#######################################################################
BEGIN {
- push(@INC, "modules");
+ unshift @INC, "modules/YAML"; # Use our own version of YAML.
+ push @INC, "modules"; # Only use our own versions of modules if there's no system version.
}
# setup defaults, DO NOT CHANGE
#######################################################################
BEGIN {
- push(@INC, "modules");
+ unshift @INC, "modules/YAML"; # Use our own version of YAML.
+ push @INC, "modules"; # Only use our own versions of modules if there's no system version.
}
# setup defaults, DO NOT CHANGE
--- /dev/null
+NAME
+ YAML - YAML Ain't Markup Language (tm)
+
+SYNOPSIS
+ use YAML;
+
+ # Load a YAML stream of 3 YAML documents into Perl data structures.
+ my ($hashref, $arrayref, $string) = Load(<<'...');
+ ---
+ name: ingy
+ age: old
+ weight: heavy
+ # I should comment that I also like pink, but don't tell anybody.
+ favorite colors:
+ - red
+ - green
+ - blue
+ ---
+ - Clark Evans
+ - Oren Ben-Kiki
+ - Ingy döt Net
+ --- >
+ You probably think YAML stands for "Yet Another Markup Language". It
+ ain't! YAML is really a data serialization language. But if you want
+ to think of it as a markup, that's OK with me. A lot of people try
+ to use XML as a serialization format.
+
+ "YAML" is catchy and fun to say. Try it. "YAML, YAML, YAML!!!"
+ ...
+
+ # Dump the Perl data structures back into YAML.
+ print Dump($string, $arrayref, $hashref);
+
+ # YAML::Dump is used the same way you'd use Data::Dumper::Dumper
+ use Data::Dumper;
+ print Dumper($string, $arrayref, $hashref);
+
+DESCRIPTION
+ The YAML.pm module implements a YAML Loader and Dumper based on the YAML
+ 1.0 specification. <http://www.yaml.org/spec/>
+
+ YAML is a generic data serialization language that is optimized for
+ human readability. It can be used to express the data structures of most
+ modern programming languages. (Including Perl!!!)
+
+ For information on the YAML syntax, please refer to the YAML
+ specification.
+
+WHY YAML IS COOL
+ YAML is readable for people.
+ It makes clear sense out of complex data structures. You should find
+ that YAML is an exceptional data dumping tool. Structure is shown
+ through indentation, YAML supports recursive data, and hash keys are
+ sorted by default. In addition, YAML supports several styles of
+ scalar formatting for different types of data.
+
+ YAML is editable.
+ YAML was designed from the ground up to be an excellent syntax for
+ configuration files. Almost all programs need configuration files,
+ so why invent a new syntax for each one? And why subject users to
+ the complexities of XML or native Perl code?
+
+ YAML is multilingual.
+ Yes, YAML supports Unicode. But I'm actually referring to
+ programming languages. YAML was designed to meet the serialization
+ needs of Perl, Python, Ruby, Tcl, PHP, Javascript and Java. It was
+ also designed to be interoperable between those languages. That
+ means YAML serializations produced by Perl can be processed by
+ Python.
+
+ YAML is taint safe.
+ Using modules like Data::Dumper for serialization is fine as long as
+ you can be sure that nobody can tamper with your data files or
+ transmissions. That's because you need to use Perl's "eval()"
+ built-in to deserialize the data. Somebody could add a snippet of
+ Perl to erase your files.
+
+ YAML's parser does not need to eval anything.
+
+ YAML is full featured.
+ YAML can accurately serialize all of the common Perl data structures
+ and deserialize them again without losing data relationships.
+ Although it is not 100% perfect (no serializer is or can be
+ perfect), it fares as well as the popular current modules:
+ Data::Dumper, Storable, XML::Dumper and Data::Denter.
+
+ YAML.pm also has the ability to handle code (subroutine) references
+ and typeglobs. (Still experimental) These features are not found in
+ Perl's other serialization modules.
+
+ YAML is extensible.
+ The YAML language has been designed to be flexible enough to solve
+ it's own problems. The markup itself has 3 basic construct which
+ resemble Perl's hash, array and scalar. By default, these map to
+ their Perl equivalents. But each YAML node also supports a tagging
+ mechanism (type system) which can cause that node to be interpreted
+ in a completely different manner. That's how YAML can support object
+ serialization and oddball structures like Perl's typeglob.
+
+YAML IMPLEMENTATIONS IN PERL
+ This module, YAML.pm, is really just the interface module for YAML
+ modules written in Perl. The basic interface for YAML consists of two
+ functions: "Dump" and "Load". The real work is done by the modules
+ YAML::Dumper and YAML::Loader.
+
+ Different YAML module distributions can be created by subclassing
+ YAML.pm and YAML::Loader and YAML::Dumper. For example, YAML-Simple
+ consists of YAML::Simple YAML::Dumper::Simple and YAML::Loader::Simple.
+
+ Why would there be more than one implementation of YAML? Well, despite
+ YAML's offering of being a simple data format, YAML is actually very
+ deep and complex. Implementing the entirety of the YAML specification is
+ a daunting task.
+
+ For this reason I am currently working on 3 different YAML
+ implementations.
+
+ YAML
+ The main YAML distribution will keeping evolving to support the
+ entire YAML specification in pure Perl. This may not be the fastest
+ or most stable module though. Currently, YAML.pm has lots of known
+ bugs. It is mostly a great tool for dumping Perl data structures to
+ a readable form.
+
+ YAML::Lite
+ The point of YAML::Lite is to strip YAML down to the 90% that people
+ use most and offer that in a small, fast, stable, pure Perl form.
+ YAML::Lite will simply die when it is asked to do something it
+ can't.
+
+ YAML::Syck
+ "libsyck" is the C based YAML processing library used by the Ruby
+ programming language (and also Python, PHP and Pugs). YAML::Syck is
+ the Perl binding to "libsyck". It should be very fast, but may have
+ problems of its own. It will also require C compilation.
+
+ NOTE: Audrey Tang has actually completed this module and it works
+ great and is 10 times faster than YAML.pm.
+
+ In the future, there will likely be even more YAML modules. Remember,
+ people other than Ingy are allowed to write YAML modules!
+
+FUNCTIONAL USAGE
+ YAML is completely OO under the hood. Still it exports a few useful top
+ level functions so that it is dead simple to use. These functions just
+ do the OO stuff for you. If you want direct access to the OO API see the
+ documentation for YAML::Dumper and YAML::Loader.
+
+ Exported Functions
+ The following functions are exported by YAML.pm by default. The reason
+ they are exported is so that YAML works much like Data::Dumper. If you
+ don't want functions to be imported, just use YAML with an empty import
+ list:
+
+ use YAML ();
+
+ Dump(list-of-Perl-data-structures)
+ Turn Perl data into YAML. This function works very much like
+ Data::Dumper::Dumper(). It takes a list of Perl data strucures and
+ dumps them into a serialized form. It returns a string containing
+ the YAML stream. The structures can be references or plain scalars.
+
+ Load(string-containing-a-YAML-stream)
+ Turn YAML into Perl data. This is the opposite of Dump. Just like
+ Storable's thaw() function or the eval() function in relation to
+ Data::Dumper. It parses a string containing a valid YAML stream into
+ a list of Perl data structures.
+
+ Exportable Functions
+ These functions are not exported by default but you can request them in
+ an import list like this:
+
+ use YAML qw'freeze thaw Bless';
+
+ freeze() and thaw()
+ Aliases to Dump() and Load() for Storable fans. This will also allow
+ YAML.pm to be plugged directly into modules like POE.pm, that use
+ the freeze/thaw API for internal serialization.
+
+ DumpFile(filepath, list)
+ Writes the YAML stream to a file instead of just returning a string.
+
+ LoadFile(filepath)
+ Reads the YAML stream from a file instead of a string.
+
+ Bless(perl-node, [yaml-node | class-name])
+ Associate a normal Perl node, with a yaml node. A yaml node is an
+ object tied to the YAML::Node class. The second argument is either a
+ yaml node that you've already created or a class (package) name that
+ supports a yaml_dump() function. A yaml_dump() function should take
+ a perl node and return a yaml node. If no second argument is
+ provided, Bless will create a yaml node. This node is not returned,
+ but can be retrieved with the Blessed() function.
+
+ Here's an example of how to use Bless. Say you have a hash
+ containing three keys, but you only want to dump two of them.
+ Furthermore the keys must be dumped in a certain order. Here's how
+ you do that:
+
+ use YAML qw(Dump Bless);
+ $hash = {apple => 'good', banana => 'bad', cauliflower => 'ugly'};
+ print Dump $hash;
+ Bless($hash)->keys(['banana', 'apple']);
+ print Dump $hash;
+
+ produces:
+
+ ---
+ apple: good
+ banana: bad
+ cauliflower: ugly
+ ---
+ banana: bad
+ apple: good
+
+ Bless returns the tied part of a yaml-node, so that you can call the
+ YAML::Node methods. This is the same thing that YAML::Node::ynode()
+ returns. So another way to do the above example is:
+
+ use YAML qw(Dump Bless);
+ use YAML::Node;
+ $hash = {apple => 'good', banana => 'bad', cauliflower => 'ugly'};
+ print Dump $hash;
+ Bless($hash);
+ $ynode = ynode(Blessed($hash));
+ $ynode->keys(['banana', 'apple']);
+ print Dump $hash;
+
+ Note that Blessing a Perl data structure does not change it anyway.
+ The extra information is stored separately and looked up by the
+ Blessed node's memory address.
+
+ Blessed(perl-node)
+ Returns the yaml node that a particular perl node is associated with
+ (see above). Returns undef if the node is not (YAML) Blessed.
+
+GLOBAL OPTIONS
+ YAML options are set using a group of global variables in the YAML
+ namespace. This is similar to how Data::Dumper works.
+
+ For example, to change the indentation width, do something like:
+
+ local $YAML::Indent = 3;
+
+ The current options are:
+
+ DumperClass
+ You can override which module/class YAML uses for Dumping data.
+
+ LoaderClass
+ You can override which module/class YAML uses for Loading data.
+
+ Indent
+ This is the number of space characters to use for each indentation
+ level when doing a Dump(). The default is 2.
+
+ By the way, YAML can use any number of characters for indentation at
+ any level. So if you are editing YAML by hand feel free to do it
+ anyway that looks pleasing to you; just be consistent for a given
+ level.
+
+ SortKeys
+ Default is 1. (true)
+
+ Tells YAML.pm whether or not to sort hash keys when storing a
+ document.
+
+ YAML::Node objects can have their own sort order, which is usually
+ what you want. To override the YAML::Node order and sort the keys
+ anyway, set SortKeys to 2.
+
+ Stringify
+ Default is 0. (false)
+
+ Objects with string overloading should honor the overloading and
+ dump the stringification of themselves, rather than the actual
+ object's guts.
+
+ UseHeader
+ Default is 1. (true)
+
+ This tells YAML.pm whether to use a separator string for a Dump
+ operation. This only applies to the first document in a stream.
+ Subsequent documents must have a YAML header by definition.
+
+ UseVersion
+ Default is 0. (false)
+
+ Tells YAML.pm whether to include the YAML version on the
+ separator/header.
+
+ --- %YAML:1.0
+
+ AnchorPrefix
+ Default is ''.
+
+ Anchor names are normally numeric. YAML.pm simply starts with '1'
+ and increases by one for each new anchor. This option allows you to
+ specify a string to be prepended to each anchor number.
+
+ UseCode
+ Setting the UseCode option is a shortcut to set both the DumpCode
+ and LoadCode options at once. Setting UseCode to '1' tells YAML.pm
+ to dump Perl code references as Perl (using B::Deparse) and to load
+ them back into memory using eval(). The reason this has to be an
+ option is that using eval() to parse untrusted code is, well,
+ untrustworthy.
+
+ DumpCode
+ Determines if and how YAML.pm should serialize Perl code references.
+ By default YAML.pm will dump code references as dummy placeholders
+ (much like Data::Dumper). If DumpCode is set to '1' or 'deparse',
+ code references will be dumped as actual Perl code.
+
+ DumpCode can also be set to a subroutine reference so that you can
+ write your own serializing routine. YAML.pm passes you the code ref.
+ You pass back the serialization (as a string) and a format
+ indicator. The format indicator is a simple string like: 'deparse'
+ or 'bytecode'.
+
+ LoadCode
+ LoadCode is the opposite of DumpCode. It tells YAML if and how to
+ deserialize code references. When set to '1' or 'deparse' it will
+ use "eval()". Since this is potentially risky, only use this option
+ if you know where your YAML has been.
+
+ LoadCode can also be set to a subroutine reference so that you can
+ write your own deserializing routine. YAML.pm passes the
+ serialization (as a string) and a format indicator. You pass back
+ the code reference.
+
+ UseBlock
+ YAML.pm uses heuristics to guess which scalar style is best for a
+ given node. Sometimes you'll want all multiline scalars to use the
+ 'block' style. If so, set this option to 1.
+
+ NOTE: YAML's block style is akin to Perl's here-document.
+
+ UseFold
+ If you want to force YAML to use the 'folded' style for all
+ multiline scalars, then set $UseFold to 1.
+
+ NOTE: YAML's folded style is akin to the way HTML folds text, except
+ smarter.
+
+ UseAliases
+ YAML has an alias mechanism such that any given structure in memory
+ gets serialized once. Any other references to that structure are
+ serialized only as alias markers. This is how YAML can serialize
+ duplicate and recursive structures.
+
+ Sometimes, when you KNOW that your data is nonrecursive in nature,
+ you may want to serialize such that every node is expressed in full.
+ (ie as a copy of the original). Setting $YAML::UseAliases to 0 will
+ allow you to do this. This also may result in faster processing
+ because the lookup overhead is by bypassed.
+
+ THIS OPTION CAN BE DANGEROUS. *If* your data is recursive, this
+ option *will* cause Dump() to run in an endless loop, chewing up
+ your computers memory. You have been warned.
+
+ CompressSeries
+ Default is 1.
+
+ Compresses the formatting of arrays of hashes:
+
+ -
+ foo: bar
+ -
+ bar: foo
+
+ becomes:
+
+ - foo: bar
+ - bar: foo
+
+ Since this output is usually more desirable, this option is turned
+ on by default.
+
+YAML TERMINOLOGY
+ YAML is a full featured data serialization language, and thus has its
+ own terminology.
+
+ It is important to remember that although YAML is heavily influenced by
+ Perl and Python, it is a language in its own right, not merely just a
+ representation of Perl structures.
+
+ YAML has three constructs that are conspicuously similar to Perl's hash,
+ array, and scalar. They are called mapping, sequence, and string
+ respectively. By default, they do what you would expect. But each
+ instance may have an explicit or implicit tag (type) that makes it
+ behave differently. In this manner, YAML can be extended to represent
+ Perl's Glob or Python's tuple, or Ruby's Bigint.
+
+ stream
+ A YAML stream is the full sequence of unicode characters that a YAML
+ parser would read or a YAML emitter would write. A stream may
+ contain one or more YAML documents separated by YAML headers.
+
+ ---
+ a: mapping
+ foo: bar
+ ---
+ - a
+ - sequence
+
+ document
+ A YAML document is an independent data structure representation
+ within a stream. It is a top level node. Each document in a YAML
+ stream must begin with a YAML header line. Actually the header is
+ optional on the first document.
+
+ ---
+ This: top level mapping
+ is:
+ - a
+ - YAML
+ - document
+
+ header
+ A YAML header is a line that begins a YAML document. It consists of
+ three dashes, possibly followed by more info. Another purpose of the
+ header line is that it serves as a place to put top level tag and
+ anchor information.
+
+ --- !recursive-sequence &001
+ - * 001
+ - * 001
+
+ node
+ A YAML node is the representation of a particular data stucture.
+ Nodes may contain other nodes. (In Perl terms, nodes are like
+ scalars. Strings, arrayrefs and hashrefs. But this refers to the
+ serialized format, not the in-memory structure.)
+
+ tag This is similar to a type. It indicates how a particular YAML node
+ serialization should be transferred into or out of memory. For
+ instance a Foo::Bar object would use the tag 'perl/Foo::Bar':
+
+ - !perl/Foo::Bar
+ foo: 42
+ bar: stool
+
+ collection
+ A collection is the generic term for a YAML data grouping. YAML has
+ two types of collections: mappings and sequences. (Similar to hashes
+ and arrays)
+
+ mapping
+ A mapping is a YAML collection defined by unordered key/value pairs
+ with unique keys. By default YAML mappings are loaded into Perl
+ hashes.
+
+ a mapping:
+ foo: bar
+ two: times two is 4
+
+ sequence
+ A sequence is a YAML collection defined by an ordered list of
+ elements. By default YAML sequences are loaded into Perl arrays.
+
+ a sequence:
+ - one bourbon
+ - one scotch
+ - one beer
+
+ scalar
+ A scalar is a YAML node that is a single value. By default YAML
+ scalars are loaded into Perl scalars.
+
+ a scalar key: a scalar value
+
+ YAML has many styles for representing scalars. This is important
+ because varying data will have varying formatting requirements to
+ retain the optimum human readability.
+
+ plain scalar
+ A plain sclar is unquoted. All plain scalars are automatic
+ candidates for "implicit tagging". This means that their tag may be
+ determined automatically by examination. The typical uses for this
+ are plain alpha strings, integers, real numbers, dates, times and
+ currency.
+
+ - a plain string
+ - -42
+ - 3.1415
+ - 12:34
+ - 123 this is an error
+
+ single quoted scalar
+ This is similar to Perl's use of single quotes. It means no escaping
+ except for single quotes which are escaped by using two adjacent
+ single quotes.
+
+ - 'When I say ''\n'' I mean "backslash en"'
+
+ double quoted scalar
+ This is similar to Perl's use of double quotes. Character escaping
+ can be used.
+
+ - "This scalar\nhas two lines, and a bell -->\a"
+
+ folded scalar
+ This is a multiline scalar which begins on the next line. It is
+ indicated by a single right angle bracket. It is unescaped like the
+ single quoted scalar. Line folding is also performed.
+
+ - >
+ This is a multiline scalar which begins on
+ the next line. It is indicated by a single
+ carat. It is unescaped like the single
+ quoted scalar. Line folding is also
+ performed.
+
+ block scalar
+ This final multiline form is akin to Perl's here-document except
+ that (as in all YAML data) scope is indicated by indentation.
+ Therefore, no ending marker is required. The data is verbatim. No
+ line folding.
+
+ - |
+ QTY DESC PRICE TOTAL
+ --- ---- ----- -----
+ 1 Foo Fighters $19.95 $19.95
+ 2 Bar Belles $29.95 $59.90
+
+ parser
+ A YAML processor has four stages: parse, load, dump, emit.
+
+ A parser parses a YAML stream. YAML.pm's Load() function contains a
+ parser.
+
+ loader
+ The other half of the Load() function is a loader. This takes the
+ information from the parser and loads it into a Perl data structure.
+
+ dumper
+ The Dump() function consists of a dumper and an emitter. The dumper
+ walks through each Perl data structure and gives info to the
+ emitter.
+
+ emitter
+ The emitter takes info from the dumper and turns it into a YAML
+ stream.
+
+ NOTE: In YAML.pm the parser/loader and the dumper/emitter code are
+ currently very closely tied together. In the future they may be
+ broken into separate stages.
+
+ For more information please refer to the immensely helpful YAML
+ specification available at <http://www.yaml.org/spec/>.
+
+ysh - The YAML Shell
+ The YAML distribution ships with a script called 'ysh', the YAML shell.
+ ysh provides a simple, interactive way to play with YAML. If you type in
+ Perl code, it displays the result in YAML. If you type in YAML it turns
+ it into Perl code.
+
+ To run ysh, (assuming you installed it along with YAML.pm) simply type:
+
+ ysh [options]
+
+ Please read the "ysh" documentation for the full details. There are lots
+ of options.
+
+BUGS & DEFICIENCIES
+ If you find a bug in YAML, please try to recreate it in the YAML Shell
+ with logging turned on ('ysh -L'). When you have successfully reproduced
+ the bug, please mail the LOG file to the author (ingy@cpan.org).
+
+ WARNING: This is still *ALPHA* code. Well, most of this code has been
+ around for years...
+
+ BIGGER WARNING: YAML.pm has been slow in the making, but I am committed
+ to having top notch YAML tools in the Perl world. The YAML team is close
+ to finalizing the YAML 1.1 spec. This version of YAML.pm is based off of
+ a very old pre 1.0 spec. In actuality there isn't a ton of difference,
+ and this YAML.pm is still fairly useful. Things will get much better in
+ the future.
+
+RESOURCES
+ <http://lists.sourceforge.net/lists/listinfo/yaml-core> is the mailing
+ list. This is where the language is discussed and designed.
+
+ <http://www.yaml.org> is the official YAML website.
+
+ <http://www.yaml.org/spec/> is the YAML 1.0 specification.
+
+ <http://yaml.kwiki.org> is the official YAML wiki.
+
+SEE ALSO
+ See YAML::Syck. Fast!
+
+AUTHOR
+ Ingy döt Net <ingy@cpan.org>
+
+ is resonsible for YAML.pm.
+
+ The YAML serialization language is the result of years of collaboration
+ between Oren Ben-Kiki, Clark Evans and Ingy döt Net. Several others
+ have added help along the way.
+
+COPYRIGHT
+ Copyright (c) 2005, 2006. Ingy döt Net. All rights reserved. Copyright
+ (c) 2001, 2002, 2005. Brian Ingerson. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the same terms as Perl itself.
+
+ See <http://www.perl.com/perl/misc/Artistic.html>
+
--- /dev/null
+package YAML;
+use strict; use warnings;
+use YAML::Base;
+use base 'YAML::Base';
+use YAML::Node; # XXX This is a temp fix for Module::Build
+use 5.006001;
+our $VERSION = '0.62';
+our @EXPORT = qw'Dump Load';
+our @EXPORT_OK = qw'freeze thaw DumpFile LoadFile Bless Blessed';
+
+# XXX This VALUE nonsense needs to go.
+use constant VALUE => "\x07YAML\x07VALUE\x07";
+
+# YAML Object Properties
+field dumper_class => 'YAML::Dumper';
+field loader_class => 'YAML::Loader';
+field dumper_object =>
+ -init => '$self->init_action_object("dumper")';
+field loader_object =>
+ -init => '$self->init_action_object("loader")';
+
+sub Dump {
+ my $yaml = YAML->new;
+ $yaml->dumper_class($YAML::DumperClass)
+ if $YAML::DumperClass;
+ return $yaml->dumper_object->dump(@_);
+}
+
+sub Load {
+ my $yaml = YAML->new;
+ $yaml->loader_class($YAML::LoaderClass)
+ if $YAML::LoaderClass;
+ return $yaml->loader_object->load(@_);
+}
+
+{
+ no warnings 'once';
+ # freeze/thaw is the API for Storable string serialization. Some
+ # modules make use of serializing packages on if they use freeze/thaw.
+ *freeze = \ &Dump;
+ *thaw = \ &Load;
+}
+
+sub DumpFile {
+ my $OUT;
+ my $filename = shift;
+ if (ref $filename eq 'GLOB') {
+ $OUT = $filename;
+ }
+ else {
+ my $mode = '>';
+ if ($filename =~ /^\s*(>{1,2})\s*(.*)$/) {
+ ($mode, $filename) = ($1, $2);
+ }
+ open $OUT, $mode, $filename
+ or YAML::Base->die('YAML_DUMP_ERR_FILE_OUTPUT', $filename, $!);
+ }
+ local $/ = "\n"; # reset special to "sane"
+ print $OUT Dump(@_);
+}
+
+sub LoadFile {
+ my $IN;
+ my $filename = shift;
+ if (ref $filename eq 'GLOB') {
+ $IN = $filename;
+ }
+ else {
+ open $IN, $filename
+ or YAML::Base->die('YAML_LOAD_ERR_FILE_INPUT', $filename, $!);
+ }
+ return Load(do { local $/; <$IN> });
+}
+
+sub init_action_object {
+ my $self = shift;
+ my $object_class = (shift) . '_class';
+ my $module_name = $self->$object_class;
+ eval "require $module_name";
+ $self->die("Error in require $module_name - $@")
+ if $@ and "$@" !~ /Can't locate/;
+ my $object = $self->$object_class->new;
+ $object->set_global_options;
+ return $object;
+}
+
+my $global = {};
+sub Bless {
+ require YAML::Dumper::Base;
+ YAML::Dumper::Base::bless($global, @_)
+}
+sub Blessed {
+ require YAML::Dumper::Base;
+ YAML::Dumper::Base::blessed($global, @_)
+}
+sub global_object { $global }
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML - YAML Ain't Markup Language (tm)
+
+=head1 SYNOPSIS
+
+ use YAML;
+
+ # Load a YAML stream of 3 YAML documents into Perl data structures.
+ my ($hashref, $arrayref, $string) = Load(<<'...');
+ ---
+ name: ingy
+ age: old
+ weight: heavy
+ # I should comment that I also like pink, but don't tell anybody.
+ favorite colors:
+ - red
+ - green
+ - blue
+ ---
+ - Clark Evans
+ - Oren Ben-Kiki
+ - Ingy döt Net
+ --- >
+ You probably think YAML stands for "Yet Another Markup Language". It
+ ain't! YAML is really a data serialization language. But if you want
+ to think of it as a markup, that's OK with me. A lot of people try
+ to use XML as a serialization format.
+
+ "YAML" is catchy and fun to say. Try it. "YAML, YAML, YAML!!!"
+ ...
+
+ # Dump the Perl data structures back into YAML.
+ print Dump($string, $arrayref, $hashref);
+
+ # YAML::Dump is used the same way you'd use Data::Dumper::Dumper
+ use Data::Dumper;
+ print Dumper($string, $arrayref, $hashref);
+
+=head1 DESCRIPTION
+
+The YAML.pm module implements a YAML Loader and Dumper based on the YAML
+1.0 specification. L<http://www.yaml.org/spec/>
+
+YAML is a generic data serialization language that is optimized for
+human readability. It can be used to express the data structures of most
+modern programming languages. (Including Perl!!!)
+
+For information on the YAML syntax, please refer to the YAML
+specification.
+
+=head1 WHY YAML IS COOL
+
+=over 4
+
+=item YAML is readable for people.
+
+It makes clear sense out of complex data structures. You should find
+that YAML is an exceptional data dumping tool. Structure is shown
+through indentation, YAML supports recursive data, and hash keys are
+sorted by default. In addition, YAML supports several styles of scalar
+formatting for different types of data.
+
+=item YAML is editable.
+
+YAML was designed from the ground up to be an excellent syntax for
+configuration files. Almost all programs need configuration files, so
+why invent a new syntax for each one? And why subject users to the
+complexities of XML or native Perl code?
+
+=item YAML is multilingual.
+
+Yes, YAML supports Unicode. But I'm actually referring to programming
+languages. YAML was designed to meet the serialization needs of Perl,
+Python, Ruby, Tcl, PHP, Javascript and Java. It was also designed to be
+interoperable between those languages. That means YAML serializations
+produced by Perl can be processed by Python.
+
+=item YAML is taint safe.
+
+Using modules like Data::Dumper for serialization is fine as long as you
+can be sure that nobody can tamper with your data files or
+transmissions. That's because you need to use Perl's C<eval()> built-in
+to deserialize the data. Somebody could add a snippet of Perl to erase
+your files.
+
+YAML's parser does not need to eval anything.
+
+=item YAML is full featured.
+
+YAML can accurately serialize all of the common Perl data structures and
+deserialize them again without losing data relationships. Although it is
+not 100% perfect (no serializer is or can be perfect), it fares as well
+as the popular current modules: Data::Dumper, Storable, XML::Dumper and
+Data::Denter.
+
+YAML.pm also has the ability to handle code (subroutine) references and
+typeglobs. (Still experimental) These features are not found in Perl's
+other serialization modules.
+
+=item YAML is extensible.
+
+The YAML language has been designed to be flexible enough to solve it's
+own problems. The markup itself has 3 basic construct which resemble
+Perl's hash, array and scalar. By default, these map to their Perl
+equivalents. But each YAML node also supports a tagging mechanism (type
+system) which can cause that node to be interpreted in a completely
+different manner. That's how YAML can support object serialization and
+oddball structures like Perl's typeglob.
+
+=back
+
+=head1 YAML IMPLEMENTATIONS IN PERL
+
+This module, YAML.pm, is really just the interface module for YAML
+modules written in Perl. The basic interface for YAML consists of two
+functions: C<Dump> and C<Load>. The real work is done by the modules
+YAML::Dumper and YAML::Loader.
+
+Different YAML module distributions can be created by subclassing
+YAML.pm and YAML::Loader and YAML::Dumper. For example, YAML-Simple
+consists of YAML::Simple YAML::Dumper::Simple and YAML::Loader::Simple.
+
+Why would there be more than one implementation of YAML? Well, despite
+YAML's offering of being a simple data format, YAML is actually very
+deep and complex. Implementing the entirety of the YAML specification is
+a daunting task.
+
+For this reason I am currently working on 3 different YAML implementations.
+
+=over
+
+=item YAML
+
+The main YAML distribution will keeping evolving to support the entire
+YAML specification in pure Perl. This may not be the fastest or most
+stable module though. Currently, YAML.pm has lots of known bugs. It is
+mostly a great tool for dumping Perl data structures to a readable form.
+
+=item YAML::Lite
+
+The point of YAML::Lite is to strip YAML down to the 90% that people
+use most and offer that in a small, fast, stable, pure Perl form.
+YAML::Lite will simply die when it is asked to do something it can't.
+
+=item YAML::Syck
+
+C<libsyck> is the C based YAML processing library used by the Ruby
+programming language (and also Python, PHP and Pugs). YAML::Syck is the
+Perl binding to C<libsyck>. It should be very fast, but may have
+problems of its own. It will also require C compilation.
+
+NOTE: Audrey Tang has actually completed this module and it works great
+ and is 10 times faster than YAML.pm.
+
+=back
+
+In the future, there will likely be even more YAML modules. Remember,
+people other than Ingy are allowed to write YAML modules!
+
+=head1 FUNCTIONAL USAGE
+
+YAML is completely OO under the hood. Still it exports a few useful top
+level functions so that it is dead simple to use. These functions just
+do the OO stuff for you. If you want direct access to the OO API see the
+documentation for YAML::Dumper and YAML::Loader.
+
+=head2 Exported Functions
+
+The following functions are exported by YAML.pm by default. The reason
+they are exported is so that YAML works much like Data::Dumper. If you
+don't want functions to be imported, just use YAML with an empty
+import list:
+
+ use YAML ();
+
+=over 4
+
+=item Dump(list-of-Perl-data-structures)
+
+Turn Perl data into YAML. This function works very much like
+Data::Dumper::Dumper(). It takes a list of Perl data strucures and
+dumps them into a serialized form. It returns a string containing the
+YAML stream. The structures can be references or plain scalars.
+
+=item Load(string-containing-a-YAML-stream)
+
+Turn YAML into Perl data. This is the opposite of Dump. Just like
+Storable's thaw() function or the eval() function in relation to
+Data::Dumper. It parses a string containing a valid YAML stream into a
+list of Perl data structures.
+
+=back
+
+=head2 Exportable Functions
+
+These functions are not exported by default but you can request them in
+an import list like this:
+
+ use YAML qw'freeze thaw Bless';
+
+=over 4
+
+=item freeze() and thaw()
+
+Aliases to Dump() and Load() for Storable fans. This will also allow
+YAML.pm to be plugged directly into modules like POE.pm, that use the
+freeze/thaw API for internal serialization.
+
+=item DumpFile(filepath, list)
+
+Writes the YAML stream to a file instead of just returning a string.
+
+=item LoadFile(filepath)
+
+Reads the YAML stream from a file instead of a string.
+
+=item Bless(perl-node, [yaml-node | class-name])
+
+Associate a normal Perl node, with a yaml node. A yaml node is an object
+tied to the YAML::Node class. The second argument is either a yaml node
+that you've already created or a class (package) name that supports a
+yaml_dump() function. A yaml_dump() function should take a perl node and
+return a yaml node. If no second argument is provided, Bless will create
+a yaml node. This node is not returned, but can be retrieved with the
+Blessed() function.
+
+Here's an example of how to use Bless. Say you have a hash containing
+three keys, but you only want to dump two of them. Furthermore the keys
+must be dumped in a certain order. Here's how you do that:
+
+ use YAML qw(Dump Bless);
+ $hash = {apple => 'good', banana => 'bad', cauliflower => 'ugly'};
+ print Dump $hash;
+ Bless($hash)->keys(['banana', 'apple']);
+ print Dump $hash;
+
+produces:
+
+ ---
+ apple: good
+ banana: bad
+ cauliflower: ugly
+ ---
+ banana: bad
+ apple: good
+
+Bless returns the tied part of a yaml-node, so that you can call the
+YAML::Node methods. This is the same thing that YAML::Node::ynode()
+returns. So another way to do the above example is:
+
+ use YAML qw(Dump Bless);
+ use YAML::Node;
+ $hash = {apple => 'good', banana => 'bad', cauliflower => 'ugly'};
+ print Dump $hash;
+ Bless($hash);
+ $ynode = ynode(Blessed($hash));
+ $ynode->keys(['banana', 'apple']);
+ print Dump $hash;
+
+Note that Blessing a Perl data structure does not change it anyway. The
+extra information is stored separately and looked up by the Blessed
+node's memory address.
+
+=item Blessed(perl-node)
+
+Returns the yaml node that a particular perl node is associated with
+(see above). Returns undef if the node is not (YAML) Blessed.
+
+=back
+
+=head1 GLOBAL OPTIONS
+
+YAML options are set using a group of global variables in the YAML
+namespace. This is similar to how Data::Dumper works.
+
+For example, to change the indentation width, do something like:
+
+ local $YAML::Indent = 3;
+
+The current options are:
+
+=over 4
+
+=item DumperClass
+
+You can override which module/class YAML uses for Dumping data.
+
+=item LoaderClass
+
+You can override which module/class YAML uses for Loading data.
+
+=item Indent
+
+This is the number of space characters to use for each indentation level
+when doing a Dump(). The default is 2.
+
+By the way, YAML can use any number of characters for indentation at any
+level. So if you are editing YAML by hand feel free to do it anyway that
+looks pleasing to you; just be consistent for a given level.
+
+=item SortKeys
+
+Default is 1. (true)
+
+Tells YAML.pm whether or not to sort hash keys when storing a document.
+
+YAML::Node objects can have their own sort order, which is usually what
+you want. To override the YAML::Node order and sort the keys anyway, set
+SortKeys to 2.
+
+=item Stringify
+
+Default is 0. (false)
+
+Objects with string overloading should honor the overloading and dump the
+stringification of themselves, rather than the actual object's guts.
+
+=item UseHeader
+
+Default is 1. (true)
+
+This tells YAML.pm whether to use a separator string for a Dump
+operation. This only applies to the first document in a stream.
+Subsequent documents must have a YAML header by definition.
+
+=item UseVersion
+
+Default is 0. (false)
+
+Tells YAML.pm whether to include the YAML version on the
+separator/header.
+
+ --- %YAML:1.0
+
+=item AnchorPrefix
+
+Default is ''.
+
+Anchor names are normally numeric. YAML.pm simply starts with '1' and
+increases by one for each new anchor. This option allows you to specify a
+string to be prepended to each anchor number.
+
+=item UseCode
+
+Setting the UseCode option is a shortcut to set both the DumpCode and
+LoadCode options at once. Setting UseCode to '1' tells YAML.pm to dump
+Perl code references as Perl (using B::Deparse) and to load them back
+into memory using eval(). The reason this has to be an option is that
+using eval() to parse untrusted code is, well, untrustworthy.
+
+=item DumpCode
+
+Determines if and how YAML.pm should serialize Perl code references. By
+default YAML.pm will dump code references as dummy placeholders (much
+like Data::Dumper). If DumpCode is set to '1' or 'deparse', code
+references will be dumped as actual Perl code.
+
+DumpCode can also be set to a subroutine reference so that you can
+write your own serializing routine. YAML.pm passes you the code ref. You
+pass back the serialization (as a string) and a format indicator. The
+format indicator is a simple string like: 'deparse' or 'bytecode'.
+
+=item LoadCode
+
+LoadCode is the opposite of DumpCode. It tells YAML if and how to
+deserialize code references. When set to '1' or 'deparse' it will use
+C<eval()>. Since this is potentially risky, only use this option if you
+know where your YAML has been.
+
+LoadCode can also be set to a subroutine reference so that you can write
+your own deserializing routine. YAML.pm passes the serialization (as a
+string) and a format indicator. You pass back the code reference.
+
+=item UseBlock
+
+YAML.pm uses heuristics to guess which scalar style is best for a given
+node. Sometimes you'll want all multiline scalars to use the 'block'
+style. If so, set this option to 1.
+
+NOTE: YAML's block style is akin to Perl's here-document.
+
+=item UseFold
+
+If you want to force YAML to use the 'folded' style for all multiline
+scalars, then set $UseFold to 1.
+
+NOTE: YAML's folded style is akin to the way HTML folds text,
+ except smarter.
+
+=item UseAliases
+
+YAML has an alias mechanism such that any given structure in memory gets
+serialized once. Any other references to that structure are serialized
+only as alias markers. This is how YAML can serialize duplicate and
+recursive structures.
+
+Sometimes, when you KNOW that your data is nonrecursive in nature, you
+may want to serialize such that every node is expressed in full. (ie as
+a copy of the original). Setting $YAML::UseAliases to 0 will allow you
+to do this. This also may result in faster processing because the lookup
+overhead is by bypassed.
+
+THIS OPTION CAN BE DANGEROUS. *If* your data is recursive, this option
+*will* cause Dump() to run in an endless loop, chewing up your computers
+memory. You have been warned.
+
+=item CompressSeries
+
+Default is 1.
+
+Compresses the formatting of arrays of hashes:
+
+ -
+ foo: bar
+ -
+ bar: foo
+
+becomes:
+
+ - foo: bar
+ - bar: foo
+
+Since this output is usually more desirable, this option is turned on by
+default.
+
+=back
+
+=head1 YAML TERMINOLOGY
+
+YAML is a full featured data serialization language, and thus has its
+own terminology.
+
+It is important to remember that although YAML is heavily influenced by
+Perl and Python, it is a language in its own right, not merely just a
+representation of Perl structures.
+
+YAML has three constructs that are conspicuously similar to Perl's hash,
+array, and scalar. They are called mapping, sequence, and string
+respectively. By default, they do what you would expect. But each
+instance may have an explicit or implicit tag (type) that makes it
+behave differently. In this manner, YAML can be extended to represent
+Perl's Glob or Python's tuple, or Ruby's Bigint.
+
+=over 4
+
+=item stream
+
+A YAML stream is the full sequence of unicode characters that a YAML
+parser would read or a YAML emitter would write. A stream may contain
+one or more YAML documents separated by YAML headers.
+
+ ---
+ a: mapping
+ foo: bar
+ ---
+ - a
+ - sequence
+
+=item document
+
+A YAML document is an independent data structure representation within a
+stream. It is a top level node. Each document in a YAML stream must
+begin with a YAML header line. Actually the header is optional on the
+first document.
+
+ ---
+ This: top level mapping
+ is:
+ - a
+ - YAML
+ - document
+
+=item header
+
+A YAML header is a line that begins a YAML document. It consists of
+three dashes, possibly followed by more info. Another purpose of the
+header line is that it serves as a place to put top level tag and anchor
+information.
+
+ --- !recursive-sequence &001
+ - * 001
+ - * 001
+
+=item node
+
+A YAML node is the representation of a particular data stucture. Nodes
+may contain other nodes. (In Perl terms, nodes are like scalars.
+Strings, arrayrefs and hashrefs. But this refers to the serialized
+format, not the in-memory structure.)
+
+=item tag
+
+This is similar to a type. It indicates how a particular YAML node
+serialization should be transferred into or out of memory. For instance
+a Foo::Bar object would use the tag 'perl/Foo::Bar':
+
+ - !perl/Foo::Bar
+ foo: 42
+ bar: stool
+
+=item collection
+
+A collection is the generic term for a YAML data grouping. YAML has two
+types of collections: mappings and sequences. (Similar to hashes and arrays)
+
+=item mapping
+
+A mapping is a YAML collection defined by unordered key/value pairs with
+unique keys. By default YAML mappings are loaded into Perl hashes.
+
+ a mapping:
+ foo: bar
+ two: times two is 4
+
+=item sequence
+
+A sequence is a YAML collection defined by an ordered list of elements. By
+default YAML sequences are loaded into Perl arrays.
+
+ a sequence:
+ - one bourbon
+ - one scotch
+ - one beer
+
+=item scalar
+
+A scalar is a YAML node that is a single value. By default YAML scalars
+are loaded into Perl scalars.
+
+ a scalar key: a scalar value
+
+YAML has many styles for representing scalars. This is important because
+varying data will have varying formatting requirements to retain the
+optimum human readability.
+
+=item plain scalar
+
+A plain sclar is unquoted. All plain scalars are automatic candidates
+for "implicit tagging". This means that their tag may be determined
+automatically by examination. The typical uses for this are plain alpha
+strings, integers, real numbers, dates, times and currency.
+
+ - a plain string
+ - -42
+ - 3.1415
+ - 12:34
+ - 123 this is an error
+
+=item single quoted scalar
+
+This is similar to Perl's use of single quotes. It means no escaping
+except for single quotes which are escaped by using two adjacent
+single quotes.
+
+ - 'When I say ''\n'' I mean "backslash en"'
+
+=item double quoted scalar
+
+This is similar to Perl's use of double quotes. Character escaping can
+be used.
+
+ - "This scalar\nhas two lines, and a bell -->\a"
+
+=item folded scalar
+
+This is a multiline scalar which begins on the next line. It is
+indicated by a single right angle bracket. It is unescaped like the
+single quoted scalar. Line folding is also performed.
+
+ - >
+ This is a multiline scalar which begins on
+ the next line. It is indicated by a single
+ carat. It is unescaped like the single
+ quoted scalar. Line folding is also
+ performed.
+
+=item block scalar
+
+This final multiline form is akin to Perl's here-document except that
+(as in all YAML data) scope is indicated by indentation. Therefore, no
+ending marker is required. The data is verbatim. No line folding.
+
+ - |
+ QTY DESC PRICE TOTAL
+ --- ---- ----- -----
+ 1 Foo Fighters $19.95 $19.95
+ 2 Bar Belles $29.95 $59.90
+
+=item parser
+
+A YAML processor has four stages: parse, load, dump, emit.
+
+A parser parses a YAML stream. YAML.pm's Load() function contains a
+parser.
+
+=item loader
+
+The other half of the Load() function is a loader. This takes the
+information from the parser and loads it into a Perl data structure.
+
+=item dumper
+
+The Dump() function consists of a dumper and an emitter. The dumper
+walks through each Perl data structure and gives info to the emitter.
+
+=item emitter
+
+The emitter takes info from the dumper and turns it into a YAML stream.
+
+NOTE:
+In YAML.pm the parser/loader and the dumper/emitter code are currently
+very closely tied together. In the future they may be broken into
+separate stages.
+
+=back
+
+For more information please refer to the immensely helpful YAML
+specification available at L<http://www.yaml.org/spec/>.
+
+=head1 ysh - The YAML Shell
+
+The YAML distribution ships with a script called 'ysh', the YAML shell.
+ysh provides a simple, interactive way to play with YAML. If you type in
+Perl code, it displays the result in YAML. If you type in YAML it turns
+it into Perl code.
+
+To run ysh, (assuming you installed it along with YAML.pm) simply type:
+
+ ysh [options]
+
+Please read the C<ysh> documentation for the full details. There are
+lots of options.
+
+=head1 BUGS & DEFICIENCIES
+
+If you find a bug in YAML, please try to recreate it in the YAML Shell
+with logging turned on ('ysh -L'). When you have successfully reproduced
+the bug, please mail the LOG file to the author (ingy@cpan.org).
+
+WARNING: This is still *ALPHA* code. Well, most of this code has been
+around for years...
+
+BIGGER WARNING: YAML.pm has been slow in the making, but I am committed
+to having top notch YAML tools in the Perl world. The YAML team is close
+to finalizing the YAML 1.1 spec. This version of YAML.pm is based off of
+a very old pre 1.0 spec. In actuality there isn't a ton of difference,
+and this YAML.pm is still fairly useful. Things will get much better in
+the future.
+
+=head1 RESOURCES
+
+L<http://lists.sourceforge.net/lists/listinfo/yaml-core> is the mailing
+list. This is where the language is discussed and designed.
+
+L<http://www.yaml.org> is the official YAML website.
+
+L<http://www.yaml.org/spec/> is the YAML 1.0 specification.
+
+L<http://yaml.kwiki.org> is the official YAML wiki.
+
+=head1 SEE ALSO
+
+See YAML::Syck. Fast!
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+is resonsible for YAML.pm.
+
+The YAML serialization language is the result of years of collaboration
+between Oren Ben-Kiki, Clark Evans and Ingy döt Net. Several others
+have added help along the way.
+
+=head1 COPYRIGHT
+
+Copyright (c) 2005, 2006. Ingy döt Net. All rights reserved.
+Copyright (c) 2001, 2002, 2005. Brian Ingerson. All rights reserved.
+
+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
--- /dev/null
+package YAML::Base;
+use strict; use warnings;
+use base 'Exporter';
+
+our @EXPORT = qw(field XXX);
+
+sub new {
+ my $class = shift;
+ $class = ref($class) || $class;
+ my $self = bless {}, $class;
+ while (@_) {
+ my $method = shift;
+ $self->$method(shift);
+ }
+ return $self;
+}
+
+# Use lexical subs to reduce pollution of private methods by base class.
+my ($_new_error, $_info, $_scalar_info, $parse_arguments, $default_as_code);
+
+sub XXX {
+ require Data::Dumper;
+ CORE::die(Data::Dumper::Dumper(@_));
+}
+
+my %code = (
+ sub_start =>
+ "sub {\n",
+ set_default =>
+ " \$_[0]->{%s} = %s\n unless exists \$_[0]->{%s};\n",
+ init =>
+ " return \$_[0]->{%s} = do { my \$self = \$_[0]; %s }\n" .
+ " unless \$#_ > 0 or defined \$_[0]->{%s};\n",
+ return_if_get =>
+ " return \$_[0]->{%s} unless \$#_ > 0;\n",
+ set =>
+ " \$_[0]->{%s} = \$_[1];\n",
+ sub_end =>
+ " return \$_[0]->{%s};\n}\n",
+);
+
+sub field {
+ my $package = caller;
+ my ($args, @values) = &$parse_arguments(
+ [ qw(-package -init) ],
+ @_,
+ );
+ my ($field, $default) = @values;
+ $package = $args->{-package} if defined $args->{-package};
+ return if defined &{"${package}::$field"};
+ my $default_string =
+ ( ref($default) eq 'ARRAY' and not @$default )
+ ? '[]'
+ : (ref($default) eq 'HASH' and not keys %$default )
+ ? '{}'
+ : &$default_as_code($default);
+
+ my $code = $code{sub_start};
+ if ($args->{-init}) {
+ my $fragment = $code{init};
+ $code .= sprintf $fragment, $field, $args->{-init}, ($field) x 4;
+ }
+ $code .= sprintf $code{set_default}, $field, $default_string, $field
+ if defined $default;
+ $code .= sprintf $code{return_if_get}, $field;
+ $code .= sprintf $code{set}, $field;
+ $code .= sprintf $code{sub_end}, $field;
+
+ my $sub = eval $code;
+ die $@ if $@;
+ no strict 'refs';
+ *{"${package}::$field"} = $sub;
+ return $code if defined wantarray;
+}
+
+sub die {
+ my $self = shift;
+ my $error = $self->$_new_error(@_);
+ $error->type('Error');
+ Carp::croak($error->format_message);
+}
+
+sub warn {
+ my $self = shift;
+ return unless $^W;
+ my $error = $self->$_new_error(@_);
+ $error->type('Warning');
+ Carp::cluck($error->format_message);
+}
+
+# This code needs to be refactored to be simpler and more precise, and no,
+# Scalar::Util doesn't DWIM.
+#
+# Can't handle:
+# * blessed regexp
+sub node_info {
+ my $self = shift;
+ my $stringify = $_[1] || 0;
+ my ($class, $type, $id) =
+ ref($_[0])
+ ? $stringify
+ ? &$_info("$_[0]")
+ : do {
+ require overload;
+ my @info = &$_info(overload::StrVal($_[0]));
+ if (ref($_[0]) eq 'Regexp') {
+ @info[0, 1] = (undef, 'REGEXP');
+ }
+ @info;
+ }
+ : &$_scalar_info($_[0]);
+ ($class, $type, $id) = &$_scalar_info("$_[0]")
+ unless $id;
+ return wantarray ? ($class, $type, $id) : $id;
+}
+
+#-------------------------------------------------------------------------------
+$_info = sub {
+ return (($_[0]) =~ qr{^(?:(.*)\=)?([^=]*)\(([^\(]*)\)$}o);
+};
+
+$_scalar_info = sub {
+ my $id = 'undef';
+ if (defined $_[0]) {
+ \$_[0] =~ /\((\w+)\)$/o or CORE::die();
+ $id = "$1-S";
+ }
+ return (undef, undef, $id);
+};
+
+$_new_error = sub {
+ require Carp;
+ my $self = shift;
+ require YAML::Error;
+
+ my $code = shift || 'unknown error';
+ my $error = YAML::Error->new(code => $code);
+ $error->line($self->line) if $self->can('line');
+ $error->document($self->document) if $self->can('document');
+ $error->arguments([@_]);
+ return $error;
+};
+
+$parse_arguments = sub {
+ my $paired_arguments = shift || [];
+ my ($args, @values) = ({}, ());
+ my %pairs = map { ($_, 1) } @$paired_arguments;
+ while (@_) {
+ my $elem = shift;
+ if (defined $elem and defined $pairs{$elem} and @_) {
+ $args->{$elem} = shift;
+ }
+ else {
+ push @values, $elem;
+ }
+ }
+ return wantarray ? ($args, @values) : $args;
+};
+
+$default_as_code = sub {
+ no warnings 'once';
+ require Data::Dumper;
+ local $Data::Dumper::Sortkeys = 1;
+ my $code = Data::Dumper::Dumper(shift);
+ $code =~ s/^\$VAR1 = //;
+ $code =~ s/;$//;
+ return $code;
+};
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Base - Base class for YAML classes
+
+=head1 SYNOPSIS
+
+ package YAML::Something;
+ use YAML::Base -base;
+
+=head1 DESCRIPTION
+
+YAML::Base is the parent of all YAML classes.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
--- /dev/null
+package YAML::Dumper;
+use strict; use warnings;
+use YAML::Base;
+use base 'YAML::Dumper::Base';
+
+use YAML::Node;
+use YAML::Types;
+
+# Context constants
+use constant KEY => 3;
+use constant BLESSED => 4;
+use constant FROMARRAY => 5;
+use constant VALUE => "\x07YAML\x07VALUE\x07";
+
+# Common YAML character sets
+my $ESCAPE_CHAR = '[\\x00-\\x08\\x0b-\\x0d\\x0e-\\x1f]';
+my $LIT_CHAR = '|';
+
+#==============================================================================
+# OO version of Dump. YAML->new->dump($foo);
+sub dump {
+ my $self = shift;
+ $self->stream('');
+ $self->document(0);
+ for my $document (@_) {
+ $self->{document}++;
+ $self->transferred({});
+ $self->id_refcnt({});
+ $self->id_anchor({});
+ $self->anchor(1);
+ $self->level(0);
+ $self->offset->[0] = 0 - $self->indent_width;
+ $self->_prewalk($document);
+ $self->_emit_header($document);
+ $self->_emit_node($document);
+ }
+ return $self->stream;
+}
+
+# Every YAML document in the stream must begin with a YAML header, unless
+# there is only a single document and the user requests "no header".
+sub _emit_header {
+ my $self = shift;
+ my ($node) = @_;
+ if (not $self->use_header and
+ $self->document == 1
+ ) {
+ $self->die('YAML_DUMP_ERR_NO_HEADER')
+ unless ref($node) =~ /^(HASH|ARRAY)$/;
+ $self->die('YAML_DUMP_ERR_NO_HEADER')
+ if ref($node) eq 'HASH' and keys(%$node) == 0;
+ $self->die('YAML_DUMP_ERR_NO_HEADER')
+ if ref($node) eq 'ARRAY' and @$node == 0;
+ # XXX Also croak if aliased, blessed, or ynode
+ $self->headless(1);
+ return;
+ }
+ $self->{stream} .= '---';
+# XXX Consider switching to 1.1 style
+ if ($self->use_version) {
+# $self->{stream} .= " #YAML:1.0";
+ }
+}
+
+# Walk the tree to be dumped and keep track of its reference counts.
+# This function is where the Dumper does all its work. All type
+# transfers happen here.
+sub _prewalk {
+ my $self = shift;
+ my $stringify = $self->stringify;
+ my ($class, $type, $node_id) = $self->node_info(\$_[0], $stringify);
+
+ # Handle typeglobs
+ if ($type eq 'GLOB') {
+ $self->transferred->{$node_id} =
+ YAML::Type::glob->yaml_dump($_[0]);
+ $self->_prewalk($self->transferred->{$node_id});
+ return;
+ }
+
+ # Handle regexps
+ if (ref($_[0]) eq 'Regexp') {
+ $self->transferred->{$node_id} =
+ YAML::Type::regexp->yaml_dump($_[0], $class, $self);
+ return;
+ }
+
+ # Handle Purity for scalars.
+ # XXX can't find a use case yet. Might be YAGNI.
+ if (not ref $_[0]) {
+ $self->{id_refcnt}{$node_id}++ if $self->purity;
+ return;
+ }
+
+ # Make a copy of original
+ my $value = $_[0];
+ ($class, $type, $node_id) = $self->node_info($value, $stringify);
+
+ # Must be a stringified object.
+ return if (ref($value) and not $type);
+
+ # Look for things already transferred.
+ if ($self->transferred->{$node_id}) {
+ (undef, undef, $node_id) = (ref $self->transferred->{$node_id})
+ ? $self->node_info($self->transferred->{$node_id}, $stringify)
+ : $self->node_info(\ $self->transferred->{$node_id}, $stringify);
+ $self->{id_refcnt}{$node_id}++;
+ return;
+ }
+
+ # Handle code refs
+ if ($type eq 'CODE') {
+ $self->transferred->{$node_id} = 'placeholder';
+ YAML::Type::code->yaml_dump(
+ $self->dump_code,
+ $_[0],
+ $self->transferred->{$node_id}
+ );
+ ($class, $type, $node_id) =
+ $self->node_info(\ $self->transferred->{$node_id}, $stringify);
+ $self->{id_refcnt}{$node_id}++;
+ return;
+ }
+
+ # Handle blessed things
+ if (defined $class) {
+ if ($value->can('yaml_dump')) {
+ $value = $value->yaml_dump;
+ }
+ elsif ($type eq 'SCALAR') {
+ $self->transferred->{$node_id} = 'placeholder';
+ YAML::Type::blessed->yaml_dump
+ ($_[0], $self->transferred->{$node_id});
+ ($class, $type, $node_id) =
+ $self->node_info(\ $self->transferred->{$node_id}, $stringify);
+ $self->{id_refcnt}{$node_id}++;
+ return;
+ }
+ else {
+ $value = YAML::Type::blessed->yaml_dump($value);
+ }
+ $self->transferred->{$node_id} = $value;
+ (undef, $type, $node_id) = $self->node_info($value, $stringify);
+ }
+
+ # Handle YAML Blessed things
+ if (defined YAML->global_object()->{blessed_map}{$node_id}) {
+ $value = YAML->global_object()->{blessed_map}{$node_id};
+ $self->transferred->{$node_id} = $value;
+ ($class, $type, $node_id) = $self->node_info($value, $stringify);
+ $self->_prewalk($value);
+ return;
+ }
+
+ # Handle hard refs
+ if ($type eq 'REF' or $type eq 'SCALAR') {
+ $value = YAML::Type::ref->yaml_dump($value);
+ $self->transferred->{$node_id} = $value;
+ (undef, $type, $node_id) = $self->node_info($value, $stringify);
+ }
+
+ # Handle ref-to-glob's
+ elsif ($type eq 'GLOB') {
+ my $ref_ynode = $self->transferred->{$node_id} =
+ YAML::Type::ref->yaml_dump($value);
+
+ my $glob_ynode = $ref_ynode->{&VALUE} =
+ YAML::Type::glob->yaml_dump($$value);
+
+ (undef, undef, $node_id) = $self->node_info($glob_ynode, $stringify);
+ $self->transferred->{$node_id} = $glob_ynode;
+ $self->_prewalk($glob_ynode);
+ return;
+ }
+
+ # Increment ref count for node
+ return if ++($self->{id_refcnt}{$node_id}) > 1;
+
+ # Keep on walking
+ if ($type eq 'HASH') {
+ $self->_prewalk($value->{$_})
+ for keys %{$value};
+ return;
+ }
+ elsif ($type eq 'ARRAY') {
+ $self->_prewalk($_)
+ for @{$value};
+ return;
+ }
+
+ # Unknown type. Need to know about it.
+ $self->warn(<<"...");
+YAML::Dumper can't handle dumping this type of data.
+Please report this to the author.
+
+id: $node_id
+type: $type
+class: $class
+value: $value
+
+...
+
+ return;
+}
+
+# Every data element and sub data element is a node.
+# Everything emitted goes through this function.
+sub _emit_node {
+ my $self = shift;
+ my ($type, $node_id);
+ my $ref = ref($_[0]);
+ if ($ref and $ref ne 'Regexp') {
+ (undef, $type, $node_id) = $self->node_info($_[0], $self->stringify);
+ }
+ else {
+ $type = $ref || 'SCALAR';
+ (undef, undef, $node_id) = $self->node_info(\$_[0], $self->stringify);
+ }
+
+ my ($ynode, $tag) = ('') x 2;
+ my ($value, $context) = (@_, 0);
+
+ if (defined $self->transferred->{$node_id}) {
+ $value = $self->transferred->{$node_id};
+ $ynode = ynode($value);
+ if (ref $value) {
+ $tag = defined $ynode ? $ynode->tag->short : '';
+ (undef, $type, $node_id) =
+ $self->node_info($value, $self->stringify);
+ }
+ else {
+ $ynode = ynode($self->transferred->{$node_id});
+ $tag = defined $ynode ? $ynode->tag->short : '';
+ $type = 'SCALAR';
+ (undef, undef, $node_id) =
+ $self->node_info(
+ \ $self->transferred->{$node_id},
+ $self->stringify
+ );
+ }
+ }
+ elsif ($ynode = ynode($value)) {
+ $tag = $ynode->tag->short;
+ }
+
+ if ($self->use_aliases) {
+ $self->{id_refcnt}{$node_id} ||= 0;
+ if ($self->{id_refcnt}{$node_id} > 1) {
+ if (defined $self->{id_anchor}{$node_id}) {
+ $self->{stream} .= ' *' . $self->{id_anchor}{$node_id} . "\n";
+ return;
+ }
+ my $anchor = $self->anchor_prefix . $self->{anchor}++;
+ $self->{stream} .= ' &' . $anchor;
+ $self->{id_anchor}{$node_id} = $anchor;
+ }
+ }
+
+ return $self->_emit_str("$value") # Stringified object
+ if ref($value) and not $type;
+ return $self->_emit_scalar($value, $tag)
+ if $type eq 'SCALAR' and $tag;
+ return $self->_emit_str($value)
+ if $type eq 'SCALAR';
+ return $self->_emit_mapping($value, $tag, $node_id, $context)
+ if $type eq 'HASH';
+ return $self->_emit_sequence($value, $tag)
+ if $type eq 'ARRAY';
+ $self->warn('YAML_DUMP_WARN_BAD_NODE_TYPE', $type);
+ return $self->_emit_str("$value");
+}
+
+# A YAML mapping is akin to a Perl hash.
+sub _emit_mapping {
+ my $self = shift;
+ my ($value, $tag, $node_id, $context) = @_;
+ $self->{stream} .= " !$tag" if $tag;
+
+ # Sometimes 'keys' fails. Like on a bad tie implementation.
+ my $empty_hash = not(eval {keys %$value});
+ $self->warn('YAML_EMIT_WARN_KEYS', $@) if $@;
+ return ($self->{stream} .= " {}\n") if $empty_hash;
+
+ # If CompressSeries is on (default) and legal is this context, then
+ # use it and make the indent level be 2 for this node.
+ if ($context == FROMARRAY and
+ $self->compress_series and
+ not (defined $self->{id_anchor}{$node_id} or $tag or $empty_hash)
+ ) {
+ $self->{stream} .= ' ';
+ $self->offset->[$self->level+1] = $self->offset->[$self->level] + 2;
+ }
+ else {
+ $context = 0;
+ $self->{stream} .= "\n"
+ unless $self->headless && not($self->headless(0));
+ $self->offset->[$self->level+1] =
+ $self->offset->[$self->level] + $self->indent_width;
+ }
+
+ $self->{level}++;
+ my @keys;
+ if ($self->sort_keys == 1) {
+ if (ynode($value)) {
+ @keys = keys %$value;
+ }
+ else {
+ @keys = sort keys %$value;
+ }
+ }
+ elsif ($self->sort_keys == 2) {
+ @keys = sort keys %$value;
+ }
+ # XXX This is hackish but sometimes handy. Not sure whether to leave it in.
+ elsif (ref($self->sort_keys) eq 'ARRAY') {
+ my $i = 1;
+ my %order = map { ($_, $i++) } @{$self->sort_keys};
+ @keys = sort {
+ (defined $order{$a} and defined $order{$b})
+ ? ($order{$a} <=> $order{$b})
+ : ($a cmp $b);
+ } keys %$value;
+ }
+ else {
+ @keys = keys %$value;
+ }
+ # Force the YAML::VALUE ('=') key to sort last.
+ if (exists $value->{&VALUE}) {
+ for (my $i = 0; $i < @keys; $i++) {
+ if ($keys[$i] eq &VALUE) {
+ splice(@keys, $i, 1);
+ push @keys, &VALUE;
+ last;
+ }
+ }
+ }
+
+ for my $key (@keys) {
+ $self->_emit_key($key, $context);
+ $context = 0;
+ $self->{stream} .= ':';
+ $self->_emit_node($value->{$key});
+ }
+ $self->{level}--;
+}
+
+# A YAML series is akin to a Perl array.
+sub _emit_sequence {
+ my $self = shift;
+ my ($value, $tag) = @_;
+ $self->{stream} .= " !$tag" if $tag;
+
+ return ($self->{stream} .= " []\n") if @$value == 0;
+
+ $self->{stream} .= "\n"
+ unless $self->headless && not($self->headless(0));
+
+ # XXX Really crufty feature. Better implemented by ynodes.
+ if ($self->inline_series and
+ @$value <= $self->inline_series and
+ not (scalar grep {ref or /\n/} @$value)
+ ) {
+ $self->{stream} =~ s/\n\Z/ /;
+ $self->{stream} .= '[';
+ for (my $i = 0; $i < @$value; $i++) {
+ $self->_emit_str($value->[$i], KEY);
+ last if $i == $#{$value};
+ $self->{stream} .= ', ';
+ }
+ $self->{stream} .= "]\n";
+ return;
+ }
+
+ $self->offset->[$self->level + 1] =
+ $self->offset->[$self->level] + $self->indent_width;
+ $self->{level}++;
+ for my $val (@$value) {
+ $self->{stream} .= ' ' x $self->offset->[$self->level];
+ $self->{stream} .= '-';
+ $self->_emit_node($val, FROMARRAY);
+ }
+ $self->{level}--;
+}
+
+# Emit a mapping key
+sub _emit_key {
+ my $self = shift;
+ my ($value, $context) = @_;
+ $self->{stream} .= ' ' x $self->offset->[$self->level]
+ unless $context == FROMARRAY;
+ $self->_emit_str($value, KEY);
+}
+
+# Emit a blessed SCALAR
+sub _emit_scalar {
+ my $self = shift;
+ my ($value, $tag) = @_;
+ $self->{stream} .= " !$tag";
+ $self->_emit_str($value, BLESSED);
+}
+
+sub _emit {
+ my $self = shift;
+ $self->{stream} .= join '', @_;
+}
+
+# Emit a string value. YAML has many scalar styles. This routine attempts to
+# guess the best style for the text.
+sub _emit_str {
+ my $self = shift;
+ my $type = $_[1] || 0;
+
+ # Use heuristics to find the best scalar emission style.
+ $self->offset->[$self->level + 1] =
+ $self->offset->[$self->level] + $self->indent_width;
+ $self->{level}++;
+
+ my $sf = $type == KEY ? '' : ' ';
+ my $sb = $type == KEY ? '? ' : ' ';
+ my $ef = $type == KEY ? '' : "\n";
+ my $eb = "\n";
+
+ while (1) {
+ $self->_emit($sf),
+ $self->_emit_plain($_[0]),
+ $self->_emit($ef), last
+ if not defined $_[0];
+ $self->_emit($sf, '=', $ef), last
+ if $_[0] eq VALUE;
+ $self->_emit($sf),
+ $self->_emit_double($_[0]),
+ $self->_emit($ef), last
+ if $_[0] =~ /$ESCAPE_CHAR/;
+ if ($_[0] =~ /\n/) {
+ $self->_emit($sb),
+ $self->_emit_block($LIT_CHAR, $_[0]),
+ $self->_emit($eb), last
+ if $self->use_block;
+ Carp::cluck "[YAML] \$UseFold is no longer supported"
+ if $self->use_fold;
+ $self->_emit($sf),
+ $self->_emit_double($_[0]),
+ $self->_emit($ef), last
+ if length $_[0] <= 30;
+ $self->_emit($sf),
+ $self->_emit_double($_[0]),
+ $self->_emit($ef), last
+ if $_[0] !~ /\n\s*\S/;
+ $self->_emit($sb),
+ $self->_emit_block($LIT_CHAR, $_[0]),
+ $self->_emit($eb), last;
+ }
+ $self->_emit($sf),
+ $self->_emit_plain($_[0]),
+ $self->_emit($ef), last
+ if $self->is_valid_plain($_[0]);
+ $self->_emit($sf),
+ $self->_emit_double($_[0]),
+ $self->_emit($ef), last
+ if $_[0] =~ /'/;
+ $self->_emit($sf),
+ $self->_emit_single($_[0]),
+ $self->_emit($ef);
+ last;
+ }
+
+ $self->{level}--;
+
+ return;
+}
+
+# Check whether or not a scalar should be emitted as an plain scalar.
+sub is_valid_plain {
+ my $self = shift;
+ return 0 unless length $_[0];
+ # refer to YAML::Loader::parse_inline_simple()
+ return 0 if $_[0] =~ /^[\s\{\[\~\`\'\"\!\@\#\>\|\%\&\?\*\^]/;
+ return 0 if $_[0] =~ /[\{\[\]\},]/;
+ return 0 if $_[0] =~ /[:\-\?]\s/;
+ return 0 if $_[0] =~ /\s#/;
+ return 0 if $_[0] =~ /\:(\s|$)/;
+ return 0 if $_[0] =~ /[\s\|\>]$/;
+ return 1;
+}
+
+sub _emit_block {
+ my $self = shift;
+ my ($indicator, $value) = @_;
+ $self->{stream} .= $indicator;
+ $value =~ /(\n*)\Z/;
+ my $chomp = length $1 ? (length $1 > 1) ? '+' : '' : '-';
+ $value = '~' if not defined $value;
+ $self->{stream} .= $chomp;
+ $self->{stream} .= $self->indent_width if $value =~ /^\s/;
+ $self->{stream} .= $self->indent($value);
+}
+
+# Plain means that the scalar is unquoted.
+sub _emit_plain {
+ my $self = shift;
+ $self->{stream} .= defined $_[0] ? $_[0] : '~';
+}
+
+# Double quoting is for single lined escaped strings.
+sub _emit_double {
+ my $self = shift;
+ (my $escaped = $self->escape($_[0])) =~ s/"/\\"/g;
+ $self->{stream} .= qq{"$escaped"};
+}
+
+# Single quoting is for single lined unescaped strings.
+sub _emit_single {
+ my $self = shift;
+ my $item = shift;
+ $item =~ s{'}{''}g;
+ $self->{stream} .= "'$item'";
+}
+
+#==============================================================================
+# Utility subroutines.
+#==============================================================================
+
+# Indent a scalar to the current indentation level.
+sub indent {
+ my $self = shift;
+ my ($text) = @_;
+ return $text unless length $text;
+ $text =~ s/\n\Z//;
+ my $indent = ' ' x $self->offset->[$self->level];
+ $text =~ s/^/$indent/gm;
+ $text = "\n$text";
+ return $text;
+}
+
+# Escapes for unprintable characters
+my @escapes = qw(\z \x01 \x02 \x03 \x04 \x05 \x06 \a
+ \x08 \t \n \v \f \r \x0e \x0f
+ \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17
+ \x18 \x19 \x1a \e \x1c \x1d \x1e \x1f
+ );
+
+# Escape the unprintable characters
+sub escape {
+ my $self = shift;
+ my ($text) = @_;
+ $text =~ s/\\/\\\\/g;
+ $text =~ s/([\x00-\x1f])/$escapes[ord($1)]/ge;
+ return $text;
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Dumper - YAML class for dumping Perl objects to YAML
+
+=head1 SYNOPSIS
+
+ use YAML::Dumper;
+ my $dumper = YAML::Dumper->new;
+ $dumper->indent_width(4);
+ print $dumper->dump({foo => 'bar'});
+
+=head1 DESCRIPTION
+
+YAML::Dumper is the module that YAML.pm used to serialize Perl objects to
+YAML. It is fully object oriented and usable on its own.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
--- /dev/null
+package YAML::Dumper::Base;
+use strict; use warnings;
+use YAML::Base; use base 'YAML::Base';
+use YAML::Node;
+
+# YAML Dumping options
+field spec_version => '1.0';
+field indent_width => 2;
+field use_header => 1;
+field use_version => 0;
+field sort_keys => 1;
+field anchor_prefix => '';
+field dump_code => 0;
+field use_block => 0;
+field use_fold => 0;
+field compress_series => 1;
+field inline_series => 0;
+field use_aliases => 1;
+field purity => 0;
+field stringify => 0;
+
+# Properties
+field stream => '';
+field document => 0;
+field transferred => {};
+field id_refcnt => {};
+field id_anchor => {};
+field anchor => 1;
+field level => 0;
+field offset => [];
+field headless => 0;
+field blessed_map => {};
+
+# Global Options are an idea taken from Data::Dumper. Really they are just
+# sugar on top of real OO properties. They make the simple Dump/Load API
+# easy to configure.
+sub set_global_options {
+ my $self = shift;
+ $self->spec_version($YAML::SpecVersion)
+ if defined $YAML::SpecVersion;
+ $self->indent_width($YAML::Indent)
+ if defined $YAML::Indent;
+ $self->use_header($YAML::UseHeader)
+ if defined $YAML::UseHeader;
+ $self->use_version($YAML::UseVersion)
+ if defined $YAML::UseVersion;
+ $self->sort_keys($YAML::SortKeys)
+ if defined $YAML::SortKeys;
+ $self->anchor_prefix($YAML::AnchorPrefix)
+ if defined $YAML::AnchorPrefix;
+ $self->dump_code($YAML::DumpCode || $YAML::UseCode)
+ if defined $YAML::DumpCode or defined $YAML::UseCode;
+ $self->use_block($YAML::UseBlock)
+ if defined $YAML::UseBlock;
+ $self->use_fold($YAML::UseFold)
+ if defined $YAML::UseFold;
+ $self->compress_series($YAML::CompressSeries)
+ if defined $YAML::CompressSeries;
+ $self->inline_series($YAML::InlineSeries)
+ if defined $YAML::InlineSeries;
+ $self->use_aliases($YAML::UseAliases)
+ if defined $YAML::UseAliases;
+ $self->purity($YAML::Purity)
+ if defined $YAML::Purity;
+ $self->stringify($YAML::Stringify)
+ if defined $YAML::Stringify;
+}
+
+sub dump {
+ my $self = shift;
+ $self->die('dump() not implemented in this class.');
+}
+
+sub blessed {
+ my $self = shift;
+ my ($ref) = @_;
+ $ref = \$_[0] unless ref $ref;
+ my (undef, undef, $node_id) = YAML::Base->node_info($ref);
+ $self->{blessed_map}->{$node_id};
+}
+
+sub bless {
+ my $self = shift;
+ my ($ref, $blessing) = @_;
+ my $ynode;
+ $ref = \$_[0] unless ref $ref;
+ my (undef, undef, $node_id) = YAML::Base->node_info($ref);
+ if (not defined $blessing) {
+ $ynode = YAML::Node->new($ref);
+ }
+ elsif (ref $blessing) {
+ $self->die() unless ynode($blessing);
+ $ynode = $blessing;
+ }
+ else {
+ no strict 'refs';
+ my $transfer = $blessing . "::yaml_dump";
+ $self->die() unless defined &{$transfer};
+ $ynode = &{$transfer}($ref);
+ $self->die() unless ynode($ynode);
+ }
+ $self->{blessed_map}->{$node_id} = $ynode;
+ my $object = ynode($ynode) or $self->die();
+ return $object;
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Dumper::Base - Base class for YAML Dumper classes
+
+=head1 SYNOPSIS
+
+ package YAML::Dumper::Something;
+ use YAML::Dumper::Base -base;
+
+=head1 DESCRIPTION
+
+YAML::Dumper::Base is a base class for creating YAML dumper classes.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+This program is free software; you can redistribute it and/or modify it
+under the same terms as Perl itself.
+
+See L<http://www.perl.com/perl/misc/Artistic.html>
+
+=cut
--- /dev/null
+package YAML::Error;
+use strict; use warnings;
+use YAML::Base; use base 'YAML::Base';
+
+field 'code';
+field 'type' => 'Error';
+field 'line';
+field 'document';
+field 'arguments' => [];
+
+my ($error_messages, %line_adjust);
+
+sub format_message {
+ my $self = shift;
+ my $output = 'YAML ' . $self->type . ': ';
+ my $code = $self->code;
+ if ($error_messages->{$code}) {
+ $code = sprintf($error_messages->{$code}, @{$self->arguments});
+ }
+ $output .= $code . "\n";
+
+ $output .= ' Code: ' . $self->code . "\n"
+ if defined $self->code;
+ $output .= ' Line: ' . $self->line . "\n"
+ if defined $self->line;
+ $output .= ' Document: ' . $self->document . "\n"
+ if defined $self->document;
+ return $output;
+}
+
+sub error_messages {
+ $error_messages;
+}
+
+%$error_messages = map {s/^\s+//;$_} split "\n", <<'...';
+YAML_PARSE_ERR_BAD_CHARS
+ Invalid characters in stream. This parser only supports printable ASCII
+YAML_PARSE_ERR_NO_FINAL_NEWLINE
+ Stream does not end with newline character
+YAML_PARSE_ERR_BAD_MAJOR_VERSION
+ Can't parse a %s document with a 1.0 parser
+YAML_PARSE_WARN_BAD_MINOR_VERSION
+ Parsing a %s document with a 1.0 parser
+YAML_PARSE_WARN_MULTIPLE_DIRECTIVES
+ '%s directive used more than once'
+YAML_PARSE_ERR_TEXT_AFTER_INDICATOR
+ No text allowed after indicator
+YAML_PARSE_ERR_NO_ANCHOR
+ No anchor for alias '*%s'
+YAML_PARSE_ERR_NO_SEPARATOR
+ Expected separator '---'
+YAML_PARSE_ERR_SINGLE_LINE
+ Couldn't parse single line value
+YAML_PARSE_ERR_BAD_ANCHOR
+ Invalid anchor
+YAML_DUMP_ERR_INVALID_INDENT
+ Invalid Indent width specified: '%s'
+YAML_LOAD_USAGE
+ usage: YAML::Load($yaml_stream_scalar)
+YAML_PARSE_ERR_BAD_NODE
+ Can't parse node
+YAML_PARSE_ERR_BAD_EXPLICIT
+ Unsupported explicit transfer: '%s'
+YAML_DUMP_USAGE_DUMPCODE
+ Invalid value for DumpCode: '%s'
+YAML_LOAD_ERR_FILE_INPUT
+ Couldn't open %s for input:\n%s
+YAML_DUMP_ERR_FILE_CONCATENATE
+ Can't concatenate to YAML file %s
+YAML_DUMP_ERR_FILE_OUTPUT
+ Couldn't open %s for output:\n%s
+YAML_DUMP_ERR_NO_HEADER
+ With UseHeader=0, the node must be a plain hash or array
+YAML_DUMP_WARN_BAD_NODE_TYPE
+ Can't perform serialization for node type: '%s'
+YAML_EMIT_WARN_KEYS
+ Encountered a problem with 'keys':\n%s
+YAML_DUMP_WARN_DEPARSE_FAILED
+ Deparse failed for CODE reference
+YAML_DUMP_WARN_CODE_DUMMY
+ Emitting dummy subroutine for CODE reference
+YAML_PARSE_ERR_MANY_EXPLICIT
+ More than one explicit transfer
+YAML_PARSE_ERR_MANY_IMPLICIT
+ More than one implicit request
+YAML_PARSE_ERR_MANY_ANCHOR
+ More than one anchor
+YAML_PARSE_ERR_ANCHOR_ALIAS
+ Can't define both an anchor and an alias
+YAML_PARSE_ERR_BAD_ALIAS
+ Invalid alias
+YAML_PARSE_ERR_MANY_ALIAS
+ More than one alias
+YAML_LOAD_ERR_NO_CONVERT
+ Can't convert implicit '%s' node to explicit '%s' node
+YAML_LOAD_ERR_NO_DEFAULT_VALUE
+ No default value for '%s' explicit transfer
+YAML_LOAD_ERR_NON_EMPTY_STRING
+ Only the empty string can be converted to a '%s'
+YAML_LOAD_ERR_BAD_MAP_TO_SEQ
+ Can't transfer map as sequence. Non numeric key '%s' encountered.
+YAML_DUMP_ERR_BAD_GLOB
+ '%s' is an invalid value for Perl glob
+YAML_DUMP_ERR_BAD_REGEXP
+ '%s' is an invalid value for Perl Regexp
+YAML_LOAD_ERR_BAD_MAP_ELEMENT
+ Invalid element in map
+YAML_LOAD_WARN_DUPLICATE_KEY
+ Duplicate map key found. Ignoring.
+YAML_LOAD_ERR_BAD_SEQ_ELEMENT
+ Invalid element in sequence
+YAML_PARSE_ERR_INLINE_MAP
+ Can't parse inline map
+YAML_PARSE_ERR_INLINE_SEQUENCE
+ Can't parse inline sequence
+YAML_PARSE_ERR_BAD_DOUBLE
+ Can't parse double quoted string
+YAML_PARSE_ERR_BAD_SINGLE
+ Can't parse single quoted string
+YAML_PARSE_ERR_BAD_INLINE_IMPLICIT
+ Can't parse inline implicit value '%s'
+YAML_PARSE_ERR_BAD_IMPLICIT
+ Unrecognized implicit value '%s'
+YAML_PARSE_ERR_INDENTATION
+ Error. Invalid indentation level
+YAML_PARSE_ERR_INCONSISTENT_INDENTATION
+ Inconsistent indentation level
+YAML_LOAD_WARN_UNRESOLVED_ALIAS
+ Can't resolve alias *%s
+YAML_LOAD_WARN_NO_REGEXP_IN_REGEXP
+ No 'REGEXP' element for Perl regexp
+YAML_LOAD_WARN_BAD_REGEXP_ELEM
+ Unknown element '%s' in Perl regexp
+YAML_LOAD_WARN_GLOB_NAME
+ No 'NAME' element for Perl glob
+YAML_LOAD_WARN_PARSE_CODE
+ Couldn't parse Perl code scalar: %s
+YAML_LOAD_WARN_CODE_DEPARSE
+ Won't parse Perl code unless $YAML::LoadCode is set
+YAML_EMIT_ERR_BAD_LEVEL
+ Internal Error: Bad level detected
+YAML_PARSE_WARN_AMBIGUOUS_TAB
+ Amibiguous tab converted to spaces
+YAML_LOAD_WARN_BAD_GLOB_ELEM
+ Unknown element '%s' in Perl glob
+YAML_PARSE_ERR_ZERO_INDENT
+ Can't use zero as an indentation width
+YAML_LOAD_WARN_GLOB_IO
+ Can't load an IO filehandle. Yet!!!
+...
+
+%line_adjust = map {($_, 1)}
+ qw(YAML_PARSE_ERR_BAD_MAJOR_VERSION
+ YAML_PARSE_WARN_BAD_MINOR_VERSION
+ YAML_PARSE_ERR_TEXT_AFTER_INDICATOR
+ YAML_PARSE_ERR_NO_ANCHOR
+ YAML_PARSE_ERR_MANY_EXPLICIT
+ YAML_PARSE_ERR_MANY_IMPLICIT
+ YAML_PARSE_ERR_MANY_ANCHOR
+ YAML_PARSE_ERR_ANCHOR_ALIAS
+ YAML_PARSE_ERR_BAD_ALIAS
+ YAML_PARSE_ERR_MANY_ALIAS
+ YAML_LOAD_ERR_NO_CONVERT
+ YAML_LOAD_ERR_NO_DEFAULT_VALUE
+ YAML_LOAD_ERR_NON_EMPTY_STRING
+ YAML_LOAD_ERR_BAD_MAP_TO_SEQ
+ YAML_LOAD_ERR_BAD_STR_TO_INT
+ YAML_LOAD_ERR_BAD_STR_TO_DATE
+ YAML_LOAD_ERR_BAD_STR_TO_TIME
+ YAML_LOAD_WARN_DUPLICATE_KEY
+ YAML_PARSE_ERR_INLINE_MAP
+ YAML_PARSE_ERR_INLINE_SEQUENCE
+ YAML_PARSE_ERR_BAD_DOUBLE
+ YAML_PARSE_ERR_BAD_SINGLE
+ YAML_PARSE_ERR_BAD_INLINE_IMPLICIT
+ YAML_PARSE_ERR_BAD_IMPLICIT
+ YAML_LOAD_WARN_NO_REGEXP_IN_REGEXP
+ YAML_LOAD_WARN_BAD_REGEXP_ELEM
+ YAML_LOAD_WARN_REGEXP_CREATE
+ YAML_LOAD_WARN_GLOB_NAME
+ YAML_LOAD_WARN_PARSE_CODE
+ YAML_LOAD_WARN_CODE_DEPARSE
+ YAML_LOAD_WARN_BAD_GLOB_ELEM
+ YAML_PARSE_ERR_ZERO_INDENT
+ );
+
+package YAML::Warning;
+use base 'YAML::Error';
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Error - Error formatting class for YAML modules
+
+=head1 SYNOPSIS
+
+ $self->die('YAML_PARSE_ERR_NO_ANCHOR', $alias);
+ $self->warn('YAML_LOAD_WARN_DUPLICATE_KEY');
+
+=head1 DESCRIPTION
+
+This module provides a C<die> and a C<warn> facility.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
--- /dev/null
+package YAML::Loader;
+use strict; use warnings;
+use YAML::Base;
+use base 'YAML::Loader::Base';
+use YAML::Types;
+
+# Context constants
+use constant LEAF => 1;
+use constant COLLECTION => 2;
+use constant VALUE => "\x07YAML\x07VALUE\x07";
+use constant COMMENT => "\x07YAML\x07COMMENT\x07";
+
+# Common YAML character sets
+my $ESCAPE_CHAR = '[\\x00-\\x08\\x0b-\\x0d\\x0e-\\x1f]';
+my $FOLD_CHAR = '>';
+my $LIT_CHAR = '|';
+my $LIT_CHAR_RX = "\\$LIT_CHAR";
+
+sub load {
+ my $self = shift;
+ $self->stream($_[0] || '');
+ return $self->_parse();
+}
+
+# Top level function for parsing. Parse each document in order and
+# handle processing for YAML headers.
+sub _parse {
+ my $self = shift;
+ my (%directives, $preface);
+ $self->{stream} =~ s|\015\012|\012|g;
+ $self->{stream} =~ s|\015|\012|g;
+ $self->line(0);
+ $self->die('YAML_PARSE_ERR_BAD_CHARS')
+ if $self->stream =~ /$ESCAPE_CHAR/;
+ $self->die('YAML_PARSE_ERR_NO_FINAL_NEWLINE')
+ if length($self->stream) and
+ $self->{stream} !~ s/(.)\n\Z/$1/s;
+ $self->lines([split /\x0a/, $self->stream, -1]);
+ $self->line(1);
+ # Throw away any comments or blanks before the header (or start of
+ # content for headerless streams)
+ $self->_parse_throwaway_comments();
+ $self->document(0);
+ $self->documents([]);
+ # Add an "assumed" header if there is no header and the stream is
+ # not empty (after initial throwaways).
+ if (not $self->eos) {
+ if ($self->lines->[0] !~ /^---(\s|$)/) {
+ unshift @{$self->lines}, '---';
+ $self->{line}--;
+ }
+ }
+
+ # Main Loop. Parse out all the top level nodes and return them.
+ while (not $self->eos) {
+ $self->anchor2node({});
+ $self->{document}++;
+ $self->done(0);
+ $self->level(0);
+ $self->offset->[0] = -1;
+
+ if ($self->lines->[0] =~ /^---\s*(.*)$/) {
+ my @words = split /\s+/, $1;
+ %directives = ();
+ while (@words && $words[0] =~ /^#(\w+):(\S.*)$/) {
+ my ($key, $value) = ($1, $2);
+ shift(@words);
+ if (defined $directives{$key}) {
+ $self->warn('YAML_PARSE_WARN_MULTIPLE_DIRECTIVES',
+ $key, $self->document);
+ next;
+ }
+ $directives{$key} = $value;
+ }
+ $self->preface(join ' ', @words);
+ }
+ else {
+ $self->die('YAML_PARSE_ERR_NO_SEPARATOR');
+ }
+
+ if (not $self->done) {
+ $self->_parse_next_line(COLLECTION);
+ }
+ if ($self->done) {
+ $self->{indent} = -1;
+ $self->content('');
+ }
+
+ $directives{YAML} ||= '1.0';
+ $directives{TAB} ||= 'NONE';
+ ($self->{major_version}, $self->{minor_version}) =
+ split /\./, $directives{YAML}, 2;
+ $self->die('YAML_PARSE_ERR_BAD_MAJOR_VERSION', $directives{YAML})
+ if $self->major_version ne '1';
+ $self->warn('YAML_PARSE_WARN_BAD_MINOR_VERSION', $directives{YAML})
+ if $self->minor_version ne '0';
+ $self->die('Unrecognized TAB policy')
+ unless $directives{TAB} =~ /^(NONE|\d+)(:HARD)?$/;
+
+ push @{$self->documents}, $self->_parse_node();
+ }
+ return wantarray ? @{$self->documents} : $self->documents->[-1];
+}
+
+# This function is the dispatcher for parsing each node. Every node
+# recurses back through here. (Inlines are an exception as they have
+# their own sub-parser.)
+sub _parse_node {
+ my $self = shift;
+ my $preface = $self->preface;
+ $self->preface('');
+ my ($node, $type, $indicator, $escape, $chomp) = ('') x 5;
+ my ($anchor, $alias, $explicit, $implicit, $class) = ('') x 5;
+ ($anchor, $alias, $explicit, $implicit, $preface) =
+ $self->_parse_qualifiers($preface);
+ if ($anchor) {
+ $self->anchor2node->{$anchor} = CORE::bless [], 'YAML-anchor2node';
+ }
+ $self->inline('');
+ while (length $preface) {
+ my $line = $self->line - 1;
+ if ($preface =~ s/^($FOLD_CHAR|$LIT_CHAR_RX)(-|\+)?\d*\s*//) {
+ $indicator = $1;
+ $chomp = $2 if defined($2);
+ }
+ else {
+ $self->die('YAML_PARSE_ERR_TEXT_AFTER_INDICATOR') if $indicator;
+ $self->inline($preface);
+ $preface = '';
+ }
+ }
+ if ($alias) {
+ $self->die('YAML_PARSE_ERR_NO_ANCHOR', $alias)
+ unless defined $self->anchor2node->{$alias};
+ if (ref($self->anchor2node->{$alias}) ne 'YAML-anchor2node') {
+ $node = $self->anchor2node->{$alias};
+ }
+ else {
+ $node = do {my $sv = "*$alias"};
+ push @{$self->anchor2node->{$alias}}, [\$node, $self->line];
+ }
+ }
+ elsif (length $self->inline) {
+ $node = $self->_parse_inline(1, $implicit, $explicit);
+ if (length $self->inline) {
+ $self->die('YAML_PARSE_ERR_SINGLE_LINE');
+ }
+ }
+ elsif ($indicator eq $LIT_CHAR) {
+ $self->{level}++;
+ $node = $self->_parse_block($chomp);
+ $node = $self->_parse_implicit($node) if $implicit;
+ $self->{level}--;
+ }
+ elsif ($indicator eq $FOLD_CHAR) {
+ $self->{level}++;
+ $node = $self->_parse_unfold($chomp);
+ $node = $self->_parse_implicit($node) if $implicit;
+ $self->{level}--;
+ }
+ else {
+ $self->{level}++;
+ $self->offset->[$self->level] ||= 0;
+ if ($self->indent == $self->offset->[$self->level]) {
+ if ($self->content =~ /^-( |$)/) {
+ $node = $self->_parse_seq($anchor);
+ }
+ elsif ($self->content =~ /(^\?|\:( |$))/) {
+ $node = $self->_parse_mapping($anchor);
+ }
+ elsif ($preface =~ /^\s*$/) {
+ $node = $self->_parse_implicit('');
+ }
+ else {
+ $self->die('YAML_PARSE_ERR_BAD_NODE');
+ }
+ }
+ else {
+ $node = undef;
+ }
+ $self->{level}--;
+ }
+ $#{$self->offset} = $self->level;
+
+ if ($explicit) {
+ if ($class) {
+ if (not ref $node) {
+ my $copy = $node;
+ undef $node;
+ $node = \$copy;
+ }
+ CORE::bless $node, $class;
+ }
+ else {
+ $node = $self->_parse_explicit($node, $explicit);
+ }
+ }
+ if ($anchor) {
+ if (ref($self->anchor2node->{$anchor}) eq 'YAML-anchor2node') {
+ # XXX Can't remember what this code actually does
+ for my $ref (@{$self->anchor2node->{$anchor}}) {
+ ${$ref->[0]} = $node;
+ $self->warn('YAML_LOAD_WARN_UNRESOLVED_ALIAS',
+ $anchor, $ref->[1]);
+ }
+ }
+ $self->anchor2node->{$anchor} = $node;
+ }
+ return $node;
+}
+
+# Preprocess the qualifiers that may be attached to any node.
+sub _parse_qualifiers {
+ my $self = shift;
+ my ($preface) = @_;
+ my ($anchor, $alias, $explicit, $implicit, $token) = ('') x 5;
+ $self->inline('');
+ while ($preface =~ /^[&*!]/) {
+ my $line = $self->line - 1;
+ if ($preface =~ s/^\!(\S+)\s*//) {
+ $self->die('YAML_PARSE_ERR_MANY_EXPLICIT') if $explicit;
+ $explicit = $1;
+ }
+ elsif ($preface =~ s/^\!\s*//) {
+ $self->die('YAML_PARSE_ERR_MANY_IMPLICIT') if $implicit;
+ $implicit = 1;
+ }
+ elsif ($preface =~ s/^\&([^ ,:]+)\s*//) {
+ $token = $1;
+ $self->die('YAML_PARSE_ERR_BAD_ANCHOR')
+ unless $token =~ /^[a-zA-Z0-9]+$/;
+ $self->die('YAML_PARSE_ERR_MANY_ANCHOR') if $anchor;
+ $self->die('YAML_PARSE_ERR_ANCHOR_ALIAS') if $alias;
+ $anchor = $token;
+ }
+ elsif ($preface =~ s/^\*([^ ,:]+)\s*//) {
+ $token = $1;
+ $self->die('YAML_PARSE_ERR_BAD_ALIAS')
+ unless $token =~ /^[a-zA-Z0-9]+$/;
+ $self->die('YAML_PARSE_ERR_MANY_ALIAS') if $alias;
+ $self->die('YAML_PARSE_ERR_ANCHOR_ALIAS') if $anchor;
+ $alias = $token;
+ }
+ }
+ return ($anchor, $alias, $explicit, $implicit, $preface);
+}
+
+# Morph a node to it's explicit type
+sub _parse_explicit {
+ my $self = shift;
+ my ($node, $explicit) = @_;
+ my ($type, $class);
+ if ($explicit =~ /^\!perl\/(hash|array|scalar)\:(\w(\w|\:\:)*)?$/) {
+ ($type, $class) = (($1 || ''), ($2 || ''));
+ if (ref $node) {
+ return CORE::bless $node, $class;
+ }
+ else {
+ return CORE::bless \$node, $class;
+ }
+ }
+ if ($explicit =~
+ /^\!?perl\/(undef|glob|regexp|code|ref)\:(\w(\w|\:\:)*)?$/) {
+ ($type, $class) = (($1 || ''), ($2 || ''));
+ my $type_class = "YAML::Type::$type";
+ no strict 'refs';
+ if ($type_class->can('yaml_load')) {
+ return $type_class->yaml_load($node, $class, $self);
+ }
+ else {
+ $self->die('YAML_LOAD_ERR_NO_CONVERT', 'XXX', $explicit);
+ }
+ }
+ # This !perl/@Foo and !perl/$Foo are deprecated but still parsed
+ elsif ($YAML::TagClass->{$explicit} ||
+ $explicit =~ m{^perl/(\@|\$)?([a-zA-Z](\w|::)+)$}
+ ) {
+ $class = $YAML::TagClass->{$explicit} || $2;
+ if ($class->can('yaml_load')) {
+ require YAML::Node;
+ return $class->yaml_load(YAML::Node->new($node, $explicit));
+ }
+ else {
+ if (ref $node) {
+ return CORE::bless $node, $class;
+ }
+ else {
+ return CORE::bless \$node, $class;
+ }
+ }
+ }
+ elsif (ref $node) {
+ require YAML::Node;
+ return YAML::Node->new($node, $explicit);
+ }
+ else {
+ # XXX This is likely wrong. Failing test:
+ # --- !unknown 'scalar value'
+ return $node;
+ }
+}
+
+# Parse a YAML mapping into a Perl hash
+sub _parse_mapping {
+ my $self = shift;
+ my ($anchor) = @_;
+ my $mapping = {};
+ $self->anchor2node->{$anchor} = $mapping;
+ my $key;
+ while (not $self->done and $self->indent == $self->offset->[$self->level]) {
+ # If structured key:
+ if ($self->{content} =~ s/^\?\s*//) {
+ $self->preface($self->content);
+ $self->_parse_next_line(COLLECTION);
+ $key = $self->_parse_node();
+ $key = "$key";
+ }
+ # If "default" key (equals sign)
+ elsif ($self->{content} =~ s/^\=\s*//) {
+ $key = VALUE;
+ }
+ # If "comment" key (slash slash)
+ elsif ($self->{content} =~ s/^\=\s*//) {
+ $key = COMMENT;
+ }
+ # Regular scalar key:
+ else {
+ $self->inline($self->content);
+ $key = $self->_parse_inline();
+ $key = "$key";
+ $self->content($self->inline);
+ $self->inline('');
+ }
+
+ unless ($self->{content} =~ s/^:\s*//) {
+ $self->die('YAML_LOAD_ERR_BAD_MAP_ELEMENT');
+ }
+ $self->preface($self->content);
+ my $line = $self->line;
+ $self->_parse_next_line(COLLECTION);
+ my $value = $self->_parse_node();
+ if (exists $mapping->{$key}) {
+ $self->warn('YAML_LOAD_WARN_DUPLICATE_KEY');
+ }
+ else {
+ $mapping->{$key} = $value;
+ }
+ }
+ return $mapping;
+}
+
+# Parse a YAML sequence into a Perl array
+sub _parse_seq {
+ my $self = shift;
+ my ($anchor) = @_;
+ my $seq = [];
+ $self->anchor2node->{$anchor} = $seq;
+ while (not $self->done and $self->indent == $self->offset->[$self->level]) {
+ if ($self->content =~ /^-(?: (.*))?$/) {
+ $self->preface(defined($1) ? $1 : '');
+ }
+ else {
+ $self->die('YAML_LOAD_ERR_BAD_SEQ_ELEMENT');
+ }
+ if ($self->preface =~ /^(\s*)(\w.*\:(?: |$).*)$/) {
+ $self->indent($self->offset->[$self->level] + 2 + length($1));
+ $self->content($2);
+ $self->level($self->level + 1);
+ $self->offset->[$self->level] = $self->indent;
+ $self->preface('');
+ push @$seq, $self->_parse_mapping('');
+ $self->{level}--;
+ $#{$self->offset} = $self->level;
+ }
+ else {
+ $self->_parse_next_line(COLLECTION);
+ push @$seq, $self->_parse_node();
+ }
+ }
+ return $seq;
+}
+
+# Parse an inline value. Since YAML supports inline collections, this is
+# the top level of a sub parsing.
+sub _parse_inline {
+ my $self = shift;
+ my ($top, $top_implicit, $top_explicit) = (@_, '', '', '');
+ $self->{inline} =~ s/^\s*(.*)\s*$/$1/; # OUCH - mugwump
+ my ($node, $anchor, $alias, $explicit, $implicit) = ('') x 5;
+ ($anchor, $alias, $explicit, $implicit, $self->{inline}) =
+ $self->_parse_qualifiers($self->inline);
+ if ($anchor) {
+ $self->anchor2node->{$anchor} = CORE::bless [], 'YAML-anchor2node';
+ }
+ $implicit ||= $top_implicit;
+ $explicit ||= $top_explicit;
+ ($top_implicit, $top_explicit) = ('', '');
+ if ($alias) {
+ $self->die('YAML_PARSE_ERR_NO_ANCHOR', $alias)
+ unless defined $self->anchor2node->{$alias};
+ if (ref($self->anchor2node->{$alias}) ne 'YAML-anchor2node') {
+ $node = $self->anchor2node->{$alias};
+ }
+ else {
+ $node = do {my $sv = "*$alias"};
+ push @{$self->anchor2node->{$alias}}, [\$node, $self->line];
+ }
+ }
+ elsif ($self->inline =~ /^\{/) {
+ $node = $self->_parse_inline_mapping($anchor);
+ }
+ elsif ($self->inline =~ /^\[/) {
+ $node = $self->_parse_inline_seq($anchor);
+ }
+ elsif ($self->inline =~ /^"/) {
+ $node = $self->_parse_inline_double_quoted();
+ $node = $self->_unescape($node);
+ $node = $self->_parse_implicit($node) if $implicit;
+ }
+ elsif ($self->inline =~ /^'/) {
+ $node = $self->_parse_inline_single_quoted();
+ $node = $self->_parse_implicit($node) if $implicit;
+ }
+ else {
+ if ($top) {
+ $node = $self->inline;
+ $self->inline('');
+ }
+ else {
+ $node = $self->_parse_inline_simple();
+ }
+ $node = $self->_parse_implicit($node) unless $explicit;
+ }
+ if ($explicit) {
+ $node = $self->_parse_explicit($node, $explicit);
+ }
+ if ($anchor) {
+ if (ref($self->anchor2node->{$anchor}) eq 'YAML-anchor2node') {
+ for my $ref (@{$self->anchor2node->{$anchor}}) {
+ ${$ref->[0]} = $node;
+ $self->warn('YAML_LOAD_WARN_UNRESOLVED_ALIAS',
+ $anchor, $ref->[1]);
+ }
+ }
+ $self->anchor2node->{$anchor} = $node;
+ }
+ return $node;
+}
+
+# Parse the inline YAML mapping into a Perl hash
+sub _parse_inline_mapping {
+ my $self = shift;
+ my ($anchor) = @_;
+ my $node = {};
+ $self->anchor2node->{$anchor} = $node;
+
+ $self->die('YAML_PARSE_ERR_INLINE_MAP')
+ unless $self->{inline} =~ s/^\{\s*//;
+ while (not $self->{inline} =~ s/^\s*\}//) {
+ my $key = $self->_parse_inline();
+ $self->die('YAML_PARSE_ERR_INLINE_MAP')
+ unless $self->{inline} =~ s/^\: \s*//;
+ my $value = $self->_parse_inline();
+ if (exists $node->{$key}) {
+ $self->warn('YAML_LOAD_WARN_DUPLICATE_KEY');
+ }
+ else {
+ $node->{$key} = $value;
+ }
+ next if $self->inline =~ /^\s*\}/;
+ $self->die('YAML_PARSE_ERR_INLINE_MAP')
+ unless $self->{inline} =~ s/^\,\s*//;
+ }
+ return $node;
+}
+
+# Parse the inline YAML sequence into a Perl array
+sub _parse_inline_seq {
+ my $self = shift;
+ my ($anchor) = @_;
+ my $node = [];
+ $self->anchor2node->{$anchor} = $node;
+
+ $self->die('YAML_PARSE_ERR_INLINE_SEQUENCE')
+ unless $self->{inline} =~ s/^\[\s*//;
+ while (not $self->{inline} =~ s/^\s*\]//) {
+ my $value = $self->_parse_inline();
+ push @$node, $value;
+ next if $self->inline =~ /^\s*\]/;
+ $self->die('YAML_PARSE_ERR_INLINE_SEQUENCE')
+ unless $self->{inline} =~ s/^\,\s*//;
+ }
+ return $node;
+}
+
+# Parse the inline double quoted string.
+sub _parse_inline_double_quoted {
+ my $self = shift;
+ my $node;
+ if ($self->inline =~ /^"((?:\\"|[^"])*)"\s*(.*)$/) {
+ $node = $1;
+ $self->inline($2);
+ $node =~ s/\\"/"/g;
+ }
+ else {
+ $self->die('YAML_PARSE_ERR_BAD_DOUBLE');
+ }
+ return $node;
+}
+
+
+# Parse the inline single quoted string.
+sub _parse_inline_single_quoted {
+ my $self = shift;
+ my $node;
+ if ($self->inline =~ /^'((?:''|[^'])*)'\s*(.*)$/) {
+ $node = $1;
+ $self->inline($2);
+ $node =~ s/''/'/g;
+ }
+ else {
+ $self->die('YAML_PARSE_ERR_BAD_SINGLE');
+ }
+ return $node;
+}
+
+# Parse the inline unquoted string and do implicit typing.
+sub _parse_inline_simple {
+ my $self = shift;
+ my $value;
+ if ($self->inline =~ /^(|[^!@#%^&*].*?)(?=[\[\]\{\},]|, |: |- |:\s*$|$)/) {
+ $value = $1;
+ substr($self->{inline}, 0, length($1)) = '';
+ }
+ else {
+ $self->die('YAML_PARSE_ERR_BAD_INLINE_IMPLICIT', $value);
+ }
+ return $value;
+}
+
+sub _parse_implicit {
+ my $self = shift;
+ my ($value) = @_;
+ $value =~ s/\s*$//;
+ return $value if $value eq '';
+ return undef if $value =~ /^~$/;
+ return $value
+ unless $value =~ /^[\@\`\^]/ or
+ $value =~ /^[\-\?]\s/;
+ $self->die('YAML_PARSE_ERR_BAD_IMPLICIT', $value);
+}
+
+# Unfold a YAML multiline scalar into a single string.
+sub _parse_unfold {
+ my $self = shift;
+ my ($chomp) = @_;
+ my $node = '';
+ my $space = 0;
+ while (not $self->done and $self->indent == $self->offset->[$self->level]) {
+ $node .= $self->content. "\n";
+ $self->_parse_next_line(LEAF);
+ }
+ $node =~ s/^(\S.*)\n(?=\S)/$1 /gm;
+ $node =~ s/^(\S.*)\n(\n+\S)/$1$2/gm;
+ $node =~ s/\n*\Z// unless $chomp eq '+';
+ $node .= "\n" unless $chomp;
+ return $node;
+}
+
+# Parse a YAML block style scalar. This is like a Perl here-document.
+sub _parse_block {
+ my $self = shift;
+ my ($chomp) = @_;
+ my $node = '';
+ while (not $self->done and $self->indent == $self->offset->[$self->level]) {
+ $node .= $self->content . "\n";
+ $self->_parse_next_line(LEAF);
+ }
+ return $node if '+' eq $chomp;
+ $node =~ s/\n*\Z/\n/;
+ $node =~ s/\n\Z// if $chomp eq '-';
+ return $node;
+}
+
+# Handle Perl style '#' comments. Comments must be at the same indentation
+# level as the collection line following them.
+sub _parse_throwaway_comments {
+ my $self = shift;
+ while (@{$self->lines} and
+ $self->lines->[0] =~ m{^\s*(\#|$)}
+ ) {
+ shift @{$self->lines};
+ $self->{line}++;
+ }
+ $self->eos($self->{done} = not @{$self->lines});
+}
+
+# This is the routine that controls what line is being parsed. It gets called
+# once for each line in the YAML stream.
+#
+# This routine must:
+# 1) Skip past the current line
+# 2) Determine the indentation offset for a new level
+# 3) Find the next _content_ line
+# A) Skip over any throwaways (Comments/blanks)
+# B) Set $self->indent, $self->content, $self->line
+# 4) Expand tabs appropriately
+sub _parse_next_line {
+ my $self = shift;
+ my ($type) = @_;
+ my $level = $self->level;
+ my $offset = $self->offset->[$level];
+ $self->die('YAML_EMIT_ERR_BAD_LEVEL') unless defined $offset;
+ shift @{$self->lines};
+ $self->eos($self->{done} = not @{$self->lines});
+ return if $self->eos;
+ $self->{line}++;
+
+ # Determine the offset for a new leaf node
+ if ($self->preface =~
+ qr/(?:^|\s)(?:$FOLD_CHAR|$LIT_CHAR_RX)(?:-|\+)?(\d*)\s*$/
+ ) {
+ $self->die('YAML_PARSE_ERR_ZERO_INDENT')
+ if length($1) and $1 == 0;
+ $type = LEAF;
+ if (length($1)) {
+ $self->offset->[$level + 1] = $offset + $1;
+ }
+ else {
+ # First get rid of any comments.
+ while (@{$self->lines} && ($self->lines->[0] =~ /^\s*#/)) {
+ $self->lines->[0] =~ /^( *)/ or die;
+ last unless length($1) <= $offset;
+ shift @{$self->lines};
+ $self->{line}++;
+ }
+ $self->eos($self->{done} = not @{$self->lines});
+ return if $self->eos;
+ if ($self->lines->[0] =~ /^( *)\S/ and length($1) > $offset) {
+ $self->offset->[$level+1] = length($1);
+ }
+ else {
+ $self->offset->[$level+1] = $offset + 1;
+ }
+ }
+ $offset = $self->offset->[++$level];
+ }
+ # Determine the offset for a new collection level
+ elsif ($type == COLLECTION and
+ $self->preface =~ /^(\s*(\!\S*|\&\S+))*\s*$/) {
+ $self->_parse_throwaway_comments();
+ if ($self->eos) {
+ $self->offset->[$level+1] = $offset + 1;
+ return;
+ }
+ else {
+ $self->lines->[0] =~ /^( *)\S/ or die;
+ if (length($1) > $offset) {
+ $self->offset->[$level+1] = length($1);
+ }
+ else {
+ $self->offset->[$level+1] = $offset + 1;
+ }
+ }
+ $offset = $self->offset->[++$level];
+ }
+
+ if ($type == LEAF) {
+ while (@{$self->lines} and
+ $self->lines->[0] =~ m{^( *)(\#)} and
+ length($1) < $offset
+ ) {
+ shift @{$self->lines};
+ $self->{line}++;
+ }
+ $self->eos($self->{done} = not @{$self->lines});
+ }
+ else {
+ $self->_parse_throwaway_comments();
+ }
+ return if $self->eos;
+
+ if ($self->lines->[0] =~ /^---(\s|$)/) {
+ $self->done(1);
+ return;
+ }
+ if ($type == LEAF and
+ $self->lines->[0] =~ /^ {$offset}(.*)$/
+ ) {
+ $self->indent($offset);
+ $self->content($1);
+ }
+ elsif ($self->lines->[0] =~ /^\s*$/) {
+ $self->indent($offset);
+ $self->content('');
+ }
+ else {
+ $self->lines->[0] =~ /^( *)(\S.*)$/;
+ while ($self->offset->[$level] > length($1)) {
+ $level--;
+ }
+ $self->die('YAML_PARSE_ERR_INCONSISTENT_INDENTATION')
+ if $self->offset->[$level] != length($1);
+ $self->indent(length($1));
+ $self->content($2);
+ }
+ $self->die('YAML_PARSE_ERR_INDENTATION')
+ if $self->indent - $offset > 1;
+}
+
+#==============================================================================
+# Utility subroutines.
+#==============================================================================
+
+# Printable characters for escapes
+my %unescapes =
+ (
+ z => "\x00", a => "\x07", t => "\x09",
+ n => "\x0a", v => "\x0b", f => "\x0c",
+ r => "\x0d", e => "\x1b", '\\' => '\\',
+ );
+
+# Transform all the backslash style escape characters to their literal meaning
+sub _unescape {
+ my $self = shift;
+ my ($node) = @_;
+ $node =~ s/\\([never\\fartz]|x([0-9a-fA-F]{2}))/
+ (length($1)>1)?pack("H2",$2):$unescapes{$1}/gex;
+ return $node;
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Loader - YAML class for loading Perl objects to YAML
+
+=head1 SYNOPSIS
+
+ use YAML::Loader;
+ my $loader = YAML::Loader->new;
+ my $hash = $loader->load(<<'...');
+ foo: bar
+ ...
+
+=head1 DESCRIPTION
+
+YAML::Loader is the module that YAML.pm used to deserialize YAML to Perl
+objects. It is fully object oriented and usable on its own.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
--- /dev/null
+package YAML::Loader::Base;
+use strict; use warnings;
+use YAML::Base; use base 'YAML::Base';
+
+field load_code => 0;
+
+field stream => '';
+field document => 0;
+field line => 0;
+field documents => [];
+field lines => [];
+field eos => 0;
+field done => 0;
+field anchor2node => {};
+field level => 0;
+field offset => [];
+field preface => '';
+field content => '';
+field indent => 0;
+field major_version => 0;
+field minor_version => 0;
+field inline => '';
+
+sub set_global_options {
+ my $self = shift;
+ $self->load_code($YAML::LoadCode || $YAML::UseCode)
+ if defined $YAML::LoadCode or defined $YAML::UseCode;
+}
+
+sub load {
+ die 'load() not implemented in this class.';
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Loader::Base - Base class for YAML Loader classes
+
+=head1 SYNOPSIS
+
+ package YAML::Loader::Something;
+ use YAML::Loader::Base -base;
+
+=head1 DESCRIPTION
+
+YAML::Loader::Base is a base class for creating YAML loader classes.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
--- /dev/null
+package YAML::Marshall;
+use strict; use warnings;
+use YAML::Node();
+
+sub import {
+ my $class = shift;
+ no strict 'refs';
+ my $package = caller;
+ unless (grep { $_ eq $class} @{$package . '::ISA'}) {
+ push @{$package . '::ISA'}, $class;
+ }
+
+ my $tag = shift;
+ if ($tag) {
+ no warnings 'once';
+ $YAML::TagClass->{$tag} = $package;
+ ${$package . "::YamlTag"} = $tag;
+ }
+}
+
+sub yaml_dump {
+ my $self = shift;
+ no strict 'refs';
+ my $tag = ${ref($self) . "::YamlTag"} || 'perl/' . ref($self);
+ $self->yaml_node($self, $tag);
+}
+
+sub yaml_load {
+ my ($class, $node) = @_;
+ if (my $ynode = $class->yaml_ynode($node)) {
+ $node = $ynode->{NODE};
+ }
+ bless $node, $class;
+}
+
+sub yaml_node {
+ shift;
+ YAML::Node->new(@_);
+}
+
+sub yaml_ynode {
+ shift;
+ YAML::Node::ynode(@_);
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Marshall - YAML marshalling class you can mixin to your classes
+
+=head1 SYNOPSIS
+
+ package Bar;
+ use Foo -base;
+ use YAML::Marshall -mixin;
+
+=head1 DESCRIPTION
+
+For classes that want to handle their own YAML serialization.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
--- /dev/null
+package YAML::Node;
+use strict; use warnings;
+use YAML::Base; use base 'YAML::Base';
+use YAML::Tag;
+
+our @EXPORT = qw(ynode);
+
+sub ynode {
+ my $self;
+ if (ref($_[0]) eq 'HASH') {
+ $self = tied(%{$_[0]});
+ }
+ elsif (ref($_[0]) eq 'ARRAY') {
+ $self = tied(@{$_[0]});
+ }
+ else {
+ $self = tied($_[0]);
+ }
+ return (ref($self) =~ /^yaml_/) ? $self : undef;
+}
+
+sub new {
+ my ($class, $node, $tag) = @_;
+ my $self;
+ $self->{NODE} = $node;
+ my (undef, $type) = $class->node_info($node);
+ $self->{KIND} = (not defined $type) ? 'scalar' :
+ ($type eq 'ARRAY') ? 'sequence' :
+ ($type eq 'HASH') ? 'mapping' :
+ $class->die("Can't create YAML::Node from '$type'");
+ tag($self, ($tag || ''));
+ if ($self->{KIND} eq 'scalar') {
+ yaml_scalar->new($self, $_[1]);
+ return \ $_[1];
+ }
+ my $package = "yaml_" . $self->{KIND};
+ $package->new($self)
+}
+
+sub node { $_->{NODE} }
+sub kind { $_->{KIND} }
+sub tag {
+ my ($self, $value) = @_;
+ if (defined $value) {
+ $self->{TAG} = YAML::Tag->new($value);
+ return $self;
+ }
+ else {
+ return $self->{TAG};
+ }
+}
+sub keys {
+ my ($self, $value) = @_;
+ if (defined $value) {
+ $self->{KEYS} = $value;
+ return $self;
+ }
+ else {
+ return $self->{KEYS};
+ }
+}
+
+#==============================================================================
+package yaml_scalar;
+@yaml_scalar::ISA = qw(YAML::Node);
+
+sub new {
+ my ($class, $self) = @_;
+ tie $_[2], $class, $self;
+}
+
+sub TIESCALAR {
+ my ($class, $self) = @_;
+ bless $self, $class;
+ $self
+}
+
+sub FETCH {
+ my ($self) = @_;
+ $self->{NODE}
+}
+
+sub STORE {
+ my ($self, $value) = @_;
+ $self->{NODE} = $value
+}
+
+#==============================================================================
+package yaml_sequence;
+@yaml_sequence::ISA = qw(YAML::Node);
+
+sub new {
+ my ($class, $self) = @_;
+ my $new;
+ tie @$new, $class, $self;
+ $new
+}
+
+sub TIEARRAY {
+ my ($class, $self) = @_;
+ bless $self, $class
+}
+
+sub FETCHSIZE {
+ my ($self) = @_;
+ scalar @{$self->{NODE}};
+}
+
+sub FETCH {
+ my ($self, $index) = @_;
+ $self->{NODE}[$index]
+}
+
+sub STORE {
+ my ($self, $index, $value) = @_;
+ $self->{NODE}[$index] = $value
+}
+
+sub undone {
+ die "Not implemented yet"; # XXX
+}
+
+*STORESIZE = *POP = *PUSH = *SHIFT = *UNSHIFT = *SPLICE = *DELETE = *EXISTS =
+*STORESIZE = *POP = *PUSH = *SHIFT = *UNSHIFT = *SPLICE = *DELETE = *EXISTS =
+*undone; # XXX Must implement before release
+
+#==============================================================================
+package yaml_mapping;
+@yaml_mapping::ISA = qw(YAML::Node);
+
+sub new {
+ my ($class, $self) = @_;
+ @{$self->{KEYS}} = sort keys %{$self->{NODE}};
+ my $new;
+ tie %$new, $class, $self;
+ $new
+}
+
+sub TIEHASH {
+ my ($class, $self) = @_;
+ bless $self, $class
+}
+
+sub FETCH {
+ my ($self, $key) = @_;
+ if (exists $self->{NODE}{$key}) {
+ return (grep {$_ eq $key} @{$self->{KEYS}})
+ ? $self->{NODE}{$key} : undef;
+ }
+ return $self->{HASH}{$key};
+}
+
+sub STORE {
+ my ($self, $key, $value) = @_;
+ if (exists $self->{NODE}{$key}) {
+ $self->{NODE}{$key} = $value;
+ }
+ elsif (exists $self->{HASH}{$key}) {
+ $self->{HASH}{$key} = $value;
+ }
+ else {
+ if (not grep {$_ eq $key} @{$self->{KEYS}}) {
+ push(@{$self->{KEYS}}, $key);
+ }
+ $self->{HASH}{$key} = $value;
+ }
+ $value
+}
+
+sub DELETE {
+ my ($self, $key) = @_;
+ my $return;
+ if (exists $self->{NODE}{$key}) {
+ $return = $self->{NODE}{$key};
+ }
+ elsif (exists $self->{HASH}{$key}) {
+ $return = delete $self->{NODE}{$key};
+ }
+ for (my $i = 0; $i < @{$self->{KEYS}}; $i++) {
+ if ($self->{KEYS}[$i] eq $key) {
+ splice(@{$self->{KEYS}}, $i, 1);
+ }
+ }
+ return $return;
+}
+
+sub CLEAR {
+ my ($self) = @_;
+ @{$self->{KEYS}} = ();
+ %{$self->{HASH}} = ();
+}
+
+sub FIRSTKEY {
+ my ($self) = @_;
+ $self->{ITER} = 0;
+ $self->{KEYS}[0]
+}
+
+sub NEXTKEY {
+ my ($self) = @_;
+ $self->{KEYS}[++$self->{ITER}]
+}
+
+sub EXISTS {
+ my ($self, $key) = @_;
+ exists $self->{NODE}{$key}
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Node - A generic data node that encapsulates YAML information
+
+=head1 SYNOPSIS
+
+ use YAML;
+ use YAML::Node;
+
+ my $ynode = YAML::Node->new({}, 'ingerson.com/fruit');
+ %$ynode = qw(orange orange apple red grape green);
+ print Dump $ynode;
+
+yields:
+
+ --- !ingerson.com/fruit
+ orange: orange
+ apple: red
+ grape: green
+
+=head1 DESCRIPTION
+
+A generic node in YAML is similar to a plain hash, array, or scalar node
+in Perl except that it must also keep track of its type. The type is a
+URI called the YAML type tag.
+
+YAML::Node is a class for generating and manipulating these containers.
+A YAML node (or ynode) is a tied hash, array or scalar. In most ways it
+behaves just like the plain thing. But you can assign and retrieve and
+YAML type tag URI to it. For the hash flavor, you can also assign the
+order that the keys will be retrieved in. By default a ynode will offer
+its keys in the same order that they were assigned.
+
+YAML::Node has a class method call new() that will return a ynode. You
+pass it a regular node and an optional type tag. After that you can
+use it like a normal Perl node, but when you YAML::Dump it, the magical
+properties will be honored.
+
+This is how you can control the sort order of hash keys during a YAML
+serialization. By default, YAML sorts keys alphabetically. But notice
+in the above example that the keys were Dumped in the same order they
+were assigned.
+
+YAML::Node exports a function called ynode(). This function returns the tied object so that you can call special methods on it like ->keys().
+
+keys() works like this:
+
+ use YAML;
+ use YAML::Node;
+
+ %$node = qw(orange orange apple red grape green);
+ $ynode = YAML::Node->new($node);
+ ynode($ynode)->keys(['grape', 'apple']);
+ print Dump $ynode;
+
+produces:
+
+ ---
+ grape: green
+ apple: red
+
+It tells the ynode which keys and what order to use.
+
+ynodes will play a very important role in how programs use YAML. They
+are the foundation of how a Perl class can marshall the Loading and
+Dumping of its objects.
+
+The upcoming versions of YAML.pm will have much more information on this.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+Copyright (c) 2002. Brian Ingerson. All rights reserved.
+
+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
--- /dev/null
+package YAML::Tag;
+use strict; use warnings;
+
+use overload '""' => sub { ${$_[0]} };
+
+sub new {
+ my ($class, $self) = @_;
+ bless \$self, $class
+}
+
+sub short {
+ ${$_[0]}
+}
+
+sub canonical {
+ ${$_[0]}
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Tag - Tag URI object class for YAML
+
+=head1 SYNOPSIS
+
+ use YAML::Tag;
+
+=head1 DESCRIPTION
+
+Used by YAML::Node.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
--- /dev/null
+package YAML::Types;
+use strict; use warnings;
+use YAML::Base; use base 'YAML::Base';
+use YAML::Node;
+
+# XXX These classes and their APIs could still use some refactoring,
+# but at least they work for now.
+#-------------------------------------------------------------------------------
+package YAML::Type::blessed;
+use YAML::Base; # XXX
+sub yaml_dump {
+ my $self = shift;
+ my ($value) = @_;
+ my ($class, $type) = YAML::Base->node_info($value);
+ no strict 'refs';
+ my $kind = lc($type) . ':';
+ my $tag = ${$class . '::ClassTag'} ||
+ "!perl/$kind$class";
+ if ($type eq 'REF') {
+ YAML::Node->new(
+ {(&YAML::VALUE, ${$_[0]})}, $tag
+ );
+ }
+ elsif ($type eq 'SCALAR') {
+ $_[1] = $$value;
+ YAML::Node->new($_[1], $tag);
+ } else {
+ YAML::Node->new($value, $tag);
+ }
+}
+
+#-------------------------------------------------------------------------------
+package YAML::Type::undef;
+sub yaml_dump {
+ my $self = shift;
+}
+
+sub yaml_load {
+ my $self = shift;
+}
+
+#-------------------------------------------------------------------------------
+package YAML::Type::glob;
+sub yaml_dump {
+ my $self = shift;
+ my $ynode = YAML::Node->new({}, '!perl/glob:');
+ for my $type (qw(PACKAGE NAME SCALAR ARRAY HASH CODE IO)) {
+ my $value = *{$_[0]}{$type};
+ $value = $$value if $type eq 'SCALAR';
+ if (defined $value) {
+ if ($type eq 'IO') {
+ my @stats = qw(device inode mode links uid gid rdev size
+ atime mtime ctime blksize blocks);
+ undef $value;
+ $value->{stat} = YAML::Node->new({});
+ map {$value->{stat}{shift @stats} = $_} stat(*{$_[0]});
+ $value->{fileno} = fileno(*{$_[0]});
+ {
+ local $^W;
+ $value->{tell} = tell(*{$_[0]});
+ }
+ }
+ $ynode->{$type} = $value;
+ }
+ }
+ return $ynode;
+}
+
+sub yaml_load {
+ my $self = shift;
+ my ($node, $class, $loader) = @_;
+ my ($name, $package);
+ if (defined $node->{NAME}) {
+ $name = $node->{NAME};
+ delete $node->{NAME};
+ }
+ else {
+ $loader->warn('YAML_LOAD_WARN_GLOB_NAME');
+ return undef;
+ }
+ if (defined $node->{PACKAGE}) {
+ $package = $node->{PACKAGE};
+ delete $node->{PACKAGE};
+ }
+ else {
+ $package = 'main';
+ }
+ no strict 'refs';
+ if (exists $node->{SCALAR}) {
+ *{"${package}::$name"} = \$node->{SCALAR};
+ delete $node->{SCALAR};
+ }
+ for my $elem (qw(ARRAY HASH CODE IO)) {
+ if (exists $node->{$elem}) {
+ if ($elem eq 'IO') {
+ $loader->warn('YAML_LOAD_WARN_GLOB_IO');
+ delete $node->{IO};
+ next;
+ }
+ *{"${package}::$name"} = $node->{$elem};
+ delete $node->{$elem};
+ }
+ }
+ for my $elem (sort keys %$node) {
+ $loader->warn('YAML_LOAD_WARN_BAD_GLOB_ELEM', $elem);
+ }
+ return *{"${package}::$name"};
+}
+
+#-------------------------------------------------------------------------------
+package YAML::Type::code;
+my $dummy_warned = 0;
+my $default = '{ "DUMMY" }';
+sub yaml_dump {
+ my $self = shift;
+ my $code;
+ my ($dumpflag, $value) = @_;
+ my ($class, $type) = YAML::Base->node_info($value);
+ $class ||= '';
+ my $tag = "!perl/code:$class";
+ if (not $dumpflag) {
+ $code = $default;
+ }
+ else {
+ bless $value, "CODE" if $class;
+ eval { use B::Deparse };
+ return if $@;
+ my $deparse = B::Deparse->new();
+ eval {
+ local $^W = 0;
+ $code = $deparse->coderef2text($value);
+ };
+ if ($@) {
+ warn YAML::YAML_DUMP_WARN_DEPARSE_FAILED() if $^W;
+ $code = $default;
+ }
+ bless $value, $class if $class;
+ chomp $code;
+ $code .= "\n";
+ }
+ $_[2] = $code;
+ YAML::Node->new($_[2], $tag);
+}
+
+sub yaml_load {
+ my $self = shift;
+ my ($node, $class, $loader) = @_;
+ if ($loader->load_code) {
+ my $code = eval "package main; sub $node";
+ if ($@) {
+ $loader->warn('YAML_LOAD_WARN_PARSE_CODE', $@);
+ return sub {};
+ }
+ else {
+ CORE::bless $code, $class if $class;
+ return $code;
+ }
+ }
+ else {
+ return sub {};
+ }
+}
+
+#-------------------------------------------------------------------------------
+package YAML::Type::ref;
+sub yaml_dump {
+ my $self = shift;
+ YAML::Node->new({(&YAML::VALUE, ${$_[0]})}, '!perl/ref:')
+}
+
+sub yaml_load {
+ my $self = shift;
+ my ($node, $class, $loader) = @_;
+ $loader->die('YAML_LOAD_ERR_NO_DEFAULT_VALUE', 'ptr')
+ unless exists $node->{&YAML::VALUE};
+ return \$node->{&YAML::VALUE};
+}
+
+#-------------------------------------------------------------------------------
+package YAML::Type::regexp;
+# XXX Be sure to handle blessed regexps (if possible)
+sub yaml_dump {
+ my $self = shift;
+ my ($node, $class, $dumper) = @_;
+ my ($regexp, $modifiers);
+ if ("$node" =~ /^\(\?(\w*)(?:\-\w+)?\:(.*)\)$/) {
+ $regexp = $2;
+ $modifiers = $1 || '';
+ }
+ else {
+ $dumper->die('YAML_DUMP_ERR_BAD_REGEXP', $node);
+ }
+ my $tag = '!perl/regexp:';
+ $tag .= $class if $class;
+ my $ynode = YAML::Node->new({}, $tag);
+ $ynode->{REGEXP} = $regexp;
+ $ynode->{MODIFIERS} = $modifiers if $modifiers;
+ return $ynode;
+}
+
+sub yaml_load {
+ my $self = shift;
+ my ($node, $class, $loader) = @_;
+ my ($regexp, $modifiers);
+ if (defined $node->{REGEXP}) {
+ $regexp = $node->{REGEXP};
+ delete $node->{REGEXP};
+ }
+ else {
+ $loader->warn('YAML_LOAD_WARN_NO_REGEXP_IN_REGEXP');
+ return undef;
+ }
+ if (defined $node->{MODIFIERS}) {
+ $modifiers = $node->{MODIFIERS};
+ delete $node->{MODIFIERS};
+ }
+ else {
+ $modifiers = '';
+ }
+ for my $elem (sort keys %$node) {
+ $loader->warn('YAML_LOAD_WARN_BAD_REGEXP_ELEM', $elem);
+ }
+ my $qr = $regexp;
+ $qr = "(?$modifiers:$qr)";
+ return qr{$qr};
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+YAML::Transfer - Marshall Perl internal data types to/from YAML
+
+=head1 SYNOPSIS
+
+ $::foo = 42;
+ print YAML::Dump(*::foo);
+
+ print YAML::Dump(qr{match me});
+
+=head1 DESCRIPTION
+
+This module has the helper classes for transferring objects,
+subroutines, references, globs, regexps and file handles to and
+from YAML.
+
+=head1 AUTHOR
+
+Ingy döt Net <ingy@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2006. Ingy döt Net. All rights reserved.
+
+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
exit(1);
}
- push(@INC, "modules");
+ unshift @INC, "modules/YAML"; # Use our own version of YAML.
+ push @INC, "modules"; # Only use our own versions of modules if there's no system version.
}
use English '-no_match_vars';
#!/usr/bin/perl -w
BEGIN {
- push(@INC, "modules");
+ unshift @INC, "modules/YAML"; # Use our own version of YAML.
+ push @INC, "modules"; # Only use our own versions of modules if there's no system version.
}
use SL::InstallationCheck;
#!/usr/bin/perl
BEGIN {
- push(@INC, "modules");
+ unshift @INC, "modules/YAML"; # Use our own version of YAML.
+ push @INC, "modules"; # Only use our own versions of modules if there's no system version.
}
use DBI;
projects / kivitendo-erp.git / commitdiff