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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;
{
use constant::defer foo => sub { print "foo runs\n"; 123 };
my $x = \&foo;
{ no warnings 'redefine';
*foo = sub () { print "new foo runs\n"; 456 };
}
require Scalar::Util;
print "func ",$x//'undef',"\n";
Scalar::Util::weaken ($x);
print "func ",$x//'undef',"\n";
my $y = $constant::defer::DEBUG_LAST_RUNNER;
undef $constant::defer::DEBUG_LAST_RUNNER;
print "runner ",($y//'undef'),"\n";
Scalar::Util::weaken ($y);
print "runner ",($y//'undef'),"\n";
# if (defined $y) {
# print "y value ",$y->(),"\n";
# print "runner ",($y//'undef'),"\n";
# }
if (defined $y) {
require Devel::FindRef;
print Devel::FindRef::track($y);
}
exit 0;
}
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