Re^3: A regex that only matches at offset that are multiples of a given N?

in reply to Re^2: A regex that only matches at offset that are multiples of a given N?
in thread A regex that only matches at offset that are multiples of a given N?

Your second regex works,

I'm not seeing that:

use strict;
use warnings;
use 5.010;

#      0    5   10   15   20   25   30   35
#      '    '    '    '    '    '    '    '
$_ = q{....fred1....fred2...fred3....fred4..};

while (/fred(?(?{ pos % 4 != 0 })(?!))(....)/sg) {

}

--output:--
Use of uninitialized value in numeric ne (!=) at (re_eval 1) line 1.
Use of uninitialized value in numeric ne (!=) at (re_eval 1) line 1.
Use of uninitialized value in numeric ne (!=) at (re_eval 1) line 1.
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Comment on Re^3: A regex that only matches at offset that are multiples of a given N? Download Code

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Re^4: A regex that only matches at offset that are multiples of a given N? by smls (Friar) on Feb 14, 2013 at 21:16 UTC
Ah yes, you need to add parenthesis after the pos (to make sure it is interpreted as a function without parameters): /fred(?(?{ pos() % 4 != 0 })(?!))(....)/sg I fixed that locally while testing ikegami's regex but then forgot about it when reporting back, sorry.	[reply]

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