Re: [Haskell-cafe] WildCard question

Jon Fairbairn writes:

On 2004-04-13 at 18:52+0200 Ketil Malde wrote:

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Paul Cosby writes:

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Every time I try to use [underscore] in an definition it says something like the symbol /017 is not recognised

Could that be \017, i.e. octal 17 (defined in ASCII as SI, whatever that may be)?

SI is Shift In, if I remember correctly, not that the operation of devices like Flexowriters is of any relevance. However, I'd guess that it's hexadecimal 17, because ord '_' `rem` 16 == 15 == 0x17. So for some reason it's talking about the botom four bits of '_'!

ITYM octal - underscore is character 95 = 0x5F = 0137, so the bottom four bits are 0xF = 017. Perhaps you're typing Ctrl-_ instead of Shift-_? (long shot) --KW 8-)