Re: Is Parsec's ParserError missing an Eq instance

Hi Manuel,

Is Parsec's ParserError missing an Eq instance What is the recommended way to use HUnit to test Parsec parsers?

In my project, I implemented Eq for ParseError locally. {-# OPTIONS_GHC -fno-warn-orphans #-} import Text.ParserCombinators.Parsec.Error(ParseError, Message, errorMessages, messageEq) instance Eq ParseError where a == b = errorMessages a == errorMessages b instance Eq Message where (==) = messageEq I don't know if it was intentionally left out or not. You might get more responses on Haskell-Cafe. -Greg