diff options
Diffstat (limited to 'testsuite/tests/codeGen/should_compile/T3286b.hs')
| -rw-r--r-- | testsuite/tests/codeGen/should_compile/T3286b.hs | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/codeGen/should_compile/T3286b.hs b/testsuite/tests/codeGen/should_compile/T3286b.hs new file mode 100644 index 0000000000..f6c1fdbeac --- /dev/null +++ b/testsuite/tests/codeGen/should_compile/T3286b.hs @@ -0,0 +1,15 @@ + +{-# LANGUAGE GeneralizedNewtypeDeriving #-} + +module T3286b (LogFloat) where + +newtype LogFloat = LogFloat Double + deriving (Eq, Ord, Num, Show) + +instance Fractional LogFloat where + (/) (LogFloat x) (LogFloat y) + | x == 1 + && y == 1 = error "(/)" + | otherwise = LogFloat (x-y) + fromRational = LogFloat . fromRational + |