"Harris, Andrew" wrote:

Hi -

This isn't a pure "Haskell" question, but I'm trying to use the Parsec library to parse out space separated numbers, which could be integers or floats and either positive or negative. I was using the "naturalOrFloat" lexeme parser from the ParsecToken module, until I realized that it doesn't seem to handle negative integers. I've been poking with trying to pair the integer and float lexeme parsers with try() blocks, but I ain't no parsing expert and am not making good progress.

Hi Andrew, I don't know much about Parsec, but "natural" means positive integers only. Isn't there an "integerOrFloat" ? As for the program in your other mail, "float" and "integer" contain both positive and negative numbers, so you shouldn't have to check for the minus sign. Jan