Commit | Line | Data |
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599cee73 PM |
1 | #!/usr/bin/perl |
2 | ||
98225a64 | 3 | $VERSION = '1.02_02'; |
b75c8c73 | 4 | |
73f0cc2d GS |
5 | BEGIN { |
6 | push @INC, './lib'; | |
7 | } | |
599cee73 PM |
8 | use strict ; |
9 | ||
10 | sub DEFAULT_ON () { 1 } | |
11 | sub DEFAULT_OFF () { 2 } | |
12 | ||
13 | my $tree = { | |
d3a7d8c7 | 14 | |
0d658bf5 PM |
15 | 'all' => [ 5.008, { |
16 | 'io' => [ 5.008, { | |
17 | 'pipe' => [ 5.008, DEFAULT_OFF], | |
18 | 'unopened' => [ 5.008, DEFAULT_OFF], | |
19 | 'closed' => [ 5.008, DEFAULT_OFF], | |
20 | 'newline' => [ 5.008, DEFAULT_OFF], | |
21 | 'exec' => [ 5.008, DEFAULT_OFF], | |
22 | 'layer' => [ 5.008, DEFAULT_OFF], | |
23 | }], | |
24 | 'syntax' => [ 5.008, { | |
25 | 'ambiguous' => [ 5.008, DEFAULT_OFF], | |
26 | 'semicolon' => [ 5.008, DEFAULT_OFF], | |
27 | 'precedence' => [ 5.008, DEFAULT_OFF], | |
28 | 'bareword' => [ 5.008, DEFAULT_OFF], | |
29 | 'reserved' => [ 5.008, DEFAULT_OFF], | |
30 | 'digit' => [ 5.008, DEFAULT_OFF], | |
31 | 'parenthesis' => [ 5.008, DEFAULT_OFF], | |
32 | 'printf' => [ 5.008, DEFAULT_OFF], | |
33 | 'prototype' => [ 5.008, DEFAULT_OFF], | |
34 | 'qw' => [ 5.008, DEFAULT_OFF], | |
35 | }], | |
36 | 'severe' => [ 5.008, { | |
37 | 'inplace' => [ 5.008, DEFAULT_ON], | |
38 | 'internal' => [ 5.008, DEFAULT_ON], | |
39 | 'debugging' => [ 5.008, DEFAULT_ON], | |
40 | 'malloc' => [ 5.008, DEFAULT_ON], | |
41 | }], | |
42 | 'deprecated' => [ 5.008, DEFAULT_OFF], | |
43 | 'void' => [ 5.008, DEFAULT_OFF], | |
44 | 'recursion' => [ 5.008, DEFAULT_OFF], | |
45 | 'redefine' => [ 5.008, DEFAULT_OFF], | |
46 | 'numeric' => [ 5.008, DEFAULT_OFF], | |
47 | 'uninitialized' => [ 5.008, DEFAULT_OFF], | |
48 | 'once' => [ 5.008, DEFAULT_OFF], | |
49 | 'misc' => [ 5.008, DEFAULT_OFF], | |
50 | 'regexp' => [ 5.008, DEFAULT_OFF], | |
51 | 'glob' => [ 5.008, DEFAULT_OFF], | |
0d658bf5 PM |
52 | 'untie' => [ 5.008, DEFAULT_OFF], |
53 | 'substr' => [ 5.008, DEFAULT_OFF], | |
54 | 'taint' => [ 5.008, DEFAULT_OFF], | |
55 | 'signal' => [ 5.008, DEFAULT_OFF], | |
56 | 'closure' => [ 5.008, DEFAULT_OFF], | |
57 | 'overflow' => [ 5.008, DEFAULT_OFF], | |
58 | 'portable' => [ 5.008, DEFAULT_OFF], | |
59 | 'utf8' => [ 5.008, DEFAULT_OFF], | |
60 | 'exiting' => [ 5.008, DEFAULT_OFF], | |
61 | 'pack' => [ 5.008, DEFAULT_OFF], | |
62 | 'unpack' => [ 5.008, DEFAULT_OFF], | |
38875929 | 63 | 'threads' => [ 5.008, DEFAULT_OFF], |
8fa7688f | 64 | |
0d658bf5 PM |
65 | #'default' => [ 5.008, DEFAULT_ON ], |
66 | }], | |
d3a7d8c7 | 67 | } ; |
599cee73 | 68 | |
599cee73 PM |
69 | ########################################################################### |
70 | sub tab { | |
71 | my($l, $t) = @_; | |
72 | $t .= "\t" x ($l - (length($t) + 1) / 8); | |
73 | $t; | |
74 | } | |
75 | ||
76 | ########################################################################### | |
77 | ||
78 | my %list ; | |
79 | my %Value ; | |
0d658bf5 PM |
80 | my %ValueToName ; |
81 | my %NameToValue ; | |
d3a7d8c7 | 82 | my $index ; |
599cee73 | 83 | |
0d658bf5 PM |
84 | my %v_list = () ; |
85 | ||
86 | sub valueWalk | |
87 | { | |
88 | my $tre = shift ; | |
89 | my @list = () ; | |
90 | my ($k, $v) ; | |
91 | ||
92 | foreach $k (sort keys %$tre) { | |
93 | $v = $tre->{$k}; | |
94 | die "duplicate key $k\n" if defined $list{$k} ; | |
95 | die "Value associated with key '$k' is not an ARRAY reference" | |
96 | if !ref $v || ref $v ne 'ARRAY' ; | |
97 | ||
98 | my ($ver, $rest) = @{ $v } ; | |
99 | push @{ $v_list{$ver} }, $k; | |
100 | ||
101 | if (ref $rest) | |
102 | { valueWalk ($rest) } | |
103 | ||
104 | } | |
105 | ||
106 | } | |
107 | ||
108 | sub orderValues | |
109 | { | |
110 | my $index = 0; | |
111 | foreach my $ver ( sort { $a <=> $b } keys %v_list ) { | |
112 | foreach my $name (@{ $v_list{$ver} } ) { | |
113 | $ValueToName{ $index } = [ uc $name, $ver ] ; | |
114 | $NameToValue{ uc $name } = $index ++ ; | |
115 | } | |
116 | } | |
117 | ||
118 | return $index ; | |
119 | } | |
120 | ||
121 | ########################################################################### | |
122 | ||
599cee73 PM |
123 | sub walk |
124 | { | |
125 | my $tre = shift ; | |
126 | my @list = () ; | |
127 | my ($k, $v) ; | |
128 | ||
95dfd3ab GS |
129 | foreach $k (sort keys %$tre) { |
130 | $v = $tre->{$k}; | |
599cee73 | 131 | die "duplicate key $k\n" if defined $list{$k} ; |
0d658bf5 PM |
132 | #$Value{$index} = uc $k ; |
133 | die "Can't find key '$k'" | |
134 | if ! defined $NameToValue{uc $k} ; | |
135 | push @{ $list{$k} }, $NameToValue{uc $k} ; | |
136 | die "Value associated with key '$k' is not an ARRAY reference" | |
137 | if !ref $v || ref $v ne 'ARRAY' ; | |
138 | ||
139 | my ($ver, $rest) = @{ $v } ; | |
140 | if (ref $rest) | |
141 | { push (@{ $list{$k} }, walk ($rest)) } | |
142 | ||
599cee73 PM |
143 | push @list, @{ $list{$k} } ; |
144 | } | |
145 | ||
146 | return @list ; | |
599cee73 PM |
147 | } |
148 | ||
149 | ########################################################################### | |
150 | ||
151 | sub mkRange | |
152 | { | |
153 | my @a = @_ ; | |
154 | my @out = @a ; | |
155 | my $i ; | |
156 | ||
157 | ||
158 | for ($i = 1 ; $i < @a; ++ $i) { | |
0ca4541c | 159 | $out[$i] = ".." |
599cee73 PM |
160 | if $a[$i] == $a[$i - 1] + 1 && $a[$i] + 1 == $a[$i + 1] ; |
161 | } | |
162 | ||
163 | my $out = join(",",@out); | |
164 | ||
165 | $out =~ s/,(\.\.,)+/../g ; | |
166 | return $out; | |
167 | } | |
168 | ||
169 | ########################################################################### | |
e476b1b5 GS |
170 | sub printTree |
171 | { | |
172 | my $tre = shift ; | |
173 | my $prefix = shift ; | |
e476b1b5 GS |
174 | my ($k, $v) ; |
175 | ||
176 | my $max = (sort {$a <=> $b} map { length $_ } keys %$tre)[-1] ; | |
0d658bf5 | 177 | my @keys = sort keys %$tre ; |
e476b1b5 | 178 | |
0d658bf5 | 179 | while ($k = shift @keys) { |
e476b1b5 | 180 | $v = $tre->{$k}; |
0d658bf5 PM |
181 | die "Value associated with key '$k' is not an ARRAY reference" |
182 | if !ref $v || ref $v ne 'ARRAY' ; | |
183 | ||
184 | my $offset ; | |
185 | if ($tre ne $tree) { | |
186 | print $prefix . "|\n" ; | |
187 | print $prefix . "+- $k" ; | |
188 | $offset = ' ' x ($max + 4) ; | |
189 | } | |
190 | else { | |
191 | print $prefix . "$k" ; | |
192 | $offset = ' ' x ($max + 1) ; | |
193 | } | |
194 | ||
195 | my ($ver, $rest) = @{ $v } ; | |
196 | if (ref $rest) | |
0ca4541c | 197 | { |
0d658bf5 PM |
198 | my $bar = @keys ? "|" : " "; |
199 | print " -" . "-" x ($max - length $k ) . "+\n" ; | |
200 | printTree ($rest, $prefix . $bar . $offset ) | |
e476b1b5 GS |
201 | } |
202 | else | |
203 | { print "\n" } | |
204 | } | |
205 | ||
206 | } | |
207 | ||
208 | ########################################################################### | |
599cee73 | 209 | |
317ea90d | 210 | sub mkHexOct |
599cee73 | 211 | { |
317ea90d | 212 | my ($f, $max, @a) = @_ ; |
599cee73 PM |
213 | my $mask = "\x00" x $max ; |
214 | my $string = "" ; | |
215 | ||
216 | foreach (@a) { | |
217 | vec($mask, $_, 1) = 1 ; | |
218 | } | |
219 | ||
599cee73 | 220 | foreach (unpack("C*", $mask)) { |
317ea90d MS |
221 | if ($f eq 'x') { |
222 | $string .= '\x' . sprintf("%2.2x", $_) | |
223 | } | |
224 | else { | |
225 | $string .= '\\' . sprintf("%o", $_) | |
226 | } | |
599cee73 PM |
227 | } |
228 | return $string ; | |
229 | } | |
230 | ||
317ea90d MS |
231 | sub mkHex |
232 | { | |
233 | my($max, @a) = @_; | |
234 | return mkHexOct("x", $max, @a); | |
235 | } | |
236 | ||
237 | sub mkOct | |
238 | { | |
239 | my($max, @a) = @_; | |
240 | return mkHexOct("o", $max, @a); | |
241 | } | |
242 | ||
599cee73 PM |
243 | ########################################################################### |
244 | ||
e476b1b5 GS |
245 | if (@ARGV && $ARGV[0] eq "tree") |
246 | { | |
0d658bf5 | 247 | printTree($tree, " ") ; |
e476b1b5 GS |
248 | exit ; |
249 | } | |
599cee73 | 250 | |
918426be NC |
251 | unlink "warnings.h"; |
252 | unlink "lib/warnings.pm"; | |
4438c4b7 | 253 | open(WARN, ">warnings.h") || die "Can't create warnings.h: $!\n"; |
dfb1454f | 254 | binmode WARN; |
4438c4b7 | 255 | open(PM, ">lib/warnings.pm") || die "Can't create lib/warnings.pm: $!\n"; |
dfb1454f | 256 | binmode PM; |
599cee73 PM |
257 | |
258 | print WARN <<'EOM' ; | |
37442d52 RGS |
259 | /* -*- buffer-read-only: t -*- |
260 | !!!!!!! DO NOT EDIT THIS FILE !!!!!!! | |
4438c4b7 | 261 | This file is built by warnings.pl |
599cee73 PM |
262 | Any changes made here will be lost! |
263 | */ | |
264 | ||
265 | ||
0453d815 PM |
266 | #define Off(x) ((x) / 8) |
267 | #define Bit(x) (1 << ((x) % 8)) | |
599cee73 PM |
268 | #define IsSet(a, x) ((a)[Off(x)] & Bit(x)) |
269 | ||
0453d815 | 270 | |
599cee73 | 271 | #define G_WARN_OFF 0 /* $^W == 0 */ |
0453d815 | 272 | #define G_WARN_ON 1 /* -w flag and $^W != 0 */ |
599cee73 PM |
273 | #define G_WARN_ALL_ON 2 /* -W flag */ |
274 | #define G_WARN_ALL_OFF 4 /* -X flag */ | |
0453d815 | 275 | #define G_WARN_ONCE 8 /* set if 'once' ever enabled */ |
599cee73 PM |
276 | #define G_WARN_ALL_MASK (G_WARN_ALL_ON|G_WARN_ALL_OFF) |
277 | ||
a0714e2c | 278 | #define pWARN_STD NULL |
72dc9ed5 NC |
279 | #define pWARN_ALL (((STRLEN*)0)+1) /* use warnings 'all' */ |
280 | #define pWARN_NONE (((STRLEN*)0)+2) /* no warnings 'all' */ | |
599cee73 | 281 | |
d3a7d8c7 GS |
282 | #define specialWARN(x) ((x) == pWARN_STD || (x) == pWARN_ALL || \ |
283 | (x) == pWARN_NONE) | |
5f2d9966 DM |
284 | |
285 | /* if PL_warnhook is set to this value, then warnings die */ | |
06dcd5bf | 286 | #define PERL_WARNHOOK_FATAL (&PL_sv_placeholder) |
599cee73 PM |
287 | EOM |
288 | ||
d3a7d8c7 GS |
289 | my $offset = 0 ; |
290 | ||
291 | $index = $offset ; | |
292 | #@{ $list{"all"} } = walk ($tree) ; | |
0d658bf5 PM |
293 | valueWalk ($tree) ; |
294 | my $index = orderValues(); | |
599cee73 | 295 | |
12bcd1a6 PM |
296 | die <<EOM if $index > 255 ; |
297 | Too many warnings categories -- max is 255 | |
298 | rewrite packWARN* & unpackWARN* macros | |
299 | EOM | |
599cee73 | 300 | |
0d658bf5 PM |
301 | walk ($tree) ; |
302 | ||
599cee73 PM |
303 | $index *= 2 ; |
304 | my $warn_size = int($index / 8) + ($index % 8 != 0) ; | |
305 | ||
306 | my $k ; | |
0d658bf5 PM |
307 | my $last_ver = 0; |
308 | foreach $k (sort { $a <=> $b } keys %ValueToName) { | |
309 | my ($name, $version) = @{ $ValueToName{$k} }; | |
310 | print WARN "\n/* Warnings Categories added in Perl $version */\n\n" | |
311 | if $last_ver != $version ; | |
312 | print WARN tab(5, "#define WARN_$name"), "$k\n" ; | |
313 | $last_ver = $version ; | |
599cee73 PM |
314 | } |
315 | print WARN "\n" ; | |
316 | ||
317 | print WARN tab(5, '#define WARNsize'), "$warn_size\n" ; | |
318 | #print WARN tab(5, '#define WARN_ALLstring'), '"', ('\377' x $warn_size) , "\"\n" ; | |
319 | print WARN tab(5, '#define WARN_ALLstring'), '"', ('\125' x $warn_size) , "\"\n" ; | |
320 | print WARN tab(5, '#define WARN_NONEstring'), '"', ('\0' x $warn_size) , "\"\n" ; | |
321 | ||
322 | print WARN <<'EOM'; | |
323 | ||
d5a71f30 GS |
324 | #define isLEXWARN_on (PL_curcop->cop_warnings != pWARN_STD) |
325 | #define isLEXWARN_off (PL_curcop->cop_warnings == pWARN_STD) | |
326 | #define isWARN_ONCE (PL_dowarn & (G_WARN_ON|G_WARN_ONCE)) | |
72dc9ed5 NC |
327 | #define isWARN_on(c,x) (IsSet((U8 *)(c + 1), 2*(x))) |
328 | #define isWARNf_on(c,x) (IsSet((U8 *)(c + 1), 2*(x)+1)) | |
329 | ||
330 | #define DUP_WARNINGS(p) \ | |
594cd643 NC |
331 | (specialWARN(p) ? (STRLEN*)(p) \ |
332 | : (STRLEN*)CopyD(p, PerlMemShared_malloc(sizeof(*p)+*p), sizeof(*p)+*p, \ | |
333 | char)) | |
d5a71f30 | 334 | |
f54ba1c2 DM |
335 | #define ckWARN(w) Perl_ckwarn(aTHX_ packWARN(w)) |
336 | #define ckWARN2(w1,w2) Perl_ckwarn(aTHX_ packWARN2(w1,w2)) | |
337 | #define ckWARN3(w1,w2,w3) Perl_ckwarn(aTHX_ packWARN3(w1,w2,w3)) | |
338 | #define ckWARN4(w1,w2,w3,w4) Perl_ckwarn(aTHX_ packWARN4(w1,w2,w3,w4)) | |
339 | ||
340 | #define ckWARN_d(w) Perl_ckwarn_d(aTHX_ packWARN(w)) | |
341 | #define ckWARN2_d(w1,w2) Perl_ckwarn_d(aTHX_ packWARN2(w1,w2)) | |
342 | #define ckWARN3_d(w1,w2,w3) Perl_ckwarn_d(aTHX_ packWARN3(w1,w2,w3)) | |
343 | #define ckWARN4_d(w1,w2,w3,w4) Perl_ckwarn_d(aTHX_ packWARN4(w1,w2,w3,w4)) | |
12bcd1a6 | 344 | |
3b9e3074 SH |
345 | #define packWARN(a) (a ) |
346 | #define packWARN2(a,b) ((a) | ((b)<<8) ) | |
347 | #define packWARN3(a,b,c) ((a) | ((b)<<8) | ((c)<<16) ) | |
348 | #define packWARN4(a,b,c,d) ((a) | ((b)<<8) | ((c)<<16) | ((d) <<24)) | |
12bcd1a6 PM |
349 | |
350 | #define unpackWARN1(x) ((x) & 0xFF) | |
351 | #define unpackWARN2(x) (((x) >>8) & 0xFF) | |
352 | #define unpackWARN3(x) (((x) >>16) & 0xFF) | |
353 | #define unpackWARN4(x) (((x) >>24) & 0xFF) | |
354 | ||
355 | #define ckDEAD(x) \ | |
356 | ( ! specialWARN(PL_curcop->cop_warnings) && \ | |
357 | ( isWARNf_on(PL_curcop->cop_warnings, WARN_ALL) || \ | |
358 | isWARNf_on(PL_curcop->cop_warnings, unpackWARN1(x)) || \ | |
359 | isWARNf_on(PL_curcop->cop_warnings, unpackWARN2(x)) || \ | |
360 | isWARNf_on(PL_curcop->cop_warnings, unpackWARN3(x)) || \ | |
361 | isWARNf_on(PL_curcop->cop_warnings, unpackWARN4(x)))) | |
362 | ||
4438c4b7 | 363 | /* end of file warnings.h */ |
37442d52 | 364 | /* ex: set ro: */ |
599cee73 PM |
365 | EOM |
366 | ||
367 | close WARN ; | |
368 | ||
369 | while (<DATA>) { | |
370 | last if /^KEYWORDS$/ ; | |
371 | print PM $_ ; | |
372 | } | |
373 | ||
d3a7d8c7 GS |
374 | #$list{'all'} = [ $offset .. 8 * ($warn_size/2) - 1 ] ; |
375 | ||
0d658bf5 | 376 | $last_ver = 0; |
53c33732 | 377 | print PM "our %Offsets = (\n" ; |
0d658bf5 PM |
378 | foreach my $k (sort { $a <=> $b } keys %ValueToName) { |
379 | my ($name, $version) = @{ $ValueToName{$k} }; | |
380 | $name = lc $name; | |
d3a7d8c7 | 381 | $k *= 2 ; |
0d658bf5 PM |
382 | if ( $last_ver != $version ) { |
383 | print PM "\n"; | |
384 | print PM tab(4, " # Warnings Categories added in Perl $version"); | |
385 | print PM "\n\n"; | |
386 | } | |
387 | print PM tab(4, " '$name'"), "=> $k,\n" ; | |
388 | $last_ver = $version; | |
d3a7d8c7 GS |
389 | } |
390 | ||
391 | print PM " );\n\n" ; | |
392 | ||
53c33732 | 393 | print PM "our %Bits = (\n" ; |
599cee73 PM |
394 | foreach $k (sort keys %list) { |
395 | ||
396 | my $v = $list{$k} ; | |
397 | my @list = sort { $a <=> $b } @$v ; | |
398 | ||
0ca4541c NIS |
399 | print PM tab(4, " '$k'"), '=> "', |
400 | # mkHex($warn_size, @list), | |
401 | mkHex($warn_size, map $_ * 2 , @list), | |
599cee73 PM |
402 | '", # [', mkRange(@list), "]\n" ; |
403 | } | |
404 | ||
405 | print PM " );\n\n" ; | |
406 | ||
53c33732 | 407 | print PM "our %DeadBits = (\n" ; |
599cee73 PM |
408 | foreach $k (sort keys %list) { |
409 | ||
410 | my $v = $list{$k} ; | |
411 | my @list = sort { $a <=> $b } @$v ; | |
412 | ||
0ca4541c NIS |
413 | print PM tab(4, " '$k'"), '=> "', |
414 | # mkHex($warn_size, @list), | |
415 | mkHex($warn_size, map $_ * 2 + 1 , @list), | |
599cee73 PM |
416 | '", # [', mkRange(@list), "]\n" ; |
417 | } | |
418 | ||
419 | print PM " );\n\n" ; | |
d3a7d8c7 GS |
420 | print PM '$NONE = "', ('\0' x $warn_size) , "\";\n" ; |
421 | print PM '$LAST_BIT = ' . "$index ;\n" ; | |
422 | print PM '$BYTES = ' . "$warn_size ;\n" ; | |
599cee73 PM |
423 | while (<DATA>) { |
424 | print PM $_ ; | |
425 | } | |
426 | ||
37442d52 | 427 | print PM "# ex: set ro:\n"; |
599cee73 PM |
428 | close PM ; |
429 | ||
430 | __END__ | |
37442d52 | 431 | # -*- buffer-read-only: t -*- |
38875929 | 432 | # !!!!!!! DO NOT EDIT THIS FILE !!!!!!! |
4438c4b7 | 433 | # This file was created by warnings.pl |
599cee73 PM |
434 | # Any changes made here will be lost. |
435 | # | |
436 | ||
4438c4b7 | 437 | package warnings; |
599cee73 | 438 | |
f2c3e829 RGS |
439 | our $VERSION = '1.06'; |
440 | ||
441 | # Verify that we're called correctly so that warnings will work. | |
442 | # see also strict.pm. | |
443 | unless ( __FILE__ =~ /(^|[\/\\])\Q@{[__PACKAGE__]}\E\.pm$/ ) { | |
444 | my (undef, $f, $l) = caller; | |
445 | die("Incorrect use of pragma '@{[__PACKAGE__,]}' at $f line $l.\n"); | |
446 | } | |
b75c8c73 | 447 | |
599cee73 PM |
448 | =head1 NAME |
449 | ||
4438c4b7 | 450 | warnings - Perl pragma to control optional warnings |
599cee73 PM |
451 | |
452 | =head1 SYNOPSIS | |
453 | ||
4438c4b7 JH |
454 | use warnings; |
455 | no warnings; | |
599cee73 | 456 | |
4438c4b7 JH |
457 | use warnings "all"; |
458 | no warnings "all"; | |
599cee73 | 459 | |
d3a7d8c7 GS |
460 | use warnings::register; |
461 | if (warnings::enabled()) { | |
462 | warnings::warn("some warning"); | |
463 | } | |
464 | ||
465 | if (warnings::enabled("void")) { | |
e476b1b5 GS |
466 | warnings::warn("void", "some warning"); |
467 | } | |
468 | ||
7e6d00f8 PM |
469 | if (warnings::enabled($object)) { |
470 | warnings::warn($object, "some warning"); | |
471 | } | |
472 | ||
721f911b PM |
473 | warnings::warnif("some warning"); |
474 | warnings::warnif("void", "some warning"); | |
475 | warnings::warnif($object, "some warning"); | |
7e6d00f8 | 476 | |
599cee73 PM |
477 | =head1 DESCRIPTION |
478 | ||
fe2e802c EM |
479 | The C<warnings> pragma is a replacement for the command line flag C<-w>, |
480 | but the pragma is limited to the enclosing block, while the flag is global. | |
481 | See L<perllexwarn> for more information. | |
482 | ||
0453d815 PM |
483 | If no import list is supplied, all possible warnings are either enabled |
484 | or disabled. | |
599cee73 | 485 | |
0ca4541c | 486 | A number of functions are provided to assist module authors. |
e476b1b5 GS |
487 | |
488 | =over 4 | |
489 | ||
d3a7d8c7 GS |
490 | =item use warnings::register |
491 | ||
7e6d00f8 PM |
492 | Creates a new warnings category with the same name as the package where |
493 | the call to the pragma is used. | |
494 | ||
495 | =item warnings::enabled() | |
496 | ||
497 | Use the warnings category with the same name as the current package. | |
498 | ||
499 | Return TRUE if that warnings category is enabled in the calling module. | |
500 | Otherwise returns FALSE. | |
501 | ||
502 | =item warnings::enabled($category) | |
503 | ||
504 | Return TRUE if the warnings category, C<$category>, is enabled in the | |
505 | calling module. | |
506 | Otherwise returns FALSE. | |
507 | ||
508 | =item warnings::enabled($object) | |
509 | ||
510 | Use the name of the class for the object reference, C<$object>, as the | |
511 | warnings category. | |
512 | ||
513 | Return TRUE if that warnings category is enabled in the first scope | |
514 | where the object is used. | |
515 | Otherwise returns FALSE. | |
516 | ||
517 | =item warnings::warn($message) | |
518 | ||
519 | Print C<$message> to STDERR. | |
520 | ||
521 | Use the warnings category with the same name as the current package. | |
522 | ||
523 | If that warnings category has been set to "FATAL" in the calling module | |
524 | then die. Otherwise return. | |
525 | ||
526 | =item warnings::warn($category, $message) | |
527 | ||
528 | Print C<$message> to STDERR. | |
529 | ||
530 | If the warnings category, C<$category>, has been set to "FATAL" in the | |
531 | calling module then die. Otherwise return. | |
d3a7d8c7 | 532 | |
7e6d00f8 | 533 | =item warnings::warn($object, $message) |
e476b1b5 | 534 | |
7e6d00f8 | 535 | Print C<$message> to STDERR. |
e476b1b5 | 536 | |
7e6d00f8 PM |
537 | Use the name of the class for the object reference, C<$object>, as the |
538 | warnings category. | |
e476b1b5 | 539 | |
7e6d00f8 PM |
540 | If that warnings category has been set to "FATAL" in the scope where C<$object> |
541 | is first used then die. Otherwise return. | |
599cee73 | 542 | |
e476b1b5 | 543 | |
7e6d00f8 PM |
544 | =item warnings::warnif($message) |
545 | ||
546 | Equivalent to: | |
547 | ||
548 | if (warnings::enabled()) | |
549 | { warnings::warn($message) } | |
550 | ||
551 | =item warnings::warnif($category, $message) | |
552 | ||
553 | Equivalent to: | |
554 | ||
555 | if (warnings::enabled($category)) | |
556 | { warnings::warn($category, $message) } | |
557 | ||
558 | =item warnings::warnif($object, $message) | |
559 | ||
560 | Equivalent to: | |
561 | ||
562 | if (warnings::enabled($object)) | |
563 | { warnings::warn($object, $message) } | |
d3a7d8c7 | 564 | |
e476b1b5 GS |
565 | =back |
566 | ||
749f83fa | 567 | See L<perlmodlib/Pragmatic Modules> and L<perllexwarn>. |
599cee73 PM |
568 | |
569 | =cut | |
570 | ||
599cee73 PM |
571 | KEYWORDS |
572 | ||
d3a7d8c7 GS |
573 | $All = "" ; vec($All, $Offsets{'all'}, 2) = 3 ; |
574 | ||
c3186b65 PM |
575 | sub Croaker |
576 | { | |
29ddba3b | 577 | require Carp::Heavy; # this initializes %CarpInternal |
dbab294c | 578 | local $Carp::CarpInternal{'warnings'}; |
c3186b65 | 579 | delete $Carp::CarpInternal{'warnings'}; |
8becbb3b | 580 | Carp::croak(@_); |
c3186b65 PM |
581 | } |
582 | ||
6e9af7e4 PM |
583 | sub bits |
584 | { | |
585 | # called from B::Deparse.pm | |
586 | ||
587 | push @_, 'all' unless @_; | |
588 | ||
589 | my $mask; | |
599cee73 PM |
590 | my $catmask ; |
591 | my $fatal = 0 ; | |
6e9af7e4 PM |
592 | my $no_fatal = 0 ; |
593 | ||
594 | foreach my $word ( @_ ) { | |
595 | if ($word eq 'FATAL') { | |
327afb7f | 596 | $fatal = 1; |
6e9af7e4 PM |
597 | $no_fatal = 0; |
598 | } | |
599 | elsif ($word eq 'NONFATAL') { | |
600 | $fatal = 0; | |
601 | $no_fatal = 1; | |
327afb7f | 602 | } |
d3a7d8c7 GS |
603 | elsif ($catmask = $Bits{$word}) { |
604 | $mask |= $catmask ; | |
605 | $mask |= $DeadBits{$word} if $fatal ; | |
6e9af7e4 | 606 | $mask &= ~($DeadBits{$word}|$All) if $no_fatal ; |
599cee73 | 607 | } |
d3a7d8c7 | 608 | else |
c3186b65 | 609 | { Croaker("Unknown warnings category '$word'")} |
599cee73 PM |
610 | } |
611 | ||
612 | return $mask ; | |
613 | } | |
614 | ||
6e9af7e4 PM |
615 | sub import |
616 | { | |
599cee73 | 617 | shift; |
6e9af7e4 PM |
618 | |
619 | my $catmask ; | |
620 | my $fatal = 0 ; | |
621 | my $no_fatal = 0 ; | |
622 | ||
f1f33818 | 623 | my $mask = ${^WARNING_BITS} ; |
6e9af7e4 | 624 | |
f1f33818 PM |
625 | if (vec($mask, $Offsets{'all'}, 1)) { |
626 | $mask |= $Bits{'all'} ; | |
627 | $mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1); | |
628 | } | |
6e9af7e4 PM |
629 | |
630 | push @_, 'all' unless @_; | |
631 | ||
632 | foreach my $word ( @_ ) { | |
633 | if ($word eq 'FATAL') { | |
634 | $fatal = 1; | |
635 | $no_fatal = 0; | |
636 | } | |
637 | elsif ($word eq 'NONFATAL') { | |
638 | $fatal = 0; | |
639 | $no_fatal = 1; | |
640 | } | |
641 | elsif ($catmask = $Bits{$word}) { | |
642 | $mask |= $catmask ; | |
643 | $mask |= $DeadBits{$word} if $fatal ; | |
644 | $mask &= ~($DeadBits{$word}|$All) if $no_fatal ; | |
645 | } | |
646 | else | |
647 | { Croaker("Unknown warnings category '$word'")} | |
648 | } | |
649 | ||
650 | ${^WARNING_BITS} = $mask ; | |
599cee73 PM |
651 | } |
652 | ||
6e9af7e4 PM |
653 | sub unimport |
654 | { | |
599cee73 | 655 | shift; |
6e9af7e4 PM |
656 | |
657 | my $catmask ; | |
d3a7d8c7 | 658 | my $mask = ${^WARNING_BITS} ; |
6e9af7e4 | 659 | |
d3a7d8c7 | 660 | if (vec($mask, $Offsets{'all'}, 1)) { |
f1f33818 | 661 | $mask |= $Bits{'all'} ; |
d3a7d8c7 GS |
662 | $mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1); |
663 | } | |
6e9af7e4 PM |
664 | |
665 | push @_, 'all' unless @_; | |
666 | ||
667 | foreach my $word ( @_ ) { | |
668 | if ($word eq 'FATAL') { | |
669 | next; | |
670 | } | |
671 | elsif ($catmask = $Bits{$word}) { | |
672 | $mask &= ~($catmask | $DeadBits{$word} | $All); | |
673 | } | |
674 | else | |
675 | { Croaker("Unknown warnings category '$word'")} | |
676 | } | |
677 | ||
678 | ${^WARNING_BITS} = $mask ; | |
599cee73 PM |
679 | } |
680 | ||
9df0f64f MK |
681 | my %builtin_type; @builtin_type{qw(SCALAR ARRAY HASH CODE REF GLOB LVALUE Regexp)} = (); |
682 | ||
7e6d00f8 | 683 | sub __chk |
599cee73 | 684 | { |
d3a7d8c7 GS |
685 | my $category ; |
686 | my $offset ; | |
7e6d00f8 | 687 | my $isobj = 0 ; |
d3a7d8c7 GS |
688 | |
689 | if (@_) { | |
690 | # check the category supplied. | |
691 | $category = shift ; | |
9df0f64f MK |
692 | if (my $type = ref $category) { |
693 | Croaker("not an object") | |
694 | if exists $builtin_type{$type}; | |
695 | $category = $type; | |
7e6d00f8 PM |
696 | $isobj = 1 ; |
697 | } | |
d3a7d8c7 | 698 | $offset = $Offsets{$category}; |
c3186b65 | 699 | Croaker("Unknown warnings category '$category'") |
d3a7d8c7 GS |
700 | unless defined $offset; |
701 | } | |
702 | else { | |
0ca4541c | 703 | $category = (caller(1))[0] ; |
d3a7d8c7 | 704 | $offset = $Offsets{$category}; |
c3186b65 | 705 | Croaker("package '$category' not registered for warnings") |
d3a7d8c7 GS |
706 | unless defined $offset ; |
707 | } | |
708 | ||
0ca4541c | 709 | my $this_pkg = (caller(1))[0] ; |
7e6d00f8 PM |
710 | my $i = 2 ; |
711 | my $pkg ; | |
712 | ||
713 | if ($isobj) { | |
714 | while (do { { package DB; $pkg = (caller($i++))[0] } } ) { | |
715 | last unless @DB::args && $DB::args[0] =~ /^$category=/ ; | |
716 | } | |
717 | $i -= 2 ; | |
718 | } | |
719 | else { | |
4f527b71 | 720 | $i = _error_loc(); # see where Carp will allocate the error |
7e6d00f8 PM |
721 | } |
722 | ||
0ca4541c | 723 | my $callers_bitmask = (caller($i))[9] ; |
7e6d00f8 PM |
724 | return ($callers_bitmask, $offset, $i) ; |
725 | } | |
726 | ||
4f527b71 AS |
727 | sub _error_loc { |
728 | require Carp::Heavy; | |
729 | goto &Carp::short_error_loc; # don't introduce another stack frame | |
730 | } | |
731 | ||
7e6d00f8 PM |
732 | sub enabled |
733 | { | |
c3186b65 | 734 | Croaker("Usage: warnings::enabled([category])") |
7e6d00f8 PM |
735 | unless @_ == 1 || @_ == 0 ; |
736 | ||
737 | my ($callers_bitmask, $offset, $i) = __chk(@_) ; | |
738 | ||
739 | return 0 unless defined $callers_bitmask ; | |
d3a7d8c7 GS |
740 | return vec($callers_bitmask, $offset, 1) || |
741 | vec($callers_bitmask, $Offsets{'all'}, 1) ; | |
599cee73 PM |
742 | } |
743 | ||
d3a7d8c7 | 744 | |
e476b1b5 GS |
745 | sub warn |
746 | { | |
c3186b65 | 747 | Croaker("Usage: warnings::warn([category,] 'message')") |
d3a7d8c7 | 748 | unless @_ == 2 || @_ == 1 ; |
d3a7d8c7 | 749 | |
7e6d00f8 PM |
750 | my $message = pop ; |
751 | my ($callers_bitmask, $offset, $i) = __chk(@_) ; | |
09e96b99 | 752 | require Carp; |
8becbb3b | 753 | Carp::croak($message) |
d3a7d8c7 GS |
754 | if vec($callers_bitmask, $offset+1, 1) || |
755 | vec($callers_bitmask, $Offsets{'all'}+1, 1) ; | |
8becbb3b | 756 | Carp::carp($message) ; |
e476b1b5 GS |
757 | } |
758 | ||
7e6d00f8 PM |
759 | sub warnif |
760 | { | |
c3186b65 | 761 | Croaker("Usage: warnings::warnif([category,] 'message')") |
7e6d00f8 PM |
762 | unless @_ == 2 || @_ == 1 ; |
763 | ||
764 | my $message = pop ; | |
765 | my ($callers_bitmask, $offset, $i) = __chk(@_) ; | |
7e6d00f8 | 766 | |
0ca4541c | 767 | return |
7e6d00f8 PM |
768 | unless defined $callers_bitmask && |
769 | (vec($callers_bitmask, $offset, 1) || | |
770 | vec($callers_bitmask, $Offsets{'all'}, 1)) ; | |
771 | ||
09e96b99 | 772 | require Carp; |
8becbb3b | 773 | Carp::croak($message) |
7e6d00f8 PM |
774 | if vec($callers_bitmask, $offset+1, 1) || |
775 | vec($callers_bitmask, $Offsets{'all'}+1, 1) ; | |
776 | ||
8becbb3b | 777 | Carp::carp($message) ; |
7e6d00f8 | 778 | } |
0d658bf5 | 779 | |
599cee73 | 780 | 1; |