diff options
Diffstat (limited to 'testsuite/tests/arrows/should_compile/arrowapply4.hs')
| -rw-r--r-- | testsuite/tests/arrows/should_compile/arrowapply4.hs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/testsuite/tests/arrows/should_compile/arrowapply4.hs b/testsuite/tests/arrows/should_compile/arrowapply4.hs new file mode 100644 index 0000000000..af0dac4cee --- /dev/null +++ b/testsuite/tests/arrows/should_compile/arrowapply4.hs @@ -0,0 +1,17 @@ +{-# LANGUAGE Arrows #-} + +module ShouldCompile where + +-- example from Sebastian Boldt <Sebastian.Boldt@arcor.de>: +-- (f -< a) b === f -< (a,b) + +import Control.Arrow + +mshowA :: (Arrow a, Show b) => a (b, String) String +mshowA = proc (x,s) -> returnA -< s ++ show x ++ s + +f :: Arrow a => a Int String +f = proc x -> (mshowA -< x) "***" + +g :: ArrowApply a => a Int String +g = proc x -> (mshowA -<< x) "***" |