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Diffstat (limited to 'testsuite/tests/typecheck/should_compile/tc079.hs')
-rw-r--r-- | testsuite/tests/typecheck/should_compile/tc079.hs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/tc079.hs b/testsuite/tests/typecheck/should_compile/tc079.hs new file mode 100644 index 0000000000..db07ad1325 --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/tc079.hs @@ -0,0 +1,16 @@ +-- !!! small class decl with local polymorphism; +-- !!! "easy" to check default methods and such... +-- !!! (this is the example given in TcClassDcl) +-- +module ShouldSucceed where + +class Foo a where + op1 :: a -> Bool + op2 :: Ord b => a -> b -> b -> b + + op1 x = True + op2 x y z = if (op1 x) && (y < z) then y else z + +instance Foo Int where {} + +instance Foo a => Foo [a] where {} |