diff options
Diffstat (limited to 'testsuite/tests/typecheck/should_compile/tc068.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/tc068.hs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/tc068.hs b/testsuite/tests/typecheck/should_compile/tc068.hs new file mode 100644 index 0000000000..f455d41b6e --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/tc068.hs @@ -0,0 +1,18 @@ +module ShouldSucceed where + +data T a = D (B a) | C +data B b = X | Y b + +instance (Eq a) => Eq (T a) where + (D x) == (D y) = x == y + C == C = True + a == b = False + + a /= b = not (a == b) + +instance (Eq b) => Eq (B b) where + X == X = True + (Y a) == (Y b) = a == b + a == b = False + + a /= b = not (a == b) |