644 index 0000000000..ed6fa429aa --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/tc164.hs @@ -0,0 +1,12 @@ +{-# LANGUAGE ImplicitParams #-} + +module ShouldCompile where + +data UniqueSupply = US Integer + +newUnique :: (?uniqueSupply :: UniqueSupply) => Integer +newUnique = r + where US r = ?uniqueSupply + -- The lazy pattern match in the where clause killed GHC 5.04 + -- because the type {?uniqueSupply::UniqueSupply} of the RHS + -- of the 'where' didn't look like a UniqueSupply |