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Pod::Simple::Subclassing(3perl) Perl Programmers Reference Guide Pod::Simple::Subclassing(3perl)
NAME
Pod::Simple::Subclassing -- write a formatter as a Pod::Simple subclass
SYNOPSIS
package Pod::SomeFormatter;
use Pod::Simple;
@ISA = qw(Pod::Simple);
$VERSION = '1.01';
use strict;
sub _handle_element_start {
my($parser, $element_name, $attr_hash_r) = @_;
...
}
sub _handle_element_end {
my($parser, $element_name, $attr_hash_r) = @_;
# NOTE: $attr_hash_r is only present when $element_name is "over" or "begin"
# The remaining code excerpts will mostly ignore this $attr_hash_r, as it is
# mostly useless. It is documented where "over-*" and "begin" events are
# documented.
...
}
sub _handle_text {
my($parser, $text) = @_;
...
}
1;
DESCRIPTION
This document is about using Pod::Simple to write a Pod processor, generally a Pod
formatter. If you just want to know about using an existing Pod formatter, instead see its
documentation and see also the docs in Pod::Simple.
The zeroeth step in writing a Pod formatter is to make sure that there isn't already a
decent one in CPAN. See <http://search.cpan.org/>, and run a search on the name of the
format you want to render to. Also consider joining the Pod People list
<http://lists.perl.org/showlist.cgi?name=pod-people> and asking whether anyone has a
formatter for that format -- maybe someone cobbled one together but just hasn't released
it.
The first step in writing a Pod processor is to read perlpodspec, which contains
information on writing a Pod parser (which has been largely taken care of by Pod::Simple),
but also a lot of requirements and recommendations for writing a formatter.
The second step is to actually learn the format you're planning to format to -- or at
least as much as you need to know to represent Pod, which probably isn't much.
The third step is to pick which of Pod::Simple's interfaces you want to use:
Pod::Simple
The basic Pod::Simple interface that uses "_handle_element_start()",
"_handle_element_end()" and "_handle_text()".
Pod::Simple::Methody
The Pod::Simple::Methody interface is event-based, similar to that of HTML::Parser or
XML::Parser's "Handlers".
Pod::Simple::PullParser
Pod::Simple::PullParser provides a token-stream interface, sort of like
HTML::TokeParser's interface.
Pod::Simple::SimpleTree
Pod::Simple::SimpleTree provides a simple tree interface, rather like XML::Parser's
"Tree" interface. Users familiar with XML handling will be comfortable with this
interface. Users interested in outputting XML, should look into the modules that
produce an XML representation of the Pod stream, notably Pod::Simple::XMLOutStream;
you can feed the output of such a class to whatever XML parsing system you are most at
home with.
The last step is to write your code based on how the events (or tokens, or tree-nodes, or
the XML, or however you're parsing) will map to constructs in the output format. Also be
sure to consider how to escape text nodes containing arbitrary text, and what to do with
text nodes that represent preformatted text (from verbatim sections).
Events
TODO intro... mention that events are supplied for implicits, like for missing >'s
In the following section, we use XML to represent the event structure associated with a
particular construct. That is, an opening tag represents the element start, the
attributes of that opening tag are the attributes given to the callback, and the closing
tag represents the end element.
Three callback methods must be supplied by a class extending Pod::Simple to receive the
corresponding event:
"$parser->_handle_element_start( element_name, attr_hashref )"
"$parser->_handle_element_end( element_name )"
"$parser->_handle_text( text_string )"
Here's the comprehensive list of values you can expect as element_name in your
implementation of "_handle_element_start" and "_handle_element_end"::
events with an element_name of Document
Parsing a document produces this event structure:
<Document start_line="543">
...all events...
</Document>
The value of the start_line attribute will be the line number of the first Pod
directive in the document.
If there is no Pod in the given document, then the event structure will be this:
<Document contentless="1" start_line="543">
</Document>
In that case, the value of the start_line attribute will not be meaningful; under
current implementations, it will probably be the line number of the last line in the
file.
events with an element_name of Para
Parsing a plain (non-verbatim, non-directive, non-data) paragraph in a Pod document
produces this event structure:
<Para start_line="543">
...all events in this paragraph...
</Para>
The value of the start_line attribute will be the line number of the start of the
paragraph.
For example, parsing this paragraph of Pod:
The value of the I<start_line> attribute will be the
line number of the start of the paragraph.
produces this event structure:
<Para start_line="129">
The value of the
<I>
start_line
</I>
attribute will be the line number of the first Pod directive
in the document.
</Para>
events with an element_name of B, C, F, or I.
Parsing a B<...> formatting code (or of course any of its semantically identical
syntactic variants B<<...>>, or B<<<<...>>>>, etc.) produces this event structure:
<B>
...stuff...
</B>
Currently, there are no attributes conveyed.
Parsing C, F, or I codes produce the same structure, with only a different element
name.
If your parser object has been set to accept other formatting codes, then they will be
presented like these B/C/F/I codes -- i.e., without any attributes.
events with an element_name of S
Normally, parsing an S<...> sequence produces this event structure, just as if it were
a B/C/F/I code:
<S>
...stuff...
</S>
However, Pod::Simple (and presumably all derived parsers) offers the "nbsp_for_S"
option which, if enabled, will suppress all S events, and instead change all spaces in
the content to non-breaking spaces. This is intended for formatters that output to a
format that has no code that means the same as S<...>, but which has a code/character
that means non-breaking space.
events with an element_name of X
Normally, parsing an X<...> sequence produces this event structure, just as if it were
a B/C/F/I code:
<X>
...stuff...
</X>
However, Pod::Simple (and presumably all derived parsers) offers the "nix_X_codes"
option which, if enabled, will suppress all X events and ignore their content. For
formatters/processors that don't use X events, this is presumably quite useful.
events with an element_name of L
Because the L<...> is the most complex construct in the language, it should not
surprise you that the events it generates are the most complex in the language. Most
of complexity is hidden away in the attribute values, so for those of you writing a
Pod formatter that produces a non-hypertextual format, you can just ignore the
attributes and treat an L event structure like a formatting element that (presumably)
doesn't actually produce a change in formatting. That is, the content of the L event
structure (as opposed to its attributes) is always what text should be displayed.
There are, at first glance, three kinds of L links: URL, man, and pod.
When a L<some_url> code is parsed, it produces this event structure:
<L content-implicit="yes" raw="that_url" to="that_url" type="url">
that_url
</L>
The "type="url"" attribute is always specified for this type of L code.
For example, this Pod source:
L<http://www.perl.com/CPAN/authors/>
produces this event structure:
<L content-implicit="yes" raw="http://www.perl.com/CPAN/authors/" to="http://www.perl.com/CPAN/authors/" type="url">
http://www.perl.com/CPAN/authors/
</L>
When a L<manpage(section)> code is parsed (and these are fairly rare and not terribly
useful), it produces this event structure:
<L content-implicit="yes" raw="manpage(section)" to="manpage(section)" type="man">
manpage(section)
</L>
The "type="man"" attribute is always specified for this type of L code.
For example, this Pod source:
L<crontab(5)>
produces this event structure:
<L content-implicit="yes" raw="crontab(5)" to="crontab(5)" type="man">
crontab(5)
</L>
In the rare cases where a man page link has a section specified, that text appears in
a section attribute. For example, this Pod source:
L<crontab(5)/"ENVIRONMENT">
will produce this event structure:
<L content-implicit="yes" raw="crontab(5)/"ENVIRONMENT"" section="ENVIRONMENT" to="crontab(5)" type="man">
"ENVIRONMENT" in crontab(5)
</L>
In the rare case where the Pod document has code like L<sometext|manpage(section)>,
then the sometext will appear as the content of the element, the manpage(section) text
will appear only as the value of the to attribute, and there will be no
"content-implicit="yes"" attribute (whose presence means that the Pod parser had to
infer what text should appear as the link text -- as opposed to cases where that
attribute is absent, which means that the Pod parser did not have to infer the link
text, because that L code explicitly specified some link text.)
For example, this Pod source:
L<hell itself!|crontab(5)>
will produce this event structure:
<L raw="hell itself!|crontab(5)" to="crontab(5)" type="man">
hell itself!
</L>
The last type of L structure is for links to/within Pod documents. It is the most
complex because it can have a to attribute, or a section attribute, or both. The
"type="pod"" attribute is always specified for this type of L code.
In the most common case, the simple case of a L<podpage> code produces this event
structure:
<L content-implicit="yes" raw="podpage" to="podpage" type="pod">
podpage
</L>
For example, this Pod source:
L<Net::Ping>
produces this event structure:
<L content-implicit="yes" raw="Net::Ping" to="Net::Ping" type="pod">
Net::Ping
</L>
In cases where there is link-text explicitly specified, it is to be found in the
content of the element (and not the attributes), just as with the
L<sometext|manpage(section)> case discussed above. For example, this Pod source:
L<Perl Error Messages|perldiag>
produces this event structure:
<L raw="Perl Error Messages|perldiag" to="perldiag" type="pod">
Perl Error Messages
</L>
In cases of links to a section in the current Pod document, there is a section
attribute instead of a to attribute. For example, this Pod source:
L</"Member Data">
produces this event structure:
<L content-implicit="yes" raw="/"Member Data"" section="Member Data" type="pod">
"Member Data"
</L>
As another example, this Pod source:
L<the various attributes|/"Member Data">
produces this event structure:
<L raw="the various attributes|/"Member Data"" section="Member Data" type="pod">
the various attributes
</L>
In cases of links to a section in a different Pod document, there are both a section
attribute and a to attribute. For example, this Pod source:
L<perlsyn/"Basic BLOCKs and Switch Statements">
produces this event structure:
<L content-implicit="yes" raw="perlsyn/"Basic BLOCKs and Switch Statements"" section="Basic BLOCKs and Switch Statements" to="perlsyn" type="pod">
"Basic BLOCKs and Switch Statements" in perlsyn
</L>
As another example, this Pod source:
L<SWITCH statements|perlsyn/"Basic BLOCKs and Switch Statements">
produces this event structure:
<L raw="SWITCH statements|perlsyn/"Basic BLOCKs and Switch Statements"" section="Basic BLOCKs and Switch Statements" to="perlsyn" type="pod">
SWITCH statements
</L>
Incidentally, note that we do not distinguish between these syntaxes:
L</"Member Data">
L<"Member Data">
L</Member Data>
L<Member Data> [deprecated syntax]
That is, they all produce the same event structure (for the most part), namely:
<L content-implicit="yes" raw="$depends_on_syntax" section="Member Data" type="pod">
"Member Data"
</L>
The raw attribute depends on what the raw content of the "L<>" is, so that is why the
event structure is the same "for the most part".
If you have not guessed it yet, the raw attribute contains the raw, original,
unescaped content of the "L<>" formatting code. In addition to the examples above,
take notice of the following event structure produced by the following "L<>"
formatting code.
L<click B<here>|page/About the C<-M> switch>
<L raw="click B<here>|page/About the C<-M> switch" section="About the -M switch" to="page" type="pod">
click B<here>
</L>
Specifically, notice that the formatting codes are present and unescaped in raw.
There is a known bug in the raw attribute where any surrounding whitespace is
condensed into a single ' '. For example, given L< link>, raw will be " link".
events with an element_name of E or Z
While there are Pod codes E<...> and Z<>, these do not produce any E or Z events --
that is, there are no such events as E or Z.
events with an element_name of Verbatim
When a Pod verbatim paragraph (AKA "codeblock") is parsed, it produces this event
structure:
<Verbatim start_line="543" xml:space="preserve">
...text...
</Verbatim>
The value of the start_line attribute will be the line number of the first line of
this verbatim block. The xml:space attribute is always present, and always has the
value "preserve".
The text content will have tabs already expanded.
events with an element_name of head1 .. head4
When a "=head1 ..." directive is parsed, it produces this event structure:
<head1>
...stuff...
</head1>
For example, a directive consisting of this:
=head1 Options to C<new> et al.
will produce this event structure:
<head1 start_line="543">
Options to
<C>
new
</C>
et al.
</head1>
"=head2" through "=head4" directives are the same, except for the element names in the
event structure.
events with an element_name of encoding
In the default case, the events corresponding to "=encoding" directives are not
emitted. They are emitted if "keep_encoding_directive" is true. In that case they
produce event structures like "events with an element_name of head1 .. head4" above.
events with an element_name of over-bullet
When an "=over ... =back" block is parsed where the items are a bulleted list, it will
produce this event structure:
<over-bullet indent="4" start_line="543">
<item-bullet start_line="545">
...Stuff...
</item-bullet>
...more item-bullets...
</over-bullet fake-closer="1">
The attribute fake-closer is only present if it is a true value; it is not present if
it is a false value. It is shown in the above example to illustrate where the
attribute is (in the closing tag). It signifies that the "=over" did not have a
matching "=back", and thus Pod::Simple had to create a fake closer.
For example, this Pod source:
=over
=item *
Something
=back
Would produce an event structure that does not have the fake-closer attribute, whereas
this Pod source:
=over
=item *
Gasp! An unclosed =over block!
would. The rest of the over-* examples will not demonstrate this attribute, but they
all can have it. See Pod::Checker's source for an example of this attribute being
used.
The value of the indent attribute is whatever value is after the "=over" directive, as
in "=over 8". If no such value is specified in the directive, then the indent
attribute has the value "4".
For example, this Pod source:
=over
=item *
Stuff
=item *
Bar I<baz>!
=back
produces this event structure:
<over-bullet indent="4" start_line="10">
<item-bullet start_line="12">
Stuff
</item-bullet>
<item-bullet start_line="14">
Bar <I>baz</I>!
</item-bullet>
</over-bullet>
events with an element_name of over-number
When an "=over ... =back" block is parsed where the items are a numbered list, it will
produce this event structure:
<over-number indent="4" start_line="543">
<item-number number="1" start_line="545">
...Stuff...
</item-number>
...more item-number...
</over-bullet>
This is like the "over-bullet" event structure; but note that the contents are "item-
number" instead of "item-bullet", and note that they will have a "number" attribute,
which some formatters/processors may ignore (since, for example, there's no need for
it in HTML when producing an "<UL><LI>...</LI>...</UL>" structure), but which any
processor may use.
Note that the values for the number attributes of "item-number" elements in a given
"over-number" area will start at 1 and go up by one each time. If the Pod source
doesn't follow that order (even though it really should!), whatever numbers it has
will be ignored (with the correct values being put in the number attributes), and an
error message might be issued to the user.
events with an element_name of over-text
These events are somewhat unlike the other over-* structures, as far as what their
contents are. When an "=over ... =back" block is parsed where the items are a list of
text "subheadings", it will produce this event structure:
<over-text indent="4" start_line="543">
<item-text>
...stuff...
</item-text>
...stuff (generally Para or Verbatim elements)...
<item-text>
...more item-text and/or stuff...
</over-text>
The indent and fake-closer attributes are as with the other over-* events.
For example, this Pod source:
=over
=item Foo
Stuff
=item Bar I<baz>!
Quux
=back
produces this event structure:
<over-text indent="4" start_line="20">
<item-text start_line="22">
Foo
</item-text>
<Para start_line="24">
Stuff
</Para>
<item-text start_line="26">
Bar
<I>
baz
</I>
!
</item-text>
<Para start_line="28">
Quux
</Para>
</over-text>
events with an element_name of over-block
These events are somewhat unlike the other over-* structures, as far as what their
contents are. When an "=over ... =back" block is parsed where there are no items, it
will produce this event structure:
<over-block indent="4" start_line="543">
...stuff (generally Para or Verbatim elements)...
</over-block>
The indent and fake-closer attributes are as with the other over-* events.
For example, this Pod source:
=over
For cutting off our trade with all parts of the world
For transporting us beyond seas to be tried for pretended offenses
He is at this time transporting large armies of foreign mercenaries to
complete the works of death, desolation and tyranny, already begun with
circumstances of cruelty and perfidy scarcely paralleled in the most
barbarous ages, and totally unworthy the head of a civilized nation.
=back
will produce this event structure:
<over-block indent="4" start_line="2">
<Para start_line="4">
For cutting off our trade with all parts of the world
</Para>
<Para start_line="6">
For transporting us beyond seas to be tried for pretended offenses
</Para>
<Para start_line="8">
He is at this time transporting large armies of [...more text...]
</Para>
</over-block>
events with an element_name of over-empty
Note: These events are only triggered if "parse_empty_lists()" is set to a true value.
These events are somewhat unlike the other over-* structures, as far as what their
contents are. When an "=over ... =back" block is parsed where there is no content, it
will produce this event structure:
<over-empty indent="4" start_line="543">
</over-empty>
The indent and fake-closer attributes are as with the other over-* events.
For example, this Pod source:
=over
=over
=back
=back
will produce this event structure:
<over-block indent="4" start_line="1">
<over-empty indent="4" start_line="3">
</over-empty>
</over-block>
Note that the outer "=over" is a block because it has no "=item"s but still has
content: the inner "=over". The inner "=over", in turn, is completely empty, and is
treated as such.
events with an element_name of item-bullet
See "events with an element_name of over-bullet", above.
events with an element_name of item-number
See "events with an element_name of over-number", above.
events with an element_name of item-text
See "events with an element_name of over-text", above.
events with an element_name of for
TODO...
events with an element_name of Data
TODO...
More Pod::Simple Methods
Pod::Simple provides a lot of methods that aren't generally interesting to the end user of
an existing Pod formatter, but some of which you might find useful in writing a Pod
formatter. They are listed below. The first several methods (the accept_* methods) are for
declaring the capabilities of your parser, notably what "=for targetname" sections it's
interested in, what extra N<...> codes it accepts beyond the ones described in the
perlpod.
"$parser->accept_targets( SOMEVALUE )"
As the parser sees sections like:
=for html <img src="fig1.jpg">
or
=begin html
<img src="fig1.jpg">
=end html
...the parser will ignore these sections unless your subclass has specified that it
wants to see sections targeted to "html" (or whatever the formatter name is).
If you want to process all sections, even if they're not targeted for you, call this
before you start parsing:
$parser->accept_targets('*');
"$parser->accept_targets_as_text( SOMEVALUE )"
This is like accept_targets, except that it specifies also that the content of
sections for this target should be treated as Pod text even if the target name in
"=for targetname" doesn't start with a ":".
At time of writing, I don't think you'll need to use this.
"$parser->accept_codes( Codename, Codename... )"
This tells the parser that you accept additional formatting codes, beyond just the
standard ones (I B C L F S X, plus the two weird ones you don't actually see in the
parse tree, Z and E). For example, to also accept codes "N", "R", and "W":
$parser->accept_codes( qw( N R W ) );
TODO: document how this interacts with =extend, and long element names
"$parser->accept_directive_as_data( directive_name )"
"$parser->accept_directive_as_verbatim( directive_name )"
"$parser->accept_directive_as_processed( directive_name )"
In the unlikely situation that you need to tell the parser that you will accept
additional directives ("=foo" things), you need to first set the parser to treat its
content as data (i.e., not really processed at all), or as verbatim (mostly just
expanding tabs), or as processed text (parsing formatting codes like B<...>).
For example, to accept a new directive "=method", you'd presumably use:
$parser->accept_directive_as_processed("method");
so that you could have Pod lines like:
=method I<$whatever> thing B<um>
Making up your own directives breaks compatibility with other Pod formatters, in a way
that using "=for target ..." lines doesn't; however, you may find this useful if
you're making a Pod superset format where you don't need to worry about compatibility.
"$parser->nbsp_for_S( BOOLEAN );"
Setting this attribute to a true value (and by default it is false) will turn "S<...>"
sequences into sequences of words separated by "\xA0" (non-breaking space) characters.
For example, it will take this:
I like S<Dutch apple pie>, don't you?
and treat it as if it were:
I like DutchE<nbsp>appleE<nbsp>pie, don't you?
This is handy for output formats that don't have anything quite like an "S<...>" code,
but which do have a code for non-breaking space.
There is currently no method for going the other way; but I can probably provide one
upon request.
"$parser->version_report()"
This returns a string reporting the $VERSION value from your module (and its
classname) as well as the $VERSION value of Pod::Simple. Note that perlpodspec
requires output formats (wherever possible) to note this detail in a comment in the
output format. For example, for some kind of SGML output format:
print OUT "<!-- \n", $parser->version_report, "\n -->";
"$parser->pod_para_count()"
This returns the count of Pod paragraphs seen so far.
"$parser->line_count()"
This is the current line number being parsed. But you might find the "line_number"
event attribute more accurate, when it is present.
"$parser->nix_X_codes( SOMEVALUE )"
This attribute, when set to a true value (and it is false by default) ignores any
"X<...>" sequences in the document being parsed. Many formats don't actually use the
content of these codes, so have no reason to process them.
"$parser->keep_encoding_directive( SOMEVALUE )"
This attribute, when set to a true value (it is false by default) will keep
"=encoding" and its content in the event structure. Most formats don't actually need
to process the content of an "=encoding" directive, even when this directive sets the
encoding and the processor makes use of the encoding information. Indeed, it is
possible to know the encoding without processing the directive content.
"$parser->merge_text( SOMEVALUE )"
This attribute, when set to a true value (and it is false by default) makes sure that
only one event (or token, or node) will be created for any single contiguous sequence
of text. For example, consider this somewhat contrived example:
I just LOVE Z<>hotE<32>apple pie!
When that is parsed and events are about to be called on it, it may actually seem to
be four different text events, one right after another: one event for "I just LOVE ",
one for "hot", one for " ", and one for "apple pie!". But if you have merge_text on,
then you're guaranteed that it will be fired as one text event: "I just LOVE hot
apple pie!".
"$parser->code_handler( CODE_REF )"
This specifies code that should be called when a code line is seen (i.e., a line
outside of the Pod). Normally this is undef, meaning that no code should be called.
If you provide a routine, it should start out like this:
sub get_code_line { # or whatever you'll call it
my($line, $line_number, $parser) = @_;
...
}
Note, however, that sometimes the Pod events aren't processed in exactly the same
order as the code lines are -- i.e., if you have a file with Pod, then code, then more
Pod, sometimes the code will be processed (via whatever you have code_handler call)
before the all of the preceding Pod has been processed.
"$parser->cut_handler( CODE_REF )"
This is just like the code_handler attribute, except that it's for "=cut" lines, not
code lines. The same caveats apply. "=cut" lines are unlikely to be interesting, but
this is included for completeness.
"$parser->pod_handler( CODE_REF )"
This is just like the code_handler attribute, except that it's for "=pod" lines, not
code lines. The same caveats apply. "=pod" lines are unlikely to be interesting, but
this is included for completeness.
"$parser->whiteline_handler( CODE_REF )"
This is just like the code_handler attribute, except that it's for lines that are
seemingly blank but have whitespace (" " and/or "\t") on them, not code lines. The
same caveats apply. These lines are unlikely to be interesting, but this is included
for completeness.
"$parser->whine( linenumber, complaint string )"
This notes a problem in the Pod, which will be reported in the "Pod Errors" section of
the document and/or sent to STDERR, depending on the values of the attributes
"no_whining", "no_errata_section", and "complain_stderr".
"$parser->scream( linenumber, complaint string )"
This notes an error like "whine" does, except that it is not suppressible with
"no_whining". This should be used only for very serious errors.
"$parser->source_dead(1)"
This aborts parsing of the current document, by switching on the flag that indicates
that EOF has been seen. In particularly drastic cases, you might want to do this.
It's rather nicer than just calling "die"!
"$parser->hide_line_numbers( SOMEVALUE )"
Some subclasses that indiscriminately dump event attributes (well, except for ones
beginning with "~") can use this object attribute for refraining to dump the
"start_line" attribute.
"$parser->no_whining( SOMEVALUE )"
This attribute, if set to true, will suppress reports of non-fatal error messages.
The default value is false, meaning that complaints are reported. How they get
reported depends on the values of the attributes "no_errata_section" and
"complain_stderr".
"$parser->no_errata_section( SOMEVALUE )"
This attribute, if set to true, will suppress generation of an errata section. The
default value is false -- i.e., an errata section will be generated.
"$parser->complain_stderr( SOMEVALUE )"
This attribute, if set to true will send complaints to STDERR. The default value is
false -- i.e., complaints do not go to STDERR.
"$parser->bare_output( SOMEVALUE )"
Some formatter subclasses use this as a flag for whether output should have prologue
and epilogue code omitted. For example, setting this to true for an HTML formatter
class should omit the "<html><head><title>...</title><body>..." prologue and the
"</body></html>" epilogue.
If you want to set this to true, you should probably also set "no_whining" or at least
"no_errata_section" to true.
"$parser->preserve_whitespace( SOMEVALUE )"
If you set this attribute to a true value, the parser will try to preserve whitespace
in the output. This means that such formatting conventions as two spaces after
periods will be preserved by the parser. This is primarily useful for output formats
that treat whitespace as significant (such as text or *roff, but not HTML).
"$parser->parse_empty_lists( SOMEVALUE )"
If this attribute is set to true, the parser will not ignore empty "=over"/"=back"
blocks. The type of "=over" will be empty, documented above, "events with an
element_name of over-empty".
SEE ALSO
Pod::Simple -- event-based Pod-parsing framework
Pod::Simple::Methody -- like Pod::Simple, but each sort of event calls its own method
(like "start_head3")
Pod::Simple::PullParser -- a Pod-parsing framework like Pod::Simple, but with a token-
stream interface
Pod::Simple::SimpleTree -- a Pod-parsing framework like Pod::Simple, but with a tree
interface
Pod::Simple::Checker -- a simple Pod::Simple subclass that reads documents, and then makes
a plaintext report of any errors found in the document
Pod::Simple::DumpAsXML -- for dumping Pod documents as tidily indented XML, showing each
event on its own line
Pod::Simple::XMLOutStream -- dumps a Pod document as XML (without introducing extra
whitespace as Pod::Simple::DumpAsXML does).
Pod::Simple::DumpAsText -- for dumping Pod documents as tidily indented text, showing each
event on its own line
Pod::Simple::LinkSection -- class for objects representing the values of the TODO and TODO
attributes of L<...> elements
Pod::Escapes -- the module that Pod::Simple uses for evaluating E<...> content
Pod::Simple::Text -- a simple plaintext formatter for Pod
Pod::Simple::TextContent -- like Pod::Simple::Text, but makes no effort for indent or wrap
the text being formatted
Pod::Simple::HTML -- a simple HTML formatter for Pod
perlpod
perlpodspec
perldoc
SUPPORT
Questions or discussion about POD and Pod::Simple should be sent to the
pod-people AT perl.org mail list. Send an empty email to pod-people-subscribe AT perl.org to
subscribe.
This module is managed in an open GitHub repository,
<https://github.com/perl-pod/pod-simple/>. Feel free to fork and contribute, or to clone
<git://github.com/perl-pod/pod-simple.git> and send patches!
Patches against Pod::Simple are welcome. Please send bug reports to
<bug-pod-simple AT rt.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 AT cpan.org>. But don't bother him, he's
retired.
Pod::Simple is maintained by:
o Allison Randal "allison AT perl.org"
o Hans Dieter Pearcey "hdp AT cpan.org"
o David E. Wheeler "dwheeler AT cpan.org"
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