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| author | aarne <aarne@cs.chalmers.se> | 2008-06-25 16:54:35 +0000 |
|---|---|---|
| committer | aarne <aarne@cs.chalmers.se> | 2008-06-25 16:54:35 +0000 |
| commit | e9e80fc389365e24d4300d7d5390c7d833a96c50 (patch) | |
| tree | f0b58473adaa670bd8fc52ada419d8cad470ee03 /src-3.0/GF/Source/ErrM.hs | |
| parent | b96b36f43de3e2f8b58d5f539daa6f6d47f25870 (diff) | |
changed names of resource-1.3; added a note on homepage on release
Diffstat (limited to 'src-3.0/GF/Source/ErrM.hs')
| -rw-r--r-- | src-3.0/GF/Source/ErrM.hs | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/src-3.0/GF/Source/ErrM.hs b/src-3.0/GF/Source/ErrM.hs deleted file mode 100644 index addd22f69..000000000 --- a/src-3.0/GF/Source/ErrM.hs +++ /dev/null @@ -1,26 +0,0 @@ --- BNF Converter: Error Monad
--- Copyright (C) 2004 Author: Aarne Ranta
-
--- This file comes with NO WARRANTY and may be used FOR ANY PURPOSE.
-module GF.Source.ErrM where
-
--- the Error monad: like Maybe type with error msgs
-
-import Control.Monad (MonadPlus(..), liftM)
-
-data Err a = Ok a | Bad String
- deriving (Read, Show, Eq, Ord)
-
-instance Monad Err where
- return = Ok
- fail = Bad
- Ok a >>= f = f a
- Bad s >>= f = Bad s
-
-instance Functor Err where
- fmap = liftM
-
-instance MonadPlus Err where
- mzero = Bad "Err.mzero"
- mplus (Bad _) y = y
- mplus x _ = x
|