Re: [Boston.pm] more specific regex error messages?

Maybe something like "use re 'debug'"?

https://perldoc.perl.org/re#'debug'-mode

There's a bunch of options, and it seems to be present, at least in some form, as early as Perl 5.10?

Ricky

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Subject: [Boston.pm] more specific regex error messages?

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I have a rather complex regex that I'm throwing text at.

if($str=~m/\Athing1\:thing2\,thing3\@(\w+)\?(\d+)\Z/){
    # process str
} else {
    die "bad str 'str' ";
}

Is there a way to get better built in reporting with regexps?
with the above, if the string doesn't match, I get "bad input".

What I'd rather get is something like "expecting \:thing2"

if need be, I'll break it into a series of nested ifs.
but that would be exceedingly ugly.

The pattern does not require backtracking.
I've already checked that I'm in a certain location and only one kind of
input is expected.

and again, I can't load external modules at work.

suggestions?
Greg




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