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Pod::Simple(3)		       User Contributed Perl Documentation		   Pod::Simple(3)

NAME
       Pod::Simple - framework for parsing Pod

SYNOPSIS
	TODO

DESCRIPTION
       Pod::Simple is a Perl library for parsing text in the Pod ("plain old documentation")
       markup language that is typically used for writing documentation for Perl and for Perl
       modules. The Pod format is explained perlpod; the most common formatter is called
       "perldoc".

       Be sure to read "ENCODING" if your Pod contains non-ASCII characters.

       Pod formatters can use Pod::Simple to parse Pod documents and render them into plain text,
       HTML, or any number of other formats. Typically, such formatters will be subclasses of
       Pod::Simple, and so they will inherit its methods, like "parse_file".

       If you're reading this document just because you have a Pod-processing subclass that you
       want to use, this document (plus the documentation for the subclass) is probably all you
       need to read.

       If you're reading this document because you want to write a formatter subclass, continue
       reading it and then read Pod::Simple::Subclassing, and then possibly even read perlpodspec
       (some of which is for parser-writers, but much of which is notes to formatter-writers).

MAIN METHODS
       "$parser = SomeClass->new();"
	   This returns a new parser object, where "SomeClass" is a subclass of Pod::Simple.

       "$parser->output_fh( *OUT );"
	   This sets the filehandle that $parser's output will be written to.  You can pass
	   *STDOUT, otherwise you should probably do something like this:

	       my $outfile = "output.txt";
	       open TXTOUT, ">$outfile" or die "Can't write to $outfile: $!";
	       $parser->output_fh(*TXTOUT);

	   ...before you call one of the "$parser->parse_whatever" methods.

       "$parser->output_string( \$somestring );"
	   This sets the string that $parser's output will be sent to, instead of any filehandle.

       "$parser->parse_file( $some_filename );"
       "$parser->parse_file( *INPUT_FH );"
	   This reads the Pod content of the file (or filehandle) that you specify, and processes
	   it with that $parser object, according to however $parser's class works, and according
	   to whatever parser options you have set up for this $parser object.

       "$parser->parse_string_document( $all_content );"
	   This works just like "parse_file" except that it reads the Pod content not from a
	   file, but from a string that you have already in memory.

       "$parser->parse_lines( ...@lines..., undef );"
	   This processes the lines in @lines (where each list item must be a defined value, and
	   must contain exactly one line of content -- so no items like "foo\nbar" are allowed).
	   The final "undef" is used to indicate the end of document being parsed.

	   The other "parser_whatever" methods are meant to be called only once per $parser
	   object; but "parse_lines" can be called as many times per $parser object as you want,
	   as long as the last call (and only the last call) ends with an "undef" value.

       "$parser->content_seen"
	   This returns true only if there has been any real content seen for this document.
	   Returns false in cases where the document contains content, but does not make use of
	   any Pod markup.

       "SomeClass->filter( $filename );"
       "SomeClass->filter( *INPUT_FH );"
       "SomeClass->filter( \$document_content );"
	   This is a shortcut method for creating a new parser object, setting the output handle
	   to STDOUT, and then processing the specified file (or filehandle, or in-memory
	   document). This is handy for one-liners like this:

	     perl -MPod::Simple::Text -e "Pod::Simple::Text->filter('thingy.pod')"

SECONDARY METHODS
       Some of these methods might be of interest to general users, as well as of interest to
       formatter-writers.

       Note that the general pattern here is that the accessor-methods read the attribute's value
       with "$value = $parser->attribute" and set the attribute's value with
       "$parser->attribute(newvalue)".	For each accessor, I typically only mention one syntax or
       another, based on which I think you are actually most likely to use.

       "$parser->parse_characters( SOMEVALUE )"
	   The Pod parser normally expects to read octets and to convert those octets to
	   characters based on the "=encoding" declaration in the Pod source.  Set this option to
	   a true value to indicate that the Pod source is already a Perl character stream.  This
	   tells the parser to ignore any "=encoding" command and to skip all the code paths
	   involving decoding octets.

       "$parser->no_whining( SOMEVALUE )"
	   If you set this attribute to a true value, you will suppress the parser's complaints
	   about irregularities in the Pod coding. By default, this attribute's value is false,
	   meaning that irregularities will be reported.

	   Note that turning this attribute to true won't suppress one or two kinds of complaints
	   about rarely occurring unrecoverable errors.

       "$parser->no_errata_section( SOMEVALUE )"
	   If you set this attribute to a true value, you will stop the parser from generating a
	   "POD ERRORS" section at the end of the document. By default, this attribute's value is
	   false, meaning that an errata section will be generated, as necessary.

       "$parser->complain_stderr( SOMEVALUE )"
	   If you set this attribute to a true value, it will send reports of parsing errors to
	   STDERR. By default, this attribute's value is false, meaning that no output is sent to
	   STDERR.

	   Setting "complain_stderr" also sets "no_errata_section".

       "$parser->source_filename"
	   This returns the filename that this parser object was set to read from.

       "$parser->doc_has_started"
	   This returns true if $parser has read from a source, and has seen Pod content in it.

       "$parser->source_dead"
	   This returns true if $parser has read from a source, and come to the end of that
	   source.

       "$parser->strip_verbatim_indent( SOMEVALUE )"
	   The perlpod spec for a Verbatim paragraph is "It should be reproduced exactly...",
	   which means that the whitespace you've used to indent your verbatim blocks will be
	   preserved in the output. This can be annoying for outputs such as HTML, where that
	   whitespace will remain in front of every line. It's an unfortunate case where syntax
	   is turned into semantics.

	   If the POD your parsing adheres to a consistent indentation policy, you can have such
	   indentation stripped from the beginning of every line of your verbatim blocks. This
	   method tells Pod::Simple what to strip. For two-space indents, you'd use:

	     $parser->strip_verbatim_indent('  ');

	   For tab indents, you'd use a tab character:

	     $parser->strip_verbatim_indent("\t");

	   If the POD is inconsistent about the indentation of verbatim blocks, but you have
	   figured out a heuristic to determine how much a particular verbatim block is indented,
	   you can pass a code reference instead. The code reference will be executed with one
	   argument, an array reference of all the lines in the verbatim block, and should return
	   the value to be stripped from each line. For example, if you decide that you're fine
	   to use the first line of the verbatim block to set the standard for indentation of the
	   rest of the block, you can look at the first line and return the appropriate value,
	   like so:

	     $new->strip_verbatim_indent(sub {
		 my $lines = shift;
		 (my $indent = $lines->[0]) =~ s/\S.*//;
		 return $indent;
	     });

	   If you'd rather treat each line individually, you can do that, too, by just
	   transforming them in-place in the code reference and returning "undef". Say that you
	   don't want any lines indented. You can do something like this:

	     $new->strip_verbatim_indent(sub {
		 my $lines = shift;
		 sub { s/^\s+// for @{ $lines },
		 return undef;
	     });

TERTIARY METHODS
       "$parser->abandon_output_fh()"
	   Cancel output to the file handle. Any POD read by the $parser is not effected.

       "$parser->abandon_output_string()"
	   Cancel output to the output string. Any POD read by the $parser is not effected.

       "$parser->accept_code( @codes )"
	   Alias for accept_codes.

       "$parser->accept_codes( @codes )"
	   Allows $parser to accept a list of "Formatting Codes" in perlpod. This can be used to
	   implement user-defined codes.

       "$parser->accept_directive_as_data( @directives )"
	   Allows $parser to accept a list of directives for data paragraphs. A directive is the
	   label of a "Command Paragraph" in perlpod. A data paragraph is one delimited by
	   "=begin/=for/=end" directives. This can be used to implement user-defined directives.

       "$parser->accept_directive_as_processed( @directives )"
	   Allows $parser to accept a list of directives for processed paragraphs. A directive is
	   the label of a "Command Paragraph" in perlpod. A processed paragraph is also known as
	   "Ordinary Paragraph" in perlpod. This can be used to implement user-defined
	   directives.

       "$parser->accept_directive_as_verbatim( @directives )"
	   Allows $parser to accept a list of directives for "Verbatim Paragraph" in perlpod. A
	   directive is the label of a "Command Paragraph" in perlpod. This can be used to
	   implement user-defined directives.

       "$parser->accept_target( @targets )"
	   Alias for accept_targets.

       "$parser->accept_target_as_text( @targets )"
	   Alias for accept_targets_as_text.

       "$parser->accept_targets( @targets )"
	   Accepts targets for "=begin/=for/=end" sections of the POD.

       "$parser->accept_targets_as_text( @targets )"
	   Accepts targets for "=begin/=for/=end" sections that should be parsed as POD. For
	   details, see "About Data Paragraphs" in perlpodspec.

       "$parser->any_errata_seen()"
	   Used to check if any errata was seen.

	   Example:

	     die "too many errors\n" if $parser->any_errata_seen();

       "$parser->detected_encoding()"
	   Return the encoding corresponding to "=encoding", but only if the encoding was
	   recognized and handled.

       "$parser->encoding()"
	   Return encoding of the document, even if the encoding is not correctly handled.

       "$parser->parse_from_file( $source, $to )"
	   Parses from $source file to $to file. Similar to "parse_from_file" in Pod::Parser.

       "$parser->scream( @error_messages )"
	   Log an error that can't be ignored.

       "$parser->unaccept_code( @codes )"
	   Alias for unaccept_codes.

       "$parser->unaccept_codes( @codes )"
	   Removes @codes as valid codes for the parse.

       "$parser->unaccept_directive( @directives )"
	   Alias for unaccept_directives.

       "$parser->unaccept_directives( @directives )"
	   Removes @directives as valid directives for the parse.

       "$parser->unaccept_target( @targets )"
	   Alias for unaccept_targets.

       "$parser->unaccept_targets( @targets )"
	   Removes @targets as valid targets for the parse.

       "$parser->version_report()"
	   Returns a string describing the version.

       "$parser->whine( @error_messages )"
	   Log an error unless "$parser->no_whining( TRUE );".

ENCODING
       The Pod::Simple parser expects to read octets.  The parser will decode the octets into
       Perl's internal character string representation using the value of the "=encoding"
       declaration in the POD source.

       If the POD source does not include an "=encoding" declaration, the parser will attempt to
       guess the encoding (selecting one of UTF-8 or Latin-1) by examining the first non-ASCII
       bytes and applying the heuristic described in perlpodspec.

       If you set the "parse_characters" option to a true value the parser will expect characters
       rather than octets; will ignore any "=encoding"; and will make no attempt to decode the
       input.

CAVEATS
       This is just a beta release -- there are a good number of things still left to do.
       Notably, support for EBCDIC platforms is still half-done, an untested.

SEE ALSO
       Pod::Simple::Subclassing

       perlpod

       perlpodspec

       Pod::Escapes

       perldoc

SUPPORT
       Questions or discussion about POD and Pod::Simple should be sent to the
       pod-people@perl.org mail list. Send an empty email to pod-people-subscribe@perl.org to
       subscribe.

       This module is managed in an open GitHub repository,
       <https://github.com/theory/pod-simple/>. Feel free to fork and contribute, or to clone
       <git://github.com/theory/pod-simple.git> and send patches!

       Patches against Pod::Simple are welcome. Please send bug reports to
       <bug-pod-simple@rt.cpan.org>.

COPYRIGHT AND DISCLAIMERS
       Copyright (c) 2002 Sean M. Burke.

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.

       This program is distributed in the hope that it will be useful, but without any warranty;
       without even the implied warranty of merchantability or fitness for a particular purpose.

AUTHOR
       Pod::Simple was created by Sean M. Burke <sburke@cpan.org>.  But don't bother him, he's
       retired.

       Pod::Simple is maintained by:

       o   Allison Randal "allison@perl.org"

       o   Hans Dieter Pearcey "hdp@cpan.org"

       o   David E. Wheeler "dwheeler@cpan.org"

       Documentation has been contributed by:

       o   Gabor Szabo "szabgab@gmail.com"

       o   Shawn H Corey  "SHCOREY at cpan.org"

perl v5.16.3				    2013-05-02				   Pod::Simple(3)
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