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1 | #!./perl |
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2 | # |
3 | # This is a home for regular expression tests that don't fit into |
4 | # the format supported by op/regexp.t. If you want to add a test |
5 | # that does fit that format, add it to op/re_tests, not here. |
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6 | |
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7 | # $RCSfile: pat.t,v $$Revision: 4.1 $$Date: 92/08/07 18:28:12 $ |
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8 | |
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9 | print "1..135\n"; |
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10 | |
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11 | BEGIN { |
12 | chdir 't' if -d 't'; |
13 | @INC = "../lib" if -d "../lib"; |
14 | } |
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15 | eval 'use Config'; # Defaults assumed if this fails |
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16 | |
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17 | $ENV{PERL_DESTRUCT_LEVEL} = 0; # XXX known to leaks scalars |
18 | |
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19 | $x = "abc\ndef\n"; |
20 | |
21 | if ($x =~ /^abc/) {print "ok 1\n";} else {print "not ok 1\n";} |
22 | if ($x !~ /^def/) {print "ok 2\n";} else {print "not ok 2\n";} |
23 | |
24 | $* = 1; |
25 | if ($x =~ /^def/) {print "ok 3\n";} else {print "not ok 3\n";} |
26 | $* = 0; |
27 | |
28 | $_ = '123'; |
29 | if (/^([0-9][0-9]*)/) {print "ok 4\n";} else {print "not ok 4\n";} |
30 | |
31 | if ($x =~ /^xxx/) {print "not ok 5\n";} else {print "ok 5\n";} |
32 | if ($x !~ /^abc/) {print "not ok 6\n";} else {print "ok 6\n";} |
33 | |
34 | if ($x =~ /def/) {print "ok 7\n";} else {print "not ok 7\n";} |
35 | if ($x !~ /def/) {print "not ok 8\n";} else {print "ok 8\n";} |
36 | |
37 | if ($x !~ /.def/) {print "ok 9\n";} else {print "not ok 9\n";} |
38 | if ($x =~ /.def/) {print "not ok 10\n";} else {print "ok 10\n";} |
39 | |
40 | if ($x =~ /\ndef/) {print "ok 11\n";} else {print "not ok 11\n";} |
41 | if ($x !~ /\ndef/) {print "not ok 12\n";} else {print "ok 12\n";} |
42 | |
43 | $_ = 'aaabbbccc'; |
44 | if (/(a*b*)(c*)/ && $1 eq 'aaabbb' && $2 eq 'ccc') { |
45 | print "ok 13\n"; |
46 | } else { |
47 | print "not ok 13\n"; |
48 | } |
49 | if (/(a+b+c+)/ && $1 eq 'aaabbbccc') { |
50 | print "ok 14\n"; |
51 | } else { |
52 | print "not ok 14\n"; |
53 | } |
54 | |
55 | if (/a+b?c+/) {print "not ok 15\n";} else {print "ok 15\n";} |
56 | |
57 | $_ = 'aaabccc'; |
58 | if (/a+b?c+/) {print "ok 16\n";} else {print "not ok 16\n";} |
59 | if (/a*b+c*/) {print "ok 17\n";} else {print "not ok 17\n";} |
60 | |
61 | $_ = 'aaaccc'; |
62 | if (/a*b?c*/) {print "ok 18\n";} else {print "not ok 18\n";} |
63 | if (/a*b+c*/) {print "not ok 19\n";} else {print "ok 19\n";} |
64 | |
65 | $_ = 'abcdef'; |
66 | if (/bcd|xyz/) {print "ok 20\n";} else {print "not ok 20\n";} |
67 | if (/xyz|bcd/) {print "ok 21\n";} else {print "not ok 21\n";} |
68 | |
69 | if (m|bc/*d|) {print "ok 22\n";} else {print "not ok 22\n";} |
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70 | |
71 | if (/^$_$/) {print "ok 23\n";} else {print "not ok 23\n";} |
72 | |
73 | $* = 1; # test 3 only tested the optimized version--this one is for real |
74 | if ("ab\ncd\n" =~ /^cd/) {print "ok 24\n";} else {print "not ok 24\n";} |
75 | $* = 0; |
76 | |
77 | $XXX{123} = 123; |
78 | $XXX{234} = 234; |
79 | $XXX{345} = 345; |
80 | |
81 | @XXX = ('ok 25','not ok 25', 'ok 26','not ok 26','not ok 27'); |
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82 | while ($_ = shift(@XXX)) { |
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83 | ?(.*)? && (print $1,"\n"); |
84 | /not/ && reset; |
85 | /not ok 26/ && reset 'X'; |
86 | } |
87 | |
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88 | while (($key,$val) = each(%XXX)) { |
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89 | print "not ok 27\n"; |
90 | exit; |
91 | } |
92 | |
93 | print "ok 27\n"; |
94 | |
95 | 'cde' =~ /[^ab]*/; |
96 | 'xyz' =~ //; |
97 | if ($& eq 'xyz') {print "ok 28\n";} else {print "not ok 28\n";} |
98 | |
99 | $foo = '[^ab]*'; |
100 | 'cde' =~ /$foo/; |
101 | 'xyz' =~ //; |
102 | if ($& eq 'xyz') {print "ok 29\n";} else {print "not ok 29\n";} |
103 | |
104 | $foo = '[^ab]*'; |
105 | 'cde' =~ /$foo/; |
106 | 'xyz' =~ /$null/; |
107 | if ($& eq 'xyz') {print "ok 30\n";} else {print "not ok 30\n";} |
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108 | |
109 | $_ = 'abcdefghi'; |
110 | /def/; # optimized up to cmd |
111 | if ("$`:$&:$'" eq 'abc:def:ghi') {print "ok 31\n";} else {print "not ok 31\n";} |
112 | |
113 | /cde/ + 0; # optimized only to spat |
114 | if ("$`:$&:$'" eq 'ab:cde:fghi') {print "ok 32\n";} else {print "not ok 32\n";} |
115 | |
116 | /[d][e][f]/; # not optimized |
117 | if ("$`:$&:$'" eq 'abc:def:ghi') {print "ok 33\n";} else {print "not ok 33\n";} |
118 | |
119 | $_ = 'now is the {time for all} good men to come to.'; |
120 | / {([^}]*)}/; |
121 | if ($1 eq 'time for all') {print "ok 34\n";} else {print "not ok 34 $1\n";} |
122 | |
123 | $_ = 'xxx {3,4} yyy zzz'; |
124 | print /( {3,4})/ ? "ok 35\n" : "not ok 35\n"; |
125 | print $1 eq ' ' ? "ok 36\n" : "not ok 36\n"; |
126 | print /( {4,})/ ? "not ok 37\n" : "ok 37\n"; |
127 | print /( {2,3}.)/ ? "ok 38\n" : "not ok 38\n"; |
128 | print $1 eq ' y' ? "ok 39\n" : "not ok 39\n"; |
129 | print /(y{2,3}.)/ ? "ok 40\n" : "not ok 40\n"; |
130 | print $1 eq 'yyy ' ? "ok 41\n" : "not ok 41\n"; |
131 | print /x {3,4}/ ? "not ok 42\n" : "ok 42\n"; |
132 | print /^xxx {3,4}/ ? "not ok 43\n" : "ok 43\n"; |
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133 | |
134 | $_ = "now is the time for all good men to come to."; |
135 | @words = /(\w+)/g; |
136 | print join(':',@words) eq "now:is:the:time:for:all:good:men:to:come:to" |
137 | ? "ok 44\n" |
138 | : "not ok 44\n"; |
139 | |
140 | @words = (); |
141 | while (/\w+/g) { |
142 | push(@words, $&); |
143 | } |
144 | print join(':',@words) eq "now:is:the:time:for:all:good:men:to:come:to" |
145 | ? "ok 45\n" |
146 | : "not ok 45\n"; |
147 | |
148 | @words = (); |
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149 | pos = 0; |
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150 | while (/to/g) { |
151 | push(@words, $&); |
152 | } |
153 | print join(':',@words) eq "to:to" |
154 | ? "ok 46\n" |
71be2cbc |
155 | : "not ok 46 `@words'\n"; |
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156 | |
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157 | pos $_ = 0; |
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158 | @words = /to/g; |
159 | print join(':',@words) eq "to:to" |
160 | ? "ok 47\n" |
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161 | : "not ok 47 `@words'\n"; |
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162 | |
163 | $_ = "abcdefghi"; |
164 | |
165 | $pat1 = 'def'; |
166 | $pat2 = '^def'; |
167 | $pat3 = '.def.'; |
168 | $pat4 = 'abc'; |
169 | $pat5 = '^abc'; |
170 | $pat6 = 'abc$'; |
171 | $pat7 = 'ghi'; |
172 | $pat8 = '\w*ghi'; |
173 | $pat9 = 'ghi$'; |
174 | |
175 | $t1=$t2=$t3=$t4=$t5=$t6=$t7=$t8=$t9=0; |
176 | |
177 | for $iter (1..5) { |
178 | $t1++ if /$pat1/o; |
179 | $t2++ if /$pat2/o; |
180 | $t3++ if /$pat3/o; |
181 | $t4++ if /$pat4/o; |
182 | $t5++ if /$pat5/o; |
183 | $t6++ if /$pat6/o; |
184 | $t7++ if /$pat7/o; |
185 | $t8++ if /$pat8/o; |
186 | $t9++ if /$pat9/o; |
187 | } |
188 | |
189 | $x = "$t1$t2$t3$t4$t5$t6$t7$t8$t9"; |
190 | print $x eq '505550555' ? "ok 48\n" : "not ok 48 $x\n"; |
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191 | |
192 | $xyz = 'xyz'; |
193 | print "abc" =~ /^abc$|$xyz/ ? "ok 49\n" : "not ok 49\n"; |
194 | |
195 | # perl 4.009 says "unmatched ()" |
196 | eval '"abc" =~ /a(bc$)|$xyz/; $result = "$&:$1"'; |
197 | print $@ eq "" ? "ok 50\n" : "not ok 50\n"; |
198 | print $result eq "abc:bc" ? "ok 51\n" : "not ok 51\n"; |
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199 | |
200 | |
201 | $_="abcfooabcbar"; |
202 | $x=/abc/g; |
203 | print $` eq "" ? "ok 52\n" : "not ok 52\n" if $x; |
204 | $x=/abc/g; |
205 | print $` eq "abcfoo" ? "ok 53\n" : "not ok 53\n" if $x; |
206 | $x=/abc/g; |
207 | print $x == 0 ? "ok 54\n" : "not ok 54\n"; |
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208 | pos = 0; |
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209 | $x=/ABC/gi; |
210 | print $` eq "" ? "ok 55\n" : "not ok 55\n" if $x; |
211 | $x=/ABC/gi; |
212 | print $` eq "abcfoo" ? "ok 56\n" : "not ok 56\n" if $x; |
213 | $x=/ABC/gi; |
214 | print $x == 0 ? "ok 57\n" : "not ok 57\n"; |
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215 | pos = 0; |
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216 | $x=/abc/g; |
217 | print $' eq "fooabcbar" ? "ok 58\n" : "not ok 58\n" if $x; |
218 | $x=/abc/g; |
219 | print $' eq "bar" ? "ok 59\n" : "not ok 59\n" if $x; |
220 | $_ .= ''; |
221 | @x=/abc/g; |
222 | print scalar @x == 2 ? "ok 60\n" : "not ok 60\n"; |
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223 | |
224 | $_ = "abdc"; |
225 | pos $_ = 2; |
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226 | /\Gc/gc; |
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227 | print "not " if (pos $_) != 2; |
228 | print "ok 61\n"; |
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229 | /\Gc/g; |
230 | print "not " if defined pos $_; |
231 | print "ok 62\n"; |
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232 | |
233 | $out = 1; |
234 | 'abc' =~ m'a(?{ $out = 2 })b'; |
235 | print "not " if $out != 2; |
236 | print "ok 63\n"; |
237 | |
238 | $out = 1; |
239 | 'abc' =~ m'a(?{ $out = 3 })c'; |
240 | print "not " if $out != 1; |
241 | print "ok 64\n"; |
242 | |
243 | $_ = 'foobar1 bar2 foobar3 barfoobar5 foobar6'; |
244 | @out = /(?<!foo)bar./g; |
245 | print "not " if "@out" ne 'bar2 barf'; |
246 | print "ok 65\n"; |
247 | |
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248 | # Tests which depend on REG_INFTY |
249 | $reg_infty = defined $Config{reg_infty} ? $Config{reg_infty} : 32767; |
250 | $reg_infty_m = $reg_infty - 1; $reg_infty_p = $reg_infty + 1; |
251 | |
252 | # As well as failing if the pattern matches do unexpected things, the |
253 | # next three tests will fail if you should have picked up a lower-than- |
254 | # default value for $reg_infty from Config.pm, but have not. |
255 | |
256 | undef $@; |
257 | print "not " if eval q(('aaa' =~ /(a{1,$reg_infty_m})/)[0] ne 'aaa') || $@; |
258 | print "ok 66\n"; |
259 | |
260 | undef $@; |
261 | print "not " if eval q(('a' x $reg_infty_m) !~ /a{$reg_infty_m}/) || $@; |
262 | print "ok 67\n"; |
263 | |
264 | undef $@; |
265 | print "not " if eval q(('a' x ($reg_infty_m - 1)) =~ /a{$reg_infty_m}/) || $@; |
266 | print "ok 68\n"; |
267 | |
268 | undef $@; |
269 | eval "'aaa' =~ /a{1,$reg_infty}/"; |
270 | print "not " if $@ !~ m%^\Q/a{1,$reg_infty}/: Quantifier in {,} bigger than%; |
271 | print "ok 69\n"; |
272 | |
273 | eval "'aaa' =~ /a{1,$reg_infty_p}/"; |
274 | print "not " |
275 | if $@ !~ m%^\Q/a{1,$reg_infty_p}/: Quantifier in {,} bigger than%; |
276 | print "ok 70\n"; |
277 | undef $@; |
278 | |
279 | # Poke a couple more parse failures |
280 | |
281 | $context = 'x' x 256; |
282 | eval qq("${context}y" =~ /(?<=$context)y/); |
283 | print "not " if $@ !~ m%^\Q/(?<=\Ex+/: lookbehind longer than 255 not%; |
284 | print "ok 71\n"; |
285 | |
286 | # This one will fail when POSIX character classes do get implemented |
287 | { |
288 | my $w; |
289 | local $^W = 1; |
290 | local $SIG{__WARN__} = sub{$w = shift}; |
291 | eval q('a' =~ /[[:alpha:]]/); |
292 | print "not " if $w !~ /^\QCharacter class syntax [: :] is reserved/; |
293 | } |
294 | print "ok 72\n"; |
295 | |
c277df42 |
296 | # Long Monsters |
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297 | $test = 73; |
c277df42 |
298 | for $l (125, 140, 250, 270, 300000, 30) { # Ordered to free memory |
299 | $a = 'a' x $l; |
300 | print "# length=$l\nnot " unless "ba$a=" =~ /a$a=/; |
301 | print "ok $test\n"; |
302 | $test++; |
303 | |
304 | print "not " if "b$a=" =~ /a$a=/; |
305 | print "ok $test\n"; |
306 | $test++; |
307 | } |
308 | |
309 | # 20000 nodes, each taking 3 words per string, and 1 per branch |
310 | $long_constant_len = join '|', 12120 .. 32645; |
311 | $long_var_len = join '|', 8120 .. 28645; |
312 | %ans = ( 'ax13876y25677lbc' => 1, |
313 | 'ax13876y25677mcb' => 0, # not b. |
314 | 'ax13876y35677nbc' => 0, # Num too big |
315 | 'ax13876y25677y21378obc' => 1, |
316 | 'ax13876y25677y21378zbc' => 0, # Not followed by [k-o] |
317 | 'ax13876y25677y21378y21378kbc' => 1, |
318 | 'ax13876y25677y21378y21378kcb' => 0, # Not b. |
319 | 'ax13876y25677y21378y21378y21378kbc' => 0, # 5 runs |
320 | ); |
321 | |
322 | for ( keys %ans ) { |
323 | print "# const-len `$_' not => $ans{$_}\nnot " |
324 | if $ans{$_} xor /a(?=([yx]($long_constant_len)){2,4}[k-o]).*b./o; |
325 | print "ok $test\n"; |
326 | $test++; |
327 | print "# var-len `$_' not => $ans{$_}\nnot " |
328 | if $ans{$_} xor /a(?=([yx]($long_var_len)){2,4}[k-o]).*b./o; |
329 | print "ok $test\n"; |
330 | $test++; |
331 | } |
332 | |
333 | $_ = " a (bla()) and x(y b((l)u((e))) and b(l(e)e)e"; |
334 | $expect = "(bla()) ((l)u((e))) (l(e)e)"; |
335 | |
336 | sub matchit { |
cc6b7395 |
337 | m/ |
c277df42 |
338 | ( |
339 | \( |
340 | (?{ $c = 1 }) # Initialize |
341 | (?: |
342 | (?(?{ $c == 0 }) # PREVIOUS iteration was OK, stop the loop |
343 | (?! |
344 | ) # Fail: will unwind one iteration back |
345 | ) |
346 | (?: |
347 | [^()]+ # Match a big chunk |
348 | (?= |
349 | [()] |
350 | ) # Do not try to match subchunks |
351 | | |
352 | \( |
353 | (?{ ++$c }) |
354 | | |
355 | \) |
356 | (?{ --$c }) |
357 | ) |
358 | )+ # This may not match with different subblocks |
359 | ) |
360 | (?(?{ $c != 0 }) |
361 | (?! |
362 | ) # Fail |
363 | ) # Otherwise the chunk 1 may succeed with $c>0 |
cc6b7395 |
364 | /xg; |
c277df42 |
365 | } |
366 | |
367 | push @ans, $res while $res = matchit; |
368 | |
369 | print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne "1 1 1"; |
370 | print "ok $test\n"; |
371 | $test++; |
372 | |
373 | @ans = matchit; |
374 | |
375 | print "# ans='@ans'\n# expect='$expect'\nnot " if "@ans" ne $expect; |
376 | print "ok $test\n"; |
377 | $test++; |
378 | |
379 | @ans = ('a/b' =~ m%(.*/)?(.*)%); # Stack may be bad |
380 | print "not " if "@ans" ne 'a/ b'; |
381 | print "ok $test\n"; |
382 | $test++; |
383 | |
cc6b7395 |
384 | $code = '{$blah = 45}'; |
c277df42 |
385 | $blah = 12; |
2cd61cdb |
386 | eval { /(?$code)/ }; |
387 | print "not " unless $@ and $@ =~ /not allowed at runtime/ and $blah == 12; |
e4d48cc9 |
388 | print "ok $test\n"; |
389 | $test++; |
390 | |
2cd61cdb |
391 | for $code ('{$blah = 45}','=xx') { |
392 | $blah = 12; |
393 | $res = eval { "xx" =~ /(?$code)/o }; |
394 | if ($code eq '=xx') { |
395 | print "#'$@','$res','$blah'\nnot " unless not $@ and $res; |
396 | } else { |
397 | print "#'$@','$res','$blah'\nnot " unless $@ and $@ =~ /not allowed at runtime/ and $blah == 12; |
398 | } |
399 | print "ok $test\n"; |
400 | $test++; |
401 | } |
402 | |
e4d48cc9 |
403 | $code = '{$blah = 45}'; |
404 | $blah = 12; |
405 | eval "/(?$code)/"; |
cc6b7395 |
406 | print "not " if $blah != 45; |
407 | print "ok $test\n"; |
408 | $test++; |
409 | |
410 | $blah = 12; |
411 | /(?{$blah = 45})/; |
c277df42 |
412 | print "not " if $blah != 45; |
413 | print "ok $test\n"; |
414 | $test++; |
415 | |
74d6a13a |
416 | $x = 'banana'; |
417 | $x =~ /.a/g; |
418 | print "not " unless pos($x) == 2; |
419 | print "ok $test\n"; |
420 | $test++; |
421 | |
422 | $x =~ /.z/gc; |
423 | print "not " unless pos($x) == 2; |
424 | print "ok $test\n"; |
425 | $test++; |
426 | |
427 | sub f { |
428 | my $p = $_[0]; |
429 | return $p; |
430 | } |
431 | |
432 | $x =~ /.a/g; |
433 | print "not " unless f(pos($x)) == 4; |
434 | print "ok $test\n"; |
435 | $test++; |
4599a1de |
436 | |
ce862d02 |
437 | $x = $^R = 67; |
438 | 'foot' =~ /foo(?{$x = 12; 75})[t]/; |
439 | print "not " unless $^R eq '75'; |
440 | print "ok $test\n"; |
441 | $test++; |
442 | |
443 | $x = $^R = 67; |
444 | 'foot' =~ /foo(?{$x = 12; 75})[xy]/; |
445 | print "not " unless $^R eq '67' and $x eq '12'; |
446 | print "ok $test\n"; |
447 | $test++; |
448 | |
449 | $x = $^R = 67; |
450 | 'foot' =~ /foo(?{ $^R + 12 })((?{ $x = 12; $^R + 17 })[xy])?/; |
451 | print "not " unless $^R eq '79' and $x eq '12'; |
452 | print "ok $test\n"; |
453 | $test++; |
454 | |
8782bef2 |
455 | print "not " unless qr/\b\v$/i eq '(?i-xsm:\bv$)'; |
456 | print "ok $test\n"; |
457 | $test++; |
458 | |
459 | print "not " unless qr/\b\v$/s eq '(?s-xim:\bv$)'; |
460 | print "ok $test\n"; |
461 | $test++; |
462 | |
463 | print "not " unless qr/\b\v$/m eq '(?m-xis:\bv$)'; |
464 | print "ok $test\n"; |
465 | $test++; |
466 | |
467 | print "not " unless qr/\b\v$/x eq '(?x-ism:\bv$)'; |
468 | print "ok $test\n"; |
469 | $test++; |
470 | |
471 | print "not " unless qr/\b\v$/xism eq '(?msix:\bv$)'; |
472 | print "ok $test\n"; |
473 | $test++; |
474 | |
475 | print "not " unless qr/\b\v$/ eq '(?-xism:\bv$)'; |
97197631 |
476 | print "ok $test\n"; |
477 | $test++; |
478 | |
7e5428c5 |
479 | $_ = 'xabcx'; |
480 | foreach $ans ('', 'c') { |
481 | /(?<=(?=a)..)((?=c)|.)/g; |
482 | print "not " unless $1 eq $ans; |
483 | print "ok $test\n"; |
484 | $test++; |
485 | } |
486 | |
487 | $_ = 'a'; |
488 | foreach $ans ('', 'a', '') { |
489 | /^|a|$/g; |
490 | print "not " unless $& eq $ans; |
491 | print "ok $test\n"; |
492 | $test++; |
493 | } |
494 | |
09f25ae4 |
495 | sub prefixify { |
496 | my($v,$a,$b,$res) = @_; |
497 | $v =~ s/\Q$a\E/$b/; |
498 | print "not " unless $res eq $v; |
499 | print "ok $test\n"; |
500 | $test++; |
501 | } |
502 | prefixify('/a/b/lib/arch', "/a/b/lib", 'X/lib', 'X/lib/arch'); |
503 | prefixify('/a/b/man/arch', "/a/b/man", 'X/man', 'X/man/arch'); |
504 | |
505 | $_ = 'var="foo"'; |
506 | /(\")/; |
507 | print "not " unless $1 and /$1/; |
508 | print "ok $test\n"; |
509 | $test++; |
510 | |
8782bef2 |
511 | $a=qr/(?{++$b})/; |
2cd61cdb |
512 | $b = 7; |
513 | /$a$a/; |
514 | print "not " unless $b eq '9'; |
515 | print "ok $test\n"; |
516 | $test++; |
517 | |
518 | $c="$a"; |
519 | /$a$a/; |
520 | print "not " unless $b eq '11'; |
521 | print "ok $test\n"; |
522 | $test++; |
523 | |
524 | { |
525 | use re "eval"; |
526 | /$a$c$a/; |
527 | print "not " unless $b eq '14'; |
528 | print "ok $test\n"; |
529 | $test++; |
530 | |
531 | no re "eval"; |
532 | $match = eval { /$a$c$a/ }; |
533 | print "not " |
534 | unless $b eq '14' and $@ =~ /Eval-group not allowed/ and not $match; |
535 | print "ok $test\n"; |
536 | $test++; |
537 | } |
538 | |
4599a1de |
539 | sub must_warn_pat { |
540 | my $warn_pat = shift; |
541 | return sub { print "not " unless $_[0] =~ /$warn_pat/ } |
542 | } |
543 | |
544 | sub must_warn { |
545 | my ($warn_pat, $code) = @_; |
546 | local $^W; local %SIG; |
547 | eval 'BEGIN { $^W = 1; $SIG{__WARN__} = $warn_pat };' . $code; |
548 | print "ok $test\n"; |
549 | $test++; |
550 | } |
551 | |
552 | |
553 | sub make_must_warn { |
554 | my $warn_pat = shift; |
555 | return sub { must_warn(must_warn_pat($warn_pat)) } |
556 | } |
557 | |
558 | my $for_future = make_must_warn('reserved for future extensions'); |
559 | |
560 | &$for_future('q(a:[b]:) =~ /[x[:foo:]]/'); |
561 | &$for_future('q(a=[b]=) =~ /[x[=foo=]]/'); |
562 | &$for_future('q(a.[b].) =~ /[x[.foo.]]/'); |