John Maddock wrote:
Mihaly Zachar wrote:
unfortunately this is a real problem... I'm interworking with an existing perl system and it provides me rexes what I sohuld use.
We should have the same result for the same regexes.
mitya@stamford:~$ perl -e '$in = "1111"; $in =~ s/(.*)/0$1/; print $in."\n"' 01111 mitya@stamford:~$
to set match_not_null is not good for me :(
OK so the Perl code doesn't set the /g modifier so it only replaces the first match found: you can get the same behaviour in Boost.Regex by passing the format_first_only flag as the last argument to regex_replace.
In other words the defaults are different: Boost.Regex defaults to "replace all occurences" but you can choose to replace just the first one if you want, and Perl is the other way around.
great, I know why does it work in this way !!! thanks very much for for you and Stephen Nuchia too Regards, Misi