Hello dear Monks,

Today I've encountered a problem which, really, drives me crazy.
Here is a small portion of the code which illustrates my issue: 
#!/usr/bin/perl

use 5.010;
use strict;
use warnings;

use re 'eval';

sub make_esc_delim {
    my ($delim) = @_;
    return qr{\Q$delim\E[^$delim\\]*+(?>\\.|[^$delim\\]+)*\Q$delim\E}s
+;
}

my $str_dq = make_esc_delim(q{"});

my %bpairs;
{
    local $" = q{};
    foreach my $d ([qw~< >~], [qw~( )~], [qw~{ }~], [qw~[ ]~]) {
        my @ed = map {quotemeta} @{$d};

         $bpairs{$d->[0]} =
         qr{
            $ed[0]
            (?<content>
                (?>
                    (??{$bpairs{$d->[0]}}) (?{print "After eval!\n"})
                            |
                       (?> $str_dq | [^@ed] )
                )*
            )
            $ed[1]
        }xs;
    }
}

my $x = q~func{{xx|"}"} @{d}end}~;

if($x =~ /$bpairs{'{'}/){
    print "First matched: $&\n";
}

if($x =~ /func$bpairs{'{'}/){       # here is the problem
    print "Second matched: $&\n";
}

[download]
Output: 
After eval!
After eval!
First matched: {{xx|"}"} @{d}end}
Global symbol "$d" requires explicit package name at (re_eval 9) line 
+1.
Compilation failed in regexp at test.pl line 43.

[download]

The question is: why perl doesn't let me to add some text around the compiled regex that embeds reevaluation of itself?
Should I consider this a bug?
Is there any other way around this issue?

Currently, I'm using: perl 5, version 16, subversion 2 (v5.16.2) built for i686-linux-thread-multi

Thank you very much.

In reply to Regex re_eval - requires explicit package name by trizen

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