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
________________________________________
From: Boston-pm <boston-pm-bounces+remorse=mgh.harvard....@pm.org> on behalf of
em...@greglondon.com <em...@greglondon.com>
Sent: Friday, February 25, 2022 1:19 PM
To: boston-pm@pm.org
Subject: [Boston.pm] more specific regex error messages?
External Email - Use Caution
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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