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use strict;
use warnings;
package Test::Deep::Cache::Simple;
use Carp qw( confess );
use Scalar::Util qw( weaken refaddr );
sub new
{
my $pkg = shift;
my $self = bless {}, $pkg;
return $self;
}
sub add
{
my $self = shift;
my ($d1, $d2) = @_;
{
local $SIG{__DIE__};
# cannot weaken read only refs, no harm if we can't as they never
# disappear
eval{weaken($d1)};
eval{weaken($d2)};
}
$self->{fn_get_key(@_)} = [$d1, $d2];
}
sub cmp
{
my $self = shift;
my $key = fn_get_key(@_);
my $pair = $self->{$key};
# are both weakened refs still valid, if not delete this entry
if (ref($pair->[0]) and ref($pair->[1]))
{
return 1;
}
else
{
delete $self->{$key};
return 0;
}
}
sub absorb
{
my $self = shift;
my $other = shift;
@{$self}{keys %$other} = values %$other;
}
sub fn_get_key
{
return join(",", sort (map {refaddr($_)} @_));
}
1;
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