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Would be easier if you provided sample data.

The basic idea is to use or conditions, which match first an escaped sequence, secondly a directive and then a single character.

With a /g modifier within a while condition the match will start where the last one ended.

Group only on your directives.


2 proofs of concept:

The second one w/o while loop.

Please notice that you need to check for defined, since every escape or single character is an empty (since ungrouped) match.

DB<120> $str='xxx@@xx\@xx@abc\@xxx@efg@\xxx' => "xxx\@\@xx\\\@xx\@abc\\\@xxx\@efg\@\\xxx" DB<121> print ( defined $1 ? "$1\t" : "") while ( $str =~ m/ (?: [\\ +\@]{2} | ( \@\w+ ) | . ) /xg ) @abc @efg DB<122> grep { defined } $str =~ m/ (?: [\\\@]{2} | ( \@\w+ ) | . ) +/xg => ("\@abc", "\@efg")


more efficient:

DB<135> grep {defined} $str =~ m/ (?: [\\\@]{2}+ | ( [\\\@]\w+ ) | [ +^\\\@]+ ) /xg => ("\@abc", "\@efg")

Cheers Rolf

( addicted to the Perl Programming Language)

In reply to Re: better way to escape escapes (updated) by LanX
in thread better way to escape escapes by RonW

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