id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
3453,"Add ""check"" function to Control.Monad",JonFairbairn,,"Generalisation of ""guard"".

check (not . isSpace) 'c' == Just 'c'

check (not . isSpace) ' ' == Nothing

See example in attached darcs patch",proposal,closed,normal,Not GHC,libraries/base,6.10.4,wontfix,,,Unknown/Multiple,Unknown/Multiple,,Unknown,,,,