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[perl5.git] / t / re / subst.t
CommitLineData
25aae3a7 1#!./perl -w
d9d8d8de 2
a1a0e61e
TD
3BEGIN {
4 chdir 't' if -d 't';
20822f61 5 @INC = '../lib';
a1a0e61e
TD
6 require Config; import Config;
7}
344462d3 8
e8ebd21b 9require './test.pl';
84bb2957 10plan( tests => 170 );
4f4d7508
DC
11
12# Stolen from re/ReTest.pl. Can't just use the file since it doesn't support
13# like() and it conflicts with test.pl
14sub must_warn {
15 my ($code, $pattern, $name) = @_;
16 my $w;
17 local $SIG {__WARN__} = sub {$w .= join "" => @_};
18 use warnings 'all';
19 ref $code ? &$code : eval $code;
20 my $r = $w && $w =~ /$pattern/;
21 $w //= "UNDEF";
22 ok( $r, $name // "Got warning /$pattern/", $r ? undef :
23 "# expected: /$pattern/\n" .
24 "# result: $w" );
25}
26
27$_ = 'david';
28$a = s/david/rules/r;
29ok( $_ eq 'david' && $a eq 'rules', 'non-destructive substitute' );
30
31$a = "david" =~ s/david/rules/r;
32ok( $a eq 'rules', 's///r with constant' );
33
34$a = "david" =~ s/david/"is"."great"/er;
35ok( $a eq 'isgreat', 's///er' );
36
37$a = "daviddavid" =~ s/david/cool/gr;
38ok( $a eq 'coolcool', 's///gr' );
39
40$a = 'david';
41$b = $a =~ s/david/sucks/r =~ s/sucks/rules/r;
42ok( $a eq 'david' && $b eq 'rules', 'chained s///r' );
43
44$a = 'david';
45$b = $a =~ s/xxx/sucks/r;
46ok( $a eq 'david' && $b eq 'david', 'non matching s///r' );
47
48$a = 'david';
49for (0..2) {
50 ok( 'david' =~ s/$a/rules/ro eq 'rules', 's///ro '.$_ );
51}
52
53$a = 'david';
54eval '$b = $a !~ s/david/is great/r';
55like( $@, qr{Using !~ with s///r doesn't make sense}, 's///r !~ operator gives error' );
56
57{
58 no warnings 'uninitialized';
59 $a = undef;
60 $b = $a =~ s/left/right/r;
61 ok ( !defined $a && !defined $b, 's///r with undef input' );
62
63 use warnings;
64 must_warn sub { $b = $a =~ s/left/right/r }, '^Use of uninitialized value', 's///r Uninitialized warning';
65
66 $a = 'david';
67 must_warn 's/david/sucks/r; 1', '^Useless use of Non-destructive substitution', 's///r void context warning';
68}
69
70$a = '';
71$b = $a =~ s/david/rules/r;
72ok( $a eq '' && $b eq '', 's///r on empty string' );
73
74$_ = 'david';
75@b = s/david/rules/r;
76ok( $_ eq 'david' && $b[0] eq 'rules', 's///r in list context' );
77
78# Magic value and s///r
79require Tie::Scalar;
80tie $m, 'Tie::StdScalar'; # makes $a magical
81$m = "david";
82$b = $m =~ s/david/rules/r;
83ok( $m eq 'david' && $b eq 'rules', 's///r with magic input' );
84
85$m = $b =~ s/rules/david/r;
86ok( defined tied($m), 's///r magic isn\'t lost' );
87
88$b = $m =~ s/xxx/yyy/r;
89ok( ! defined tied($b), 's///r magic isn\'t contagious' );
d9d8d8de
LW
90
91$x = 'foo';
92$_ = "x";
93s/x/\$x/;
e8ebd21b 94ok( $_ eq '$x', ":$_: eq :\$x:" );
d9d8d8de
LW
95
96$_ = "x";
97s/x/$x/;
e8ebd21b 98ok( $_ eq 'foo', ":$_: eq :foo:" );
d9d8d8de
LW
99
100$_ = "x";
101s/x/\$x $x/;
e8ebd21b 102ok( $_ eq '$x foo', ":$_: eq :\$x foo:" );
d9d8d8de
LW
103
104$b = 'cd';
79072805 105($a = 'abcdef') =~ s<(b${b}e)>'\n$1';
e8ebd21b 106ok( $1 eq 'bcde' && $a eq 'a\n$1f', ":$1: eq :bcde: ; :$a: eq :a\\n\$1f:" );
d9d8d8de
LW
107
108$a = 'abacada';
e8ebd21b 109ok( ($a =~ s/a/x/g) == 4 && $a eq 'xbxcxdx' );
d9d8d8de 110
e8ebd21b 111ok( ($a =~ s/a/y/g) == 0 && $a eq 'xbxcxdx' );
d9d8d8de 112
e8ebd21b 113ok( ($a =~ s/b/y/g) == 1 && $a eq 'xyxcxdx' );
d9d8d8de
LW
114
115$_ = 'ABACADA';
e8ebd21b 116ok( /a/i && s///gi && $_ eq 'BCD' );
d9d8d8de
LW
117
118$_ = '\\' x 4;
e8ebd21b
RGS
119ok( length($_) == 4 );
120$snum = s/\\/\\\\/g;
121ok( $_ eq '\\' x 8 && $snum == 4 );
d9d8d8de
LW
122
123$_ = '\/' x 4;
e8ebd21b
RGS
124ok( length($_) == 8 );
125$snum = s/\//\/\//g;
126ok( $_ eq '\\//' x 4 && $snum == 4 );
127ok( length($_) == 12 );
d9d8d8de
LW
128
129$_ = 'aaaXXXXbbb';
130s/^a//;
e8ebd21b 131ok( $_ eq 'aaXXXXbbb' );
d9d8d8de
LW
132
133$_ = 'aaaXXXXbbb';
134s/a//;
e8ebd21b 135ok( $_ eq 'aaXXXXbbb' );
d9d8d8de
LW
136
137$_ = 'aaaXXXXbbb';
138s/^a/b/;
e8ebd21b 139ok( $_ eq 'baaXXXXbbb' );
d9d8d8de
LW
140
141$_ = 'aaaXXXXbbb';
142s/a/b/;
e8ebd21b 143ok( $_ eq 'baaXXXXbbb' );
d9d8d8de
LW
144
145$_ = 'aaaXXXXbbb';
146s/aa//;
e8ebd21b 147ok( $_ eq 'aXXXXbbb' );
d9d8d8de
LW
148
149$_ = 'aaaXXXXbbb';
150s/aa/b/;
e8ebd21b 151ok( $_ eq 'baXXXXbbb' );
d9d8d8de
LW
152
153$_ = 'aaaXXXXbbb';
154s/b$//;
e8ebd21b 155ok( $_ eq 'aaaXXXXbb' );
d9d8d8de
LW
156
157$_ = 'aaaXXXXbbb';
158s/b//;
e8ebd21b 159ok( $_ eq 'aaaXXXXbb' );
d9d8d8de
LW
160
161$_ = 'aaaXXXXbbb';
162s/bb//;
e8ebd21b 163ok( $_ eq 'aaaXXXXb' );
d9d8d8de
LW
164
165$_ = 'aaaXXXXbbb';
166s/aX/y/;
e8ebd21b 167ok( $_ eq 'aayXXXbbb' );
d9d8d8de
LW
168
169$_ = 'aaaXXXXbbb';
170s/Xb/z/;
e8ebd21b 171ok( $_ eq 'aaaXXXzbb' );
d9d8d8de
LW
172
173$_ = 'aaaXXXXbbb';
174s/aaX.*Xbb//;
e8ebd21b 175ok( $_ eq 'ab' );
d9d8d8de
LW
176
177$_ = 'aaaXXXXbbb';
178s/bb/x/;
e8ebd21b 179ok( $_ eq 'aaaXXXXxb' );
d9d8d8de
LW
180
181# now for some unoptimized versions of the same.
182
183$_ = 'aaaXXXXbbb';
184$x ne $x || s/^a//;
e8ebd21b 185ok( $_ eq 'aaXXXXbbb' );
d9d8d8de
LW
186
187$_ = 'aaaXXXXbbb';
188$x ne $x || s/a//;
e8ebd21b 189ok( $_ eq 'aaXXXXbbb' );
d9d8d8de
LW
190
191$_ = 'aaaXXXXbbb';
192$x ne $x || s/^a/b/;
e8ebd21b 193ok( $_ eq 'baaXXXXbbb' );
d9d8d8de
LW
194
195$_ = 'aaaXXXXbbb';
196$x ne $x || s/a/b/;
e8ebd21b 197ok( $_ eq 'baaXXXXbbb' );
d9d8d8de
LW
198
199$_ = 'aaaXXXXbbb';
200$x ne $x || s/aa//;
e8ebd21b 201ok( $_ eq 'aXXXXbbb' );
d9d8d8de
LW
202
203$_ = 'aaaXXXXbbb';
204$x ne $x || s/aa/b/;
e8ebd21b 205ok( $_ eq 'baXXXXbbb' );
d9d8d8de
LW
206
207$_ = 'aaaXXXXbbb';
208$x ne $x || s/b$//;
e8ebd21b 209ok( $_ eq 'aaaXXXXbb' );
d9d8d8de
LW
210
211$_ = 'aaaXXXXbbb';
212$x ne $x || s/b//;
e8ebd21b 213ok( $_ eq 'aaaXXXXbb' );
d9d8d8de
LW
214
215$_ = 'aaaXXXXbbb';
216$x ne $x || s/bb//;
e8ebd21b 217ok( $_ eq 'aaaXXXXb' );
d9d8d8de
LW
218
219$_ = 'aaaXXXXbbb';
220$x ne $x || s/aX/y/;
e8ebd21b 221ok( $_ eq 'aayXXXbbb' );
d9d8d8de
LW
222
223$_ = 'aaaXXXXbbb';
224$x ne $x || s/Xb/z/;
e8ebd21b 225ok( $_ eq 'aaaXXXzbb' );
d9d8d8de
LW
226
227$_ = 'aaaXXXXbbb';
228$x ne $x || s/aaX.*Xbb//;
e8ebd21b 229ok( $_ eq 'ab' );
d9d8d8de
LW
230
231$_ = 'aaaXXXXbbb';
232$x ne $x || s/bb/x/;
e8ebd21b 233ok( $_ eq 'aaaXXXXxb' );
d9d8d8de
LW
234
235$_ = 'abc123xyz';
c277df42 236s/(\d+)/$1*2/e; # yields 'abc246xyz'
e8ebd21b 237ok( $_ eq 'abc246xyz' );
c277df42 238s/(\d+)/sprintf("%5d",$1)/e; # yields 'abc 246xyz'
e8ebd21b 239ok( $_ eq 'abc 246xyz' );
c277df42 240s/(\w)/$1 x 2/eg; # yields 'aabbcc 224466xxyyzz'
e8ebd21b 241ok( $_ eq 'aabbcc 224466xxyyzz' );
d9d8d8de
LW
242
243$_ = "aaaaa";
e8ebd21b
RGS
244ok( y/a/b/ == 5 );
245ok( y/a/b/ == 0 );
246ok( y/b// == 5 );
247ok( y/b/c/s == 5 );
248ok( y/c// == 1 );
249ok( y/c//d == 1 );
250ok( $_ eq "" );
d9d8d8de
LW
251
252$_ = "Now is the %#*! time for all good men...";
e8ebd21b
RGS
253ok( ($x=(y/a-zA-Z //cd)) == 7 );
254ok( y/ / /s == 8 );
d9d8d8de 255
79072805
LW
256$_ = 'abcdefghijklmnopqrstuvwxyz0123456789';
257tr/a-z/A-Z/;
258
e8ebd21b 259ok( $_ eq 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' );
79072805
LW
260
261# same as tr/A-Z/a-z/;
e8ebd21b 262if (defined $Config{ebcdic} && $Config{ebcdic} eq 'define') { # EBCDIC.
6e68dac8 263 no utf8;
9d116dd7
JH
264 y[\301-\351][\201-\251];
265} else { # Ye Olde ASCII. Or something like it.
266 y[\101-\132][\141-\172];
267}
79072805 268
e8ebd21b 269ok( $_ eq 'abcdefghijklmnopqrstuvwxyz0123456789' );
79072805 270
e8ebd21b
RGS
271SKIP: {
272 skip("not ASCII",1) unless (ord("+") == ord(",") - 1
273 && ord(",") == ord("-") - 1
274 && ord("a") == ord("b") - 1
275 && ord("b") == ord("c") - 1);
276 $_ = '+,-';
277 tr/+--/a-c/;
278 ok( $_ eq 'abc' );
9d116dd7 279}
79072805
LW
280
281$_ = '+,-';
282tr/+\--/a\/c/;
e8ebd21b 283ok( $_ eq 'a,/' );
79072805
LW
284
285$_ = '+,-';
286tr/-+,/ab\-/;
e8ebd21b 287ok( $_ eq 'b-a' );
843b4603
TB
288
289
290# test recursive substitutions
291# code based on the recursive expansion of makefile variables
292
293my %MK = (
294 AAAAA => '$(B)', B=>'$(C)', C => 'D', # long->short
295 E => '$(F)', F=>'p $(G) q', G => 'HHHHH', # short->long
296 DIR => '$(UNDEFINEDNAME)/xxx',
297);
298sub var {
299 my($var,$level) = @_;
300 return "\$($var)" unless exists $MK{$var};
301 return exp_vars($MK{$var}, $level+1); # can recurse
302}
303sub exp_vars {
304 my($str,$level) = @_;
305 $str =~ s/\$\((\w+)\)/var($1, $level+1)/ge; # can recurse
306 #warn "exp_vars $level = '$str'\n";
307 $str;
308}
309
e8ebd21b
RGS
310ok( exp_vars('$(AAAAA)',0) eq 'D' );
311ok( exp_vars('$(E)',0) eq 'p HHHHH q' );
312ok( exp_vars('$(DIR)',0) eq '$(UNDEFINEDNAME)/xxx' );
313ok( exp_vars('foo $(DIR)/yyy bar',0) eq 'foo $(UNDEFINEDNAME)/xxx/yyy bar' );
3e3baf6d
TB
314
315$_ = "abcd";
c277df42 316s/(..)/$x = $1, m#.#/eg;
e8ebd21b 317ok( $x eq "cd", 'a match nested in the RHS of a substitution' );
fb73857a 318
c277df42
IZ
319# Subst and lookbehind
320
321$_="ccccc";
e8ebd21b
RGS
322$snum = s/(?<!x)c/x/g;
323ok( $_ eq "xxxxx" && $snum == 5 );
c277df42
IZ
324
325$_="ccccc";
e8ebd21b
RGS
326$snum = s/(?<!x)(c)/x/g;
327ok( $_ eq "xxxxx" && $snum == 5 );
c277df42
IZ
328
329$_="foobbarfoobbar";
e8ebd21b
RGS
330$snum = s/(?<!r)foobbar/foobar/g;
331ok( $_ eq "foobarfoobbar" && $snum == 1 );
c277df42
IZ
332
333$_="foobbarfoobbar";
e8ebd21b
RGS
334$snum = s/(?<!ar)(foobbar)/foobar/g;
335ok( $_ eq "foobarfoobbar" && $snum == 1 );
c277df42
IZ
336
337$_="foobbarfoobbar";
e8ebd21b
RGS
338$snum = s/(?<!ar)foobbar/foobar/g;
339ok( $_ eq "foobarfoobbar" && $snum == 1 );
c277df42 340
fb73857a
PP
341eval 's{foo} # this is a comment, not a delimiter
342 {bar};';
e8ebd21b 343ok( ! @?, 'parsing of split subst with comment' );
f3ea7b5e 344
ed02a3bf
DN
345$snum = eval '$_="exactly"; s sxsys;m 3(yactl)3;$1';
346is( $snum, 'yactl', 'alpha delimiters are allowed' );
347
f3ea7b5e 348$_="baacbaa";
e8ebd21b
RGS
349$snum = tr/a/b/s;
350ok( $_ eq "bbcbb" && $snum == 4,
351 'check if squashing works at the end of string' );
f3ea7b5e 352
2216f30a 353$_ = "ab";
e8ebd21b 354ok( s/a/b/ == 1 );
ce862d02
IZ
355
356$_ = <<'EOL';
357 $url = new URI::URL "http://www/"; die if $url eq "xXx";
358EOL
359$^R = 'junk';
360
361$foo = ' $@%#lowercase $@%# lowercase UPPERCASE$@%#UPPERCASE' .
362 ' $@%#lowercase$@%#lowercase$@%# lowercase lowercase $@%#lowercase' .
363 ' lowercase $@%#MiXeD$@%# ';
364
e8ebd21b 365$snum =
ce862d02
IZ
366s{ \d+ \b [,.;]? (?{ 'digits' })
367 |
368 [a-z]+ \b [,.;]? (?{ 'lowercase' })
369 |
370 [A-Z]+ \b [,.;]? (?{ 'UPPERCASE' })
371 |
372 [A-Z] [a-z]+ \b [,.;]? (?{ 'Capitalized' })
373 |
374 [A-Za-z]+ \b [,.;]? (?{ 'MiXeD' })
375 |
376 [A-Za-z0-9]+ \b [,.;]? (?{ 'alphanumeric' })
377 |
378 \s+ (?{ ' ' })
379 |
380 [^A-Za-z0-9\s]+ (?{ '$@%#' })
381}{$^R}xg;
e8ebd21b 382ok( $_ eq $foo );
8e5e9ebe
RGS
383ok( $snum == 31 );
384
385$_ = 'a' x 6;
386$snum = s/a(?{})//g;
387ok( $_ eq '' && $snum == 6 );
ce862d02 388
2beec16e 389$_ = 'x' x 20;
e8ebd21b 390$snum = s/(\d*|x)/<$1>/g;
2beec16e 391$foo = '<>' . ('<x><>' x 20) ;
e8ebd21b 392ok( $_ eq $foo && $snum == 41 );
ad94a511
IZ
393
394$t = 'aaaaaaaaa';
395
396$_ = $t;
397pos = 6;
e8ebd21b
RGS
398$snum = s/\Ga/xx/g;
399ok( $_ eq 'aaaaaaxxxxxx' && $snum == 3 );
ad94a511
IZ
400
401$_ = $t;
402pos = 6;
e8ebd21b
RGS
403$snum = s/\Ga/x/g;
404ok( $_ eq 'aaaaaaxxx' && $snum == 3 );
ad94a511
IZ
405
406$_ = $t;
407pos = 6;
408s/\Ga/xx/;
e8ebd21b 409ok( $_ eq 'aaaaaaxxaa' );
ad94a511
IZ
410
411$_ = $t;
412pos = 6;
413s/\Ga/x/;
e8ebd21b 414ok( $_ eq 'aaaaaaxaa' );
ad94a511
IZ
415
416$_ = $t;
e8ebd21b
RGS
417$snum = s/\Ga/xx/g;
418ok( $_ eq 'xxxxxxxxxxxxxxxxxx' && $snum == 9 );
ad94a511
IZ
419
420$_ = $t;
e8ebd21b
RGS
421$snum = s/\Ga/x/g;
422ok( $_ eq 'xxxxxxxxx' && $snum == 9 );
ad94a511
IZ
423
424$_ = $t;
425s/\Ga/xx/;
e8ebd21b 426ok( $_ eq 'xxaaaaaaaa' );
ad94a511
IZ
427
428$_ = $t;
429s/\Ga/x/;
e8ebd21b 430ok( $_ eq 'xaaaaaaaa' );
ad94a511 431
f5c9036e 432$_ = 'aaaa';
e8ebd21b
RGS
433$snum = s/\ba/./g;
434ok( $_ eq '.aaa' && $snum == 1 );
ad94a511 435
e9fa98b2 436eval q% s/a/"b"}/e %;
e8ebd21b 437ok( $@ =~ /Bad evalled substitution/ );
e9fa98b2 438eval q% ($_ = "x") =~ s/(.)/"$1 "/e %;
e8ebd21b 439ok( $_ eq "x " and !length $@ );
43a16006
HS
440$x = $x = 'interp';
441eval q% ($_ = "x") =~ s/x(($x)*)/"$1"/e %;
e8ebd21b 442ok( $_ eq '' and !length $@ );
e9fa98b2 443
653099ff 444$_ = "C:/";
e8ebd21b 445ok( !s/^([a-z]:)/\u$1/ );
e9fa98b2 446
12d33761 447$_ = "Charles Bronson";
e8ebd21b
RGS
448$snum = s/\B\w//g;
449ok( $_ eq "C B" && $snum == 12 );
5b71a6a7
A
450
451{
452 use utf8;
453 my $s = "H\303\266he";
454 my $l = my $r = $s;
455 $l =~ s/[^\w]//g;
456 $r =~ s/[^\w\.]//g;
aefe6dfc 457 is($l, $r, "use utf8 \\w");
5b71a6a7 458}
89afcb60
A
459
460my $pv1 = my $pv2 = "Andreas J. K\303\266nig";
461$pv1 =~ s/A/\x{100}/;
462substr($pv2,0,1) = "\x{100}";
463is($pv1, $pv2);
aefe6dfc 464
8e9639e9
JH
465SKIP: {
466 skip("EBCDIC", 3) if ord("A") == 193;
467
468 {
469 # Gregor Chrupala <gregor.chrupala@star-group.net>
470 use utf8;
471 $a = 'Espa&ntilde;a';
472 $a =~ s/&ntilde;/ñ/;
473 like($a, qr/ñ/, "use utf8 RHS");
474 }
475
476 {
477 use utf8;
478 $a = 'España España';
479 $a =~ s/ñ/&ntilde;/;
480 like($a, qr/ñ/, "use utf8 LHS");
481 }
482
483 {
484 use utf8;
485 $a = 'España';
486 $a =~ s/ñ/ñ/;
487 like($a, qr/ñ/, "use utf8 LHS and RHS");
488 }
aefe6dfc
JH
489}
490
8514a05a
JH
491{
492 # SADAHIRO Tomoyuki <bqw10602@nifty.com>
493
494 $a = "\x{100}\x{101}";
495 $a =~ s/\x{101}/\xFF/;
496 like($a, qr/\xFF/);
4a176938 497 is(length($a), 2, "SADAHIRO utf8 s///");
8514a05a
JH
498
499 $a = "\x{100}\x{101}";
500 $a =~ s/\x{101}/"\xFF"/e;
501 like($a, qr/\xFF/);
502 is(length($a), 2);
503
504 $a = "\x{100}\x{101}";
505 $a =~ s/\x{101}/\xFF\xFF\xFF/;
506 like($a, qr/\xFF\xFF\xFF/);
507 is(length($a), 4);
508
509 $a = "\x{100}\x{101}";
510 $a =~ s/\x{101}/"\xFF\xFF\xFF"/e;
511 like($a, qr/\xFF\xFF\xFF/);
512 is(length($a), 4);
513
514 $a = "\xFF\x{101}";
515 $a =~ s/\xFF/\x{100}/;
516 like($a, qr/\x{100}/);
517 is(length($a), 2);
518
519 $a = "\xFF\x{101}";
520 $a =~ s/\xFF/"\x{100}"/e;
521 like($a, qr/\x{100}/);
522 is(length($a), 2);
523
524 $a = "\xFF";
525 $a =~ s/\xFF/\x{100}/;
526 like($a, qr/\x{100}/);
527 is(length($a), 1);
528
529 $a = "\xFF";
530 $a =~ s/\xFF/"\x{100}"/e;
531 like($a, qr/\x{100}/);
532 is(length($a), 1);
533}
d6d0e86e
HS
534
535{
536 # subst with mixed utf8/non-utf8 type
537 my($ua, $ub, $uc, $ud) = ("\x{101}", "\x{102}", "\x{103}", "\x{104}");
538 my($na, $nb) = ("\x{ff}", "\x{fe}");
539 my $a = "$ua--$ub";
540 my $b;
541 ($b = $a) =~ s/--/$na/;
542 is($b, "$ua$na$ub", "s///: replace non-utf8 into utf8");
543 ($b = $a) =~ s/--/--$na--/;
544 is($b, "$ua--$na--$ub", "s///: replace long non-utf8 into utf8");
545 ($b = $a) =~ s/--/$uc/;
546 is($b, "$ua$uc$ub", "s///: replace utf8 into utf8");
547 ($b = $a) =~ s/--/--$uc--/;
548 is($b, "$ua--$uc--$ub", "s///: replace long utf8 into utf8");
549 $a = "$na--$nb";
550 ($b = $a) =~ s/--/$ua/;
551 is($b, "$na$ua$nb", "s///: replace utf8 into non-utf8");
552 ($b = $a) =~ s/--/--$ua--/;
553 is($b, "$na--$ua--$nb", "s///: replace long utf8 into non-utf8");
554
555 # now with utf8 pattern
556 $a = "$ua--$ub";
557 ($b = $a) =~ s/-($ud)?-/$na/;
558 is($b, "$ua$na$ub", "s///: replace non-utf8 into utf8 (utf8 pattern)");
559 ($b = $a) =~ s/-($ud)?-/--$na--/;
560 is($b, "$ua--$na--$ub", "s///: replace long non-utf8 into utf8 (utf8 pattern)");
561 ($b = $a) =~ s/-($ud)?-/$uc/;
562 is($b, "$ua$uc$ub", "s///: replace utf8 into utf8 (utf8 pattern)");
563 ($b = $a) =~ s/-($ud)?-/--$uc--/;
564 is($b, "$ua--$uc--$ub", "s///: replace long utf8 into utf8 (utf8 pattern)");
565 $a = "$na--$nb";
566 ($b = $a) =~ s/-($ud)?-/$ua/;
567 is($b, "$na$ua$nb", "s///: replace utf8 into non-utf8 (utf8 pattern)");
568 ($b = $a) =~ s/-($ud)?-/--$ua--/;
569 is($b, "$na--$ua--$nb", "s///: replace long utf8 into non-utf8 (utf8 pattern)");
570 ($b = $a) =~ s/-($ud)?-/$na/;
571 is($b, "$na$na$nb", "s///: replace non-utf8 into non-utf8 (utf8 pattern)");
572 ($b = $a) =~ s/-($ud)?-/--$na--/;
573 is($b, "$na--$na--$nb", "s///: replace long non-utf8 into non-utf8 (utf8 pattern)");
574}
575
6c8d78fb
HS
576$_ = 'aaaa';
577$r = 'x';
578$s = s/a(?{})/$r/g;
f14c76ed 579is("<$_> <$s>", "<xxxx> <4>", "[perl #7806]");
6c8d78fb
HS
580
581$_ = 'aaaa';
582$s = s/a(?{})//g;
f14c76ed 583is("<$_> <$s>", "<> <4>", "[perl #7806]");
6c8d78fb 584
f14c76ed
RGS
585# [perl #19048] Coredump in silly replacement
586{
587 local $^W = 0;
588 $_="abcdef\n";
589 s!.!!eg;
590 is($_, "\n", "[perl #19048]");
591}
592
4addbd3b
HS
593# [perl #17757] interaction between saw_ampersand and study
594{
595 my $f = eval q{ $& };
596 $f = "xx";
597 study $f;
598 $f =~ s/x/y/g;
599 is($f, "yy", "[perl #17757]");
600}
22e13caa
AE
601
602# [perl #20684] returned a zero count
603$_ = "1111";
604is(s/(??{1})/2/eg, 4, '#20684 s/// with (??{..}) inside');
605
83b43d92
AE
606# [perl #20682] @- not visible in replacement
607$_ = "123";
608/(2)/; # seed @- with something else
609s/(1)(2)(3)/$#- (@-)/;
610is($_, "3 (0 0 1 2)", '#20682 @- not visible in replacement');
611
76ec6486
AE
612# [perl #20682] $^N not visible in replacement
613$_ = "abc";
614/(a)/; s/(b)|(c)/-$^N/g;
615is($_,'a-b-c','#20682 $^N not visible in replacement');
7357df17
JH
616
617# [perl #22351] perl bug with 'e' substitution modifier
618my $name = "chris";
619{
620 no warnings 'uninitialized';
621 $name =~ s/hr//e;
622}
623is($name, "cis", q[#22351 bug with 'e' substitution modifier]);
01b35787
DM
624
625
626# [perl #34171] $1 didn't honour 'use bytes' in s//e
627{
628 my $s="\x{100}";
629 my $x;
630 {
631 use bytes;
632 $s=~ s/(..)/$x=$1/e
633 }
634 is(length($x), 2, '[perl #34171]');
635}
636
637
1749ea0d
ST
638{ # [perl #27940] perlbug: [\x00-\x1f] works, [\c@-\c_] does not
639 my $c;
640
641 ($c = "\x20\c@\x30\cA\x40\cZ\x50\c_\x60") =~ s/[\c@-\c_]//g;
642 is($c, "\x20\x30\x40\x50\x60", "s/[\\c\@-\\c_]//g");
643
644 ($c = "\x20\x00\x30\x01\x40\x1A\x50\x1F\x60") =~ s/[\x00-\x1f]//g;
645 is($c, "\x20\x30\x40\x50\x60", "s/[\\x00-\\x1f]//g");
646}
3be69782 647{
f0852a51
YO
648 $_ = "xy";
649 no warnings 'uninitialized';
650 /(((((((((x)))))))))(z)/; # clear $10
651 s/(((((((((x)))))))))(y)/${10}/;
652 is($_,"y","RT#6006: \$_ eq '$_'");
3be69782
RGS
653 $_ = "xr";
654 s/(((((((((x)))))))))(r)/fooba${10}/;
655 is($_,"foobar","RT#6006: \$_ eq '$_'");
f0852a51 656}
336b1602
YO
657{
658 my $want=("\n" x 11).("B\n" x 11)."B";
659 $_="B";
660 our $i;
661 for $i(1..11){
662 s/^.*$/$&/gm;
663 $_="\n$_\n$&";
664 }
665 is($want,$_,"RT#17542");
666}
1749ea0d 667
ce474962
NC
668{
669 my @tests = ('ABC', "\xA3\xA4\xA5", "\x{410}\x{411}\x{412}");
670 foreach (@tests) {
671 my $id = ord $_;
672 s/./pos/ge;
673 is($_, "012", "RT#52104: $id");
674 }
675}
831a7dd7
MM
676
677fresh_perl_is( '$_=q(foo);s/(.)\G//g;print' => 'foo', '[perl #69056] positive GPOS regex segfault' );
2c296965 678fresh_perl_is( '$_="abcef"; s/bc|(.)\G(.)/$1 ? "[$1-$2]" : "XX"/ge; print' => 'aXX[c-e][e-f]f', 'positive GPOS regex substitution failure' );
831a7dd7 679
92c404cd 680# [perl #71470] $var =~ s/$qr//e calling get-magic on $_ as well as $var
455d9033
FC
681{
682 local *_;
683 my $scratch;
684 sub qrBug::TIESCALAR { bless[pop], 'qrBug' }
685 sub qrBug::FETCH { $scratch .= "[fetching $_[0][0]]"; 'prew' }
686 sub qrBug::STORE{}
687 tie my $kror, qrBug => '$kror';
688 tie $_, qrBug => '$_';
689 my $qr = qr/(?:)/;
690 $kror =~ s/$qr/""/e;
691 is(
692 $scratch, '[fetching $kror]',
693 'bug: $var =~ s/$qr//e calling get-magic on $_ as well as $var',
694 );
695}
3e462cdc
KW
696
697{ # Bug #41530; replacing non-utf8 with a utf8 causes problems
698 my $string = "a\x{a0}a";
699 my $sub_string = $string;
700 ok(! utf8::is_utf8($sub_string), "Verify that string isn't initially utf8");
701 $sub_string =~ s/a/\x{100}/g;
702 ok(utf8::is_utf8($sub_string),
703 'Verify replace of non-utf8 with utf8 upgrades to utf8');
704 is($sub_string, "\x{100}\x{A0}\x{100}",
705 'Verify #41530 fixed: replace of non-utf8 with utf8');
706
707 my $non_sub_string = $string;
708 ok(! utf8::is_utf8($non_sub_string),
709 "Verify that string isn't initially utf8");
710 $non_sub_string =~ s/b/\x{100}/g;
711 ok(! utf8::is_utf8($non_sub_string),
712 "Verify that failed substitute doesn't change string's utf8ness");
713 is($non_sub_string, $string,
714 "Verify that failed substitute doesn't change string");
715}
84bb2957
KW
716
717{ # Verify largish octal in replacement pattern
718
719 my $string = "a";
720 $string =~ s/a/\400/;
721 is($string, chr 0x100, "Verify that handles s/foo/\\400/");
722 $string =~ s/./\600/;
723 is($string, chr 0x180, "Verify that handles s/foo/\\600/");
724 $string =~ s/./\777/;
725 is($string, chr 0x1FF, "Verify that handles s/foo/\\777/");
726}