You probably don't want a character class [#\d+,], but rather a (non-capturing) group: (?:#\d+,). But the real problem you're having is that the preceding .* is gobbling up the optional part. So, make it non-greedy, i.e. .*? 

for my $update_p4filelog (
    "...xyz branch from //source/qcom/qct/multimedia/qtv/player/audiop
+layer/rel/1.1/src/file.cpp#1,#8",
    "...xyz branch from //source/qcom/qct/multimedia/qtv/player/audiop
+layer/rel/1.1/src/file.cpp#8",
    ) {

    my ($path, $ver) = $update_p4filelog =~ /branch from (.*\/.*?)(?:#
+\d+,)?(#\d+)$/;
    
    my $update_base_branched_p4path = "$path$ver";
    
    print "$update_base_branched_p4path\n";
}

__END__
//source/qcom/qct/multimedia/qtv/player/audioplayer/rel/1.1/src/file.c
+pp#8
//source/qcom/qct/multimedia/qtv/player/audioplayer/rel/1.1/src/file.c
+pp#8

[download]

In reply to Re^9: Regex to grab data after the work "branch from" by Anonyrnous Monk
in thread Regex to grab data after the work "branch from" by perl_mystery

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