Re: Re: negative lookaheads doing my 'ead in

right
I just re-read my original question and of course what I meant was why does it match?

When I run the above pattern it does match

Comment on Re: Re: negative lookaheads doing my 'ead in

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Re: Re: Re: negative lookaheads doing my 'ead in by BrowserUk (Patriarch) on Nov 08, 2002 at 11:42 UTC
The reason it matches is because the immediate preceeding whitespace is optional \s. Therefore the parser can choose to say that if there is no whitespace, then the next char after the second (\w+) is a space, which isn't '<=' so therefore is can match, so it does. Change that to be `if (/^\s(?!for all)(\w+)\s:\s(\w+)\s+(?!<=)/i) {` and it no longer can match, so it doesn't (if you get my drift. I realise that may or may not help you. ++Jasper below. I couldn't find a way of doing that. The caveat is that if you wanted to match `'cidr_enable: en_core_id == NOT(dsp_reset_n) AND <= stuff;'` your out of luck. Nah! You're thinking of Simon Templar, originally played (on UKTV) by Roger Moore and later by Ian Ogilvy	[reply] [d/l] [select]

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Re: Re: Re: negative lookaheads doing my 'ead in
by BrowserUk (Patriarch) on Nov 08, 2002 at 11:42 UTC

The reason it matches is because the immediate preceeding whitespace is optional \s*. Therefore the parser can choose to say that if there is no whitespace, then the next char after the second (\w+) is a space, which isn't '<=' so therefore is can match, so it does.

Change that to be if (/^\s*(?!for all)(\w+)\s*:\s*(\w+)\s+(?!<=)/i) { and it no longer can match, so it doesn't (if you get my drift.

I realise that may or may not help you.

++Jasper below. I couldn't find a way of doing that. The caveat is that if you wanted to match

'cidr_enable: en_core_id == NOT(dsp_reset_n) AND <= stuff;'

your out of luck.

Nah! You're thinking of Simon Templar, originally played (on UKTV) by Roger Moore and later by Ian Ogilvy

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