From ba13ff08d2dd38de9abdb8b59125b73471404d44 Mon Sep 17 00:00:00 2001 From: bringert Date: Thu, 30 Nov 2006 22:50:25 +0000 Subject: Added the beginnings of GFCC to JavaScript conversion. --- src/GF/JavaScript/ErrM.hs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 src/GF/JavaScript/ErrM.hs (limited to 'src/GF/JavaScript/ErrM.hs') diff --git a/src/GF/JavaScript/ErrM.hs b/src/GF/JavaScript/ErrM.hs new file mode 100644 index 000000000..71d3519a2 --- /dev/null +++ b/src/GF/JavaScript/ErrM.hs @@ -0,0 +1,16 @@ +-- 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.JavaScript.ErrM where + +-- the Error monad: 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 -- cgit v1.2.3