/usr/share/perl5/Class/MakeMethods/Template/Ref.pm is in libclass-makemethods-perl 1.01-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 | =head1 NAME
Class::MakeMethods::Template::Ref - Universal copy and compare methods
=head1 SYNOPSIS
package MyObject;
use Class::MakeMethods::Template::Ref (
'Hash:new' => [ 'new' ],
clone => [ 'clone' ]
);
package main;
my $obj = MyObject->new( foo => ["Foozle", "Bozzle"] );
my $clone = $obj->clone();
print $obj->{'foo'}[1];
=cut
package Class::MakeMethods::Template::Ref;
$VERSION = 1.008;
use strict;
require 5.00;
use Carp;
use Class::MakeMethods::Template '-isasubclass';
use Class::MakeMethods::Utility::Ref qw( ref_clone ref_compare );
######################################################################
=head1 DESCRIPTION
The following types of methods are provided via the Class::MakeMethods interface:
=head2 clone
Produce a deep copy of an instance of almost any underlying datatype.
Parameters:
init_method
If defined, this method is called on the new object with any arguments passed in.
=cut
sub clone {
{
'params' => { 'init_method' => '' },
'interface' => {
default => 'clone',
clone => { '*'=>'clone', },
},
'behavior' => {
'clone' => sub { my $m_info = $_[0]; sub {
my $callee = shift;
ref $callee or croak "Can only copy instances, not a class.\n";
my $self = ref_clone( $callee );
my $init_method = $m_info->{'init_method'};
if ( $init_method ) {
$self->$init_method( @_ );
} elsif ( scalar @_ ) {
croak "No init_method";
}
return $self;
}},
},
}
}
######################################################################
=head2 prototype
Create new instances by making a deep copy of a static prototypical instance.
Parameters:
init_method
If defined, this method is called on the new object with any arguments passed in.
=cut
sub prototype {
( {
'interface' => {
default => { '*'=>'set_or_new', },
},
'behavior' => {
'set_or_new' => sub { my $m_info = $_[0]; sub {
my $class = shift;
if ( scalar @_ == 1 and UNIVERSAL::isa( $_[0], $class ) ) {
# set
$m_info->{'instance'} = shift
} else {
# get
croak "Prototype is not defined" unless $m_info->{'instance'};
my $self = ref_clone($m_info->{'instance'});
my $init_method = $m_info->{'init_method'};
if ( $init_method ) {
$self->$init_method( @_ );
} elsif ( scalar @_ ) {
croak "No init_method";
}
return $self;
}
}},
'set' => sub { my $m_info = $_[0]; sub {
my $class = shift;
$m_info->{'instance'} = shift
}},
'new' => sub { my $m_info = $_[0]; sub {
my $class = shift;
croak "Prototype is not defined" unless $m_info->{'instance'};
my $self = ref_clone($m_info->{'instance'});
my $init_method = $m_info->{'init_method'};
if ( $init_method ) {
$self->$init_method( @_ );
} elsif ( scalar @_ ) {
croak "No init_method";
}
return $self;
}},
},
} )
}
######################################################################
=head2 compare
Compare one object to another.
B<Templates>
=over 4
=item *
default
Three-way (sorting-style) comparison.
=item *
equals
Are these two objects equivalent?
=item *
identity
Are these two references to the exact same object?
=back
=cut
sub compare {
{
'params' => { 'init_method' => '' },
'interface' => {
default => { '*'=>'compare', },
equals => { '*'=>'equals', },
identity => { '*'=>'identity', },
},
'behavior' => {
'compare' => sub { my $m_info = $_[0]; sub {
my $callee = shift;
ref_compare( $callee, shift );
}},
'equals' => sub { my $m_info = $_[0]; sub {
my $callee = shift;
ref_compare( $callee, shift ) == 0;
}},
'identity' => sub { my $m_info = $_[0]; sub {
$_[0] eq $_[1]
}},
},
}
}
######################################################################
=head1 SEE ALSO
See L<Class::MakeMethods> for general information about this distribution.
See L<Class::MakeMethods::Template> for more about this family of subclasses.
See L<Class::MakeMethods::Utility::Ref> for the clone and compare functions used above.
=cut
######################################################################
1;
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