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YAML::Syck(3)                        User Contributed Perl Documentation                       YAML::Syck(3)



NAME
       YAML::Syck - Fast, lightweight YAML loader and dumper

SYNOPSIS
           use YAML::Syck;

           # Set this for interoperability with other YAML/Syck bindings:
           # e.g. Load('Yes') becomes 1 and Load('No') becomes ''.
           $YAML::Syck::ImplicitTyping = 1;

           $data = Load($yaml);
           $yaml = Dump($data);

           # $file can be an IO object, or a filename
           $data = LoadFile($file);
           DumpFile($file, $data);

           # A string with multiple YAML streams in it
           $yaml = Dump(@data);
           @data = Load($yaml);

           # Dumping into a pre-existing output buffer
           my $yaml;
           DumpInto(\$yaml, @data);

DESCRIPTION
       This module provides a Perl interface to the libsyck data serialization library.  It exports the
       "Dump" and "Load" functions for converting Perl data structures to YAML strings, and the other way
       around.

       NOTE: If you are working with other language's YAML/Syck bindings (such as Ruby), please set
       $YAML::Syck::ImplicitTyping to 1 before calling the "Load"/"Dump" functions.  The default setting is
       for preserving backward-compatibility with "YAML.pm".

Differences Between YAML::Syck and YAML
   Error handling
       Some calls are designed to die rather than returning YAML. You should wrap your calls in eval to
       assure you do not get unexpected results.

FLAGS
   $YAML::Syck::Headless
       Defaults to false.  Setting this to a true value will make "Dump" omit the leading "---\n" marker.

   $YAML::Syck::SortKeys
       Defaults to false.  Setting this to a true value will make "Dump" sort hash keys.

   $YAML::Syck::SingleQuote
       Defaults to false.  Setting this to a true value will make "Dump" always emit single quotes instead
       of bare strings.

   $YAML::Syck::ImplicitTyping
       Defaults to false.  Setting this to a true value will make "Load" recognize various implicit types in
       YAML, such as unquoted "true", "false", as well as integers and floating-point numbers.  Otherwise,
       only "~" is recognized to be "undef".

   $YAML::Syck::ImplicitUnicode
       Defaults to false.  For Perl 5.8.0 or later, setting this to a true value will make "Load" set
       Unicode flag on for every string that contains valid UTF8 sequences, and make "Dump" return a unicode
       string.

       Regardless of this flag, Unicode strings are dumped verbatim without escaping; byte strings with
       high-bit set will be dumped with backslash escaping.

       However, because YAML does not distinguish between these two kinds of strings, so this flag will
       affect loading of both variants of strings.

       If you want to use LoadFile or DumpFile with unicode, you are required to open your own file in order
       to assure it's UTF8 encoded:

         open(my $fh, ">:encoding(UTF-8)", "out.yml");
         DumpFile($fh, $hashref);

   $YAML::Syck::ImplicitBinary
       Defaults to false.  For Perl 5.8.0 or later, setting this to a true value will make "Dump" generate
       Base64-encoded "!!binary" data for all non-Unicode scalars containing high-bit bytes.

   $YAML::Syck::UseCode / $YAML::Syck::LoadCode / $YAML::Syck::DumpCode
       These flags control whether or not to try and eval/deparse perl source code; each of them defaults to
       false.

       Setting $YAML::Syck::UseCode to a true value is equivalent to setting both $YAML::Syck::LoadCode and
       $YAML::Syck::DumpCode to true.

   $YAML::Syck::LoadBlessed
       Defaults to true. Setting this to a false value will prevent "Load" from blessing tag names that do
       not begin with "!!perl" or "!perl"; see below.

BUGS
       Dumping Glob/IO values do not work yet.

       Dumping of Tied variables is unsupported.

       Dumping into tied (or other magic variables) with "DumpInto" might not work properly in all cases.

CAVEATS
       This module implements the YAML 1.0 spec.  To deal with data in YAML 1.1, please use the "YAML::XS"
       module instead.

       The current implementation bundles libsyck source code; if your system has a site-wide shared
       libsyck, it will not be used.

       Tag names such as "!!perl/hash:Foo" is blessed into the package "Foo", but the "!hs/foo" and
       "!!hs/Foo" tags are blessed into "hs::Foo".  Note that this holds true even if the tag contains non-word nonword
       word characters; for example, "!haskell.org/Foo" is blessed into "haskell.org::Foo".  Please use
       Class::Rebless to cast it into other user-defined packages. You can also set the LoadBlessed flag
       false to disable blessing tag names that do not begin with "!!perl" or "!perl".

       This module has a lot of known issues <https://rt.cpan.org/Public/Dist/Display.html?Name=YAML-Syck>
       and has only been semi-actively maintained since 2007. If you encounter an issue with it probably
       won't be fixed unless you offer up a patch <http://github.com/avar/YAML-Syck> in Git that's ready for
       release.

       There are still good reasons to use this module, such as better interoperability with other syck
       wrappers (like Ruby's), or some edge case of YAML's syntax that it handles better. It'll probably
       work perfectly for you, but if it doesn't you may want to look at YAML::XS, or perhaps at looking
       another serialization format like JSON.

SEE ALSO
       YAML, JSON::Syck

       <http://www.yaml.org/>

AUTHORS
       Audrey Tang <cpan@audreyt.org>

COPYRIGHT
       Copyright 2005-2009 by Audrey Tang <cpan@audreyt.org>.

       This software is released under the MIT license cited below.

       The libsyck code bundled with this library is released by "why the lucky stiff", under a BSD-style
       license.  See the COPYING file for details.

   The "MIT" License
       Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
       associated documentation files (the "Software"), to deal in the Software without restriction,
       including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
       and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
       subject to the following conditions:

       The above copyright notice and this permission notice shall be included in all copies or substantial
       portions of the Software.

       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
       LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
       IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
       LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
       WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.



perl v5.16.2                                     2012-09-20                                    YAML::Syck(3)