1 # Pod::Text -- Convert POD data to formatted ASCII text.
2 # $Id: Text.pm,v 2.14 2001/11/15 08:03:18 eagle Exp $
4 # Copyright 1999, 2000, 2001 by Russ Allbery <rra@stanford.edu>
6 # This program is free software; you may redistribute it and/or modify it
7 # under the same terms as Perl itself.
9 # This module replaces the old Pod::Text that came with versions of Perl prior
10 # to 5.6.0, and attempts to match its output except for some specific
11 # circumstances where other decisions seemed to produce better output. It
12 # uses Pod::Parser and is designed to be very easy to subclass.
14 # Perl core hackers, please note that this module is also separately
15 # maintained outside of the Perl core as part of the podlators. Please send
16 # me any patches at the address above in addition to sending them to the
17 # standard Perl mailing lists.
19 ##############################################################################
20 # Modules and declarations
21 ##############################################################################
27 use Carp qw(carp croak);
29 use Pod::ParseLink qw(parselink);
33 use vars qw(@ISA @EXPORT %ESCAPES $VERSION);
35 # We inherit from Pod::Select instead of Pod::Parser so that we can be used by
37 @ISA = qw(Pod::Select Exporter);
39 # We have to export pod2text for backward compatibility.
40 @EXPORT = qw(pod2text);
42 # Don't use the CVS revision as the version, since this module is also in Perl
43 # core and too many things could munge CVS magic revision strings. This
44 # number should ideally be the same as the CVS revision in podlators, however.
48 ##############################################################################
49 # Table of supported E<> escapes
50 ##############################################################################
52 # This table is taken near verbatim from Pod::PlainText in Pod::Parser, which
53 # got it near verbatim from the original Pod::Text. It is therefore credited
54 # to Tom Christiansen, and I'm glad I didn't have to write it. :) "iexcl" to
55 # "divide" added by Tim Jenness.
57 'amp' => '&', # ampersand
58 'apos' => "'", # apostrophe
59 'lt' => '<', # left chevron, less-than
60 'gt' => '>', # right chevron, greater-than
61 'quot' => '"', # double quote
62 'sol' => '/', # solidus (forward slash)
63 'verbar' => '|', # vertical bar
65 "Aacute" => "\xC1", # capital A, acute accent
66 "aacute" => "\xE1", # small a, acute accent
67 "Acirc" => "\xC2", # capital A, circumflex accent
68 "acirc" => "\xE2", # small a, circumflex accent
69 "AElig" => "\xC6", # capital AE diphthong (ligature)
70 "aelig" => "\xE6", # small ae diphthong (ligature)
71 "Agrave" => "\xC0", # capital A, grave accent
72 "agrave" => "\xE0", # small a, grave accent
73 "Aring" => "\xC5", # capital A, ring
74 "aring" => "\xE5", # small a, ring
75 "Atilde" => "\xC3", # capital A, tilde
76 "atilde" => "\xE3", # small a, tilde
77 "Auml" => "\xC4", # capital A, dieresis or umlaut mark
78 "auml" => "\xE4", # small a, dieresis or umlaut mark
79 "Ccedil" => "\xC7", # capital C, cedilla
80 "ccedil" => "\xE7", # small c, cedilla
81 "Eacute" => "\xC9", # capital E, acute accent
82 "eacute" => "\xE9", # small e, acute accent
83 "Ecirc" => "\xCA", # capital E, circumflex accent
84 "ecirc" => "\xEA", # small e, circumflex accent
85 "Egrave" => "\xC8", # capital E, grave accent
86 "egrave" => "\xE8", # small e, grave accent
87 "ETH" => "\xD0", # capital Eth, Icelandic
88 "eth" => "\xF0", # small eth, Icelandic
89 "Euml" => "\xCB", # capital E, dieresis or umlaut mark
90 "euml" => "\xEB", # small e, dieresis or umlaut mark
91 "Iacute" => "\xCD", # capital I, acute accent
92 "iacute" => "\xED", # small i, acute accent
93 "Icirc" => "\xCE", # capital I, circumflex accent
94 "icirc" => "\xEE", # small i, circumflex accent
95 "Igrave" => "\xCC", # capital I, grave accent
96 "igrave" => "\xEC", # small i, grave accent
97 "Iuml" => "\xCF", # capital I, dieresis or umlaut mark
98 "iuml" => "\xEF", # small i, dieresis or umlaut mark
99 "Ntilde" => "\xD1", # capital N, tilde
100 "ntilde" => "\xF1", # small n, tilde
101 "Oacute" => "\xD3", # capital O, acute accent
102 "oacute" => "\xF3", # small o, acute accent
103 "Ocirc" => "\xD4", # capital O, circumflex accent
104 "ocirc" => "\xF4", # small o, circumflex accent
105 "Ograve" => "\xD2", # capital O, grave accent
106 "ograve" => "\xF2", # small o, grave accent
107 "Oslash" => "\xD8", # capital O, slash
108 "oslash" => "\xF8", # small o, slash
109 "Otilde" => "\xD5", # capital O, tilde
110 "otilde" => "\xF5", # small o, tilde
111 "Ouml" => "\xD6", # capital O, dieresis or umlaut mark
112 "ouml" => "\xF6", # small o, dieresis or umlaut mark
113 "szlig" => "\xDF", # small sharp s, German (sz ligature)
114 "THORN" => "\xDE", # capital THORN, Icelandic
115 "thorn" => "\xFE", # small thorn, Icelandic
116 "Uacute" => "\xDA", # capital U, acute accent
117 "uacute" => "\xFA", # small u, acute accent
118 "Ucirc" => "\xDB", # capital U, circumflex accent
119 "ucirc" => "\xFB", # small u, circumflex accent
120 "Ugrave" => "\xD9", # capital U, grave accent
121 "ugrave" => "\xF9", # small u, grave accent
122 "Uuml" => "\xDC", # capital U, dieresis or umlaut mark
123 "uuml" => "\xFC", # small u, dieresis or umlaut mark
124 "Yacute" => "\xDD", # capital Y, acute accent
125 "yacute" => "\xFD", # small y, acute accent
126 "yuml" => "\xFF", # small y, dieresis or umlaut mark
128 "laquo" => "\xAB", # left pointing double angle quotation mark
129 "lchevron" => "\xAB", # synonym (backwards compatibility)
130 "raquo" => "\xBB", # right pointing double angle quotation mark
131 "rchevron" => "\xBB", # synonym (backwards compatibility)
133 "iexcl" => "\xA1", # inverted exclamation mark
134 "cent" => "\xA2", # cent sign
135 "pound" => "\xA3", # (UK) pound sign
136 "curren" => "\xA4", # currency sign
137 "yen" => "\xA5", # yen sign
138 "brvbar" => "\xA6", # broken vertical bar
139 "sect" => "\xA7", # section sign
140 "uml" => "\xA8", # diaresis
141 "copy" => "\xA9", # Copyright symbol
142 "ordf" => "\xAA", # feminine ordinal indicator
143 "not" => "\xAC", # not sign
144 "shy" => '', # soft (discretionary) hyphen
145 "reg" => "\xAE", # registered trademark
146 "macr" => "\xAF", # macron, overline
147 "deg" => "\xB0", # degree sign
148 "plusmn" => "\xB1", # plus-minus sign
149 "sup2" => "\xB2", # superscript 2
150 "sup3" => "\xB3", # superscript 3
151 "acute" => "\xB4", # acute accent
152 "micro" => "\xB5", # micro sign
153 "para" => "\xB6", # pilcrow sign = paragraph sign
154 "middot" => "\xB7", # middle dot = Georgian comma
155 "cedil" => "\xB8", # cedilla
156 "sup1" => "\xB9", # superscript 1
157 "ordm" => "\xBA", # masculine ordinal indicator
158 "frac14" => "\xBC", # vulgar fraction one quarter
159 "frac12" => "\xBD", # vulgar fraction one half
160 "frac34" => "\xBE", # vulgar fraction three quarters
161 "iquest" => "\xBF", # inverted question mark
162 "times" => "\xD7", # multiplication sign
163 "divide" => "\xF7", # division sign
165 "nbsp" => "\x01", # non-breaking space
169 ##############################################################################
171 ##############################################################################
173 # Initialize the object. Must be sure to call our parent initializer.
177 $$self{alt} = 0 unless defined $$self{alt};
178 $$self{indent} = 4 unless defined $$self{indent};
179 $$self{loose} = 0 unless defined $$self{loose};
180 $$self{sentence} = 0 unless defined $$self{sentence};
181 $$self{width} = 76 unless defined $$self{width};
183 # Figure out what quotes we'll be using for C<> text.
184 $$self{quotes} ||= '"';
185 if ($$self{quotes} eq 'none') {
186 $$self{LQUOTE} = $$self{RQUOTE} = '';
187 } elsif (length ($$self{quotes}) == 1) {
188 $$self{LQUOTE} = $$self{RQUOTE} = $$self{quotes};
189 } elsif ($$self{quotes} =~ /^(.)(.)$/
190 || $$self{quotes} =~ /^(..)(..)$/) {
194 croak qq(Invalid quote specification "$$self{quotes}");
197 $$self{INDENTS} = []; # Stack of indentations.
198 $$self{MARGIN} = $$self{indent}; # Current left margin in spaces.
200 $self->SUPER::initialize;
202 # Tell Pod::Parser that we want the non-POD stuff too if code was set.
203 $self->parseopts ('-want_nonPODs' => 1) if $$self{code};
207 ##############################################################################
209 ##############################################################################
211 # Called for each command paragraph. Gets the command, the associated
212 # paragraph, the line number, and a Pod::Paragraph object. Just dispatches
213 # the command to a method named the same as the command. =cut is handled
214 # internally by Pod::Parser.
218 return if $command eq 'pod';
219 return if ($$self{EXCLUDE} && $command ne 'end');
220 $self->item ("\n") if defined $$self{ITEM};
221 if ($self->can ('cmd_' . $command)) {
222 $command = 'cmd_' . $command;
223 $self->$command (@_);
225 my ($text, $line, $paragraph) = @_;
227 ($file, $line) = $paragraph->file_line;
229 $text = " $text" if ($text =~ /^\S/);
230 warn qq($file:$line: Unknown command paragraph "=$command$text"\n);
235 # Called for a verbatim paragraph. Gets the paragraph, the line number, and a
236 # Pod::Paragraph object. Just output it verbatim, but with tabs converted to
240 return if $$self{EXCLUDE};
241 $self->item if defined $$self{ITEM};
244 s/^(\s*\S+)/(' ' x $$self{MARGIN}) . $1/gme;
248 # Called for a regular text block. Gets the paragraph, the line number, and a
249 # Pod::Paragraph object. Perform interpolation and output the results.
252 return if $$self{EXCLUDE};
253 $self->output ($_[0]), return if $$self{VERBATIM};
257 # Interpolate and output the paragraph.
258 $_ = $self->interpolate ($_, $line);
260 if (defined $$self{ITEM}) {
261 $self->item ($_ . "\n");
263 $self->output ($self->reformat ($_ . "\n"));
267 # Called for an interior sequence. Gets the command, argument, and a
268 # Pod::InteriorSequence object and is expected to return the resulting text.
269 # Calls code, bold, italic, file, and link to handle those types of sequences,
270 # and handles S<>, E<>, X<>, and Z<> directly.
271 sub interior_sequence {
273 my ($self, $command, $seq);
274 ($self, $command, $_, $seq) = @_;
276 # We have to defer processing of the inside of an L<> formatting code. If
277 # this sequence is nested inside an L<> sequence, return the literal raw
279 my $parent = $seq->nested;
280 while (defined $parent) {
281 return $seq->raw_text if ($parent->cmd_name eq 'L');
282 $parent = $parent->nested;
285 # Index entries are ignored in plain text.
286 return '' if ($command eq 'X' || $command eq 'Z');
288 # Expand escapes into the actual character now, warning if invalid.
289 if ($command eq 'E') {
293 return $ESCAPES{$_} if defined $ESCAPES{$_};
295 my ($file, $line) = $seq->file_line;
296 warn "$file:$line: Unknown escape: E<$_>\n";
301 # For all the other sequences, empty content produces no output.
304 # For S<>, compress all internal whitespace and then map spaces to \01.
305 # When we output the text, we'll map this back.
306 if ($command eq 'S') {
312 # Anything else needs to get dispatched to another method.
313 if ($command eq 'B') { return $self->seq_b ($_) }
314 elsif ($command eq 'C') { return $self->seq_c ($_) }
315 elsif ($command eq 'F') { return $self->seq_f ($_) }
316 elsif ($command eq 'I') { return $self->seq_i ($_) }
317 elsif ($command eq 'L') { return $self->seq_l ($_, $seq) }
320 my ($file, $line) = $seq->file_line;
321 warn "$file:$line: Unknown sequence $command<$_>\n";
325 # Called for each paragraph that's actually part of the POD. We take
326 # advantage of this opportunity to untabify the input. Also, if given the
327 # code option, we may see paragraphs that aren't part of the POD and need to
328 # output them directly.
329 sub preprocess_paragraph {
332 1 while s/^(.*?)(\t+)/$1 . ' ' x (length ($2) * 8 - length ($1) % 8)/me;
333 $self->output_code ($_) if $self->cutting;
338 ##############################################################################
340 ##############################################################################
342 # All command paragraphs take the paragraph and the line number.
344 # First level heading.
349 $_ = $self->interpolate ($_, shift);
351 $self->output ("\n==== $_ ====\n\n");
353 $_ .= "\n" if $$self{loose};
354 $self->output ($_ . "\n");
358 # Second level heading.
363 $_ = $self->interpolate ($_, shift);
365 $self->output ("\n== $_ ==\n\n");
367 $self->output (' ' x ($$self{indent} / 2) . $_ . "\n\n");
371 # Third level heading.
376 $_ = $self->interpolate ($_, shift);
378 $self->output ("\n= $_ =\n\n");
380 $self->output (' ' x ($$self{indent} * 2 / 3 + 0.5) . $_ . "\n\n");
384 # Third level heading.
389 $_ = $self->interpolate ($_, shift);
391 $self->output ("\n- $_ -\n\n");
393 $self->output (' ' x ($$self{indent} * 3 / 4 + 0.5) . $_ . "\n\n");
401 unless (/^[-+]?\d+\s+$/) { $_ = $$self{indent} }
402 push (@{ $$self{INDENTS} }, $$self{MARGIN});
403 $$self{MARGIN} += ($_ + 0);
408 my ($self, $text, $line, $paragraph) = @_;
409 $$self{MARGIN} = pop @{ $$self{INDENTS} };
410 unless (defined $$self{MARGIN}) {
412 ($file, $line) = $paragraph->file_line;
413 warn "$file:$line: Unmatched =back\n";
414 $$self{MARGIN} = $$self{indent};
418 # An individual list item.
421 if (defined $$self{ITEM}) { $self->item }
424 $$self{ITEM} = $self->interpolate ($_);
427 # Begin a block for a particular translator. Setting VERBATIM triggers
428 # special handling in textblock().
432 my ($kind) = /^(\S+)/ or return;
433 if ($kind eq 'text') {
434 $$self{VERBATIM} = 1;
440 # End a block for a particular translator. We assume that all =begin/=end
441 # pairs are properly closed.
445 $$self{VERBATIM} = 0;
448 # One paragraph for a particular translator. Ignore it unless it's intended
449 # for text, in which case we treat it as a verbatim text block.
454 return unless s/^text\b[ \t]*\n?//;
455 $self->verbatim ($_, $line);
459 ##############################################################################
461 ##############################################################################
463 # The simple formatting ones. These are here mostly so that subclasses can
464 # override them and do more complicated things.
465 sub seq_b { return $_[0]{alt} ? "``$_[1]''" : $_[1] }
466 sub seq_f { return $_[0]{alt} ? "\"$_[1]\"" : $_[1] }
467 sub seq_i { return '*' . $_[1] . '*' }
469 # Apply a whole bunch of messy heuristics to not quote things that don't
470 # benefit from being quoted. These originally come from Barrie Slaymaker and
471 # largely duplicate code in Pod::Man.
476 # A regex that matches the portion of a variable reference that's the
477 # array or hash index, separated out just because we want to use it in
478 # several places in the following regex.
479 my $index = '(?: \[.*\] | \{.*\} )?';
481 # Check for things that we don't want to quote, and if we find any of
482 # them, return the string with just a font change and no quoting.
486 ( [\'\`\"] ) .* \1 # already quoted
487 | \` .* \' # `quoted'
488 | \$+ [\#^]? \S $index # special ($^Foo, $")
489 | [\$\@%&*]+ \#? [:\'\w]+ $index # plain var or func
490 | [\$\@%&*]* [:\'\w]+ (?: -> )? \(\s*[^\s,]\s*\) # 0/1-arg func call
491 | [+-]? [\d.]+ (?: [eE] [+-]? \d+ )? # a number
492 | 0x [a-fA-F\d]+ # a hex constant
497 # If we didn't return, go ahead and quote the text.
498 return $$self{alt} ? "``$_''" : "$$self{LQUOTE}$_$$self{RQUOTE}";
501 # Handle links. Since this is plain text, we can't actually make any real
502 # links, so this is all to figure out what text we print out. Most of the
503 # work is done by Pod::ParseLink.
505 my ($self, $link, $seq) = @_;
506 my ($text, $type) = (parselink ($link))[1,4];
507 my ($file, $line) = $seq->file_line;
508 $text = $self->interpolate ($text, $line);
509 $text = '<' . $text . '>' if $type eq 'url';
514 ##############################################################################
516 ##############################################################################
518 # This method is called whenever an =item command is complete (in other words,
519 # we've seen its associated paragraph or know for certain that it doesn't have
520 # one). It gets the paragraph associated with the item as an argument. If
521 # that argument is empty, just output the item tag; if it contains a newline,
522 # output the item tag followed by the newline. Otherwise, see if there's
523 # enough room for us to output the item tag in the margin of the text or if we
524 # have to put it on a separate line.
528 my $tag = $$self{ITEM};
529 unless (defined $tag) {
530 carp "Item called without tag";
534 my $indent = $$self{INDENTS}[-1];
535 unless (defined $indent) { $indent = $$self{indent} }
536 my $space = ' ' x $indent;
537 $space =~ s/^ /:/ if $$self{alt};
538 if (!$_ || /^\s+$/ || ($$self{MARGIN} - $indent < length ($tag) + 1)) {
539 my $margin = $$self{MARGIN};
540 $$self{MARGIN} = $indent;
541 my $output = $self->reformat ($tag);
542 $output =~ s/\n*$/\n/;
543 $self->output ($output);
544 $$self{MARGIN} = $margin;
545 $self->output ($self->reformat ($_)) if /\S/;
547 $_ = $self->reformat ($_);
548 s/^ /:/ if ($$self{alt} && $indent > 0);
549 my $tagspace = ' ' x length $tag;
550 s/^($space)$tagspace/$1$tag/ or warn "Bizarre space in item";
556 ##############################################################################
558 ##############################################################################
560 # Wrap a line, indenting by the current left margin. We can't use Text::Wrap
561 # because it plays games with tabs. We can't use formline, even though we'd
562 # really like to, because it screws up non-printing characters. So we have to
563 # do the wrapping ourselves.
568 my $spaces = ' ' x $$self{MARGIN};
569 my $width = $$self{width} - $$self{MARGIN};
570 while (length > $width) {
571 if (s/^([^\n]{0,$width})\s+// || s/^([^\n]{$width})//) {
572 $output .= $spaces . $1 . "\n";
577 $output .= $spaces . $_;
578 $output =~ s/\s+$/\n\n/;
582 # Reformat a paragraph of text for the current margin. Takes the text to
583 # reformat and returns the formatted text.
588 # If we're trying to preserve two spaces after sentences, do some munging
589 # to support that. Otherwise, smash all repeated whitespace.
590 if ($$self{sentence}) {
601 # Output text to the output device.
602 sub output { $_[1] =~ tr/\01/ /; print { $_[0]->output_handle } $_[1] }
604 # Output a block of code (something that isn't part of the POD text). Called
605 # by preprocess_paragraph only if we were given the code option. Exists here
606 # only so that it can be overridden by subclasses.
607 sub output_code { $_[0]->output ($_[1]) }
610 ##############################################################################
611 # Backwards compatibility
612 ##############################################################################
614 # The old Pod::Text module did everything in a pod2text() function. This
615 # tries to provide the same interface for legacy applications.
619 # This is really ugly; I hate doing option parsing in the middle of a
620 # module. But the old Pod::Text module supported passing flags to its
621 # entry function, so handle -a and -<number>.
622 while ($_[0] =~ /^-/) {
624 if ($flag eq '-a') { push (@args, alt => 1) }
625 elsif ($flag =~ /^-(\d+)$/) { push (@args, width => $1) }
632 # Now that we know what arguments we're using, create the parser.
633 my $parser = Pod::Text->new (@args);
635 # If two arguments were given, the second argument is going to be a file
636 # handle. That means we want to call parse_from_filehandle(), which means
637 # we need to turn the first argument into a file handle. Magic open will
638 # handle the <&STDIN case automagically.
642 unless (open (IN, $fhs[0])) {
643 croak ("Can't open $fhs[0] for reading: $!\n");
647 return $parser->parse_from_filehandle (@fhs);
649 return $parser->parse_from_file (@_);
654 ##############################################################################
655 # Module return value and documentation
656 ##############################################################################
663 Pod::Text - Convert POD data to formatted ASCII text
668 my $parser = Pod::Text->new (sentence => 0, width => 78);
670 # Read POD from STDIN and write to STDOUT.
671 $parser->parse_from_filehandle;
673 # Read POD from file.pod and write to file.txt.
674 $parser->parse_from_file ('file.pod', 'file.txt');
678 Pod::Text is a module that can convert documentation in the POD format (the
679 preferred language for documenting Perl) into formatted ASCII. It uses no
680 special formatting controls or codes whatsoever, and its output is therefore
681 suitable for nearly any device.
683 As a derived class from Pod::Parser, Pod::Text supports the same methods and
684 interfaces. See L<Pod::Parser> for all the details; briefly, one creates a
685 new parser with C<< Pod::Text->new() >> and then calls either
686 parse_from_filehandle() or parse_from_file().
688 new() can take options, in the form of key/value pairs, that control the
689 behavior of the parser. The currently recognized options are:
695 If set to a true value, selects an alternate output format that, among other
696 things, uses a different heading style and marks C<=item> entries with a
697 colon in the left margin. Defaults to false.
701 If set to a true value, the non-POD parts of the input file will be included
702 in the output. Useful for viewing code documented with POD blocks with the
703 POD rendered and the code left intact.
707 The number of spaces to indent regular text, and the default indentation for
708 C<=over> blocks. Defaults to 4.
712 If set to a true value, a blank line is printed after a C<=head1> heading.
713 If set to false (the default), no blank line is printed after C<=head1>,
714 although one is still printed after C<=head2>. This is the default because
715 it's the expected formatting for manual pages; if you're formatting
716 arbitrary text documents, setting this to true may result in more pleasing
721 Sets the quote marks used to surround CE<lt>> text. If the value is a
722 single character, it is used as both the left and right quote; if it is two
723 characters, the first character is used as the left quote and the second as
724 the right quoted; and if it is four characters, the first two are used as
725 the left quote and the second two as the right quote.
727 This may also be set to the special value C<none>, in which case no quote
728 marks are added around CE<lt>> text.
732 If set to a true value, Pod::Text will assume that each sentence ends in two
733 spaces, and will try to preserve that spacing. If set to false, all
734 consecutive whitespace in non-verbatim paragraphs is compressed into a
735 single space. Defaults to true.
739 The column at which to wrap text on the right-hand side. Defaults to 76.
743 The standard Pod::Parser method parse_from_filehandle() takes up to two
744 arguments, the first being the file handle to read POD from and the second
745 being the file handle to write the formatted output to. The first defaults
746 to STDIN if not given, and the second defaults to STDOUT. The method
747 parse_from_file() is almost identical, except that its two arguments are the
748 input and output disk files instead. See L<Pod::Parser> for the specific
755 =item Bizarre space in item
757 =item Item called without tag
759 (W) Something has gone wrong in internal C<=item> processing. These
760 messages indicate a bug in Pod::Text; you should never see them.
762 =item Can't open %s for reading: %s
764 (F) Pod::Text was invoked via the compatibility mode pod2text() interface
765 and the input file it was given could not be opened.
767 =item Invalid quote specification "%s"
769 (F) The quote specification given (the quotes option to the constructor) was
770 invalid. A quote specification must be one, two, or four characters long.
772 =item %s:%d: Unknown command paragraph "%s".
774 (W) The POD source contained a non-standard command paragraph (something of
775 the form C<=command args>) that Pod::Man didn't know about. It was ignored.
777 =item %s:%d: Unknown escape: %s
779 (W) The POD source contained an C<EE<lt>E<gt>> escape that Pod::Text didn't
782 =item %s:%d: Unknown sequence: %s
784 (W) The POD source contained a non-standard internal sequence (something of
785 the form C<XE<lt>E<gt>>) that Pod::Text didn't know about.
787 =item %s:%d: Unmatched =back
789 (W) Pod::Text encountered a C<=back> command that didn't correspond to an
796 Embedded Ctrl-As (octal 001) in the input will be mapped to spaces on
797 output, due to an internal implementation detail.
801 This is a replacement for an earlier Pod::Text module written by Tom
802 Christiansen. It has a revamped interface, since it now uses Pod::Parser,
803 but an interface roughly compatible with the old Pod::Text::pod2text()
804 function is still available. Please change to the new calling convention,
807 The original Pod::Text contained code to do formatting via termcap
808 sequences, although it wasn't turned on by default and it was problematic to
809 get it to work at all. This rewrite doesn't even try to do that, but a
810 subclass of it does. Look for L<Pod::Text::Termcap>.
814 L<Pod::Parser>, L<Pod::Text::Termcap>, L<pod2text(1)>
818 Russ Allbery <rra@stanford.edu>, based I<very> heavily on the original
819 Pod::Text by Tom Christiansen <tchrist@mox.perl.com> and its conversion to
820 Pod::Parser by Brad Appleton <bradapp@enteract.com>.
822 =head1 COPYRIGHT AND LICENSE
824 Copyright 1999, 2000, 2001 by Russ Allbery <rra@stanford.edu>.
826 This program is free software; you may redistribute it and/or modify it
827 under the same terms as Perl itself.