summaryrefslogtreecommitdiff
path: root/lib/Pod/Man.pm
blob: 439b22c35b0a8c512a0df6319e86769030b21288 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
# Pod::Man -- Convert POD data to formatted *roff input.
# $Id: Man.pm,v 1.4 2000/04/26 04:03:41 eagle Exp $
#
# Copyright 1999, 2000 by Russ Allbery <rra@stanford.edu>
#
# This program is free software; you can redistribute it and/or modify it
# under the same terms as Perl itself.
#
# This module is intended to be a replacement for the pod2man script
# distributed with versions of Perl prior to 5.6, and attempts to match its
# output except for some specific circumstances where other decisions seemed
# to produce better output.  It uses Pod::Parser and is designed to be easy
# to subclass.
#
# Perl core hackers, please note that this module is also separately
# maintained outside of the Perl core as part of the podlators.  Please send
# me any patches at the address above in addition to sending them to the
# standard Perl mailing lists.

############################################################################
# Modules and declarations
############################################################################

package Pod::Man;

require 5.004;

use Carp qw(carp croak);
use Pod::Parser ();

use strict;
use subs qw(makespace);
use vars qw(@ISA %ESCAPES $PREAMBLE $VERSION);

@ISA = qw(Pod::Parser);

# Don't use the CVS revision as the version, since this module is also in
# Perl core and too many things could munge CVS magic revision strings.
# This number should ideally be the same as the CVS revision in podlators,
# however.
$VERSION = 1.04;


############################################################################
# Preamble and *roff output tables
############################################################################

# The following is the static preamble which starts all *roff output we
# generate.  It's completely static except for the font to use as a
# fixed-width font, which is designed by @CFONT@.  $PREAMBLE should
# therefore be run through s/\@CFONT\@/<font>/g before output.
$PREAMBLE = <<'----END OF PREAMBLE----';
.de Sh \" Subsection heading
.br
.if t .Sp
.ne 5
.PP
\fB\\$1\fR
.PP
..
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Ip \" List item
.br
.ie \\n(.$>=3 .ne \\$3
.el .ne 3
.IP "\\$1" \\$2
..
.de Vb \" Begin verbatim text
.ft @CFONT@
.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.  | will give a
.\" real vertical bar.  \*(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-|\(bv\*(Tr
.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\}
.\"
.\" If the F register is turned on, we'll generate index entries on stderr
.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and
.\" index entries marked with X<> in POD.  Of course, you'll have to process
.\" the output yourself in some meaningful fashion.
.if \nF \{\
.    de IX
.    tm Index:\\$1\t\\n%\t"\\$2"
..
.    nr % 0
.    rr F
.\}
.\"
.\" For nroff, turn off justification.  Always turn off hyphenation; it
.\" makes way too many mistakes in technical documents.
.hy 0
.if n .na
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.bd B 3
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
----END OF PREAMBLE----
                                   
# This table is taken nearly verbatim from Tom Christiansen's pod2man.  It
# assumes that the standard preamble has already been printed, since that's
# what defines all of the accent marks.  Note that some of these are quoted
# with double quotes since they contain embedded single quotes, so use \\
# uniformly for backslash for readability.
%ESCAPES = (
    'amp'       =>    '&',      # ampersand
    'lt'        =>    '<',      # left chevron, less-than
    'gt'        =>    '>',      # right chevron, greater-than
    'quot'      =>    '"',      # double quote
    'sol'       =>    '/',      # solidus
    'verbar'    =>    '|',      # vertical bar

    'Aacute'    =>    "A\\*'",  # capital A, acute accent
    'aacute'    =>    "a\\*'",  # small a, acute accent
    'Acirc'     =>    'A\\*^',  # capital A, circumflex accent
    'acirc'     =>    'a\\*^',  # small a, circumflex accent
    'AElig'     =>    '\*(AE',  # capital AE diphthong (ligature)
    'aelig'     =>    '\*(ae',  # small ae diphthong (ligature)
    'Agrave'    =>    "A\\*`",  # capital A, grave accent
    'agrave'    =>    "A\\*`",  # small a, grave accent
    'Aring'     =>    'A\\*o',  # capital A, ring
    'aring'     =>    'a\\*o',  # small a, ring
    'Atilde'    =>    'A\\*~',  # capital A, tilde
    'atilde'    =>    'a\\*~',  # small a, tilde
    'Auml'      =>    'A\\*:',  # capital A, dieresis or umlaut mark
    'auml'      =>    'a\\*:',  # small a, dieresis or umlaut mark
    'Ccedil'    =>    'C\\*,',  # capital C, cedilla
    'ccedil'    =>    'c\\*,',  # small c, cedilla
    'Eacute'    =>    "E\\*'",  # capital E, acute accent
    'eacute'    =>    "e\\*'",  # small e, acute accent
    'Ecirc'     =>    'E\\*^',  # capital E, circumflex accent
    'ecirc'     =>    'e\\*^',  # small e, circumflex accent
    'Egrave'    =>    'E\\*`',  # capital E, grave accent
    'egrave'    =>    'e\\*`',  # small e, grave accent
    'ETH'       =>    '\\*(D-', # capital Eth, Icelandic
    'eth'       =>    '\\*(d-', # small eth, Icelandic
    'Euml'      =>    'E\\*:',  # capital E, dieresis or umlaut mark
    'euml'      =>    'e\\*:',  # small e, dieresis or umlaut mark
    'Iacute'    =>    "I\\*'",  # capital I, acute accent
    'iacute'    =>    "i\\*'",  # small i, acute accent
    'Icirc'     =>    'I\\*^',  # capital I, circumflex accent
    'icirc'     =>    'i\\*^',  # small i, circumflex accent
    'Igrave'    =>    'I\\*`',  # capital I, grave accent
    'igrave'    =>    'i\\*`',  # small i, grave accent
    'Iuml'      =>    'I\\*:',  # capital I, dieresis or umlaut mark
    'iuml'      =>    'i\\*:',  # small i, dieresis or umlaut mark
    'Ntilde'    =>    'N\*~',   # capital N, tilde
    'ntilde'    =>    'n\*~',   # small n, tilde
    'Oacute'    =>    "O\\*'",  # capital O, acute accent
    'oacute'    =>    "o\\*'",  # small o, acute accent
    'Ocirc'     =>    'O\\*^',  # capital O, circumflex accent
    'ocirc'     =>    'o\\*^',  # small o, circumflex accent
    'Ograve'    =>    'O\\*`',  # capital O, grave accent
    'ograve'    =>    'o\\*`',  # small o, grave accent
    'Oslash'    =>    'O\\*/',  # capital O, slash
    'oslash'    =>    'o\\*/',  # small o, slash
    'Otilde'    =>    'O\\*~',  # capital O, tilde
    'otilde'    =>    'o\\*~',  # small o, tilde
    'Ouml'      =>    'O\\*:',  # capital O, dieresis or umlaut mark
    'ouml'      =>    'o\\*:',  # small o, dieresis or umlaut mark
    'szlig'     =>    '\*8',    # small sharp s, German (sz ligature)
    'THORN'     =>    '\\*(Th', # capital THORN, Icelandic
    'thorn'     =>    '\\*(th', # small thorn, Icelandic
    'Uacute'    =>    "U\\*'",  # capital U, acute accent
    'uacute'    =>    "u\\*'",  # small u, acute accent
    'Ucirc'     =>    'U\\*^',  # capital U, circumflex accent
    'ucirc'     =>    'u\\*^',  # small u, circumflex accent
    'Ugrave'    =>    'U\\*`',  # capital U, grave accent
    'ugrave'    =>    'u\\*`',  # small u, grave accent
    'Uuml'      =>    'U\\*:',  # capital U, dieresis or umlaut mark
    'uuml'      =>    'u\\*:',  # small u, dieresis or umlaut mark
    'Yacute'    =>    "Y\\*'",  # capital Y, acute accent
    'yacute'    =>    "y\\*'",  # small y, acute accent
    'yuml'      =>    'y\\*:',  # small y, dieresis or umlaut mark
);


############################################################################
# Static helper functions
############################################################################

# Protect leading quotes and periods against interpretation as commands.
# Also protect anything starting with a backslash, since it could expand
# or hide something that *roff would interpret as a command.  This is
# overkill, but it's much simpler than trying to parse *roff here.
sub protect {
    local $_ = shift;
    s/^([.\'\\])/\\&$1/mg;
    $_;
}
                    
# Given a command and a single argument that may or may not contain double
# quotes, handle double-quote formatting for it.  If there are no double
# quotes, just return the command followed by the argument in double quotes.
# If there are double quotes, use an if statement to test for nroff, and for
# nroff output the command followed by the argument in double quotes with
# embedded double quotes doubled.  For other formatters, remap paired double
# quotes to `` and ''.
sub switchquotes {
    my $command = shift;
    local $_ = shift;
    my $extra = shift;
    s/\\\*\([LR]\"/\"/g;
    if (/\"/) {
        s/\"/\"\"/g;
        my $troff = $_;
        $troff =~ s/\"\"([^\"]*)\"\"/\`\`$1\'\'/g;
        s/\"/\"\"/g if $extra;
        $troff =~ s/\"/\"\"/g if $extra;
        $_ = qq("$_") . ($extra ? " $extra" : '');
        $troff = qq("$troff") . ($extra ? " $extra" : '');
        return ".if n $command $_\n.el $command $troff\n";
    } else {
        $_ = qq("$_") . ($extra ? " $extra" : '');
        return "$command $_\n";
    }
}

# Translate a font string into an escape.
sub toescape { (length ($_[0]) > 1 ? '\f(' : '\f') . $_[0] }

                    
############################################################################
# Initialization
############################################################################

# Initialize the object.  Here, we also process any additional options
# passed to the constructor or set up defaults if none were given.  center
# is the centered title, release is the version number, and date is the date
# for the documentation.  Note that we can't know what file name we're
# processing due to the architecture of Pod::Parser, so that *has* to either
# be passed to the constructor or set separately with Pod::Man::name().
sub initialize {
    my $self = shift;

    # Figure out the fixed-width font.  If user-supplied, make sure that
    # they are the right length.
    for (qw/fixed fixedbold fixeditalic fixedbolditalic/) {
        if (defined $$self{$_}) {
            if (length ($$self{$_}) < 1 || length ($$self{$_}) > 2) {
                croak "roff font should be 1 or 2 chars, not `$$self{$_}'";
            }
        } else {
            $$self{$_} = '';
        }
    }

    # Set the default fonts.  We can't be sure what fixed bold-italic is
    # going to be called, so default to just bold.
    $$self{fixed}           ||= 'CW';
    $$self{fixedbold}       ||= 'CB';
    $$self{fixeditalic}     ||= 'CI';
    $$self{fixedbolditalic} ||= 'CB';

    # Set up a table of font escapes.  First number is fixed-width, second
    # is bold, third is italic.
    $$self{FONTS} = { '000' => '\fR', '001' => '\fI',
                      '010' => '\fB', '011' => '\f(BI',
                      '100' => toescape ($$self{fixed}),
                      '101' => toescape ($$self{fixeditalic}),
                      '110' => toescape ($$self{fixedbold}),
                      '111' => toescape ($$self{fixedbolditalic})};

    # Extra stuff for page titles.
    $$self{center} = 'User Contributed Perl Documentation'
        unless defined $$self{center};
    $$self{indent}  = 4 unless defined $$self{indent};

    # We used to try first to get the version number from a local binary,
    # but we shouldn't need that any more.  Get the version from the running
    # Perl.  Work a little magic to handle subversions correctly under both
    # the pre-5.6 and the post-5.6 version numbering schemes.
    if (!defined $$self{release}) {
        my @version = ($] =~ /^(\d+)\.(\d{3})(\d{0,3})$/);
        $version[2] ||= 0;
        $version[2] *= 10 ** (3 - length $version[2]);
        for (@version) { $_ += 0 }
        $$self{release} = 'perl v' . join ('.', @version);
    }

    # Double quotes in things that will be quoted.
    for (qw/center date release/) {
        $$self{$_} =~ s/\"/\"\"/g if $$self{$_};
    }

    $$self{INDENT}  = 0;        # Current indentation level.
    $$self{INDENTS} = [];       # Stack of indentations.
    $$self{INDEX}   = [];       # Index keys waiting to be printed.

    $self->SUPER::initialize;
}

# For each document we process, output the preamble first.  Note that the
# fixed width font is a global default; once we interpolate it into the
# PREAMBLE, it ain't ever changing.  Maybe fix this later.
sub begin_pod {
    my $self = shift;

    # Try to figure out the name and section from the file name.
    my $section = $$self{section} || 1;
    my $name = $$self{name};
    if (!defined $name) {
        $name = $self->input_file;
        $section = 3 if (!$$self{section} && $name =~ /\.pm\z/i);
        $name =~ s/\.p(od|[lm])\z//i;
        if ($section =~ /^1/) {
            require File::Basename;
            $name = uc File::Basename::basename ($name);
        } else {
            # Lose everything up to the first of
            #     */lib/*perl*      standard or site_perl module
            #     */*perl*/lib      from -D prefix=/opt/perl
            #     */*perl*/         random module hierarchy
            # which works.  Should be fixed to use File::Spec.  Also handle
            # a leading lib/ since that's what ExtUtils::MakeMaker creates.
            for ($name) {
                s%//+%/%g;
                if (     s%^.*?/lib/[^/]*perl[^/]*/%%si
                      or s%^.*?/[^/]*perl[^/]*/(?:lib/)?%%si) {
                    s%^site(_perl)?/%%s;      # site and site_perl
                    s%^(.*-$^O|$^O-.*)/%%so;  # arch
                    s%^\d+\.\d+%%s;           # version
                }
                s%^lib/%%;
                s%/%::%g;
            }
        }
    }

    # Modification date header.  Try to use the modification time of our
    # input.
    if (!defined $$self{date}) {
        my $time = (stat $self->input_file)[9] || time;
        my ($day, $month, $year) = (localtime $time)[3,4,5];
        $month++;
        $year += 1900;
        $$self{date} = sprintf ('%4d-%02d-%02d', $year, $month, $day);
    }

    # Now, print out the preamble and the title.
    $PREAMBLE =~ s/\@CFONT\@/$$self{fixed}/;
    chomp $PREAMBLE;
    print { $self->output_handle } <<"----END OF HEADER----";
.\\" Automatically generated by Pod::Man version $VERSION
.\\" @{[ scalar localtime ]}
.\\"
.\\" Standard preamble:
.\\" ======================================================================
$PREAMBLE
.\\" ======================================================================
.\\"
.IX Title "$name $section"
.TH $name $section "$$self{release}" "$$self{date}" "$$self{center}"
.UC
----END OF HEADER----
#"# for cperl-mode

    # Initialize a few per-file variables.
    $$self{INDENT} = 0;
    $$self{NEEDSPACE} = 0;
}


############################################################################
# Core overrides
############################################################################

# Called for each command paragraph.  Gets the command, the associated
# paragraph, the line number, and a Pod::Paragraph object.  Just dispatches
# the command to a method named the same as the command.  =cut is handled
# internally by Pod::Parser.
sub command {
    my $self = shift;
    my $command = shift;
    return if $command eq 'pod';
    return if ($$self{EXCLUDE} && $command ne 'end');
    $command = 'cmd_' . $command;
    $self->$command (@_);
}

# Called for a verbatim paragraph.  Gets the paragraph, the line number, and
# a Pod::Paragraph object.  Rofficate backslashes, untabify, put a
# zero-width character at the beginning of each line to protect against
# commands, and wrap in .Vb/.Ve.
sub verbatim {
    my $self = shift;
    return if $$self{EXCLUDE};
    local $_ = shift;
    return if /^\s+$/;
    s/\s+$/\n/;
    my $lines = tr/\n/\n/;
    1 while s/^(.*?)(\t+)/$1 . ' ' x (length ($2) * 8 - length ($1) % 8)/me;
    s/\\/\\e/g;
    s/^(\s*\S)/'\&' . $1/gme;
    $self->makespace if $$self{NEEDSPACE};
    $self->output (".Vb $lines\n$_.Ve\n");
    $$self{NEEDSPACE} = 0;
}

# Called for a regular text block.  Gets the paragraph, the line number, and
# a Pod::Paragraph object.  Perform interpolation and output the results.
sub textblock {
    my $self = shift;
    return if $$self{EXCLUDE};
    $self->output ($_[0]), return if $$self{VERBATIM};

    # Perform a little magic to collapse multiple L<> references.  We'll
    # just rewrite the whole thing into actual text at this part, bypassing
    # the whole internal sequence parsing thing.
    my $text = shift;
    $text =~ s{
        (L<                     # A link of the form L</something>.
              /
              (
                  [:\w]+        # The item has to be a simple word...
                  (\(\))?       # ...or simple function.
              )
          >
          (
              ,?\s+(and\s+)?    # Allow lots of them, conjuncted.
              L<  
                  /
                  ( [:\w]+ ( \(\) )? )
              >
          )+
        )
    } {
        local $_ = $1;
        s{ L< / ( [^>]+ ) > } {$1}xg;
        my @items = split /(?:,?\s+(?:and\s+)?)/;
        my $string = 'the ';
        my $i;
        for ($i = 0; $i < @items; $i++) {
            $string .= $items[$i];
            $string .= ', ' if @items > 2 && $i != $#items;
            $string .= ' ' if @items == 2 && $i == 2;
            $string .= 'and ' if ($i == $#items - 1);
        }
        $string .= ' entries elsewhere in this document';
        $string;
    }gex;

    # Parse the tree and output it.  collapse knows about references to
    # scalars as well as scalars and does the right thing with them.
    $text = $self->parse ($text, @_);
    $text =~ s/\n\s*$/\n/;
    $self->makespace if $$self{NEEDSPACE};
    $self->output (protect $self->mapfonts ($text));
    $self->outindex;
    $$self{NEEDSPACE} = 1;
}

# Called for an interior sequence.  Takes a Pod::InteriorSequence object and
# returns a reference to a scalar.  This scalar is the final formatted text.
# It's returned as a reference so that other interior sequences above us
# know that the text has already been processed.
sub sequence {
    my ($self, $seq) = @_;
    my $command = $seq->cmd_name;

    # Zero-width characters.
    if ($command eq 'Z') {
        # Workaround to generate a blessable reference, needed by 5.005.
        my $tmp = '\&';
        return bless \ "$tmp", 'Pod::Man::String';
    }

    # C<>, L<>, X<>, and E<> don't apply guesswork to their contents.  C<>
    # needs some additional special handling.
    my $literal = ($command =~ /^[CELX]$/);
    $literal++ if $command eq 'C';
    local $_ = $self->collapse ($seq->parse_tree, $literal);

    # Handle E<> escapes.
    if ($command eq 'E') {
        if (/^\d+$/) {
            return bless \ chr ($_), 'Pod::Man::String';
        } elsif (exists $ESCAPES{$_}) {
            return bless \ "$ESCAPES{$_}", 'Pod::Man::String';
        } else {
            carp "Unknown escape E<$1>";
            return bless \ "E<$_>", 'Pod::Man::String';
        }
    }

    # For all the other sequences, empty content produces no output.
    return '' if $_ eq '';

    # Handle formatting sequences.
    if ($command eq 'B') {
        return bless \ ('\f(BS' . $_ . '\f(BE'), 'Pod::Man::String';
    } elsif ($command eq 'F') {
        return bless \ ('\f(IS' . $_ . '\f(IE'), 'Pod::Man::String';
    } elsif ($command eq 'I') {
        return bless \ ('\f(IS' . $_ . '\f(IE'), 'Pod::Man::String';
    } elsif ($command eq 'C') {
        return bless \ ('\f(FS\*(C`' . $_ . "\\*(C'\\f(FE"),
            'Pod::Man::String';
    }

    # Handle links.
    if ($command eq 'L') {
        # A bug in lvalue subs in 5.6 requires the temporary variable.
        my $tmp = $self->buildlink ($_);
        return bless \ "$tmp", 'Pod::Man::String';
    }
                         
    # Whitespace protection replaces whitespace with "\ ".
    if ($command eq 'S') {
        s/\s+/\\ /g;
        return bless \ "$_", 'Pod::Man::String';
    }

    # Add an index entry to the list of ones waiting to be output.
    if ($command eq 'X') { push (@{ $$self{INDEX} }, $_); return '' }

    # Anything else is unknown.
    carp "Unknown sequence $command<$_>";
}


############################################################################
# Command paragraphs
############################################################################

# All command paragraphs take the paragraph and the line number.

# First level heading.  We can't output .IX in the NAME section due to a bug
# in some versions of catman, so don't output a .IX for that section.  .SH
# already uses small caps, so remove any E<> sequences that would cause
# them.
sub cmd_head1 {
    my $self = shift;
    local $_ = $self->parse (@_);
    s/\s+$//;
    s/\\s-?\d//g;
    $self->output (switchquotes ('.SH', $self->mapfonts ($_)));
    $self->outindex (($_ eq 'NAME') ? () : ('Header', $_));
    $$self{NEEDSPACE} = 0;
}

# Second level heading.
sub cmd_head2 {
    my $self = shift;
    local $_ = $self->parse (@_);
    s/\s+$//;
    $self->output (switchquotes ('.Sh', $self->mapfonts ($_)));
    $self->outindex ('Subsection', $_);
    $$self{NEEDSPACE} = 0;
}

# Start a list.  For indents after the first, wrap the outside indent in .RS
# so that hanging paragraph tags will be correct.
sub cmd_over {
    my $self = shift;
    local $_ = shift;
    unless (/^[-+]?\d+\s+$/) { $_ = $$self{indent} }
    if (@{ $$self{INDENTS} } > 0) {
        $self->output (".RS $$self{INDENT}\n");
    }
    push (@{ $$self{INDENTS} }, $$self{INDENT});
    $$self{INDENT} = ($_ + 0);
}

# End a list.  If we've closed an embedded indent, we've mangled the hanging
# paragraph indent, so temporarily replace it with .RS and set WEIRDINDENT.
# We'll close that .RS at the next =back or =item.
sub cmd_back {
    my $self = shift;
    $$self{INDENT} = pop @{ $$self{INDENTS} };
    unless (defined $$self{INDENT}) {
        carp "Unmatched =back";
        $$self{INDENT} = 0;
    }
    if ($$self{WEIRDINDENT}) {
        $self->output (".RE\n");
        $$self{WEIRDINDENT} = 0;
    }
    if (@{ $$self{INDENTS} } > 0) {
        $self->output (".RE\n");
        $self->output (".RS $$self{INDENT}\n");
        $$self{WEIRDINDENT} = 1;
    }
    $$self{NEEDSPACE} = 1;
}

# An individual list item.  Emit an index entry for anything that's
# interesting, but don't emit index entries for things like bullets and
# numbers.  rofficate bullets too while we're at it (so for nice output, use
# * for your lists rather than o or . or - or some other thing).  Newlines
# in an item title are turned into spaces since *roff can't handle them
# embedded.
sub cmd_item {
    my $self = shift;
    local $_ = $self->parse (@_);
    s/\s+$//;
    s/\s*\n\s*/ /g;
    my $index;
    if (/\w/ && !/^\w[.\)]\s*$/) {
        $index = $_;
        $index =~ s/^\s*[-*+o.]?\s*//;
    }
    s/^\*(\s|\Z)/\\\(bu$1/;
    if ($$self{WEIRDINDENT}) {
        $self->output (".RE\n");
        $$self{WEIRDINDENT} = 0;
    }
    $_ = $self->mapfonts ($_);
    $self->output (switchquotes ('.Ip', $_, $$self{INDENT}));
    $self->outindex ($index ? ('Item', $index) : ());
    $$self{NEEDSPACE} = 0;
}

# Begin a block for a particular translator.  Setting VERBATIM triggers
# special handling in textblock().
sub cmd_begin {
    my $self = shift;
    local $_ = shift;
    my ($kind) = /^(\S+)/ or return;
    if ($kind eq 'man' || $kind eq 'roff') {
        $$self{VERBATIM} = 1;
    } else {
        $$self{EXCLUDE} = 1;
    }
}

# End a block for a particular translator.  We assume that all =begin/=end
# pairs are properly closed.
sub cmd_end {
    my $self = shift;
    $$self{EXCLUDE} = 0;
    $$self{VERBATIM} = 0;
}

# One paragraph for a particular translator.  Ignore it unless it's intended
# for man or roff, in which case we output it verbatim.
sub cmd_for {
    my $self = shift;
    local $_ = shift;
    return unless s/^(?:man|roff)\b[ \t]*\n?//;
    $self->output ($_);
}


############################################################################
# Link handling
############################################################################

# Handle links.  We can't actually make real hyperlinks, so this is all to
# figure out what text and formatting we print out.
sub buildlink {
    my $self = shift;
    local $_ = shift;

    # Smash whitespace in case we were split across multiple lines.
    s/\s+/ /g;

    # If we were given any explicit text, just output it.
    if (m{ ^ ([^|]+) \| }x) { return $1 }

    # Okay, leading and trailing whitespace isn't important.
    s/^\s+//;
    s/\s+$//;

    # Default to using the whole content of the link entry as a section
    # name.  Note that L<manpage/> forces a manpage interpretation, as does
    # something looking like L<manpage(section)>.  Do the same thing to
    # L<manpage(section)> as we would to manpage(section) without the L<>;
    # see guesswork().  If we've added italics, don't add the "manpage"
    # text; markup is sufficient.
    my ($manpage, $section) = ('', $_);
    if (/^"\s*(.*?)\s*"$/) {
        $section = '"' . $1 . '"';
    } elsif (m{ ^ [-:.\w]+ (?: \( \S+ \) )? $ }x) {
        ($manpage, $section) = ($_, '');
        $manpage =~ s/^([^\(]+)\(/'\f(IS' . $1 . '\f(IE\|('/e;
    } elsif (m%/%) {
        ($manpage, $section) = split (/\s*\/\s*/, $_, 2);
        if ($manpage =~ /^[-:.\w]+(?:\(\S+\))?$/) {
            $manpage =~ s/^([^\(]+)\(/'\f(IS' . $1 . '\f(IE\|'/e;
        }
        $section =~ s/^\"\s*//;
        $section =~ s/\s*\"$//;
    }
    if ($manpage && $manpage !~ /\\f\(IS/) {
        $manpage = "the $manpage manpage";
    }

    # Now build the actual output text.
    my $text = '';
    if (!length ($section) && !length ($manpage)) {
        carp "Invalid link $_";
    } elsif (!length ($section)) {
        $text = $manpage;
    } elsif ($section =~ /^[:\w]+(?:\(\))?/) {
        $text .= 'the ' . $section . ' entry';
        $text .= (length $manpage) ? " in $manpage"
                                   : " elsewhere in this document";
    } else {
        if ($section !~ /^".*"$/) { $section = '"' . $section . '"' }
        $text .= 'the section on ' . $section;
        $text .= " in $manpage" if length $manpage;
    }
    $text;
}


############################################################################
# Escaping and fontification
############################################################################

# At this point, we'll have embedded font codes of the form \f(<font>[SE]
# where <font> is one of B, I, or F.  Turn those into the right font start
# or end codes.  B<someI<thing> else> should map to \fBsome\f(BIthing\fB
# else\fR.  The old pod2man didn't get this right; the second \fB was \fR,
# so nested sequences didn't work right.  We take care of this by using
# variables as a combined pointer to our current font sequence, and set each
# to the number of current nestings of start tags for that font.  Use them
# as a vector to look up what font sequence to use.
sub mapfonts {
    my $self = shift;
    local $_ = shift;

    my ($fixed, $bold, $italic) = (0, 0, 0);
    my %magic = (F => \$fixed, B => \$bold, I => \$italic);
    s { \\f\((.)(.) } {
        ${ $magic{$1} } += ($2 eq 'S') ? 1 : -1;
        $$self{FONTS}{($fixed && 1) . ($bold && 1) . ($italic && 1)};
    }gxe;
    $_;
}


############################################################################
# *roff-specific parsing
############################################################################

# Called instead of parse_text, calls parse_text with the right flags.
sub parse {
    my $self = shift;
    $self->parse_text ({ -expand_seq   => 'sequence',
                         -expand_ptree => 'collapse' }, @_);
}
    
# Takes a parse tree and a flag saying whether or not to treat it as literal
# text (not call guesswork on it), and returns the concatenation of all of
# the text strings in that parse tree.  If the literal flag isn't true,
# guesswork() will be called on all plain scalars in the parse tree.
# Otherwise, just escape backslashes in the normal case.  If collapse is
# being called on a C<> sequence, literal is set to 2, and we do some
# additional cleanup.  Assumes that everything in the parse tree is either a
# scalar or a reference to a scalar.
sub collapse {
    my ($self, $ptree, $literal) = @_;
    if ($literal) {
        return join ('', map {
            if (ref $_) {
                $$_;
            } else {
                s/\\/\\e/g;
                s/-/\\-/g    if $literal > 1;
                s/__/_\\|_/g if $literal > 1;
                $_;
            }
        } $ptree->children);
    } else {
        return join ('', map {
            ref ($_) ? $$_ : $self->guesswork ($_)
        } $ptree->children);
    }
}

# Takes a text block to perform guesswork on; this is guaranteed not to
# contain any interior sequences.  Returns the text block with remapping
# done.
sub guesswork {
    my $self = shift;
    local $_ = shift;

    # rofficate backslashes.
    s/\\/\\e/g;

    # Ensure double underbars have a tiny space between them.
    s/__/_\\|_/g;

    # Make all caps a little smaller.  Be careful here, since we don't want
    # to make @ARGV into small caps, nor do we want to fix the MIME in
    # MIME-Version, since it looks weird with the full-height V.
    s{
        ( ^ | [\s\(\"\'\`\[\{<>] )
        ( [A-Z] [A-Z] [/A-Z+:\d_\$&-]* )
        (?: (?= [\s>\}\]\)\'\".?!,;:] | -- ) | $ )
    } { $1 . '\s-1' . $2 . '\s0' }egx;

    # Turn PI into a pretty pi.
    s{ (?: \\s-1 | \b ) PI (?: \\s0 | \b ) } {\\*\(PI}gx;

    # Italize functions in the form func().
    s{
        \b
        (
            [:\w]+ (?:\\s-1)? \(\)
        )
    } { '\f(IS' . $1 . '\f(IE' }egx;

    # func(n) is a reference to a manual page.  Make it \fIfunc\fR\|(n).
    s{
        \b
        (\w[-:.\w]+ (?:\\s-1)?)
        (
            \( [^\)] \)
        )
    } { '\f(IS' . $1 . '\f(IE\|' . $2 }egx;

    # Convert simple Perl variable references to a fixed-width font.
    s{
        ( \s+ )
        ( [\$\@%] [\w:]+ )
        (?! \( )
    } { $1 . '\f(FS' . $2 . '\f(FE'}egx;

    # Translate -- into a real em dash if it's used like one and fix up
    # dashes, but keep hyphens hyphens.
    s{ (\G|^|.) (-+) (\b|.) } {
        my ($pre, $dash, $post) = ($1, $2, $3);
        if (length ($dash) == 1) {
            ($pre =~ /[a-zA-Z]/) ? "$pre-$post" : "$pre\\-$post";
        } elsif (length ($dash) == 2
                 && ((!$pre && !$post)
                     || ($pre =~ /\w/ && !$post)
                     || ($pre eq ' ' && $post eq ' ')
                     || ($pre eq '=' && $post ne '=')
                     || ($pre ne '=' && $post eq '='))) {
            "$pre\\*(--$post";
        } else {
            $pre . ('\-' x length $dash) . $post;
        }
    }egxs;

    # Fix up double quotes.
    s{ \" ([^\"]+) \" } { '\*(L"' . $1 . '\*(R"' }egx;

    # Make C++ into \*(C+, which is a squinched version.
    s{ \b C\+\+ } {\\*\(C+}gx;

    # All done.
    $_;
}


############################################################################
# Output formatting
############################################################################

# Make vertical whitespace.
sub makespace {
    my $self = shift;
    $self->output ($$self{INDENT} > 0 ? ".Sp\n" : ".PP\n");
}

# Output any pending index entries, and optionally an index entry given as
# an argument.  Support multiple index entries in X<> separated by slashes,
# and strip special escapes from index entries.
sub outindex {
    my ($self, $section, $index) = @_;
    my @entries = map { split m%\s*/\s*% } @{ $$self{INDEX} };
    return unless ($section || @entries);
    $$self{INDEX} = [];
    my $output;
    if (@entries) {
        my $output = '.IX Xref "'
            . join (' ', map { s/\"/\"\"/; $_ } @entries)
            . '"' . "\n";
    }
    if ($section) {
        $index =~ s/\"/\"\"/;
        $index =~ s/\\-/-/g;
        $index =~ s/\\(?:s-?\d|.\(..|.)//g;
        $output .= ".IX $section " . '"' . $index . '"' . "\n";
    }
    $self->output ($output);
}

# Output text to the output device.
sub output { print { $_[0]->output_handle } $_[1] }

__END__

.\" These are some extra bits of roff that I don't want to lose track of
.\" but that have been removed from the preamble to make it a bit shorter
.\" since they're not currently being used.  They're accents and special
.\" characters we don't currently have escapes for.
.if n \{\
.    ds ? ?
.    ds ! !
.    ds q
.\}
.if t \{\
.    ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10'
.    ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m'
.    ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10'
.\}
.ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#]
.ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u'
.ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u'
.ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#]
.ds oe o\h'-(\w'o'u*4/10)'e
.ds Oe O\h'-(\w'O'u*4/10)'E
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds v \h'-1'\o'\(aa\(ga'
.    ds _ \h'-1'^
.    ds . \h'-1'.
.    ds 3 3
.    ds oe oe
.    ds Oe OE
.\}

############################################################################
# Documentation
############################################################################

=head1 NAME

Pod::Man - Convert POD data to formatted *roff input

=head1 SYNOPSIS

    use Pod::Man;
    my $parser = Pod::Man->new (release => $VERSION, section => 8);

    # Read POD from STDIN and write to STDOUT.
    $parser->parse_from_filehandle;

    # Read POD from file.pod and write to file.1.
    $parser->parse_from_file ('file.pod', 'file.1');

=head1 DESCRIPTION

Pod::Man is a module to convert documentation in the POD format (the
preferred language for documenting Perl) into *roff input using the man
macro set.  The resulting *roff code is suitable for display on a terminal
using nroff(1), normally via man(1), or printing using troff(1).  It is
conventionally invoked using the driver script B<pod2man>, but it can also
be used directly.

As a derived class from Pod::Parser, Pod::Man supports the same methods and
interfaces.  See L<Pod::Parser> for all the details; briefly, one creates a
new parser with C<Pod::Man-E<gt>new()> and then calls either
parse_from_filehandle() or parse_from_file().

new() can take options, in the form of key/value pairs that control the
behavior of the parser.  See below for details.

If no options are given, Pod::Man uses the name of the input file with any
trailing C<.pod>, C<.pm>, or C<.pl> stripped as the man page title, to
section 1 unless the file ended in C<.pm> in which case it defaults to
section 3, to a centered title of "User Contributed Perl Documentation", to
a centered footer of the Perl version it is run with, and to a left-hand
footer of the modification date of its input (or the current date if given
STDIN for input).

Pod::Man assumes that your *roff formatters have a fixed-width font named
CW.  If yours is called something else (like CR), use the C<fixed> option to
specify it.  This generally only matters for troff output for printing.
Similarly, you can set the fonts used for bold, italic, and bold italic
fixed-width output.

Besides the obvious pod conversions, Pod::Man also takes care of formatting
func(), func(n), and simple variable references like $foo or @bar so you
don't have to use code escapes for them; complex expressions like
C<$fred{'stuff'}> will still need to be escaped, though.  It also translates
dashes that aren't used as hyphens into en dashes, makes long dashes--like
this--into proper em dashes, fixes "paired quotes," makes C++ and PI look
right, puts a little space between double underbars, makes ALLCAPS a teeny
bit smaller in troff(1), and escapes stuff that *roff treats as special so
that you don't have to.

The recognized options to new() are as follows.  All options take a single
argument.

=over 4

=item center

Sets the centered page header to use instead of "User Contributed Perl
Documentation".

=item date

Sets the left-hand footer.  By default, the modification date of the input
file will be used, or the current date if stat() can't find that file (the
case if the input is from STDIN), and the date will be formatted as
YYYY-MM-DD.

=item fixed

The fixed-width font to use for vertabim text and code.  Defaults to CW.
Some systems may want CR instead.  Only matters for troff(1) output.

=item fixedbold

Bold version of the fixed-width font.  Defaults to CB.  Only matters for
troff(1) output.

=item fixeditalic

Italic version of the fixed-width font (actually, something of a misnomer,
since most fixed-width fonts only have an oblique version, not an italic
version).  Defaults to CI.  Only matters for troff(1) output.

=item fixedbolditalic

Bold italic (probably actually oblique) version of the fixed-width font.
Pod::Man doesn't assume you have this, and defaults to CB.  Some systems
(such as Solaris) have this font available as CX.  Only matters for troff(1)
output.

=item release

Set the centered footer.  By default, this is the version of Perl you run
Pod::Man under.  Note that some system an macro sets assume that the
centered footer will be a modification date and will prepend something like
"Last modified: "; if this is the case, you may want to set C<release> to
the last modified date and C<date> to the version number.

=item section

Set the section for the C<.TH> macro.  The standard section numbering
convention is to use 1 for user commands, 2 for system calls, 3 for
functions, 4 for devices, 5 for file formats, 6 for games, 7 for
miscellaneous information, and 8 for administrator commands.  There is a lot
of variation here, however; some systems (like Solaris) use 4 for file
formats, 5 for miscellaneous information, and 7 for devices.  Still others
use 1m instead of 8, or some mix of both.  About the only section numbers
that are reliably consistent are 1, 2, and 3.

By default, section 1 will be used unless the file ends in .pm in which case
section 3 will be selected.

=back

The standard Pod::Parser method parse_from_filehandle() takes up to two
arguments, the first being the file handle to read POD from and the second
being the file handle to write the formatted output to.  The first defaults
to STDIN if not given, and the second defaults to STDOUT.  The method
parse_from_file() is almost identical, except that its two arguments are the
input and output disk files instead.  See L<Pod::Parser> for the specific
details.

=head1 DIAGNOSTICS

=over 4

=item roff font should be 1 or 2 chars, not `%s'

(F) You specified a *roff font (using C<fixed>, C<fixedbold>, etc.) that
wasn't either one or two characters.  Pod::Man doesn't support *roff fonts
longer than two characters, although some *roff extensions do (the canonical
versions of nroff(1) and troff(1) don't either).

=item Invalid link %s

(W) The POD source contained a C<LE<lt>E<gt>> sequence that Pod::Man was
unable to parse.  You should never see this error message; it probably
indicates a bug in Pod::Man.

=item Unknown escape EE<lt>%sE<gt>

(W) The POD source contained an C<EE<lt>E<gt>> escape that Pod::Man didn't
know about.  C<EE<lt>%sE<gt>> was printed verbatim in the output.

=item Unknown sequence %s

(W) The POD source contained a non-standard interior sequence (something of
the form C<XE<lt>E<gt>>) that Pod::Man didn't know about.  It was ignored.

=item Unmatched =back

(W) Pod::Man encountered a C<=back> command that didn't correspond to an
C<=over> command.

=back

=head1 BUGS

The lint-like features and strict POD format checking done by B<pod2man> are
not yet implemented and should be, along with the corresponding C<lax>
option.

The NAME section should be recognized specially and index entries emitted
for everything in that section.  This would have to be deferred until the
next section, since extraneous things in NAME tends to confuse various man
page processors.

The handling of hyphens, en dashes, and em dashes is somewhat fragile, and
one may get the wrong one under some circumstances.  This should only matter
for troff(1) output.

When and whether to use small caps is somewhat tricky, and Pod::Man doesn't
necessarily get it right.

Pod::Man doesn't handle font names longer than two characters.  Neither do
most troff(1) implementations, but GNU troff does as an extension.  It would
be nice to support as an option for those who want to use it.

The preamble added to each output file is rather verbose, and most of it is
only necessary in the presence of EE<lt>E<gt> escapes for non-ASCII
characters.  It would ideally be nice if all of those definitions were only
output if needed, perhaps on the fly as the characters are used.

Some of the automagic applied to file names assumes Unix directory
separators.

Pod::Man is excessively slow.

=head1 SEE ALSO

L<Pod::Parser|Pod::Parser>, perlpod(1), pod2man(1), nroff(1), troff(1),
man(1), man(7)

Ossanna, Joseph F., and Brian W. Kernighan.  "Troff User's Manual,"
Computing Science Technical Report No. 54, AT&T Bell Laboratories.  This is
the best documentation of standard nroff(1) and troff(1).  At the time of
this writing, it's available at http://www.cs.bell-labs.com/cm/cs/cstr.html.

The man page documenting the man macro set may be man(5) instead of man(7)
on your system.  Also, please see pod2man(1) for extensive documentation on
writing manual pages if you've not done it before and aren't familiar with
the conventions.

=head1 AUTHOR

Russ Allbery E<lt>rra@stanford.eduE<gt>, based I<very> heavily on the
original B<pod2man> by Tom Christiansen E<lt>tchrist@mox.perl.comE<gt>.

=cut