Edit File: JSON::Syck.3pm
.\" Automatically generated by Pod::Man 2.22 (Pod::Simple 3.13) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is turned on, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .ie \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . nr % 0 . rr F .\} .el \{\ . de IX .. .\} .\" ======================================================================== .\" .IX Title "JSON::Syck 3" .TH JSON::Syck 3 "2017-04-19" "perl v5.10.1" "User Contributed Perl Documentation" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" JSON::Syck \- JSON is YAML (but consider using \s-1JSON::XS\s0 instead!) .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& use JSON::Syck; # no exports by default \& \& my $data = JSON::Syck::Load($json); \& my $json = JSON::Syck::Dump($data); \& \& # $file can be an IO object, or a filename \& my $data = JSON::Syck::LoadFile($file); \& JSON::Syck::DumpFile($file, $data); \& \& # Dump into a pre\-existing buffer \& my $json; \& JSON::Syck::DumpInto(\e$json, $data); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" JSON::Syck is a syck implementation of \s-1JSON\s0 parsing and generation. Because \&\s-1JSON\s0 is \s-1YAML\s0 (<http://redhanded.hobix.com/inspect/yamlIsJson.html>), using syck gives you a fast and memory-efficient parser and dumper for \s-1JSON\s0 data representation. .PP However, a newer module \s-1JSON::XS\s0, has since emerged. It is more flexible, efficient and robust, so please consider using it instead of this module. .SH "DIFFERENCE WITH JSON" .IX Header "DIFFERENCE WITH JSON" You might want to know the difference between the \fI\s-1JSON\s0\fR module and this one. .PP Since \s-1JSON\s0 is a pure-perl module and JSON::Syck is based on libsyck, JSON::Syck is supposed to be very fast and memory efficient. See chansen's benchmark table at <http://idisk.mac.com/christian.hansen/Public/perl/serialize.pl> .PP \&\s-1JSON\s0.pm comes with dozens of ways to do the same thing and lots of options, while JSON::Syck doesn't. There's only \f(CW\*(C`Load\*(C'\fR and \f(CW\*(C`Dump\*(C'\fR. .PP Oh, and JSON::Syck doesn't use camelCase method names :\-) .SH "REFERENCES" .IX Header "REFERENCES" .SS "\s-1SCALAR\s0 \s-1REFERENCE\s0" .IX Subsection "SCALAR REFERENCE" For now, when you pass a scalar reference to JSON::Syck, it dereferences to get the actual scalar value. .PP JSON::Syck raises an exception when you pass in circular references. .PP If you want to serialize self referencing stuff, you should use \&\s-1YAML\s0 which supports it. .SS "\s-1SUBROUTINE\s0 \s-1REFERENCE\s0" .IX Subsection "SUBROUTINE REFERENCE" When you pass subroutine reference, JSON::Syck dumps it as null. .SH "UTF\-8 FLAGS" .IX Header "UTF-8 FLAGS" By default this module doesn't touch any of utf\-8 flags set in strings, and assumes \s-1UTF\-8\s0 bytes to be passed and emit. .PP However, when you set \f(CW$JSON::Syck::ImplicitUnicode\fR to 1, this module properly decodes \s-1UTF\-8\s0 binaries and sets \s-1UTF\-8\s0 flag everywhere, as in: .PP .Vb 4 \& JSON (UTF\-8 bytes) => Perl (UTF\-8 flagged) \& JSON (UTF\-8 flagged) => Perl (UTF\-8 flagged) \& Perl (UTF\-8 bytes) => JSON (UTF\-8 flagged) \& Perl (UTF\-8 flagged) => JSON (UTF\-8 flagged) .Ve .PP By default, JSON::Syck::Dump will only transverse up to 512 levels of a datastructure in order to avoid an infinite loop when it is presented with an circular reference. .PP However, you set \f(CW$JSON::Syck::MaxLevels\fR to a larger value if you have very complex structures. .PP Unfortunately, there's no implicit way to dump Perl \s-1UTF\-8\s0 flagged data structure to utf\-8 encoded \s-1JSON\s0. To do this, simply use Encode module, e.g.: .PP .Vb 2 \& use Encode; \& use JSON::Syck qw(Dump); \& \& my $json = encode_utf8( Dump($data) ); .Ve .PP Alternatively you can use Encode::JavaScript::UCS to encode Unicode strings as in \fI\f(CI%uXXXX\fI\fR form. .PP .Vb 3 \& use Encode; \& use Encode::JavaScript::UCS; \& use JSON::Syck qw(Dump); \& \& my $json_unicode_escaped = encode( \*(AqJavaScript\-UCS\*(Aq, Dump($data) ); .Ve .SH "QUOTING" .IX Header "QUOTING" According to the \s-1JSON\s0 specification, all \s-1JSON\s0 strings are to be double-quoted. However, when embedding JavaScript in \s-1HTML\s0 attributes, it may be more convenient to use single quotes. .PP Set \f(CW$JSON::Syck::SingleQuote\fR to 1 will make both \f(CW\*(C`Dump\*(C'\fR and \f(CW\*(C`Load\*(C'\fR expect single-quoted string literals. .SH "BUGS" .IX Header "BUGS" Dumping into tied (or other magic variables) with \f(CW\*(C`DumpInto\*(C'\fR might not work properly in all cases. .PP When dumping with \f(CW\*(C`DumpFile\*(C'\fR, some spacing might be wrong and \&\f(CW$JSON::Syck::SingleQuote\fR might be handled incorrectly. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\s-1JSON::XS\s0, YAML::Syck .SH "AUTHORS" .IX Header "AUTHORS" Audrey Tang <cpan@audreyt.org> .PP Tatsuhiko Miyagawa <miyagawa@gmail.com> .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2005\-2009 by Audrey Tang <cpan@audreyt.org>. .PP This software is released under the \s-1MIT\s0 license cited below. .PP The \fIlibsyck\fR code bundled with this library is released by \&\*(L"why the lucky stiff\*(R", under a BSD-style license. See the \fI\s-1COPYING\s0\fR file for details. .ie n .SS "The ""\s-1MIT\s0"" License" .el .SS "The ``\s-1MIT\s0'' License" .IX Subsection "The MIT License" Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the \*(L"Software\*(R"), 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: .PP The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. .PP \&\s-1THE\s0 \s-1SOFTWARE\s0 \s-1IS\s0 \s-1PROVIDED\s0 \*(L"\s-1AS\s0 \s-1IS\s0\*(R", \s-1WITHOUT\s0 \s-1WARRANTY\s0 \s-1OF\s0 \s-1ANY\s0 \s-1KIND\s0, \s-1EXPRESS\s0 \&\s-1OR\s0 \s-1IMPLIED\s0, \s-1INCLUDING\s0 \s-1BUT\s0 \s-1NOT\s0 \s-1LIMITED\s0 \s-1TO\s0 \s-1THE\s0 \s-1WARRANTIES\s0 \s-1OF\s0 \s-1MERCHANTABILITY\s0, \&\s-1FITNESS\s0 \s-1FOR\s0 A \s-1PARTICULAR\s0 \s-1PURPOSE\s0 \s-1AND\s0 \s-1NONINFRINGEMENT\s0. \s-1IN\s0 \s-1NO\s0 \s-1EVENT\s0 \s-1SHALL\s0 \&\s-1THE\s0 \s-1AUTHORS\s0 \s-1OR\s0 \s-1COPYRIGHT\s0 \s-1HOLDERS\s0 \s-1BE\s0 \s-1LIABLE\s0 \s-1FOR\s0 \s-1ANY\s0 \s-1CLAIM\s0, \s-1DAMAGES\s0 \s-1OR\s0 \s-1OTHER\s0 \&\s-1LIABILITY\s0, \s-1WHETHER\s0 \s-1IN\s0 \s-1AN\s0 \s-1ACTION\s0 \s-1OF\s0 \s-1CONTRACT\s0, \s-1TORT\s0 \s-1OR\s0 \s-1OTHERWISE\s0, \s-1ARISING\s0 \&\s-1FROM\s0, \s-1OUT\s0 \s-1OF\s0 \s-1OR\s0 \s-1IN\s0 \s-1CONNECTION\s0 \s-1WITH\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1OR\s0 \s-1THE\s0 \s-1USE\s0 \s-1OR\s0 \s-1OTHER\s0 \&\s-1DEALINGS\s0 \s-1IN\s0 \s-1THE\s0 \s-1SOFTWARE\s0.
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