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.\" ========================================================================
.\"
.IX Title "Pod::InputObjects 3"
.TH Pod::InputObjects 3 "2012-11-03" "perl v5.12.5" "Perl Programmers Reference Guide"
.\" 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"
Pod::InputObjects \- objects representing POD input paragraphs, commands, etc.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Pod::InputObjects;
.Ve
.SH "REQUIRES"
.IX Header "REQUIRES"
perl5.004, Carp
.SH "EXPORTS"
.IX Header "EXPORTS"
Nothing.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module defines some basic input objects used by \fBPod::Parser\fR when
reading and parsing \s-1POD\s0 text from an input source. The following objects
are defined:
.Sp
.RS 4
package \fBPod::Paragraph\fR
.Sp
An object corresponding to a paragraph of \s-1POD\s0 input text. It may be a
plain paragraph, a verbatim paragraph, or a command paragraph (see
perlpod).
.Sp
package \fBPod::InteriorSequence\fR
.Sp
An object corresponding to an interior sequence command from the \s-1POD\s0
input text (see perlpod).
.Sp
package \fBPod::ParseTree\fR
.Sp
An object corresponding to a tree of parsed \s-1POD\s0 text. Each \*(L"node\*(R" in
a parse-tree (or \fIptree\fR) is either a text-string or a reference to
a \fBPod::InteriorSequence\fR object. The nodes appear in the parse-tree
in the order in which they were parsed from left-to-right.
.RE
.PP
Each of these input objects are described in further detail in the
sections which follow.
.SH "\fBPod::Paragraph\fP"
.IX Header "Pod::Paragraph"
An object representing a paragraph of \s-1POD\s0 input text.
It has the following methods/attributes:
.SS "Pod::Paragraph\->\fB\fP\f(BInew()\fP\fB\fP"
.IX Subsection "Pod::Paragraph->new()"
.Vb 10
\&        my $pod_para1 = Pod::Paragraph\->new(\-text => $text);
\&        my $pod_para2 = Pod::Paragraph\->new(\-name => $cmd,
\&                                            \-text => $text);
\&        my $pod_para3 = new Pod::Paragraph(\-text => $text);
\&        my $pod_para4 = new Pod::Paragraph(\-name => $cmd,
\&                                           \-text => $text);
\&        my $pod_para5 = Pod::Paragraph\->new(\-name => $cmd,
\&                                            \-text => $text,
\&                                            \-file => $filename,
\&                                            \-line => $line_number);
.Ve
.PP
This is a class method that constructs a \f(CW\*(C`Pod::Paragraph\*(C'\fR object and
returns a reference to the new paragraph object. It may be given one or
two keyword arguments. The \f(CW\*(C`\-text\*(C'\fR keyword indicates the corresponding
text of the \s-1POD\s0 paragraph. The \f(CW\*(C`\-name\*(C'\fR keyword indicates the name of
the corresponding \s-1POD\s0 command, such as \f(CW\*(C`head1\*(C'\fR or \f(CW\*(C`item\*(C'\fR (it should
\&\fInot\fR contain the \f(CW\*(C`=\*(C'\fR prefix); this is needed only if the \s-1POD\s0
paragraph corresponds to a command paragraph. The \f(CW\*(C`\-file\*(C'\fR and \f(CW\*(C`\-line\*(C'\fR
keywords indicate the filename and line number corresponding to the
beginning of the paragraph
.ie n .SS "$pod_para\->\fB\fP\f(BIcmd_name()\fP\fB\fP"
.el .SS "\f(CW$pod_para\fP\->\fB\fP\f(BIcmd_name()\fP\fB\fP"
.IX Subsection "$pod_para->cmd_name()"
.Vb 1
\&        my $para_cmd = $pod_para\->cmd_name();
.Ve
.PP
If this paragraph is a command paragraph, then this method will return 
the name of the command (\fIwithout\fR any leading \f(CW\*(C`=\*(C'\fR prefix).
.ie n .SS "$pod_para\->\fB\fP\f(BItext()\fP\fB\fP"
.el .SS "\f(CW$pod_para\fP\->\fB\fP\f(BItext()\fP\fB\fP"
.IX Subsection "$pod_para->text()"
.Vb 1
\&        my $para_text = $pod_para\->text();
.Ve
.PP
This method will return the corresponding text of the paragraph.
.ie n .SS "$pod_para\->\fB\fP\f(BIraw_text()\fP\fB\fP"
.el .SS "\f(CW$pod_para\fP\->\fB\fP\f(BIraw_text()\fP\fB\fP"
.IX Subsection "$pod_para->raw_text()"
.Vb 1
\&        my $raw_pod_para = $pod_para\->raw_text();
.Ve
.PP
This method will return the \fIraw\fR text of the \s-1POD\s0 paragraph, exactly
as it appeared in the input.
.ie n .SS "$pod_para\->\fB\fP\f(BIcmd_prefix()\fP\fB\fP"
.el .SS "\f(CW$pod_para\fP\->\fB\fP\f(BIcmd_prefix()\fP\fB\fP"
.IX Subsection "$pod_para->cmd_prefix()"
.Vb 1
\&        my $prefix = $pod_para\->cmd_prefix();
.Ve
.PP
If this paragraph is a command paragraph, then this method will return 
the prefix used to denote the command (which should be the string \*(L"=\*(R"
or \*(L"==\*(R").
.ie n .SS "$pod_para\->\fB\fP\f(BIcmd_separator()\fP\fB\fP"
.el .SS "\f(CW$pod_para\fP\->\fB\fP\f(BIcmd_separator()\fP\fB\fP"
.IX Subsection "$pod_para->cmd_separator()"
.Vb 1
\&        my $separator = $pod_para\->cmd_separator();
.Ve
.PP
If this paragraph is a command paragraph, then this method will return
the text used to separate the command name from the rest of the
paragraph (if any).
.ie n .SS "$pod_para\->\fB\fP\f(BIparse_tree()\fP\fB\fP"
.el .SS "\f(CW$pod_para\fP\->\fB\fP\f(BIparse_tree()\fP\fB\fP"
.IX Subsection "$pod_para->parse_tree()"
.Vb 3
\&        my $ptree = $pod_parser\->parse_text( $pod_para\->text() );
\&        $pod_para\->parse_tree( $ptree );
\&        $ptree = $pod_para\->parse_tree();
.Ve
.PP
This method will get/set the corresponding parse-tree of the paragraph's text.
.ie n .SS "$pod_para\->\fB\fP\f(BIfile_line()\fP\fB\fP"
.el .SS "\f(CW$pod_para\fP\->\fB\fP\f(BIfile_line()\fP\fB\fP"
.IX Subsection "$pod_para->file_line()"
.Vb 2
\&        my ($filename, $line_number) = $pod_para\->file_line();
\&        my $position = $pod_para\->file_line();
.Ve
.PP
Returns the current filename and line number for the paragraph
object.  If called in a list context, it returns a list of two
elements: first the filename, then the line number. If called in
a scalar context, it returns a string containing the filename, followed
by a colon (':'), followed by the line number.
.SH "\fBPod::InteriorSequence\fP"
.IX Header "Pod::InteriorSequence"
An object representing a \s-1POD\s0 interior sequence command.
It has the following methods/attributes:
.SS "Pod::InteriorSequence\->\fB\fP\f(BInew()\fP\fB\fP"
.IX Subsection "Pod::InteriorSequence->new()"
.Vb 8
\&        my $pod_seq1 = Pod::InteriorSequence\->new(\-name => $cmd
\&                                                  \-ldelim => $delimiter);
\&        my $pod_seq2 = new Pod::InteriorSequence(\-name => $cmd,
\&                                                 \-ldelim => $delimiter);
\&        my $pod_seq3 = new Pod::InteriorSequence(\-name => $cmd,
\&                                                 \-ldelim => $delimiter,
\&                                                 \-file => $filename,
\&                                                 \-line => $line_number);
\&
\&        my $pod_seq4 = new Pod::InteriorSequence(\-name => $cmd, $ptree);
\&        my $pod_seq5 = new Pod::InteriorSequence($cmd, $ptree);
.Ve
.PP
This is a class method that constructs a \f(CW\*(C`Pod::InteriorSequence\*(C'\fR object
and returns a reference to the new interior sequence object. It should
be given two keyword arguments.  The \f(CW\*(C`\-ldelim\*(C'\fR keyword indicates the
corresponding left-delimiter of the interior sequence (e.g. '<').
The \f(CW\*(C`\-name\*(C'\fR keyword indicates the name of the corresponding interior
sequence command, such as \f(CW\*(C`I\*(C'\fR or \f(CW\*(C`B\*(C'\fR or \f(CW\*(C`C\*(C'\fR. The \f(CW\*(C`\-file\*(C'\fR and
\&\f(CW\*(C`\-line\*(C'\fR keywords indicate the filename and line number corresponding
to the beginning of the interior sequence. If the \f(CW$ptree\fR argument is
given, it must be the last argument, and it must be either string, or
else an array-ref suitable for passing to \fBPod::ParseTree::new\fR (or
it may be a reference to a Pod::ParseTree object).
.ie n .SS "$pod_seq\->\fB\fP\f(BIcmd_name()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIcmd_name()\fP\fB\fP"
.IX Subsection "$pod_seq->cmd_name()"
.Vb 1
\&        my $seq_cmd = $pod_seq\->cmd_name();
.Ve
.PP
The name of the interior sequence command.
.ie n .SS "$pod_seq\->\fB\fP\f(BIprepend()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIprepend()\fP\fB\fP"
.IX Subsection "$pod_seq->prepend()"
.Vb 2
\&        $pod_seq\->prepend($text);
\&        $pod_seq1\->prepend($pod_seq2);
.Ve
.PP
Prepends the given string or parse-tree or sequence object to the parse-tree
of this interior sequence.
.ie n .SS "$pod_seq\->\fB\fP\f(BIappend()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIappend()\fP\fB\fP"
.IX Subsection "$pod_seq->append()"
.Vb 2
\&        $pod_seq\->append($text);
\&        $pod_seq1\->append($pod_seq2);
.Ve
.PP
Appends the given string or parse-tree or sequence object to the parse-tree
of this interior sequence.
.ie n .SS "$pod_seq\->\fB\fP\f(BInested()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BInested()\fP\fB\fP"
.IX Subsection "$pod_seq->nested()"
.Vb 1
\&        $outer_seq = $pod_seq\->nested || print "not nested";
.Ve
.PP
If this interior sequence is nested inside of another interior
sequence, then the outer/parent sequence that contains it is
returned. Otherwise \f(CW\*(C`undef\*(C'\fR is returned.
.ie n .SS "$pod_seq\->\fB\fP\f(BIraw_text()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIraw_text()\fP\fB\fP"
.IX Subsection "$pod_seq->raw_text()"
.Vb 1
\&        my $seq_raw_text = $pod_seq\->raw_text();
.Ve
.PP
This method will return the \fIraw\fR text of the \s-1POD\s0 interior sequence,
exactly as it appeared in the input.
.ie n .SS "$pod_seq\->\fB\fP\f(BIleft_delimiter()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIleft_delimiter()\fP\fB\fP"
.IX Subsection "$pod_seq->left_delimiter()"
.Vb 1
\&        my $ldelim = $pod_seq\->left_delimiter();
.Ve
.PP
The leftmost delimiter beginning the argument text to the interior
sequence (should be \*(L"<\*(R").
.ie n .SS "$pod_seq\->\fB\fP\f(BIright_delimiter()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIright_delimiter()\fP\fB\fP"
.IX Subsection "$pod_seq->right_delimiter()"
The rightmost delimiter beginning the argument text to the interior
sequence (should be \*(L">\*(R").
.ie n .SS "$pod_seq\->\fB\fP\f(BIparse_tree()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIparse_tree()\fP\fB\fP"
.IX Subsection "$pod_seq->parse_tree()"
.Vb 3
\&        my $ptree = $pod_parser\->parse_text($paragraph_text);
\&        $pod_seq\->parse_tree( $ptree );
\&        $ptree = $pod_seq\->parse_tree();
.Ve
.PP
This method will get/set the corresponding parse-tree of the interior
sequence's text.
.ie n .SS "$pod_seq\->\fB\fP\f(BIfile_line()\fP\fB\fP"
.el .SS "\f(CW$pod_seq\fP\->\fB\fP\f(BIfile_line()\fP\fB\fP"
.IX Subsection "$pod_seq->file_line()"
.Vb 2
\&        my ($filename, $line_number) = $pod_seq\->file_line();
\&        my $position = $pod_seq\->file_line();
.Ve
.PP
Returns the current filename and line number for the interior sequence
object.  If called in a list context, it returns a list of two
elements: first the filename, then the line number. If called in
a scalar context, it returns a string containing the filename, followed
by a colon (':'), followed by the line number.
.SS "Pod::InteriorSequence::\fB\s-1\fP\f(BIDESTROY\s0()\fP\fB\fP"
.IX Subsection "Pod::InteriorSequence::DESTROY()"
This method performs any necessary cleanup for the interior-sequence.
If you override this method then it is \fBimperative\fR that you invoke
the parent method from within your own method, otherwise
\&\fIinterior-sequence storage will not be reclaimed upon destruction!\fR
.SH "\fBPod::ParseTree\fP"
.IX Header "Pod::ParseTree"
This object corresponds to a tree of parsed \s-1POD\s0 text. As \s-1POD\s0 text is
scanned from left to right, it is parsed into an ordered list of
text-strings and \fBPod::InteriorSequence\fR objects (in order of
appearance). A \fBPod::ParseTree\fR object corresponds to this list of
strings and sequences. Each interior sequence in the parse-tree may
itself contain a parse-tree (since interior sequences may be nested).
.SS "Pod::ParseTree\->\fB\fP\f(BInew()\fP\fB\fP"
.IX Subsection "Pod::ParseTree->new()"
.Vb 4
\&        my $ptree1 = Pod::ParseTree\->new;
\&        my $ptree2 = new Pod::ParseTree;
\&        my $ptree4 = Pod::ParseTree\->new($array_ref);
\&        my $ptree3 = new Pod::ParseTree($array_ref);
.Ve
.PP
This is a class method that constructs a \f(CW\*(C`Pod::Parse_tree\*(C'\fR object and
returns a reference to the new parse-tree. If a single-argument is given,
it must be a reference to an array, and is used to initialize the root
(top) of the parse tree.
.ie n .SS "$ptree\->\fB\fP\f(BItop()\fP\fB\fP"
.el .SS "\f(CW$ptree\fP\->\fB\fP\f(BItop()\fP\fB\fP"
.IX Subsection "$ptree->top()"
.Vb 3
\&        my $top_node = $ptree\->top();
\&        $ptree\->top( $top_node );
\&        $ptree\->top( @children );
.Ve
.PP
This method gets/sets the top node of the parse-tree. If no arguments are
given, it returns the topmost node in the tree (the root), which is also
a \fBPod::ParseTree\fR. If it is given a single argument that is a reference,
then the reference is assumed to a parse-tree and becomes the new top node.
Otherwise, if arguments are given, they are treated as the new list of
children for the top node.
.ie n .SS "$ptree\->\fB\fP\f(BIchildren()\fP\fB\fP"
.el .SS "\f(CW$ptree\fP\->\fB\fP\f(BIchildren()\fP\fB\fP"
.IX Subsection "$ptree->children()"
This method gets/sets the children of the top node in the parse-tree.
If no arguments are given, it returns the list (array) of children
(each of which should be either a string or a \fBPod::InteriorSequence\fR.
Otherwise, if arguments are given, they are treated as the new list of
children for the top node.
.ie n .SS "$ptree\->\fB\fP\f(BIprepend()\fP\fB\fP"
.el .SS "\f(CW$ptree\fP\->\fB\fP\f(BIprepend()\fP\fB\fP"
.IX Subsection "$ptree->prepend()"
This method prepends the given text or parse-tree to the current parse-tree.
If the first item on the parse-tree is text and the argument is also text,
then the text is prepended to the first item (not added as a separate string).
Otherwise the argument is added as a new string or parse-tree \fIbefore\fR
the current one.
.ie n .SS "$ptree\->\fB\fP\f(BIappend()\fP\fB\fP"
.el .SS "\f(CW$ptree\fP\->\fB\fP\f(BIappend()\fP\fB\fP"
.IX Subsection "$ptree->append()"
This method appends the given text or parse-tree to the current parse-tree.
If the last item on the parse-tree is text and the argument is also text,
then the text is appended to the last item (not added as a separate string).
Otherwise the argument is added as a new string or parse-tree \fIafter\fR
the current one.
.ie n .SS "$ptree\->\fB\fP\f(BIraw_text()\fP\fB\fP"
.el .SS "\f(CW$ptree\fP\->\fB\fP\f(BIraw_text()\fP\fB\fP"
.IX Subsection "$ptree->raw_text()"
.Vb 1
\&        my $ptree_raw_text = $ptree\->raw_text();
.Ve
.PP
This method will return the \fIraw\fR text of the \s-1POD\s0 parse-tree
exactly as it appeared in the input.
.SS "Pod::ParseTree::\fB\s-1\fP\f(BIDESTROY\s0()\fP\fB\fP"
.IX Subsection "Pod::ParseTree::DESTROY()"
This method performs any necessary cleanup for the parse-tree.
If you override this method then it is \fBimperative\fR
that you invoke the parent method from within your own method,
otherwise \fIparse-tree storage will not be reclaimed upon destruction!\fR

.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE 
=
Availability	runtime/perl-512
=
Stability	Uncommitted
.TE 
.PP
.SH "SEE ALSO"
.IX Header "SEE ALSO"
See Pod::Parser, Pod::Select
.SH "AUTHOR"
.IX Header "AUTHOR"
Please report bugs using <http://rt.cpan.org>.
.PP
Brad Appleton <bradapp@enteract.com>
.SH "POD ERRORS"
.IX Header "POD ERRORS"
Hey! \fBThe above document had some coding errors, which are explained below:\fR
.IP "Around line 42:" 4
.IX Item "Around line 42:"
You can't have =items (as at line 55) unless the first thing after the =over is an =item


.SH NOTES

.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland.  The original community source was downloaded from  http://www.cpan.org/src/5.0/perl-5.12.5.tar.bz2

Further information about this software can be found on the open source community website at http://www.perl.org/.