Faster.pm
上传用户:market2
上传日期:2018-11-18
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文件大小:2k
- package Class::Accessor::Faster;
- use base 'Class::Accessor';
- use strict;
- $Class::Accessor::Faster::VERSION = '0.33';
- =head1 NAME
- Class::Accessor::Faster - Even faster, but less expandable, accessors
- =head1 SYNOPSIS
- package Foo;
- use base qw(Class::Accessor::Faster);
- =head1 DESCRIPTION
- This is a faster but less expandable version of Class::Accessor::Fast.
- Class::Accessor's generated accessors require two method calls to accompish
- their task (one for the accessor, another for get() or set()).
- Class::Accessor::Fast eliminates calling set()/get() and does the access itself,
- resulting in a somewhat faster accessor.
- Class::Accessor::Faster uses an array reference underneath to be faster.
- Read the documentation for Class::Accessor for more info.
- =cut
- my %slot;
- sub _slot {
- my($class, $field) = @_;
- my $n = $slot{$class}->{$field};
- return $n if defined $n;
- $n = keys %{$slot{$class}};
- $slot{$class}->{$field} = $n;
- return $n;
- }
- sub new {
- my($proto, $fields) = @_;
- my($class) = ref $proto || $proto;
- my $self = bless [], $class;
- $fields = {} unless defined $fields;
- for my $k (keys %$fields) {
- my $n = $class->_slot($k);
- $self->[$n] = $fields->{$k};
- }
- return $self;
- }
- sub make_accessor {
- my($class, $field) = @_;
- my $n = $class->_slot($field);
- return sub {
- return $_[0]->[$n] if @_ == 1;
- return $_[0]->[$n] = $_[1] if @_ == 2;
- return (shift)->[$n] = @_;
- };
- }
- sub make_ro_accessor {
- my($class, $field) = @_;
- my $n = $class->_slot($field);
- return sub {
- return $_[0]->[$n] if @_ == 1;
- my $caller = caller;
- $_[0]->_croak("'$caller' cannot alter the value of '$field' on objects of class '$class'");
- };
- }
- sub make_wo_accessor {
- my($class, $field) = @_;
- my $n = $class->_slot($field);
- return sub {
- if (@_ == 1) {
- my $caller = caller;
- $_[0]->_croak("'$caller' cannot access the value of '$field' on objects of class '$class'");
- } else {
- return $_[0]->[$n] = $_[1] if @_ == 2;
- return (shift)->[$n] = @_;
- }
- };
- }
- =head1 AUTHORS
- Copyright 2007 Marty Pauley <marty+perl@kasei.com>
- This program is free software; you can redistribute it and/or modify it under
- the same terms as Perl itself. That means either (a) the GNU General Public
- License or (b) the Artistic License.
- =head1 SEE ALSO
- L<Class::Accessor>
- =cut
- 1;