Re^2: 'g' flag with 'qr' (different commands) (updated)

You said: "short answer for why is that m// is a different command compared to m//g".

I was noting the similarity between these forms:

my $foo="regexp";
my @matches = $foo =~ /(re)ge(xp)/;

#and

my $regex=qr{(re)ge(xp)};
my @matches = $foo =~ $regex;
[download]

In both of the above, "@matches" will get 2 entries "re" and "xp". I find it unfortunate that if your regexp was doubled, there is no way to directly use qr w/'g' i.e. one must use the m{} or // type form as in:

> perl -we'use strict;use P;
my $regex=qr{(re)ge(xp)};
my @matches0 = "regexpregexp" =~ /(re)ge(xp)/g;
my @matches = "regexpregexp" =~ $regex;
my @matches1 = "regexpregexp" =~ /$regex/g;
P "matches=%s, 0=%s, 1=%s", \@matches, \@matches0, \@matches1; 
'
matches=["re", "xp"], 0=["re", "xp", "re", "xp"], 1=["re", "xp", "re",
+ "xp"]
[download]

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Re^3: 'g' flag with 'qr' (different commands) (updated) by AnomalousMonk (Archbishop) on May 30, 2016 at 04:01 UTC
I find it unfortunate ... Sometimes life's like that. So far, you've only advocated the utility and desirability of code like `my $regex = qr{...}g;` `...;` `... $string =~ $regex;` in which `... $string =~ $regex;` would be equivalent to the current usage `... $string =~ /$regex/g;` given that `qr//g` is not now supported. I think you need to consider the implications of the cases raised by haukex here. These (and I'm sure many other) cases would need to be given defined behaviors. Surely, you do not intend the `qr//g` feature to apply only to the `$string =~ $regex` case? If so, this feature would seem to fall squarely into the "some developer's personal 'pet feature'" category. Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re^3: 'g' flag with 'qr' (different commands) by LanX (Saint) on May 30, 2016 at 11:13 UTC
> I find it unfortunate that. .. I don't. Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Je suis Charlie!}	[reply]