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### Re^2: Searchin' through values

by vitoco (Friar)
 on Dec 14, 2009 at 13:08 UTC ( #812704=note: print w/replies, xml ) Need Help??

in reply to Re: Searchin' through values

I found very interesting this piece of code as an example for the \G pattern, but I noticed that x modifier was missing on each regexp AFAIK, but then tested if there was anything else I'm not awared.

Just as it is, it returns nothing on $pat. Then added the x modifier and got an endless loop! I thought it was related to a note in perlre: "It is worth noting that \G improperly used can result in an infinite loop.", but a small trace using print "($pat)\n"; just before each redo shows that \G is always at the beginning of the argument, not after what was already matched.

I tried again removing pos() to see if that function resets the pointer... No luck!

Am I doing something wrong?

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Re^3: Searchin' through values
by ikegami (Pope) on Dec 14, 2009 at 16:15 UTC
It's because 'x' wasn't the only missing modifier. 'g' (to make the engine pay attn to pos) and 'c' (to prevent the engine from resetting pos) were also missing. Fixed.

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