diff options
| author | aarne <aarne@cs.chalmers.se> | 2008-06-25 16:43:48 +0000 |
|---|---|---|
| committer | aarne <aarne@cs.chalmers.se> | 2008-06-25 16:43:48 +0000 |
| commit | b96b36f43de3e2f8b58d5f539daa6f6d47f25870 (patch) | |
| tree | 0992334be13cec6538a1dea22fbbf26ad6bdf224 /src/GF/Data/ErrM.hs | |
| parent | fe367412e0aeb4ad5c02de68e6eca382e0f96984 (diff) | |
removed src for 2.9
Diffstat (limited to 'src/GF/Data/ErrM.hs')
| -rw-r--r-- | src/GF/Data/ErrM.hs | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/src/GF/Data/ErrM.hs b/src/GF/Data/ErrM.hs deleted file mode 100644 index e8cea12d4..000000000 --- a/src/GF/Data/ErrM.hs +++ /dev/null @@ -1,38 +0,0 @@ ----------------------------------------------------------------------- --- | --- Module : ErrM --- Maintainer : AR --- Stability : (stable) --- Portability : (portable) --- --- > CVS $Date: 2005/04/21 16:22:00 $ --- > CVS $Author: bringert $ --- > CVS $Revision: 1.5 $ --- --- hack for BNFC generated files. AR 21/9/2003 ------------------------------------------------------------------------------ - -module GF.Data.ErrM (Err(..)) where - -import Control.Monad (MonadPlus(..)) - --- | like @Maybe@ type with error msgs -data Err a = Ok a | Bad String - deriving (Read, Show, Eq) - -instance Monad Err where - return = Ok - fail = Bad - Ok a >>= f = f a - Bad s >>= f = Bad s - --- | added 2\/10\/2003 by PEB -instance Functor Err where - fmap f (Ok a) = Ok (f a) - fmap f (Bad s) = Bad s - --- | added by KJ -instance MonadPlus Err where - mzero = Bad "error (no reason given)" - mplus (Ok a) _ = Ok a - mplus (Bad s) b = b |