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Diffstat (limited to 'testsuite/tests/typecheck/should_run/tcrun023.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_run/tcrun023.hs | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_run/tcrun023.hs b/testsuite/tests/typecheck/should_run/tcrun023.hs new file mode 100644 index 0000000000..3a6166b015 --- /dev/null +++ b/testsuite/tests/typecheck/should_run/tcrun023.hs @@ -0,0 +1,13 @@ +{-# LANGUAGE ImplicitParams #-} + +-- Implicit parameters should not give rise to ambiguity. + +module Main (main) where + +foo :: (?x :: [a]) => Int -> String +foo n = show (n + length ?x) + + +main = do { putStrLn (let ?x = [True,False] in foo 3) ; + putStrLn (let ?x = "fred" in foo 4) } + |