Sorry Aristotle, but this is far from "unbreakable". In fact it doesn't even compile? You can't apply the /g modifier to qr//.

Your version

#! perl -slw
use strict;
require 5.008;

sub make_dequote_rx {
    my @char = map quotemeta, @_;
    my $chars = join '', @char;
    my $rx = join(
        '|',
        map(qq[$_ (?: \\ . | $_$_ | [^$_] ) + $_], @char),
        qq[(?: \\ . | [^$chars] ) +],
    );
    return qr/\G ( $rx )/x; ##You cannot apply /g to qr//
}

my $dequote = make_dequote_rx qw(' "); #"

while( <DATA> ){
    chomp;
    our $quoted;
    print;
    print "\t<$1>" while m[$dequote]g;
    print '';
}

__DATA__
unquoted stuff "quoted stuff" unquoted stuff
unquoted stuff 'quoted stuff' unquoted stuff
unquoted stuff "quoted stuff with embedded 'alternate' quotes" unquote
+d stuff
unquoted stuff 'quoted stuff with embedded "alternate" quotes' unquote
+d stuff
unquoted stuff "quoted stuff with embedded ""like"" quotes" unquoted s
+tuff
unquoted stuff 'quoted stuff with embedded ''like'' quotes' unquoted s
+tuff
unquoted stuff "quoted stuff with embedded """"like"""" quotes" unquot
+ed stuff
unquoted stuff 'quoted stuff with embedded ''''like'''' quotes' unquot
+ed stuff
unquoted stuff "quoted 'stuff' with escaped \"like\" quotes" unquoted 
+stuff
unquoted stuff 'quoted 'stuff' with escaped \'like\' quotes' unquoted 
+stuff
unquoted stuff "quoted stuff with embedded ""like"" quotes and escaped
+ \"like\" quotes" unquoted stuff
unquoted stuff 'quoted stuff with embedded ''like'' quotes and escaped
+ \'like\' quotes' unquoted stuff

[download]

Output

D:\Perl\test>junk
unquoted stuff "quoted stuff" unquoted stuff
        <unquoted stuff "quoted stuff>

unquoted stuff 'quoted stuff' unquoted stuff
        <unquoted stuff 'quoted stuff>

unquoted stuff "quoted stuff with embedded 'alternate' quotes" unquote
+d stuff
        <unquoted stuff "quoted stuff with embedded 'alternate>

unquoted stuff 'quoted stuff with embedded "alternate" quotes' unquote
+d stuff
        <unquoted stuff 'quoted stuff with embedded "alternate>

unquoted stuff "quoted stuff with embedded ""like"" quotes" unquoted s
+tuff
        <unquoted stuff "quoted stuff with embedded ">
        <"like"" quotes">
        < unquoted stuff>

unquoted stuff 'quoted stuff with embedded ''like'' quotes' unquoted s
+tuff
        <unquoted stuff 'quoted stuff with embedded '>
        <'like'' quotes'>
        < unquoted stuff>

unquoted stuff "quoted stuff with embedded """"like"""" quotes" unquot
+ed stuff
        <unquoted stuff "quoted stuff with embedded ">
        <"""like"""" quotes">
        < unquoted stuff>

unquoted stuff 'quoted stuff with embedded ''''like'''' quotes' unquot
+ed stuff
        <unquoted stuff 'quoted stuff with embedded '>
        <'''like'''' quotes'>
        < unquoted stuff>

unquoted stuff "quoted 'stuff' with escaped \"like\" quotes" unquoted 
+stuff
        <unquoted stuff "quoted 'stuff>

unquoted stuff 'quoted 'stuff' with escaped \'like\' quotes' unquoted 
+stuff
        <unquoted stuff 'quoted 'stuff>
        <' with escaped \'>
        <like\>
        <' quotes'>
        < unquoted stuff>

unquoted stuff "quoted stuff with embedded ""like"" quotes and escaped
+ \"like\" quotes" unquoted stuff
        <unquoted stuff "quoted stuff with embedded ">
        <"like"" quotes and escaped \">
        <like\>
        <" quotes">
        < unquoted stuff>

unquoted stuff 'quoted stuff with embedded ''like'' quotes and escaped
+ \'like\' quotes' unquoted stuff
        <unquoted stuff 'quoted stuff with embedded '>
        <'like'' quotes and escaped \'>
        <like\>
        <' quotes'>
        < unquoted stuff>

[download]
Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." -Richard Buckminster Fuller

In reply to Re: Re^5: Perlre interpretation required by BrowserUk
in thread Perlre interpretation required by BrowserUk

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