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package YAML::Any;
use 5.005003;
use strict;
use Exporter ();
$YAML::Any::VERSION = '0.71';
@YAML::Any::ISA = 'Exporter';
@YAML::Any::EXPORT = qw(Dump Load);
@YAML::Any::EXPORT_OK = qw(DumpFile LoadFile);
my @dump_options = qw(
UseCode
DumpCode
SpecVersion
Indent
UseHeader
UseVersion
SortKeys
AnchorPrefix
UseBlock
UseFold
CompressSeries
InlineSeries
UseAliases
Purity
Stringify
);
my @load_options = qw(
UseCode
LoadCode
);
my @implementations = qw(
YAML::XS
YAML::Syck
YAML::Old
YAML
YAML::Tiny
);
sub import {
__PACKAGE__->implementation;
goto &Exporter::import;
}
sub Dump {
no strict 'refs';
my $implementation = __PACKAGE__->implementation;
for my $option (@dump_options) {
my $var = "$implementation\::$option";
my $value = $$var;
local $$var;
$$var = defined $value ? $value : ${"YAML::$option"};
}
return &{"$implementation\::Dump"}(@_);
}
sub DumpFile {
no strict 'refs';
my $implementation = __PACKAGE__->implementation;
for my $option (@dump_options) {
my $var = "$implementation\::$option";
my $value = $$var;
local $$var;
$$var = defined $value ? $value : ${"YAML::$option"};
}
return &{"$implementation\::DumpFile"}(@_);
}
sub Load {
no strict 'refs';
my $implementation = __PACKAGE__->implementation;
for my $option (@load_options) {
my $var = "$implementation\::$option";
my $value = $$var;
local $$var;
$$var = defined $value ? $value : ${"YAML::$option"};
}
return &{"$implementation\::Load"}(@_);
}
sub LoadFile {
no strict 'refs';
my $implementation = __PACKAGE__->implementation;
for my $option (@load_options) {
my $var = "$implementation\::$option";
my $value = $$var;
local $$var;
$$var = defined $value ? $value : ${"YAML::$option"};
}
return &{"$implementation\::LoadFile"}(@_);
}
sub order {
return @YAML::Any::_TEST_ORDER
if defined @YAML::Any::_TEST_ORDER;
return @implementations;
}
sub implementation {
my @order = __PACKAGE__->order;
for my $module (@order) {
my $path = $module;
$path =~ s/::/\//g;
$path .= '.pm';
return $module if exists $INC{$path};
eval "require $module; 1" and return $module;
}
croak("YAML::Any couldn't find any of these YAML implementations: @order");
}
sub croak {
require Carp;
Carp::Croak(@_);
}
1;
=head1 NAME
YAML::Any - Pick a YAML implementation and use it.
=head1 SYNOPSIS
use YAML::Any;
$YAML::Indent = 3;
my $yaml = Dump(@objects);
=head1 DESCRIPTION
There are several YAML implementations that support the Dump/Load API.
This module selects the best one available and uses it.
=head1 ORDER
Currently, YAML::Any will choose the first one of these YAML
implementations that is installed on your system:
YAML::XS
YAML::Syck
YAML::Old
YAML
YAML::Tiny
=head1 OPTIONS
If you specify an option like:
$YAML::Indent = 4;
And YAML::Any is using YAML::XS, it will use the proper variable:
$YAML::XS::Indent.
=head1 SUBROUTINES
Like all the YAML modules that YAML::Any uses, the following subroutines
are exported by default:
Dump
Load
and the following subroutines are exportable by request:
DumpFile
LoadFile
=head1 METHODS
YAML::Any provides the following class methods.
=over
=item YAML::Any->order;
This method returns a list of the current possible implementations that
YAML::Any will search for.
=item YAML::Any->implementation;
This method returns the implementation the YAML::Any will use. This
result is obtained by finding the first member of YAML::Any->order that
is either already loaded in C<%INC> or that can be loaded using
C<require>. If no implementation is found, an error will be thrown.
=back
=head1 AUTHOR
Ingy döt Net <ingy@cpan.org>
=head1 COPYRIGHT
Copyright (c) 2008. Ingy döt Net.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See L<http://www.perl.com/perl/misc/Artistic.html>
=cut
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