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#!/usr/bin/perl -w
# Copyright 2008, 2009, 2010 Kevin Ryde
# This file is part of constant-defer.
#
# constant-defer is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
#
# constant-defer is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with constant-defer. If not, see <http://www.gnu.org/licenses/>.
use strict;
use warnings;
{
sub make_subr {
return sub { 123 };
}
my $x = make_subr();
require Scalar::Util;
require Data::Dumper;
Scalar::Util::weaken($x);
print Data::Dumper->Dump([\$x],['x']);
# require Devel::FindRef;
# print Devel::FindRef::track(\$x);
no warnings 'redefine';
*make_subr = sub {};
print Data::Dumper->Dump([\$x],['x']);
sub make_two {
my ($a) = @_;
return sub { $a };
}
$x = make_two(123);
my $y = make_two(456);
Scalar::Util::weaken($x);
#Scalar::Util::weaken($y);
print Data::Dumper->Dump([\$x],['x']);
print Data::Dumper->Dump([\$y],['y']);
exit 0;
}
{
use constant::defer my_ctime => sub { return 123;
#require POSIX;
#return POSIX::ctime(time());
};
my $orig = \&my_ctime;
print my_ctime(),"\n";
my $const = \&my_ctime;
print "orig $orig\n";
print "const $const\n";
print "subr ",$constant::defer::DEBUG_LAST_SUBR,"\n";
require Scalar::Util;
Scalar::Util::weaken($constant::defer::DEBUG_LAST_SUBR);
print "subr ",$constant::defer::DEBUG_LAST_SUBR,"\n";
exit 0;
}
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