To meet Ian's observation below, I propose to replace the lexical production newline -> a newline (system dependent) by newline -> return linefeed | return | linefeed which, given maximal munch, will behave decently on any normal system. Any objections? Simon | -----Original Message----- | From: Ian Lynagh [mailto:igloo@earth.li] | The report says | | whitechar -> newline | return | linefeed | vertab | formfeed | | space | tab | uniWhite | newline -> a newline (system dependent) | return -> a carriage return | linefeed -> a line feed | | so, if your system defines a newline to be a line feed, an | implementation is free to choose whether to lex a line feed | as a whitechar or a newline, which makes quite a difference | when you consider the layout rule! | | newline can't be arbitrarily determined by the system - | certainly "x" or "let" would not be acceptable - and having | it system dependent means that Haskell scripts are not | portable between different systems. I haven't looked but I | would be surprised if current implementations behaved | differently on different platforms - I assume they all look | for something matching (<CR><LF>?)|<LF> everywhere.