From b96b36f43de3e2f8b58d5f539daa6f6d47f25870 Mon Sep 17 00:00:00 2001 From: aarne Date: Wed, 25 Jun 2008 16:43:48 +0000 Subject: removed src for 2.9 --- src/GF/Source/ErrM.hs | 26 -------------------------- 1 file changed, 26 deletions(-) delete mode 100644 src/GF/Source/ErrM.hs (limited to 'src/GF/Source/ErrM.hs') diff --git a/src/GF/Source/ErrM.hs b/src/GF/Source/ErrM.hs deleted file mode 100644 index 63840758e..000000000 --- a/src/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 -- cgit v1.2.3