Hello, You can also just use reads which returns a list of (partial) parses. -Jeff haskell-cafe-bounces@haskell.org wrote on 12/19/2007 03:17:39 PM:
Hi
Well, how do I compile a Haskell program in such a way, that I get a useful error message from read? I mean, like the filename/linenumber of the calling expression for starters.
I use the Safe library to do this sort of stuff:
http://www-users.cs.york.ac.uk/~ndm/safe/
You can call readMay to get a maybe result, or readNote which gives an augmented error message on a crash. You can of course combine this with the CPP trick:
#define read readNote (__FILE__++":"++show __LINE__)
Thanks
Neil _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
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