This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
$overloaded .= $x: don't stringify $x
[perl5.git] / lib / overload.t
CommitLineData
3340ac37 1#!./perl -T
8ebc5c01
PP
2
3BEGIN {
4 chdir 't' if -d 't';
20822f61 5 @INC = '../lib';
78cd8b71 6 require Config;
98641f60 7 if (($Config::Config{'extensions'} !~ m!\bList/Util\b!) ){
78cd8b71
NC
8 print "1..0 # Skip -- Perl configured without List::Util module\n";
9 exit 0;
10 }
8ebc5c01
PP
11}
12
8ebc5c01
PP
13package Oscalar;
14use overload (
15 # Anonymous subroutines:
16'+' => sub {new Oscalar $ {$_[0]}+$_[1]},
17'-' => sub {new Oscalar
18 $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
19'<=>' => sub {new Oscalar
20 $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
21'cmp' => sub {new Oscalar
22 $_[2]? ($_[1] cmp ${$_[0]}) : (${$_[0]} cmp $_[1])},
23'*' => sub {new Oscalar ${$_[0]}*$_[1]},
24'/' => sub {new Oscalar
25 $_[2]? $_[1]/${$_[0]} :
26 ${$_[0]}/$_[1]},
27'%' => sub {new Oscalar
28 $_[2]? $_[1]%${$_[0]} : ${$_[0]}%$_[1]},
29'**' => sub {new Oscalar
30 $_[2]? $_[1]**${$_[0]} : ${$_[0]}-$_[1]},
31
32qw(
33"" stringify
b0bf6df7 340+ numify) # Order of arguments insignificant
8ebc5c01
PP
35);
36
37sub new {
38 my $foo = $_[1];
39 bless \$foo, $_[0];
40}
41
42sub stringify { "${$_[0]}" }
43sub numify { 0 + "${$_[0]}" } # Not needed, additional overhead
44 # comparing to direct compilation based on
45 # stringify
46
47package main;
48
8ebc5c01 49$| = 1;
9b513004 50BEGIN { require './test.pl'; require './charset_tools.pl' }
d7e75038 51plan tests => 5332;
b1fbf5c3 52
a02ec77a 53use Scalar::Util qw(tainted);
8ebc5c01
PP
54
55$a = new Oscalar "087";
56$b= "$a";
57
b1fbf5c3
NC
58is($b, $a);
59is($b, "087");
60is(ref $a, "Oscalar");
61is($a, $a);
62is($a, "087");
8ebc5c01
PP
63
64$c = $a + 7;
65
b1fbf5c3
NC
66is(ref $c, "Oscalar");
67isnt($c, $a);
68is($c, "94");
8ebc5c01
PP
69
70$b=$a;
71
b1fbf5c3 72is(ref $a, "Oscalar");
8ebc5c01
PP
73
74$b++;
75
b1fbf5c3
NC
76is(ref $b, "Oscalar");
77is($a, "087");
78is($b, "88");
79is(ref $a, "Oscalar");
8ebc5c01
PP
80
81$c=$b;
82$c-=$a;
83
b1fbf5c3
NC
84is(ref $c, "Oscalar");
85is($a, "087");
86is($c, "1");
87is(ref $a, "Oscalar");
8ebc5c01
PP
88
89$b=1;
90$b+=$a;
91
b1fbf5c3
NC
92is(ref $b, "Oscalar");
93is($a, "087");
94is($b, "88");
95is(ref $a, "Oscalar");
8ebc5c01
PP
96
97eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ];
98
99$b=$a;
100
b1fbf5c3 101is(ref $a, "Oscalar");
8ebc5c01
PP
102
103$b++;
104
b1fbf5c3
NC
105is(ref $b, "Oscalar");
106is($a, "087");
107is($b, "88");
108is(ref $a, "Oscalar");
8ebc5c01
PP
109
110package Oscalar;
111$dummy=bless \$dummy; # Now cache of method should be reloaded
112package main;
113
114$b=$a;
115$b++;
116
b1fbf5c3
NC
117is(ref $b, "Oscalar");
118is($a, "087");
119is($b, "88");
120is(ref $a, "Oscalar");
8ebc5c01 121
32251b26 122undef $b; # Destroying updates tables too...
8ebc5c01
PP
123
124eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ];
125
126$b=$a;
127
b1fbf5c3 128is(ref $a, "Oscalar");
8ebc5c01
PP
129
130$b++;
131
b1fbf5c3
NC
132is(ref $b, "Oscalar");
133is($a, "087");
bb4f579a 134is($b, "89");
b1fbf5c3 135is(ref $a, "Oscalar");
8ebc5c01
PP
136
137package Oscalar;
138$dummy=bless \$dummy; # Now cache of method should be reloaded
139package main;
140
141$b++;
142
b1fbf5c3
NC
143is(ref $b, "Oscalar");
144is($a, "087");
bb4f579a 145is($b, "91");
b1fbf5c3 146is(ref $a, "Oscalar");
8ebc5c01
PP
147
148$b=$a;
149$b++;
150
b1fbf5c3
NC
151is(ref $b, "Oscalar");
152is($a, "087");
153is($b, "89");
154is(ref $a, "Oscalar");
8ebc5c01
PP
155
156
b1fbf5c3 157ok($b? 1:0);
8ebc5c01
PP
158
159eval q[ package Oscalar; use overload ('=' => sub {$main::copies++;
160 package Oscalar;
161 local $new=$ {$_[0]};
162 bless \$new } ) ];
163
164$b=new Oscalar "$a";
165
b1fbf5c3
NC
166is(ref $b, "Oscalar");
167is($a, "087");
168is($b, "087");
169is(ref $a, "Oscalar");
8ebc5c01
PP
170
171$b++;
172
b1fbf5c3
NC
173is(ref $b, "Oscalar");
174is($a, "087");
175is($b, "89");
176is(ref $a, "Oscalar");
177is($copies, undef);
8ebc5c01
PP
178
179$b+=1;
180
b1fbf5c3
NC
181is(ref $b, "Oscalar");
182is($a, "087");
183is($b, "90");
184is(ref $a, "Oscalar");
185is($copies, undef);
8ebc5c01
PP
186
187$b=$a;
188$b+=1;
189
b1fbf5c3
NC
190is(ref $b, "Oscalar");
191is($a, "087");
192is($b, "88");
193is(ref $a, "Oscalar");
194is($copies, undef);
8ebc5c01
PP
195
196$b=$a;
197$b++;
198
b1fbf5c3
NC
199is(ref $b, "Oscalar");
200is($a, "087");
201is($b, "89");
202is(ref $a, "Oscalar");
203is($copies, 1);
8ebc5c01 204
69815d08 205eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1];
8ebc5c01
PP
206 $_[0] } ) ];
207$c=new Oscalar; # Cause rehash
208
209$b=$a;
210$b+=1;
211
b1fbf5c3
NC
212is(ref $b, "Oscalar");
213is($a, "087");
214is($b, "90");
215is(ref $a, "Oscalar");
216is($copies, 2);
8ebc5c01
PP
217
218$b+=$b;
219
b1fbf5c3
NC
220is(ref $b, "Oscalar");
221is($b, "360");
222is($copies, 2);
8ebc5c01
PP
223$b=-$b;
224
b1fbf5c3
NC
225is(ref $b, "Oscalar");
226is($b, "-360");
227is($copies, 2);
8ebc5c01
PP
228
229$b=abs($b);
230
b1fbf5c3
NC
231is(ref $b, "Oscalar");
232is($b, "360");
233is($copies, 2);
8ebc5c01
PP
234
235$b=abs($b);
236
b1fbf5c3
NC
237is(ref $b, "Oscalar");
238is($b, "360");
239is($copies, 2);
8ebc5c01
PP
240
241eval q[package Oscalar;
242 use overload ('x' => sub {new Oscalar ( $_[2] ? "_.$_[1]._" x $ {$_[0]}
243 : "_.${$_[0]}._" x $_[1])}) ];
244
245$a=new Oscalar "yy";
246$a x= 3;
b1fbf5c3 247is($a, "_.yy.__.yy.__.yy._");
8ebc5c01
PP
248
249eval q[package Oscalar;
250 use overload ('.' => sub {new Oscalar ( $_[2] ?
251 "_.$_[1].__.$ {$_[0]}._"
252 : "_.$ {$_[0]}.__.$_[1]._")}) ];
253
254$a=new Oscalar "xx";
255
b1fbf5c3 256is("b${a}c", "_._.b.__.xx._.__.c._");
8ebc5c01
PP
257
258# Check inheritance of overloading;
259{
260 package OscalarI;
261 @ISA = 'Oscalar';
262}
263
264$aI = new OscalarI "$a";
b1fbf5c3
NC
265is(ref $aI, "OscalarI");
266is("$aI", "xx");
267is($aI, "xx");
268is("b${aI}c", "_._.b.__.xx._.__.c._");
8ebc5c01 269
bb4f579a
DM
270# Here we test that both "no overload" and
271# blessing to a package update hash
8ebc5c01
PP
272
273eval "package Oscalar; no overload '.'";
274
bb4f579a 275is("b${a}", "bxx");
8ebc5c01
PP
276$x="1";
277bless \$x, Oscalar;
b1fbf5c3 278is("b${a}c", "bxxc");
8ebc5c01 279new Oscalar 1;
b1fbf5c3 280is("b${a}c", "bxxc");
8ebc5c01
PP
281
282# Negative overloading:
283
284$na = eval { ~$a };
b1fbf5c3 285like($@, qr/no method found/);
8ebc5c01
PP
286
287# Check AUTOLOADING:
288
289*Oscalar::AUTOLOAD =
290 sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ;
291 goto &{"Oscalar::$AUTOLOAD"}};
292
44a8e56a 293eval "package Oscalar; sub comple; use overload '~' => 'comple'";
8ebc5c01 294
bb4f579a
DM
295$na = eval { ~$a };
296is($@, '');
8ebc5c01
PP
297
298bless \$x, Oscalar;
299
300$na = eval { ~$a }; # Hash updated
1f874cb6 301warn "'$na', $@" if $@;
b1fbf5c3
NC
302ok !$@;
303is($na, '_!_xx_!_');
8ebc5c01
PP
304
305$na = 0;
306
bb4f579a 307$na = eval { ~$aI };
aaa63dae 308is($@, '');
8ebc5c01
PP
309
310bless \$x, OscalarI;
311
312$na = eval { ~$aI };
313print $@;
314
fdb7e2a2
NC
315ok(!$@);
316is($na, '_!_xx_!_');
8ebc5c01 317
44a8e56a 318eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'";
8ebc5c01 319
bb4f579a
DM
320$na = eval { $aI >> 1 };
321is($@, '');
8ebc5c01
PP
322
323bless \$x, OscalarI;
324
325$na = 0;
326
327$na = eval { $aI >> 1 };
328print $@;
329
fdb7e2a2
NC
330ok(!$@);
331is($na, '_!_xx_!_');
8ebc5c01 332
44a8e56a 333# warn overload::Method($a, '0+'), "\n";
fdb7e2a2
NC
334is(overload::Method($a, '0+'), \&Oscalar::numify);
335is(overload::Method($aI,'0+'), \&Oscalar::numify);
336ok(overload::Overloaded($aI));
337ok(!overload::Overloaded('overload'));
8ebc5c01 338
fdb7e2a2
NC
339ok(! defined overload::Method($aI, '<<'));
340ok(! defined overload::Method($a, '<'));
8ebc5c01 341
fdb7e2a2
NC
342like (overload::StrVal($aI), qr/^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/);
343is(overload::StrVal(\$aI), "@{[\$aI]}");
8ebc5c01 344
44a8e56a
PP
345# Check overloading by methods (specified deep in the ISA tree).
346{
347 package OscalarII;
348 @ISA = 'OscalarI';
349 sub Oscalar::lshft {"_<<_" . shift() . "_<<_"}
350 eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'";
351}
352
353$aaII = "087";
354$aII = \$aaII;
355bless $aII, 'OscalarII';
356bless \$fake, 'OscalarI'; # update the hash
fdb7e2a2 357is(($aI | 3), '_<<_xx_<<_');
44a8e56a 358# warn $aII << 3;
fdb7e2a2 359is(($aII << 3), '_<<_087_<<_');
44a8e56a 360
b3ac6de7
IZ
361{
362 BEGIN { $int = 7; overload::constant 'integer' => sub {$int++; shift}; }
363 $out = 2**10;
364}
fdb7e2a2
NC
365is($int, 9);
366is($out, 1024);
7898bf0b
RGS
367is($int, 9);
368{
369 BEGIN { overload::constant 'integer' => sub {$int++; shift()+1}; }
370 eval q{$out = 42};
371}
372is($int, 10);
373is($out, 43);
b3ac6de7
IZ
374
375$foo = 'foo';
376$foo1 = 'f\'o\\o';
377{
378 BEGIN { $q = $qr = 7;
379 overload::constant 'q' => sub {$q++; push @q, shift, ($_[1] || 'none'); shift},
380 'qr' => sub {$qr++; push @qr, shift, ($_[1] || 'none'); shift}; }
381 $out = 'foo';
382 $out1 = 'f\'o\\o';
383 $out2 = "a\a$foo,\,";
384 /b\b$foo.\./;
385}
386
fdb7e2a2
NC
387is($out, 'foo');
388is($out, $foo);
389is($out1, 'f\'o\\o');
390is($out1, $foo1);
391is($out2, "a\afoo,\,");
392is("@q", "foo q f'o\\\\o q a\\a qq ,\\, qq");
393is($q, 11);
394is("@qr", "b\\b qq .\\. qq");
395is($qr, 9);
b3ac6de7
IZ
396
397{
398 $_ = '!<b>!foo!<-.>!';
399 BEGIN { overload::constant 'q' => sub {push @q1, shift, ($_[1] || 'none'); "_<" . (shift) . ">_"},
400 'qr' => sub {push @qr1, shift, ($_[1] || 'none'); "!<" . (shift) . ">!"}; }
401 $out = 'foo';
402 $out1 = 'f\'o\\o';
403 $out2 = "a\a$foo,\,";
404 $res = /b\b$foo.\./;
405 $a = <<EOF;
406oups
407EOF
408 $b = <<'EOF';
409oups1
410EOF
411 $c = bareword;
412 m'try it';
413 s'first part'second part';
414 s/yet another/tail here/;
c2e66d9e 415 tr/A-Z/a-z/;
b3ac6de7
IZ
416}
417
fdb7e2a2
NC
418is($out, '_<foo>_');
419is($out1, '_<f\'o\\o>_');
420is($out2, "_<a\a>_foo_<,\,>_");
421is("@q1", "foo q f'o\\\\o q a\\a qq ,\\, qq oups
b3ac6de7 422 qq oups1
fdb7e2a2
NC
423 q second part q tail here s A-Z tr a-z tr");
424is("@qr1", "b\\b qq .\\. qq try it q first part q yet another qq");
425is($res, 1);
426is($a, "_<oups
427>_");
428is($b, "_<oups1
429>_");
430is($c, "bareword");
b3ac6de7 431
ee239bfe
IZ
432{
433 package symbolic; # Primitive symbolic calculator
434 use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num,
435 '=' => \&cpy, '++' => \&inc, '--' => \&dec;
436
437 sub new { shift; bless ['n', @_] }
438 sub cpy {
439 my $self = shift;
440 bless [@$self], ref $self;
441 }
442 sub inc { $_[0] = bless ['++', $_[0], 1]; }
443 sub dec { $_[0] = bless ['--', $_[0], 1]; }
444 sub wrap {
445 my ($obj, $other, $inv, $meth) = @_;
446 if ($meth eq '++' or $meth eq '--') {
447 @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference
448 return $obj;
449 }
450 ($obj, $other) = ($other, $obj) if $inv;
451 bless [$meth, $obj, $other];
452 }
453 sub str {
454 my ($meth, $a, $b) = @{+shift};
455 $a = 'u' unless defined $a;
456 if (defined $b) {
457 "[$meth $a $b]";
458 } else {
459 "[$meth $a]";
460 }
461 }
462 my %subr = ( 'n' => sub {$_[0]} );
463 foreach my $op (split " ", $overload::ops{with_assign}) {
464 $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}";
465 }
466 my @bins = qw(binary 3way_comparison num_comparison str_comparison);
467 foreach my $op (split " ", "@overload::ops{ @bins }") {
468 $subr{$op} = eval "sub {shift() $op shift()}";
469 }
470 foreach my $op (split " ", "@overload::ops{qw(unary func)}") {
471 $subr{$op} = eval "sub {$op shift()}";
472 }
473 $subr{'++'} = $subr{'+'};
474 $subr{'--'} = $subr{'-'};
475
476 sub num {
477 my ($meth, $a, $b) = @{+shift};
478 my $subr = $subr{$meth}
479 or die "Do not know how to ($meth) in symbolic";
480 $a = $a->num if ref $a eq __PACKAGE__;
481 $b = $b->num if ref $b eq __PACKAGE__;
482 $subr->($a,$b);
483 }
484 sub TIESCALAR { my $pack = shift; $pack->new(@_) }
485 sub FETCH { shift }
486 sub nop { } # Around a bug
487 sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; }
488 sub STORE {
489 my $obj = shift;
490 $#$obj = 1;
a1063b2d 491 $obj->[1] = shift;
ee239bfe
IZ
492 }
493}
494
495{
496 my $foo = new symbolic 11;
497 my $baz = $foo++;
fdb7e2a2
NC
498 is((sprintf "%d", $foo), '12');
499 is((sprintf "%d", $baz), '11');
ee239bfe
IZ
500 my $bar = $foo;
501 $baz = ++$foo;
fdb7e2a2
NC
502 is((sprintf "%d", $foo), '13');
503 is((sprintf "%d", $bar), '12');
504 is((sprintf "%d", $baz), '13');
ee239bfe
IZ
505 my $ban = $foo;
506 $baz = ($foo += 1);
fdb7e2a2
NC
507 is((sprintf "%d", $foo), '14');
508 is((sprintf "%d", $bar), '12');
509 is((sprintf "%d", $baz), '14');
510 is((sprintf "%d", $ban), '13');
ee239bfe
IZ
511 $baz = 0;
512 $baz = $foo++;
fdb7e2a2
NC
513 is((sprintf "%d", $foo), '15');
514 is((sprintf "%d", $baz), '14');
515 is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]');
ee239bfe
IZ
516}
517
518{
519 my $iter = new symbolic 2;
520 my $side = new symbolic 1;
521 my $cnt = $iter;
522
523 while ($cnt) {
524 $cnt = $cnt - 1; # The "simple" way
525 $side = (sqrt(1 + $side**2) - 1)/$side;
526 }
527 my $pi = $side*(2**($iter+2));
fdb7e2a2
NC
528 is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]');
529 is((sprintf "%f", $pi), '3.182598');
ee239bfe
IZ
530}
531
532{
533 my $iter = new symbolic 2;
534 my $side = new symbolic 1;
535 my $cnt = $iter;
536
537 while ($cnt--) {
538 $side = (sqrt(1 + $side**2) - 1)/$side;
539 }
540 my $pi = $side*(2**($iter+2));
fdb7e2a2
NC
541 is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]');
542 is((sprintf "%f", $pi), '3.182598');
ee239bfe
IZ
543}
544
545{
546 my ($a, $b);
547 symbolic->vars($a, $b);
548 my $c = sqrt($a**2 + $b**2);
549 $a = 3; $b = 4;
fdb7e2a2 550 is((sprintf "%d", $c), '5');
ee239bfe 551 $a = 12; $b = 5;
fdb7e2a2 552 is((sprintf "%d", $c), '13');
ee239bfe
IZ
553}
554
555{
556 package symbolic1; # Primitive symbolic calculator
557 # Mutator inc/dec
558 use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, '=' => \&cpy;
559
560 sub new { shift; bless ['n', @_] }
561 sub cpy {
562 my $self = shift;
563 bless [@$self], ref $self;
564 }
565 sub wrap {
566 my ($obj, $other, $inv, $meth) = @_;
567 if ($meth eq '++' or $meth eq '--') {
568 @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference
569 return $obj;
570 }
571 ($obj, $other) = ($other, $obj) if $inv;
572 bless [$meth, $obj, $other];
573 }
574 sub str {
575 my ($meth, $a, $b) = @{+shift};
576 $a = 'u' unless defined $a;
577 if (defined $b) {
578 "[$meth $a $b]";
579 } else {
580 "[$meth $a]";
581 }
582 }
583 my %subr = ( 'n' => sub {$_[0]} );
584 foreach my $op (split " ", $overload::ops{with_assign}) {
585 $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}";
586 }
587 my @bins = qw(binary 3way_comparison num_comparison str_comparison);
588 foreach my $op (split " ", "@overload::ops{ @bins }") {
589 $subr{$op} = eval "sub {shift() $op shift()}";
590 }
591 foreach my $op (split " ", "@overload::ops{qw(unary func)}") {
592 $subr{$op} = eval "sub {$op shift()}";
593 }
594 $subr{'++'} = $subr{'+'};
595 $subr{'--'} = $subr{'-'};
596
597 sub num {
598 my ($meth, $a, $b) = @{+shift};
599 my $subr = $subr{$meth}
600 or die "Do not know how to ($meth) in symbolic";
601 $a = $a->num if ref $a eq __PACKAGE__;
602 $b = $b->num if ref $b eq __PACKAGE__;
603 $subr->($a,$b);
604 }
605 sub TIESCALAR { my $pack = shift; $pack->new(@_) }
606 sub FETCH { shift }
7dbf2beb 607 sub vars { my $p = shift; tie($_, $p) foreach @_; }
ee239bfe
IZ
608 sub STORE {
609 my $obj = shift;
610 $#$obj = 1;
a1063b2d 611 $obj->[1] = shift;
ee239bfe
IZ
612 }
613}
614
615{
616 my $foo = new symbolic1 11;
617 my $baz = $foo++;
fdb7e2a2
NC
618 is((sprintf "%d", $foo), '12');
619 is((sprintf "%d", $baz), '11');
ee239bfe
IZ
620 my $bar = $foo;
621 $baz = ++$foo;
fdb7e2a2
NC
622 is((sprintf "%d", $foo), '13');
623 is((sprintf "%d", $bar), '12');
624 is((sprintf "%d", $baz), '13');
ee239bfe
IZ
625 my $ban = $foo;
626 $baz = ($foo += 1);
fdb7e2a2
NC
627 is((sprintf "%d", $foo), '14');
628 is((sprintf "%d", $bar), '12');
629 is((sprintf "%d", $baz), '14');
630 is((sprintf "%d", $ban), '13');
ee239bfe
IZ
631 $baz = 0;
632 $baz = $foo++;
fdb7e2a2
NC
633 is((sprintf "%d", $foo), '15');
634 is((sprintf "%d", $baz), '14');
635 is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]');
ee239bfe
IZ
636}
637
638{
639 my $iter = new symbolic1 2;
640 my $side = new symbolic1 1;
641 my $cnt = $iter;
642
643 while ($cnt) {
644 $cnt = $cnt - 1; # The "simple" way
645 $side = (sqrt(1 + $side**2) - 1)/$side;
646 }
647 my $pi = $side*(2**($iter+2));
fdb7e2a2
NC
648 is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]');
649 is((sprintf "%f", $pi), '3.182598');
ee239bfe
IZ
650}
651
652{
653 my $iter = new symbolic1 2;
654 my $side = new symbolic1 1;
655 my $cnt = $iter;
656
657 while ($cnt--) {
658 $side = (sqrt(1 + $side**2) - 1)/$side;
659 }
660 my $pi = $side*(2**($iter+2));
fdb7e2a2
NC
661 is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]');
662 is((sprintf "%f", $pi), '3.182598');
ee239bfe
IZ
663}
664
665{
666 my ($a, $b);
667 symbolic1->vars($a, $b);
668 my $c = sqrt($a**2 + $b**2);
669 $a = 3; $b = 4;
fdb7e2a2 670 is((sprintf "%d", $c), '5');
ee239bfe 671 $a = 12; $b = 5;
fdb7e2a2 672 is((sprintf "%d", $c), '13');
ee239bfe
IZ
673}
674
675{
676 package two_face; # Scalars with separate string and
677 # numeric values.
678 sub new { my $p = shift; bless [@_], $p }
679 use overload '""' => \&str, '0+' => \&num, fallback => 1;
680 sub num {shift->[1]}
681 sub str {shift->[0]}
682}
683
684{
685 my $seven = new two_face ("vii", 7);
fdb7e2a2 686 is((sprintf "seven=$seven, seven=%d, eight=%d", $seven, $seven+1),
ee239bfe 687 'seven=vii, seven=7, eight=8');
fdb7e2a2 688 is(scalar ($seven =~ /i/), '1');
ee239bfe 689}
b3ac6de7 690
d0ecd44c
IZ
691{
692 package sorting;
693 use overload 'cmp' => \&comp;
694 sub new { my ($p, $v) = @_; bless \$v, $p }
695 sub comp { my ($x,$y) = @_; ($$x * 3 % 10) <=> ($$y * 3 % 10) or $$x cmp $$y }
696}
697{
698 my @arr = map sorting->new($_), 0..12;
699 my @sorted1 = sort @arr;
700 my @sorted2 = map $$_, @sorted1;
7bf00c86 701 is("@sorted2", '0 10 7 4 1 11 8 5 12 2 9 6 3');
d0ecd44c 702}
f5284f61
IZ
703{
704 package iterator;
705 use overload '<>' => \&iter;
706 sub new { my ($p, $v) = @_; bless \$v, $p }
707 sub iter { my ($x) = @_; return undef if $$x < 0; return $$x--; }
708}
72b16652 709
9426e1a5 710{
f5284f61
IZ
711 my $iter = iterator->new(5);
712 my $acc = '';
713 my $out;
714 $acc .= " $out" while $out = <${iter}>;
7bf00c86 715 is($acc, ' 5 4 3 2 1 0');
f5284f61 716 $iter = iterator->new(5);
7bf00c86 717 is(scalar <${iter}>, '5');
f5284f61 718 $acc = '';
b04ef359 719 $acc .= " $out" while $out = <$iter>;
7bf00c86 720 is($acc, ' 4 3 2 1 0');
f5284f61
IZ
721}
722{
723 package deref;
724 use overload '%{}' => \&hderef, '&{}' => \&cderef,
725 '*{}' => \&gderef, '${}' => \&sderef, '@{}' => \&aderef;
726 sub new { my ($p, $v) = @_; bless \$v, $p }
727 sub deref {
728 my ($self, $key) = (shift, shift);
729 my $class = ref $self;
730 bless $self, 'deref::dummy'; # Disable overloading of %{}
731 my $out = $self->{$key};
732 bless $self, $class; # Restore overloading
733 $out;
734 }
735 sub hderef {shift->deref('h')}
736 sub aderef {shift->deref('a')}
737 sub cderef {shift->deref('c')}
738 sub gderef {shift->deref('g')}
739 sub sderef {shift->deref('s')}
740}
741{
742 my $deref = bless { h => { foo => 5 , fake => 23 },
743 c => sub {return shift() + 34},
744 's' => \123,
745 a => [11..13],
746 g => \*srt,
747 }, 'deref';
748 # Hash:
749 my @cont = sort %$deref;
b0bf6df7 750 if ("\t" eq "\011") { # ASCII
7bf00c86 751 is("@cont", '23 5 fake foo');
f70c35af 752 }
b0bf6df7 753 else { # EBCDIC alpha-numeric sort order
7bf00c86 754 is("@cont", 'fake foo 23 5');
f70c35af 755 }
f5284f61 756 my @keys = sort keys %$deref;
7bf00c86 757 is("@keys", 'fake foo');
f5284f61 758 my @val = sort values %$deref;
7bf00c86
NC
759 is("@val", '23 5');
760 is($deref->{foo}, 5);
761 is(defined $deref->{bar}, '');
f5284f61
IZ
762 my $key;
763 @keys = ();
764 push @keys, $key while $key = each %$deref;
765 @keys = sort @keys;
7bf00c86
NC
766 is("@keys", 'fake foo');
767 is(exists $deref->{bar}, '');
768 is(exists $deref->{foo}, 1);
f5284f61 769 # Code:
7bf00c86
NC
770 is($deref->(5), 39);
771 is(&$deref(6), 40);
f5284f61 772 sub xxx_goto { goto &$deref }
7bf00c86 773 is(xxx_goto(7), 41);
f5284f61
IZ
774 my $srt = bless { c => sub {$b <=> $a}
775 }, 'deref';
776 *srt = \&$srt;
777 my @sorted = sort srt 11, 2, 5, 1, 22;
7bf00c86 778 is("@sorted", '22 11 5 2 1');
f5284f61 779 # Scalar
7bf00c86 780 is($$deref, 123);
c6e96bcb
GS
781 # Code
782 @sorted = sort $srt 11, 2, 5, 1, 22;
7bf00c86 783 is("@sorted", '22 11 5 2 1');
f5284f61 784 # Array
7bf00c86
NC
785 is("@$deref", '11 12 13');
786 is($#$deref, '2');
f5284f61 787 my $l = @$deref;
7bf00c86
NC
788 is($l, 3);
789 is($deref->[2], '13');
f5284f61 790 $l = pop @$deref;
7bf00c86 791 is($l, 13);
f5284f61 792 $l = 1;
7bf00c86 793 is($deref->[$l], '12');
f5284f61
IZ
794 # Repeated dereference
795 my $double = bless { h => $deref,
796 }, 'deref';
7bf00c86 797 is($double->{foo}, 5);
f5284f61
IZ
798}
799
800{
801 package two_refs;
802 use overload '%{}' => \&gethash, '@{}' => sub { ${shift()} };
803 sub new {
804 my $p = shift;
805 bless \ [@_], $p;
806 }
807 sub gethash {
808 my %h;
809 my $self = shift;
810 tie %h, ref $self, $self;
811 \%h;
812 }
813
814 sub TIEHASH { my $p = shift; bless \ shift, $p }
815 my %fields;
816 my $i = 0;
817 $fields{$_} = $i++ foreach qw{zero one two three};
818 sub STORE {
819 my $self = ${shift()};
820 my $key = $fields{shift()};
821 defined $key or die "Out of band access";
822 $$self->[$key] = shift;
823 }
824 sub FETCH {
825 my $self = ${shift()};
826 my $key = $fields{shift()};
827 defined $key or die "Out of band access";
828 $$self->[$key];
829 }
830}
831
832my $bar = new two_refs 3,4,5,6;
833$bar->[2] = 11;
7bf00c86 834is($bar->{two}, 11);
f5284f61 835$bar->{three} = 13;
7bf00c86 836is($bar->[3], 13);
f5284f61
IZ
837
838{
839 package two_refs_o;
840 @ISA = ('two_refs');
841}
842
843$bar = new two_refs_o 3,4,5,6;
844$bar->[2] = 11;
7bf00c86 845is($bar->{two}, 11);
f5284f61 846$bar->{three} = 13;
7bf00c86 847is($bar->[3], 13);
f5284f61
IZ
848
849{
850 package two_refs1;
851 use overload '%{}' => sub { ${shift()}->[1] },
852 '@{}' => sub { ${shift()}->[0] };
853 sub new {
854 my $p = shift;
855 my $a = [@_];
856 my %h;
857 tie %h, $p, $a;
858 bless \ [$a, \%h], $p;
859 }
860 sub gethash {
861 my %h;
862 my $self = shift;
863 tie %h, ref $self, $self;
864 \%h;
865 }
866
867 sub TIEHASH { my $p = shift; bless \ shift, $p }
868 my %fields;
869 my $i = 0;
870 $fields{$_} = $i++ foreach qw{zero one two three};
871 sub STORE {
872 my $a = ${shift()};
873 my $key = $fields{shift()};
874 defined $key or die "Out of band access";
875 $a->[$key] = shift;
876 }
877 sub FETCH {
878 my $a = ${shift()};
879 my $key = $fields{shift()};
880 defined $key or die "Out of band access";
881 $a->[$key];
882 }
883}
884
885$bar = new two_refs_o 3,4,5,6;
886$bar->[2] = 11;
7bf00c86 887is($bar->{two}, 11);
f5284f61 888$bar->{three} = 13;
7bf00c86 889is($bar->[3], 13);
f5284f61
IZ
890
891{
892 package two_refs1_o;
893 @ISA = ('two_refs1');
894}
895
896$bar = new two_refs1_o 3,4,5,6;
897$bar->[2] = 11;
7bf00c86 898is($bar->{two}, 11);
f5284f61 899$bar->{three} = 13;
7bf00c86 900is($bar->[3], 13);
f5284f61 901
fe7ac86a
IZ
902{
903 package B;
904 use overload bool => sub { ${+shift} };
905}
906
907my $aaa;
908{ my $bbbb = 0; $aaa = bless \$bbbb, B }
909
7bf00c86 910is !$aaa, 1;
fe7ac86a
IZ
911
912unless ($aaa) {
7bf00c86 913 pass();
fe7ac86a 914} else {
7bf00c86 915 fail();
fe7ac86a
IZ
916}
917
1426bbf4
MG
918# check that overload isn't done twice by join
919{ my $c = 0;
920 package Join;
921 use overload '""' => sub { $c++ };
922 my $x = join '', bless([]), 'pq', bless([]);
7bf00c86 923 main::is $x, '0pq1';
1426bbf4 924};
fe7ac86a 925
4498a751
PM
926# Test module-specific warning
927{
928 # check the Odd number of arguments for overload::constant warning
929 my $a = "" ;
0a911d86 930 local $SIG{__WARN__} = sub {$a = $_[0]} ;
4498a751 931 $x = eval ' overload::constant "integer" ; ' ;
7bf00c86 932 is($a, "");
4498a751
PM
933 use warnings 'overload' ;
934 $x = eval ' overload::constant "integer" ; ' ;
7bf00c86 935 like($a, qr/^Odd number of arguments for overload::constant at/);
4498a751
PM
936}
937
938{
1f874cb6 939 # check the '$_[0]' is not an overloadable type warning
4498a751 940 my $a = "" ;
0a911d86 941 local $SIG{__WARN__} = sub {$a = $_[0]} ;
4498a751 942 $x = eval ' overload::constant "fred" => sub {} ; ' ;
7bf00c86 943 is($a, "");
4498a751
PM
944 use warnings 'overload' ;
945 $x = eval ' overload::constant "fred" => sub {} ; ' ;
1f874cb6 946 like($a, qr/^'fred' is not an overloadable type at/);
4498a751
PM
947}
948
949{
1f874cb6 950 # check the '$_[1]' is not a code reference warning
4498a751 951 my $a = "" ;
0a911d86 952 local $SIG{__WARN__} = sub {$a = $_[0]} ;
4498a751 953 $x = eval ' overload::constant "integer" => 1; ' ;
7bf00c86 954 is($a, "");
4498a751
PM
955 use warnings 'overload' ;
956 $x = eval ' overload::constant "integer" => 1; ' ;
1f874cb6 957 like($a, qr/^'1' is not a code reference at/);
4498a751
PM
958}
959
78f67eb5 960{
d4a6f307
DM
961 # check the invalid argument warning [perl #74098]
962 my $a = "" ;
963 local $SIG{__WARN__} = sub {$a = $_[0]} ;
964 $x = eval ' use overload "~|_|~" => sub{} ' ;
bb4f579a 965 eval ' no overload "~|_|~" ' ;
d4a6f307
DM
966 is($a, "");
967 use warnings 'overload' ;
968 $x = eval ' use overload "~|_|~" => sub{} ' ;
969 like($a, qr/^overload arg '~\|_\|~' is invalid at \(eval \d+\) line /,
970 'invalid arg warning');
bb4f579a
DM
971 undef $a;
972 eval ' no overload "~|_|~" ' ;
973 like($a, qr/^overload arg '~\|_\|~' is invalid at \(eval \d+\) line /,
974 'invalid arg warning');
d4a6f307
DM
975}
976
977{
78f67eb5
JH
978 my $c = 0;
979 package ov_int1;
980 use overload '""' => sub { 3+shift->[0] },
981 '0+' => sub { 10+shift->[0] },
982 'int' => sub { 100+shift->[0] };
983 sub new {my $p = shift; bless [shift], $p}
984
985 package ov_int2;
986 use overload '""' => sub { 5+shift->[0] },
987 '0+' => sub { 30+shift->[0] },
988 'int' => sub { 'ov_int1'->new(1000+shift->[0]) };
989 sub new {my $p = shift; bless [shift], $p}
990
991 package noov_int;
992 use overload '""' => sub { 2+shift->[0] },
993 '0+' => sub { 9+shift->[0] };
994 sub new {my $p = shift; bless [shift], $p}
995
996 package main;
997
998 my $x = new noov_int 11;
999 my $int_x = int $x;
7bf00c86 1000 main::is("$int_x", 20);
78f67eb5
JH
1001 $x = new ov_int1 31;
1002 $int_x = int $x;
7bf00c86 1003 main::is("$int_x", 131);
78f67eb5
JH
1004 $x = new ov_int2 51;
1005 $int_x = int $x;
7bf00c86 1006 main::is("$int_x", 1054);
78f67eb5
JH
1007}
1008
b0bf6df7 1009# make sure that we don't infinitely recurse
1554e226
DC
1010{
1011 my $c = 0;
1012 package Recurse;
1013 use overload '""' => sub { shift },
1014 '0+' => sub { shift },
1015 'bool' => sub { shift },
1016 fallback => 1;
1017 my $x = bless([]);
7bf00c86
NC
1018 # For some reason beyond me these have to be oks rather than likes.
1019 main::ok("$x" =~ /Recurse=ARRAY/);
1020 main::ok($x);
1021 main::ok($x+0 =~ qr/Recurse=ARRAY/);
11e3e2e4 1022}
78f67eb5 1023
126fe723 1024# BugID 20010422.003 (#6872)
1dc13c17
SC
1025package Foo;
1026
1027use overload
1028 'bool' => sub { return !$_[0]->is_zero() || undef; }
1029;
1030
1031sub is_zero
1032 {
1033 my $self = shift;
1034 return $self->{var} == 0;
1035 }
1036
1037sub new
1038 {
1039 my $class = shift;
1040 my $self = {};
1041 $self->{var} = shift;
1042 bless $self,$class;
1043 }
1044
1045package main;
1046
1047use strict;
1048
1049my $r = Foo->new(8);
1050$r = Foo->new(0);
78f67eb5 1051
11e3e2e4 1052is(($r || 0), 0);
1554e226 1053
6050d10e
JP
1054package utf8_o;
1055
1056use overload
1057 '""' => sub { return $_[0]->{var}; }
1058 ;
1059
1060sub new
1061 {
1062 my $class = shift;
1063 my $self = {};
1064 $self->{var} = shift;
1065 bless $self,$class;
1066 }
1067
1068package main;
1069
1070
1071my $utfvar = new utf8_o 200.2.1;
11e3e2e4
NC
1072is("$utfvar", 200.2.1); # 223 - stringify
1073is("a$utfvar", "a".200.2.1); # 224 - overload via sv_2pv_flags
6050d10e 1074
446eaa42 1075# 225..227 -- more %{} tests. Hangs in 5.6.0, okay in later releases.
41cb1005
JH
1076# Basically this example implements strong encapsulation: if Hderef::import()
1077# were to eval the overload code in the caller's namespace, the privatisation
1078# would be quite transparent.
1079package Hderef;
1080use overload '%{}' => sub { (caller(0))[0] eq 'Foo' ? $_[0] : die "zap" };
1081package Foo;
1082@Foo::ISA = 'Hderef';
1083sub new { bless {}, shift }
1084sub xet { @_ == 2 ? $_[0]->{$_[1]} :
1085 @_ == 3 ? ($_[0]->{$_[1]} = $_[2]) : undef }
1086package main;
1087my $a = Foo->new;
1088$a->xet('b', 42);
11e3e2e4
NC
1089is ($a->xet('b'), 42);
1090ok (!defined eval { $a->{b} });
1091like ($@, qr/zap/);
41cb1005 1092
29ddfe35
RD
1093{
1094 package t229;
1095 use overload '=' => sub { 42 },
1096 '++' => sub { my $x = ${$_[0]}; $_[0] };
1097 sub new { my $x = 42; bless \$x }
1098
1099 my $warn;
1100 {
1101 local $SIG{__WARN__} = sub { $warn++ };
1102 my $x = t229->new;
1103 my $y = $x;
1104 eval { $y++ };
1105 }
11e3e2e4 1106 main::ok (!$warn);
61f33854
RGS
1107}
1108
1109{
1110 my ($int, $out1, $out2);
1111 {
1112 BEGIN { $int = 0; overload::constant 'integer' => sub {$int++; 17}; }
1113 $out1 = 0;
1114 $out2 = 1;
1115 }
11e3e2e4
NC
1116 is($int, 2, "#24313"); # 230
1117 is($out1, 17, "#24313"); # 231
1118 is($out2, 17, "#24313"); # 232
29ddfe35
RD
1119}
1120
0bdaccee 1121{
d411a6a9 1122 package perl31793;
1b1d102f
RD
1123 use overload cmp => sub { 0 };
1124 package perl31793_fb;
76c43448 1125 use overload cmp => sub { 0 }, fallback => 1;
d411a6a9
RD
1126 package main;
1127 my $o = bless [], 'perl31793';
1b1d102f 1128 my $of = bless [], 'perl31793_fb';
d411a6a9 1129 my $no = bless [], 'no_overload';
11e3e2e4
NC
1130 like(overload::StrVal(\"scalar"), qr/^SCALAR\(0x[0-9a-f]+\)$/);
1131 like(overload::StrVal([]), qr/^ARRAY\(0x[0-9a-f]+\)$/);
1132 like(overload::StrVal({}), qr/^HASH\(0x[0-9a-f]+\)$/);
1133 like(overload::StrVal(sub{1}), qr/^CODE\(0x[0-9a-f]+\)$/);
1134 like(overload::StrVal(\*GLOB), qr/^GLOB\(0x[0-9a-f]+\)$/);
1135 like(overload::StrVal(\$o), qr/^REF\(0x[0-9a-f]+\)$/);
0fc92fc6 1136 like(overload::StrVal(qr/a/), qr/^Regexp=REGEXP\(0x[0-9a-f]+\)$/);
11e3e2e4
NC
1137 like(overload::StrVal($o), qr/^perl31793=ARRAY\(0x[0-9a-f]+\)$/);
1138 like(overload::StrVal($of), qr/^perl31793_fb=ARRAY\(0x[0-9a-f]+\)$/);
1139 like(overload::StrVal($no), qr/^no_overload=ARRAY\(0x[0-9a-f]+\)$/);
d411a6a9
RD
1140}
1141
bb4f579a
DM
1142{
1143 package Numify;
1144 use overload (qw(0+ numify fallback 1));
1145
1146 sub new {
1147 my $val = $_[1];
1148 bless \$val, $_[0];
1149 }
1150
1151 sub numify { ${$_[0]} }
1152}
1153
1154# These all check that overloaded values, rather than reference addresses,
1155# are what are getting tested.
0bdaccee
NC
1156my ($two, $one, $un, $deux) = map {new Numify $_} 2, 1, 1, 2;
1157my ($ein, $zwei) = (1, 2);
1158
1159my %map = (one => 1, un => 1, ein => 1, deux => 2, two => 2, zwei => 2);
1160foreach my $op (qw(<=> == != < <= > >=)) {
1161 foreach my $l (keys %map) {
1162 foreach my $r (keys %map) {
1163 my $ocode = "\$$l $op \$$r";
1164 my $rcode = "$map{$l} $op $map{$r}";
1165
1166 my $got = eval $ocode;
1167 die if $@;
1168 my $expect = eval $rcode;
1169 die if $@;
11e3e2e4 1170 is ($got, $expect, $ocode) or print "# $rcode\n";
0bdaccee
NC
1171 }
1172 }
1173}
131b3ad0
DM
1174{
1175 # check that overloading works in regexes
1176 {
1177 package Foo493;
1178 use overload
1179 '""' => sub { "^$_[0][0]\$" },
1180 '.' => sub {
1181 bless [
1182 $_[2]
1183 ? (ref $_[1] ? $_[1][0] : $_[1]) . ':' .$_[0][0]
1184 : $_[0][0] . ':' . (ref $_[1] ? $_[1][0] : $_[1])
1185 ], 'Foo493'
1186 };
1187 }
1188
1189 my $a = bless [ "a" ], 'Foo493';
11e3e2e4
NC
1190 like('a', qr/$a/);
1191 like('x:a', qr/x$a/);
1192 like('x:a:=', qr/x$a=$/);
1193 like('x:a:a:=', qr/x$a$a=$/);
131b3ad0
DM
1194
1195}
1196
705c898c 1197{
d4b87e75
BM
1198 {
1199 package QRonly;
1200 use overload qr => sub { qr/x/ }, fallback => 1;
1201 }
1202 {
1203 my $x = bless [], "QRonly";
1204
1205 # like tries to be too clever, and decides that $x-stringified
1206 # doesn't look like a regex
1207 ok("x" =~ $x, "qr-only matches");
e4eea578 1208 ok("y" !~ $x, "qr-only doesn't match what it shouldn't");
9f141731
DM
1209 ok("x" =~ /^(??{$x})$/, "qr-only with ?? matches");
1210 ok("y" !~ /^(??{$x})$/, "qr-only with ?? doesn't match what it shouldn't");
d4b87e75 1211 ok("xx" =~ /x$x/, "qr-only matches with concat");
e4eea578 1212 like("$x", qr/^QRonly=ARRAY/, "qr-only doesn't have string overload");
d4b87e75
BM
1213
1214 my $qr = bless qr/y/, "QRonly";
1215 ok("x" =~ $qr, "qr with qr-overload uses overload");
e4eea578 1216 ok("y" !~ $qr, "qr with qr-overload uses overload");
497d0a96
DM
1217 ok("x" =~ /^(??{$qr})$/, "qr with qr-overload with ?? uses overload");
1218 ok("y" !~ /^(??{$qr})$/, "qr with qr-overload with ?? uses overload");
d4b87e75
BM
1219 is("$qr", "".qr/y/, "qr with qr-overload stringify");
1220
1221 my $rx = $$qr;
1222 ok("y" =~ $rx, "bare rx with qr-overload doesn't overload match");
e4eea578 1223 ok("x" !~ $rx, "bare rx with qr-overload doesn't overload match");
9f141731
DM
1224 ok("y" =~ /^(??{$rx})$/, "bare rx with qr-overload with ?? doesn't overload match");
1225 ok("x" !~ /^(??{$rx})$/, "bare rx with qr-overload with ?? doesn't overload match");
d4b87e75
BM
1226 is("$rx", "".qr/y/, "bare rx with qr-overload stringify");
1227 }
1228 {
1229 package QRandSTR;
1230 use overload qr => sub { qr/x/ }, q/""/ => sub { "y" };
1231 }
1232 {
1233 my $x = bless [], "QRandSTR";
1234 ok("x" =~ $x, "qr+str uses qr for match");
e4eea578 1235 ok("y" !~ $x, "qr+str uses qr for match");
d4b87e75
BM
1236 ok("xx" =~ /x$x/, "qr+str uses qr for match with concat");
1237 is("$x", "y", "qr+str uses str for stringify");
1238
1239 my $qr = bless qr/z/, "QRandSTR";
1240 is("$qr", "y", "qr with qr+str uses str for stringify");
1241 ok("xx" =~ /x$x/, "qr with qr+str uses qr for match");
1242
1243 my $rx = $$qr;
1244 ok("z" =~ $rx, "bare rx with qr+str doesn't overload match");
1245 is("$rx", "".qr/z/, "bare rx with qr+str doesn't overload stringify");
1246 }
1247 {
1248 package QRany;
1249 use overload qr => sub { $_[0]->(@_) };
1250
1251 package QRself;
1252 use overload qr => sub { $_[0] };
1253 }
1254 {
1255 my $rx = bless sub { ${ qr/x/ } }, "QRany";
e4eea578
RGS
1256 ok("x" =~ $rx, "qr overload accepts a bare rx");
1257 ok("y" !~ $rx, "qr overload accepts a bare rx");
d4b87e75
BM
1258
1259 my $str = bless sub { "x" }, "QRany";
1260 ok(!eval { "x" =~ $str }, "qr overload doesn't accept a string");
e4eea578 1261 like($@, qr/^Overloaded qr did not return a REGEXP/, "correct error");
d4b87e75
BM
1262
1263 my $oqr = bless qr/z/, "QRandSTR";
1264 my $oqro = bless sub { $oqr }, "QRany";
e4eea578 1265 ok("z" =~ $oqro, "qr overload doesn't recurse");
d4b87e75
BM
1266
1267 my $qrs = bless qr/z/, "QRself";
e4eea578 1268 ok("z" =~ $qrs, "qr overload can return self");
d4b87e75
BM
1269 }
1270 {
1271 package STRonly;
1272 use overload q/""/ => sub { "x" };
1273
1274 package STRonlyFB;
1275 use overload q/""/ => sub { "x" }, fallback => 1;
1276 }
1277 {
1278 my $fb = bless [], "STRonlyFB";
e4eea578
RGS
1279 ok("x" =~ $fb, "qr falls back to \"\"");
1280 ok("y" !~ $fb, "qr falls back to \"\"");
d4b87e75
BM
1281
1282 my $nofb = bless [], "STRonly";
e4eea578
RGS
1283 ok("x" =~ $nofb, "qr falls back even without fallback");
1284 ok("y" !~ $nofb, "qr falls back even without fallback");
d4b87e75
BM
1285 }
1286}
1287
1288{
705c898c
RH
1289 my $twenty_three = 23;
1290 # Check that constant overloading propagates into evals
1291 BEGIN { overload::constant integer => sub { 23 } }
11e3e2e4 1292 is(eval "17", $twenty_three);
705c898c 1293}
dd2eae66
NC
1294
1295{
9a0a8507
FC
1296 # Check readonliness of constants, whether shared hash key
1297 # scalars or no (brought up in bug #109744)
c74b32e1
FC
1298 BEGIN { overload::constant integer => sub { "main" }; }
1299 eval { ${\5} = 'whatever' };
1300 like $@, qr/^Modification of a read-only value attempted at /,
1301 'constant overloading makes read-only constants';
1302 BEGIN { overload::constant integer => sub { __PACKAGE__ }; }
1303 eval { ${\5} = 'whatever' };
9a0a8507
FC
1304 like $@, qr/^Modification of a read-only value attempted at /,
1305 '... even with shared hash key scalars';
c74b32e1
FC
1306}
1307
1308{
dd2eae66
NC
1309 package Sklorsh;
1310 use overload
1311 bool => sub { shift->is_cool };
1312
1313 sub is_cool {
1314 $_[0]->{name} eq 'cool';
1315 }
1316
1317 sub delete {
1318 undef %{$_[0]};
1319 bless $_[0], 'Brap';
1320 return 1;
1321 }
1322
1323 sub delete_with_self {
1324 my $self = shift;
1325 undef %$self;
1326 bless $self, 'Brap';
1327 return 1;
1328 }
1329
1330 package Brap;
1331
1332 1;
1333
1334 package main;
1335
1336 my $obj;
1337 $obj = bless {name => 'cool'}, 'Sklorsh';
1338 $obj->delete;
b0bf6df7 1339 ok(eval {if ($obj) {1}; 1}, $@ || 'reblessed into nonexistent namespace');
dd2eae66
NC
1340
1341 $obj = bless {name => 'cool'}, 'Sklorsh';
1342 $obj->delete_with_self;
1343 ok (eval {if ($obj) {1}; 1}, $@);
1344
1345 my $a = $b = {name => 'hot'};
1346 bless $b, 'Sklorsh';
1347 is(ref $a, 'Sklorsh');
1348 is(ref $b, 'Sklorsh');
1349 ok(!$b, "Expect overloaded boolean");
1350 ok(!$a, "Expect overloaded boolean");
1351}
edbe35ea
VP
1352
1353{
1354 package Flrbbbbb;
1355 use overload
1356 bool => sub { shift->{truth} eq 'yes' },
1357 '0+' => sub { shift->{truth} eq 'yes' ? '1' : '0' },
1358 '!' => sub { shift->{truth} eq 'no' },
1359 fallback => 1;
1360
1361 sub new { my $class = shift; bless { truth => shift }, $class }
1362
1363 package main;
1364
1365 my $yes = Flrbbbbb->new('yes');
1366 my $x;
1367 $x = 1 if $yes; is($x, 1);
1368 $x = 2 unless $yes; is($x, 1);
1369 $x = 3 if !$yes; is($x, 1);
1370 $x = 4 unless !$yes; is($x, 4);
1371
1372 my $no = Flrbbbbb->new('no');
1373 $x = 0;
1374 $x = 1 if $no; is($x, 0);
1375 $x = 2 unless $no; is($x, 2);
1376 $x = 3 if !$no; is($x, 3);
1377 $x = 4 unless !$no; is($x, 3);
1378
1379 $x = 0;
1380 $x = 1 if !$no && $yes; is($x, 1);
1381 $x = 2 unless !$no && $yes; is($x, 1);
1382 $x = 3 if $no || !$yes; is($x, 1);
1383 $x = 4 unless $no || !$yes; is($x, 4);
1384
1385 $x = 0;
1386 $x = 1 if !$no || !$yes; is($x, 1);
1387 $x = 2 unless !$no || !$yes; is($x, 1);
1388 $x = 3 if !$no && !$yes; is($x, 1);
1389 $x = 4 unless !$no && !$yes; is($x, 4);
1390}
1391
ea940d6b 1392{
2372186a
NC
1393 use Scalar::Util 'weaken';
1394
1395 package Shklitza;
1396 use overload '""' => sub {"CLiK KLAK"};
1397
1398 package Ksshfwoom;
2372186a
NC
1399
1400 package main;
1401
1402 my ($obj, $ref);
1403 $obj = bless do {my $a; \$a}, 'Shklitza';
1404 $ref = $obj;
1405
ea940d6b
CBW
1406 is ("$obj", "CLiK KLAK");
1407 is ("$ref", "CLiK KLAK");
2372186a
NC
1408
1409 weaken $ref;
ea940d6b 1410 is ("$ref", "CLiK KLAK");
2372186a
NC
1411
1412 bless $obj, 'Ksshfwoom';
1413
cd75d542
NC
1414 like ($obj, qr/^Ksshfwoom=/);
1415 like ($ref, qr/^Ksshfwoom=/);
2372186a
NC
1416
1417 undef $obj;
1418 is ($ref, undef);
1419}
6dd85743
AF
1420
1421{
1422 package bit;
1423 # bit operations have overloadable assignment variants too
1424
1425 sub new { bless \$_[1], $_[0] }
1426
1427 use overload
1428 "&=" => sub { bit->new($_[0]->val . ' & ' . $_[1]->val) },
1429 "^=" => sub { bit->new($_[0]->val . ' ^ ' . $_[1]->val) },
1430 "|" => sub { bit->new($_[0]->val . ' | ' . $_[1]->val) }, # |= by fallback
1431 ;
1432
1433 sub val { ${$_[0]} }
1434
1435 package main;
1436
1437 my $a = bit->new(my $va = 'a');
1438 my $b = bit->new(my $vb = 'b');
1439
1440 $a &= $b;
1441 is($a->val, 'a & b', "overloaded &= works");
1442
1443 my $c = bit->new(my $vc = 'c');
1444
1445 $b ^= $c;
1446 is($b->val, 'b ^ c', "overloaded ^= works");
1447
1448 my $d = bit->new(my $vd = 'd');
1449
1450 $c |= $d;
1451 is($c->val, 'c | d', "overloaded |= (by fallback) works");
1452}
d11ee47c
RD
1453
1454{
2ab54efd 1455 # comparison operators with nomethod (bug 41546)
d11ee47c
RD
1456 my $warning = "";
1457 my $method;
1458
1459 package nomethod_false;
1460 use overload nomethod => sub { $method = 'nomethod'; 0 };
1461
1462 package nomethod_true;
1463 use overload nomethod => sub { $method= 'nomethod'; 'true' };
1464
1465 package main;
1466 local $^W = 1;
1467 local $SIG{__WARN__} = sub { $warning = $_[0] };
1468
1469 my $f = bless [], 'nomethod_false';
1470 ($warning, $method) = ("", "");
1471 is($f eq 'whatever', 0, 'nomethod makes eq return 0');
1472 is($method, 'nomethod');
1473
1474 my $t = bless [], 'nomethod_true';
1475 ($warning, $method) = ("", "");
1476 is($t eq 'whatever', 'true', 'nomethod makes eq return "true"');
1477 is($method, 'nomethod');
1478 is($warning, "", 'nomethod eq need not return number');
1479
1480 eval q{
1481 package nomethod_false;
1482 use overload cmp => sub { $method = 'cmp'; 0 };
1483 };
1484 $f = bless [], 'nomethod_false';
1485 ($warning, $method) = ("", "");
1486 ok($f eq 'whatever', 'eq falls back to cmp (nomethod not called)');
1487 is($method, 'cmp');
1488
1489 eval q{
1490 package nomethod_true;
1491 use overload cmp => sub { $method = 'cmp'; 'true' };
1492 };
1493 $t = bless [], 'nomethod_true';
1494 ($warning, $method) = ("", "");
1495 ok($t eq 'whatever', 'eq falls back to cmp (nomethod not called)');
1496 is($method, 'cmp');
1497 like($warning, qr/isn't numeric/, 'cmp should return number');
1498
1499}
2c615c57
NC
1500
1501{
2ab54efd
MB
1502 # nomethod called for '!' after attempted fallback
1503 my $nomethod_called = 0;
1504
1505 package nomethod_not;
1506 use overload nomethod => sub { $nomethod_called = 'yes'; };
1507
1508 package main;
1509 my $o = bless [], 'nomethod_not';
1510 my $res = ! $o;
1511
1512 is($nomethod_called, 'yes', "nomethod() is called for '!'");
1513 is($res, 'yes', "nomethod(..., '!') return value propagates");
1514}
1515
1516{
2c615c57 1517 # Subtle bug pre 5.10, as a side effect of the overloading flag being
b0bf6df7 1518 # stored on the reference rather than the referent. Despite the fact that
2c615c57 1519 # objects can only be accessed via references (even internally), the
b0bf6df7 1520 # referent actually knows that it's blessed, not the references. So taking
2c615c57
NC
1521 # a new, unrelated, reference to it gives an object. However, the
1522 # overloading-or-not flag was on the reference prior to 5.10, and taking
1523 # a new reference didn't (use to) copy it.
1524
1525 package kayo;
1526
1527 use overload '""' => sub {${$_[0]}};
1528
1529 sub Pie {
1530 return "$_[0], $_[1]";
1531 }
1532
1533 package main;
1534
1535 my $class = 'kayo';
1536 my $string = 'bam';
1537 my $crunch_eth = bless \$string, $class;
1538
1539 is("$crunch_eth", $string);
1540 is ($crunch_eth->Pie("Meat"), "$string, Meat");
1541
1542 my $wham_eth = \$string;
1543
1544 is("$wham_eth", $string,
1545 'This reference did not have overloading in 5.8.8 and earlier');
1546 is ($crunch_eth->Pie("Apple"), "$string, Apple");
1547
1548 my $class = ref $wham_eth;
1549 $class =~ s/=.*//;
1550
1551 # Bless it back into its own class!
1552 bless $wham_eth, $class;
1553
1554 is("$wham_eth", $string);
1555 is ($crunch_eth->Pie("Blackbird"), "$string, Blackbird");
1556}
c781a409
RD
1557
1558{
1559 package numify_int;
1560 use overload "0+" => sub { $_[0][0] += 1; 42 };
1561 package numify_self;
1562 use overload "0+" => sub { $_[0][0]++; $_[0] };
1563 package numify_other;
1564 use overload "0+" => sub { $_[0][0]++; $_[0][1] = bless [], 'numify_int' };
e28bb1d5 1565 package numify_by_fallback;
800401ee 1566 use overload fallback => 1;
c781a409
RD
1567
1568 package main;
1569 my $o = bless [], 'numify_int';
1570 is(int($o), 42, 'numifies to integer');
1571 is($o->[0], 1, 'int() numifies only once');
1572
1573 my $aref = [];
93521010 1574 my $num_val = int($aref);
c781a409
RD
1575 my $r = bless $aref, 'numify_self';
1576 is(int($r), $num_val, 'numifies to self');
1577 is($r->[0], 1, 'int() numifies once when returning self');
1578
1579 my $s = bless [], 'numify_other';
1580 is(int($s), 42, 'numifies to numification of other object');
1581 is($s->[0], 1, 'int() numifies once when returning other object');
1582 is($s->[1][0], 1, 'returned object numifies too');
e28bb1d5
RD
1583
1584 my $m = bless $aref, 'numify_by_fallback';
1585 is(int($m), $num_val, 'numifies to usual reference value');
800401ee
JH
1586 is(abs($m), $num_val, 'numifies to usual reference value');
1587 is(-$m, -$num_val, 'numifies to usual reference value');
1588 is(0+$m, $num_val, 'numifies to usual reference value');
1589 is($m+0, $num_val, 'numifies to usual reference value');
1590 is($m+$m, 2*$num_val, 'numifies to usual reference value');
1591 is(0-$m, -$num_val, 'numifies to usual reference value');
1592 is(1*$m, $num_val, 'numifies to usual reference value');
9fa8ecf2 1593 is(int($m/1), $num_val, 'numifies to usual reference value');
800401ee
JH
1594 is($m%100, $num_val%100, 'numifies to usual reference value');
1595 is($m**1, $num_val, 'numifies to usual reference value');
1596
1597 is(abs($aref), $num_val, 'abs() of ref');
1598 is(-$aref, -$num_val, 'negative of ref');
1599 is(0+$aref, $num_val, 'ref addition');
1600 is($aref+0, $num_val, 'ref addition');
1601 is($aref+$aref, 2*$num_val, 'ref addition');
1602 is(0-$aref, -$num_val, 'subtraction of ref');
1603 is(1*$aref, $num_val, 'multiplicaton of ref');
9fa8ecf2 1604 is(int($aref/1), $num_val, 'division of ref');
800401ee
JH
1605 is($aref%100, $num_val%100, 'modulo of ref');
1606 is($aref**1, $num_val, 'exponentiation of ref');
c781a409 1607}
800401ee 1608
49c95d58
RD
1609{
1610 package CopyConstructorFallback;
1611 use overload
1612 '++' => sub { "$_[0]"; $_[0] },
1613 fallback => 1;
1614 sub new { bless {} => shift }
1615
1616 package main;
1617
1618 my $o = CopyConstructorFallback->new;
1619 my $x = $o++; # would segfault
1620 my $y = ++$o;
1621 is($x, $o, "copy constructor falls back to assignment (postinc)");
1622 is($y, $o, "copy constructor falls back to assignment (preinc)");
1623}
1624
6f1401dc
DM
1625# only scalar 'x' should currently overload
1626
1627{
1628 package REPEAT;
1629
1630 my ($x,$n, $nm);
1631
1632 use overload
1633 'x' => sub { $x++; 1 },
1634 '0+' => sub { $n++; 1 },
1635 'nomethod' => sub { $nm++; 1 },
1636 'fallback' => 0,
1637 ;
1638
1639 my $s = bless {};
1640
1641 package main;
1642
1643 my @a;
1644 my $count = 3;
1645
1646 ($x,$n,$nm) = (0,0,0);
1647 @a = ((1,2,$s) x $count);
1648 is("$x-$n-$nm", "0-0-0", 'repeat 1');
1649
1650 ($x,$n,$nm) = (0,0,0);
1651 @a = ((1,$s,3) x $count);
1652 is("$x-$n-$nm", "0-0-0", 'repeat 2');
1653
1654 ($x,$n,$nm) = (0,0,0);
1655 @a = ((1,2,3) x $s);
1656 is("$x-$n-$nm", "0-1-0", 'repeat 3');
1657}
1658
1659
1660
1661# RT #57012: magic items need to have mg_get() called before testing for
1662# overload. Lack of this means that overloaded values returned by eg a
1663# tied array didn't call overload methods.
1664# We test here both a tied array and scalar, since the implementation of
1665# tied arrays (and hashes) is such that in rvalue context, mg_get is
1666# called prior to executing the op, while it isn't for a tied scalar.
a02ec77a
DM
1667# We also check that return values are correctly tainted.
1668# We try against two overload packages; one has all expected methods, the
1669# other uses only fallback methods.
6f1401dc
DM
1670
1671{
1672
a02ec77a
DM
1673 # @tests holds a list of test cases. Each elem is an array ref with
1674 # the following entries:
1675 #
1676 # * the value that the overload method should return
1677 #
1678 # * the expression to be evaled. %s is replaced with the
1679 # variable being tested ($ta[0], $ts, or $plain)
1680 #
1681 # * a string listing what functions we expect to be called.
1682 # Each method appends its name in parentheses, so "(=)(+)" means
1683 # we expect the copy constructor and then the add method to be
1684 # called.
1685 #
1686 # * like above, but what should be called for the fallback-only test
1687 # (in this case, nomethod() identifies itself as "(NM:*)" where *
1688 # is the op). If this value is undef, fallback tests are skipped.
1689 #
1690 # * An array ref of expected counts of calls to FETCH/STORE.
1691 # The first three values are:
1692 # 1. the expected number of FETCHs for a tied array
1693 # 2. the expected number of FETCHs for a tied scalar
1694 # 3. the expected number of STOREs
1695 # If there are a further three elements present, then
1696 # these represent the expected counts for the fallback
1697 # version of the tests. If absent, they are assumed to
1698 # be the same as for the full method test
1699 #
1700 # * Under the taint version of the tests, whether we expect
1701 # the result to be tainted (for example comparison ops
1702 # like '==' don't return a tainted value, even if their
1703 # args are.
1704 my @tests;
1705
6f1401dc
DM
1706 my %subs;
1707 my $funcs;
1708 my $use_int;
1709
1710 BEGIN {
1711 # A note on what methods to expect to be called, and
1712 # how many times FETCH/STORE is called:
1713 #
1714 # Mutating ops (+=, ++ etc) trigger a copy ('='), since
7f1e438c 1715 # the code can't distinguish between something that's been copied:
6f1401dc
DM
1716 # $a = foo->new(0); $b = $a; refcnt($$b) == 2
1717 # and overloaded objects stored in ties which will have extra
1718 # refcounts due to the tied_obj magic and entries on the tmps
1719 # stack when returning from FETCH etc. So we always copy.
1720
1721 # This accounts for a '=', and an extra STORE.
1722 # We also have a FETCH returning the final value from the eval,
1723 # plus a FETCH in the overload subs themselves: ($_[0][0])
7f1e438c 1724 # triggers one. However, tied aggregates have a mechanism to prevent
6f1401dc
DM
1725 # multiple fetches between STOREs, which means that the tied
1726 # hash skips doing a FETCH during '='.
1727
a02ec77a
DM
1728 for (qw(+ - * / % ** << >> & | ^)) {
1729 my $op = $_;
1730 $op = '%%' if $op eq '%';
1731 my $e = "%s $op= 3";
6f1401dc
DM
1732 $subs{"$_="} = $e;
1733 # ARRAY FETCH: initial, sub+=, eval-return,
1734 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1735 # STORE: copy, mutator
a02ec77a
DM
1736 push @tests, [ 18, $e, "(=)($_=)", "(=)(NM:$_=)", [ 3, 4, 2 ], 1 ];
1737
1738 $subs{$_} =
1739 "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }";
6f1401dc
DM
1740 # ARRAY FETCH: initial
1741 # SCALAR FETCH: initial eval-return,
a02ec77a
DM
1742 push @tests, [ 18, "%s $op 3", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
1743 push @tests, [ 18, "3 $op %s", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc 1744 }
a02ec77a
DM
1745
1746 # these use string fallback rather than nomethod
1747 for (qw(x .)) {
1748 my $op = $_;
1749 my $e = "%s $op= 3";
1750 $subs{"$_="} = $e;
1751 # For normal case:
1752 # ARRAY FETCH: initial, sub+=, eval-return,
1753 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1754 # STORE: copy, mutator
1755 # for fallback, we just stringify, so eval-return and copy skipped
c5aa2872
DM
1756
1757 push @tests, [ 18, $e, "(=)($_=)", '("")',
1758 [ 3, 4, 2, 2, 3, 1 ], 1 ];
a02ec77a
DM
1759
1760 $subs{$_} =
1761 "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }";
1762 # ARRAY FETCH: initial
1763 # SCALAR FETCH: initial eval-return,
3bc4ee4c
DM
1764 # with fallback, we just stringify, so eval-return skipped,
1765 # but an extra FETCH happens in sub"", except for 'x',
1766 # which passes a copy of the RV to sub"", avoiding the
1767 # second FETCH
1768
1769 push @tests, [ 18, "%s $op 3", "($_)", '("")',
1770 [ 1, 2, 0, 1, ($_ eq '.' ? 2 : 1), 0 ], 1 ];
1771 next if $_ eq 'x'; # repeat only overloads on LHS
1772 push @tests, [ 18, "3 $op %s", "($_)", '("")',
1773 [ 1, 2, 0, 1, 2, 0 ], 1 ];
a02ec77a
DM
1774 }
1775
6f1401dc
DM
1776 for (qw(++ --)) {
1777 my $pre = "$_%s";
1778 my $post = "%s$_";
1779 $subs{$_} = $pre;
a02ec77a 1780 push @tests,
6f1401dc
DM
1781 # ARRAY FETCH: initial, sub+=, eval-return,
1782 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1783 # STORE: copy, mutator
a02ec77a 1784 [ 18, $pre, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 3, 4, 2 ], 1 ],
6f1401dc
DM
1785 # ARRAY FETCH: initial, sub+=
1786 # SCALAR FETCH: initial, sub=, sub+=
1787 # STORE: copy, mutator
a02ec77a 1788 [ 18, $post, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 2, 3, 2 ], 1 ];
6f1401dc
DM
1789 }
1790
1791 # For the non-mutator ops, we have a initial FETCH,
1792 # an extra FETCH within the sub itself for the scalar option,
1793 # and no STOREs
1794
a02ec77a 1795 for (qw(< <= > >= == != lt le gt ge eq ne)) {
6f1401dc
DM
1796 my $e = "%s $_ 3";
1797 $subs{$_} = $e;
a02ec77a
DM
1798 push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 0 ];
1799 }
1800 for (qw(<=> cmp)) {
1801 my $e = "%s $_ 3";
1802 $subs{$_} = $e;
1803 push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc
DM
1804 }
1805 for (qw(atan2)) {
1806 my $e = "$_ %s, 3";
1807 $subs{$_} = $e;
a02ec77a 1808 push @tests, [ 18, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc 1809 }
a02ec77a 1810 for (qw(cos sin exp abs log sqrt int ~)) {
6f1401dc
DM
1811 my $e = "$_(%s)";
1812 $subs{$_} = $e;
a02ec77a
DM
1813 push @tests, [ 1.23, $e, "($_)",
1814 ($_ eq 'int' ? '(0+)' : "(NM:$_)") , [ 1, 2, 0 ], 1 ];
1815 }
1816 for (qw(!)) {
1817 my $e = "$_(%s)";
1818 $subs{$_} = $e;
1819 push @tests, [ 1.23, $e, "($_)", '(0+)', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1820 }
1821 for (qw(-)) {
1822 my $e = "$_(%s)";
1823 $subs{neg} = $e;
a02ec77a 1824 push @tests, [ 18, $e, '(neg)', '(NM:neg)', [ 1, 2, 0 ], 1 ];
6f1401dc
DM
1825 }
1826 my $e = '(%s) ? 1 : 0';
1827 $subs{bool} = $e;
a02ec77a 1828 push @tests, [ 18, $e, '(bool)', '(0+)', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1829
1830 # note: this is testing unary qr, not binary =~
a02ec77a 1831 $subs{qr} = '(qr/%s/)';
f3ec07c7 1832 push @tests, [ "abc", '"abc" =~ (%s)', '(qr)', '("")', [ 1, 2, 0 ], 0 ];
540576b3
FC
1833 push @tests, [ chr 256, 'chr(256) =~ (%s)', '(qr)', '("")',
1834 [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1835
1836 $e = '"abc" ~~ (%s)';
1837 $subs{'~~'} = $e;
a02ec77a 1838 push @tests, [ "abc", $e, '(~~)', '(NM:~~)', [ 1, 1, 0 ], 0 ];
6f1401dc
DM
1839
1840 $subs{'-X'} = 'do { my $f = (%s);'
1841 . '$_[1] eq "r" ? (-r ($f)) :'
1842 . '$_[1] eq "e" ? (-e ($f)) :'
1843 . '$_[1] eq "f" ? (-f ($f)) :'
1844 . '$_[1] eq "l" ? (-l ($f)) :'
1845 . '$_[1] eq "t" ? (-t ($f)) :'
1846 . '$_[1] eq "T" ? (-T ($f)) : 0;}';
7f1e438c 1847 # Note - we don't care what these file tests return, as
6f1401dc
DM
1848 # long as the tied and untied versions return the same value.
1849 # The flags below are chosen to test all uses of tryAMAGICftest_MG
1850 for (qw(r e f l t T)) {
40c852de 1851 push @tests, [ 'TEST', "-$_ (%s)", '(-X)', '("")', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1852 }
1853
1854 $subs{'${}'} = '%s';
a02ec77a 1855 push @tests, [ do {my $s=99; \$s}, '${%s}', '(${})', undef, [ 1, 1, 0 ], 0 ];
6f1401dc
DM
1856
1857 # we skip testing '@{}' here because too much of this test
a02ec77a 1858 # framework involves array dereferences!
6f1401dc
DM
1859
1860 $subs{'%{}'} = '%s';
a02ec77a 1861 push @tests, [ {qw(a 1 b 2 c 3)}, 'join "", sort keys %%{%s}',
9026059d 1862 '(%{})', undef, [ 1, 1, 0 ], 0 ];
6f1401dc
DM
1863
1864 $subs{'&{}'} = '%s';
a02ec77a
DM
1865 push @tests, [ sub {99}, 'do {&{%s} for 1,2}',
1866 '(&{})(&{})', undef, [ 2, 2, 0 ], 0 ];
6f1401dc
DM
1867
1868 our $RT57012A = 88;
1869 our $RT57012B;
1870 $subs{'*{}'} = '%s';
a02ec77a
DM
1871 push @tests, [ \*RT57012A, '*RT57012B = *{%s}; our $RT57012B',
1872 '(*{})', undef, [ 1, 1, 0 ], 0 ];
6f1401dc 1873
9426e1a5
DM
1874 my $iter_text = ("some random text\n" x 100) . $^X;
1875 open my $iter_fh, '<', \$iter_text
1876 or die "open of \$iter_text gave ($!)\n";
1877 $subs{'<>'} = '<$iter_fh>';
1878 push @tests, [ $iter_fh, '<%s>', '(<>)', undef, [ 1, 1, 0 ], 1 ];
bb4f579a
DM
1879 push @tests, [ $iter_fh,
1880 'local *CORE::GLOBAL::glob = sub {}; eval q|<%s>|',
1881 '(<>)', undef, [ 1, 1, 0 ], 1 ];
6f1401dc 1882
895b760f
DM
1883 # eval should do tie, overload on its arg before checking taint */
1884 push @tests, [ '1;', 'eval q(eval %s); $@ =~ /Insecure/',
1885 '("")', '("")', [ 1, 2, 0 ], 0 ];
1886
1887
6f1401dc 1888 for my $sub (keys %subs) {
0f539b13 1889 no warnings 'experimental::smartmatch';
6f1401dc
DM
1890 my $term = $subs{$sub};
1891 my $t = sprintf $term, '$_[0][0]';
a02ec77a 1892 my $e ="sub { \$funcs .= '($sub)'; my \$r; if (\$use_int) {"
6f1401dc 1893 . "use integer; \$r = ($t) } else { \$r = ($t) } \$r }";
a02ec77a
DM
1894 $subs{$sub} = eval $e;
1895 die "Compiling sub gave error:\n<$e>\n<$@>\n" if $@;
6f1401dc
DM
1896 }
1897 }
1898
1899 my $fetches;
1900 my $stores;
1901
1902 package RT57012_OV;
1903
6f1401dc
DM
1904 use overload
1905 %subs,
a02ec77a
DM
1906 "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] },
1907 '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] },
1908 '""' => sub { $funcs .= '("")'; "$_[0][0]" },
1909 ;
1910
1911 package RT57012_OV_FB; # only contains fallback conversion functions
1912
1913 use overload
1914 "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] },
1915 '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] },
1916 '""' => sub { $funcs .= '("")'; "$_[0][0]" },
1917 "nomethod" => sub {
1918 $funcs .= "(NM:$_[3])";
1919 my $e = defined($_[1])
1920 ? $_[3] eq 'atan2'
1921 ? $_[2]
1922 ? "atan2(\$_[1],\$_[0][0])"
1923 : "atan2(\$_[0][0],\$_[1])"
1924 : $_[2]
1925 ? "\$_[1] $_[3] \$_[0][0]"
1926 : "\$_[0][0] $_[3] \$_[1]"
1927 : $_[3] eq 'neg'
1928 ? "-\$_[0][0]"
1929 : "$_[3](\$_[0][0])";
1930 my $r;
0f539b13 1931 no warnings 'experimental::smartmatch';
a02ec77a
DM
1932 if ($use_int) {
1933 use integer; $r = eval $e;
1934 }
1935 else {
1936 $r = eval $e;
1937 }
1938 ::diag("eval of nomethod <$e> gave <$@>") if $@;
1939 $r;
1940 }
1941
6f1401dc
DM
1942 ;
1943
1944 package RT57012_TIE_S;
1945
1946 my $tie_val;
a02ec77a 1947 sub TIESCALAR { bless [ bless [ $tie_val ], $_[1] ] }
6f1401dc
DM
1948 sub FETCH { $fetches++; $_[0][0] }
1949 sub STORE { $stores++; $_[0][0] = $_[1] }
1950
1951 package RT57012_TIE_A;
1952
1953 sub TIEARRAY { bless [] }
1954 sub FETCH { $fetches++; $_[0][0] }
1955 sub STORE { $stores++; $_[0][$_[1]] = $_[2] }
1956
1957 package main;
1958
a02ec77a
DM
1959 for my $test (@tests) {
1960 my ($val, $sub_term, $exp_funcs, $exp_fb_funcs,
1961 $exp_counts, $exp_taint) = @$test;
1962
1963 my $tainted_val;
1964 {
1965 # create tainted version of $val (unless its a ref)
1966 my $t = substr($^X,0,0);
1967 my $t0 = $t."0";
1968 my $val1 = $val; # use a copy to avoid stringifying original
1969 $tainted_val = ref($val1) ? $val :
1970 ($val1 =~ /^[\d\.]+$/) ? $val+$t0 : $val.$t;
1971 }
1972 $tie_val = $tainted_val;
6f1401dc 1973
6f1401dc
DM
1974 for my $int ('', 'use integer; ') {
1975 $use_int = ($int ne '');
a02ec77a
DM
1976 my $plain = $tainted_val;
1977 my $plain_term = $int . sprintf $sub_term, '$plain';
0f539b13 1978 my $exp = do {no warnings 'experimental::smartmatch'; eval $plain_term };
a02ec77a
DM
1979 diag("eval of plain_term <$plain_term> gave <$@>") if $@;
1980 is(tainted($exp), $exp_taint,
1981 "<$plain_term> taint of expected return");
1982
1983 for my $ov_pkg (qw(RT57012_OV RT57012_OV_FB)) {
a02ec77a
DM
1984 next if $ov_pkg eq 'RT57012_OV_FB'
1985 and not defined $exp_fb_funcs;
1986 my ($exp_fetch_a, $exp_fetch_s, $exp_store) =
1987 ($ov_pkg eq 'RT57012_OV' || @$exp_counts < 4)
1988 ? @$exp_counts[0,1,2]
1989 : @$exp_counts[3,4,5];
1990
1991 tie my $ts, 'RT57012_TIE_S', $ov_pkg;
6f1401dc 1992 tie my @ta, 'RT57012_TIE_A';
a02ec77a
DM
1993 $ta[0] = bless [ $tainted_val ], $ov_pkg;
1994 my $oload = bless [ $tainted_val ], $ov_pkg;
1995
9426e1a5
DM
1996 for my $var ('$ta[0]', '$ts', '$oload',
1997 ($sub_term eq '<%s>' ? '${ts}' : ())
1998 ) {
a02ec77a
DM
1999
2000 $funcs = '';
2001 $fetches = 0;
2002 $stores = 0;
2003
2004 my $res_term = $int . sprintf $sub_term, $var;
2005 my $desc = "<$res_term> $ov_pkg" ;
0f539b13 2006 my $res = do { no warnings 'experimental::smartmatch'; eval $res_term };
a02ec77a 2007 diag("eval of res_term $desc gave <$@>") if $@;
7f1e438c 2008 # uniquely, the inc/dec ops return the original
a02ec77a
DM
2009 # ref rather than a copy, so stringify it to
2010 # find out if its tainted
2011 $res = "$res" if $res_term =~ /\+\+|--/;
2012 is(tainted($res), $exp_taint,
2013 "$desc taint of result return");
a02ec77a
DM
2014 is($res, $exp, "$desc return value");
2015 my $fns =($ov_pkg eq 'RT57012_OV_FB')
2016 ? $exp_fb_funcs : $exp_funcs;
2017 if ($var eq '$oload' && $res_term !~ /oload(\+\+|--)/) {
2018 # non-tied overloading doesn't trigger a copy
2019 # except for post inc/dec
2020 $fns =~ s/^\(=\)//;
2021 }
2022 is($funcs, $fns, "$desc methods called");
2023 next if $var eq '$oload';
2024 my $exp_fetch = ($var eq '$ts') ?
2025 $exp_fetch_s : $exp_fetch_a;
2026 is($fetches, $exp_fetch, "$desc FETCH count");
2027 is($stores, $exp_store, "$desc STORE count");
2028
2029 }
2030
6f1401dc
DM
2031 }
2032 }
2033 }
2034}
2035
25222ff9
FC
2036# Test overload from the main package
2037fresh_perl_is
2038 '$^W = 1; use overload q\""\ => sub {"ning"}; print bless []',
2039 'ning',
2040 { switches => ['-wl'], stderr => 1 },
2041 'use overload from the main package'
2042;
2043
56f08af2
FC
2044{
2045 package blessed_methods;
2046 use overload '+' => sub {};
2047 bless overload::Method __PACKAGE__,'+';
2048 eval { overload::Method __PACKAGE__,'+' };
2049 ::is($@, '', 'overload::Method and blessed overload methods');
2050}
2051
bf5522a1
MB
2052{
2053 # fallback to 'cmp' and '<=>' with heterogeneous operands
2054 # [perl #71286]
2055 my $not_found = 'no method found';
2056 my $used = 0;
2057 package CmpBase;
2058 sub new {
2059 my $n = $_[1] || 0;
2060 bless \$n, ref $_[0] || $_[0];
2061 }
2062 sub cmp {
2063 $used = \$_[0];
2064 (${$_[0]} <=> ${$_[1]}) * ($_[2] ? -1 : 1);
2065 }
2066
2067 package NCmp;
383fb793 2068 use parent '-norequire', 'CmpBase';
bf5522a1
MB
2069 use overload '<=>' => 'cmp';
2070
2071 package SCmp;
383fb793 2072 use parent '-norequire', 'CmpBase';
bf5522a1
MB
2073 use overload 'cmp' => 'cmp';
2074
2075 package main;
2076 my $n = NCmp->new(5);
2077 my $s = SCmp->new(3);
2078 my $res;
2079
2080 eval { $res = $n > $s; };
2081 $res = $not_found if $@ =~ /$not_found/;
2082 is($res, 1, 'A>B using A<=> when B overloaded, no B<=>');
2083
2084 eval { $res = $s < $n; };
2085 $res = $not_found if $@ =~ /$not_found/;
2086 is($res, 1, 'A<B using B<=> when A overloaded, no A<=>');
2087
2088 eval { $res = $s lt $n; };
2089 $res = $not_found if $@ =~ /$not_found/;
2090 is($res, 1, 'A lt B using A:cmp when B overloaded, no B:cmp');
2091
2092 eval { $res = $n gt $s; };
2093 $res = $not_found if $@ =~ /$not_found/;
2094 is($res, 1, 'A gt B using B:cmp when A overloaded, no A:cmp');
2095
2096 my $o = NCmp->new(9);
2097 $res = $n < $o;
2098 is($used, \$n, 'A < B uses <=> from A in preference to B');
2099
2100 my $t = SCmp->new(7);
2101 $res = $s lt $t;
2102 is($used, \$s, 'A lt B uses cmp from A in preference to B');
2103}
2104
2105{
2106 # Combinatorial testing of 'fallback' and 'nomethod'
2107 # [perl #71286]
2108 package NuMB;
2109 use overload '0+' => sub { ${$_[0]}; },
2110 '""' => 'str';
2111 sub new {
2112 my $self = shift;
2113 my $n = @_ ? shift : 0;
2114 bless my $obj = \$n, ref $self || $self;
2115 }
2116 sub str {
2117 no strict qw/refs/;
2118 my $s = "(${$_[0]} ";
2119 $s .= "nomethod, " if defined ${ref($_[0]).'::(nomethod'};
2120 my $fb = ${ref($_[0]).'::()'};
2121 $s .= "fb=" . (defined $fb ? 0 + $fb : 'undef') . ")";
2122 }
2123 sub nomethod { "${$_[0]}.nomethod"; }
2124
2125 # create classes for tests
2126 package main;
2127 my @falls = (0, 'undef', 1);
2128 my @nomethods = ('', 'nomethod');
2129 my $not_found = 'no method found';
2130 for my $fall (@falls) {
2131 for my $nomethod (@nomethods) {
2132 my $nomethod_decl = $nomethod
2133 ? $nomethod . "=>'nomethod'," : '';
2134 eval qq{
2135 package NuMB$fall$nomethod;
383fb793 2136 use parent '-norequire', qw/NuMB/;
bf5522a1
MB
2137 use overload $nomethod_decl
2138 fallback => $fall;
2139 };
2140 }
2141 }
2142
2143 # operation and precedence of 'fallback' and 'nomethod'
2144 # for all combinations with 2 overloaded operands
2145 for my $nomethod2 (@nomethods) {
2146 for my $nomethod1 (@nomethods) {
2147 for my $fall2 (@falls) {
2148 my $pack2 = "NuMB$fall2$nomethod2";
2149 for my $fall1 (@falls) {
2150 my $pack1 = "NuMB$fall1$nomethod1";
2151 my ($test, $out, $exp);
2152 eval qq{
2153 my \$x = $pack1->new(2);
2154 my \$y = $pack2->new(3);
2155 \$test = "\$x" . ' * ' . "\$y";
2156 \$out = \$x * \$y;
2157 };
2158 $out = $not_found if $@ =~ /$not_found/;
2159 $exp = $nomethod1 ? '2.nomethod' :
2160 $nomethod2 ? '3.nomethod' :
2161 $fall1 eq '1' && $fall2 eq '1' ? 6
2162 : $not_found;
2163 is($out, $exp, "$test --> $exp");
2164 }
2165 }
2166 }
2167 }
2168
2169 # operation of 'fallback' and 'nomethod'
2170 # where the other operand is not overloaded
2171 for my $nomethod (@nomethods) {
2172 for my $fall (@falls) {
2173 my ($test, $out, $exp);
2174 eval qq{
2175 my \$x = NuMB$fall$nomethod->new(2);
2176 \$test = "\$x" . ' * 3';
2177 \$out = \$x * 3;
2178 };
2179 $out = $not_found if $@ =~ /$not_found/;
2180 $exp = $nomethod ? '2.nomethod' :
2181 $fall eq '1' ? 6
2182 : $not_found;
2183 is($out, $exp, "$test --> $exp");
2184
2185 eval qq{
2186 my \$x = NuMB$fall$nomethod->new(2);
2187 \$test = '3 * ' . "\$x";
2188 \$out = 3 * \$x;
2189 };
2190 $out = $not_found if $@ =~ /$not_found/;
2191 is($out, $exp, "$test --> $exp");
2192 }
2193 }
2194}
2195
bff33ce0
DM
2196# since 5.6 overloaded <> was leaving an extra arg on the stack!
2197
2198{
2199 package Iter1;
2200 use overload '<>' => sub { 11 };
2201 package main;
2202 my $a = bless [], 'Iter1';
2203 my $x;
2204 my @a = (10, ($x = <$a>), 12);
2205 is ($a[0], 10, 'Iter1: a[0]');
2206 is ($a[1], 11, 'Iter1: a[1]');
2207 is ($a[2], 12, 'Iter1: a[2]');
2208 @a = (10, ($x .= <$a>), 12);
2209 is ($a[0], 10, 'Iter1: a[0] concat');
2210 is ($a[1], 1111, 'Iter1: a[1] concat');
2211 is ($a[2], 12, 'Iter1: a[2] concat');
2212}
bf5522a1 2213
5e2699c2
FC
2214# Some tests for error messages
2215{
2216 package Justus;
2217 use overload '+' => 'justice';
bb4f579a 2218 eval {"".bless[]};
5e2699c2 2219 ::like $@, qr/^Can't resolve method "justice" overloading "\+" in p(?x:
f0e9f182 2220 )ackage "Justus" at /,
5e2699c2
FC
2221 'Error message when explicitly named overload method does not exist';
2222
2223 package JustUs;
2224 our @ISA = 'JustYou';
2225 package JustYou { use overload '+' => 'injustice'; }
2226 "JustUs"->${\"(+"};
bb4f579a 2227 eval {"".bless []};
5e2699c2 2228 ::like $@, qr/^Stub found while resolving method "\?{3}" overloadin(?x:
f0e9f182 2229 )g "\+" in package "JustUs" at /,
5e2699c2
FC
2230 'Error message when sub stub is encountered';
2231}
bf5522a1 2232
c4b0eb7f
DM
2233{
2234 # check that the right number of stringifications
2235 # and the correct un-utf8-ifying happen on regex compile
2236 package utf8_match;
2237 my $c;
2238 use overload '""' => sub { $c++; $_[0][0] ? "^\x{100}\$" : "^A\$"; };
2239 my $o = bless [0], 'utf8_match';
2240
2241 $o->[0] = 0;
2242 $c = 0;
2243 ::ok("A" =~ "^A\$", "regex stringify utf8=0 ol=0 bytes=0");
2244 ::ok("A" =~ $o, "regex stringify utf8=0 ol=1 bytes=0");
2245 ::is($c, 1, "regex stringify utf8=0 ol=1 bytes=0 count");
2246
2247 $o->[0] = 1;
2248 $c = 0;
2249 ::ok("\x{100}" =~ "^\x{100}\$",
2250 "regex stringify utf8=1 ol=0 bytes=0");
2251 ::ok("\x{100}" =~ $o, "regex stringify utf8=1 ol=1 bytes=0");
2252 ::is($c, 1, "regex stringify utf8=1 ol=1 bytes=0 count");
2253
2254 use bytes;
2255
2256 $o->[0] = 0;
2257 $c = 0;
2258 ::ok("A" =~ "^A\$", "regex stringify utf8=0 ol=0 bytes=1");
2259 ::ok("A" =~ $o, "regex stringify utf8=0 ol=1 bytes=1");
2260 ::is($c, 1, "regex stringify utf8=0 ol=1 bytes=1 count");
2261
2262 $o->[0] = 1;
2263 $c = 0;
9b513004 2264 ::ok(main::byte_utf8a_to_utf8n("\xc4\x80") =~ "^\x{100}\$",
c4b0eb7f 2265 "regex stringify utf8=1 ol=0 bytes=1");
9b513004 2266 ::ok(main::byte_utf8a_to_utf8n("\xc4\x80") =~ $o, "regex stringify utf8=1 ol=1 bytes=1");
c4b0eb7f
DM
2267 ::is($c, 1, "regex stringify utf8=1 ol=1 bytes=1 count");
2268
2269
2270}
2271
d4a6f307
DM
2272# [perl #40333]
2273# overload::Overloaded should not use a ->can designed for autoloading.
2274# This example attempts to be as realistic as possible. The o class has a
2275# default singleton object, but can have instances, too. The proxy class
2276# represents proxies for o objects, but class methods delegate to the
2277# singleton.
2278# overload::Overloaded used to return incorrect results for proxy objects.
2279package proxy {
2280 sub new { bless [$_[1]], $_[0] }
2281 sub AUTOLOAD {
2282 our $AUTOLOAD =~ s/.*:://;
2283 &_self->$AUTOLOAD;
2284 }
2285 sub can { SUPER::can{@_} || &_self->can($_[1]) }
2286 sub _self { ref $_[0] ? $_[0][0] : $o::singleton }
2287}
2288package o { use overload '""' => sub { 'keck' };
2289 sub new { bless[], $_[0] }
2290 our $singleton = o->new; }
2291ok !overload::Overloaded(new proxy new o),
2292 'overload::Overloaded does not incorrectly return true for proxy classes';
2293
2294# Another test, based on the type of explosive test class for which
2295# perl #40333 was filed.
2296{
2297 package broken_can;
2298 sub can {}
2299 use overload '""' => sub {"Ahoy!"};
2300
2301 package main;
2302 my $obj = bless [], 'broken_can';
2303 ok(overload::Overloaded($obj));
2304}
2305
bb4f579a
DM
2306sub eleventative::cos { 'eleven' }
2307sub twelvetative::abs { 'twelve' }
2308sub thirteentative::abs { 'thirteen' }
2309sub fourteentative::abs { 'fourteen' }
2310@eleventative::ISA = twelvetative::;
2311{
2312 my $o = bless [], 'eleventative';
2313 eval 'package eleventative; use overload map +($_)x2, cos=>abs=>';
2314 is cos $o, 'eleven', 'overloading applies to object blessed before';
2315 bless [], 'eleventative';
2316 is cos $o, 'eleven',
2317 'ovrld applies to previously-blessed obj after other obj is blessed';
2318 $o = bless [], 'eleventative';
2319 *eleventative::cos = sub { 'ten' };
2320 is cos $o, 'ten', 'method changes affect overloading';
2321 @eleventative::ISA = thirteentative::;
2322 is abs $o, 'thirteen', 'isa changes affect overloading';
2323 bless $o, 'fourteentative';
2324 @fourteentative::ISA = 'eleventative';
2325 is abs $o, 'fourteen', 'isa changes can turn overloading on';
2326}
2327
2328# no overload "fallback";
2329{ package phake;
2330 use overload fallback => 1, '""' => sub { 'arakas' };
2331 no overload 'fallback';
2332}
2333$a = bless [], 'phake';
2334is "$a", "arakas",
2335 'no overload "fallback" does not stop overload from working';
2336ok !eval { () = $a eq 'mpizeli'; 1 },
2337 'no overload "fallback" resets fallback to undef on overloaded class';
2338{ package ent; use overload fallback => 0, abs => sub{};
2339 our@ISA = 'huorn';
2340 package huorn;
2341 use overload fallback => 1;
2342 package ent;
2343 no overload "fallback"; # disable previous declaration
2344}
2345$a = bless [], ent::;
2346is eval {"$a"}, overload::StrVal($a),
2347 'no overload undoes fallback declaration completetly'
2348 or diag $@;
2349
2350# inherited fallback
2351{
2352 package pervyy;
2353 our @ISA = 'vtoryy';
2354 use overload "abs" =>=> sub {};
2355 package vtoryy;
2356 use overload fallback => 1, 'sin' =>=> sub{}
2357}
2358$a = bless [], pervyy::;
2359is eval {"$a"}, overload::StrVal($a),
2360 'fallback is inherited by classes that have their own overloading'
2361 or diag $@;
2362
2363# package separators in method names
2364{
2365 package mane;
2366 use overload q\""\ => "bear::strength";
2367 use overload bool => "bear'bouillon";
2368}
2369@bear::ISA = 'food';
2370sub food::strength { 'twine' }
2371sub food::bouillon { 0 }
2372$a = bless[], mane::;
2373is eval { "$a" }, 'twine', ':: in method name' or diag $@;
2374is eval { !$a }, 1, "' in method name" or diag $@;
2375
2376# [perl #113050] Half of CPAN assumes fallback is under "()"
2377{
2378 package dodo;
2379 use overload '+' => sub {};
2380 no strict;
2381 *{"dodo::()"} = sub{};
2382 ${"dodo::()"} = 1;
2383}
2384$a = bless [],'dodo';
2385is eval {"$a"}, overload::StrVal($a), 'fallback is stored under "()"';
2386
67288365
JL
2387# [perl #47119]
2388{
2389 my $context;
2390
2391 {
2392 package Splitter;
2393 use overload '<>' => \&chars;
2394
2395 sub new {
2396 my $class = shift;
2397 my ($string) = @_;
2398 bless \$string, $class;
2399 }
2400
2401 sub chars {
2402 my $self = shift;
2403 my @chars = split //, $$self;
2404 $context = wantarray;
2405 return @chars;
2406 }
2407 }
2408
2409 my $obj = Splitter->new('bar');
2410
2411 $context = 42; # not 1, '', or undef
2412
2413 my @foo = <$obj>;
2414 is($context, 1, "list context (readline list)");
2415 is(scalar(@foo), 3, "correct result (readline list)");
2416 is($foo[0], 'b', "correct result (readline list)");
2417 is($foo[1], 'a', "correct result (readline list)");
2418 is($foo[2], 'r', "correct result (readline list)");
2419
2420 $context = 42;
2421
2422 my $foo = <$obj>;
2423 ok(defined($context), "scalar context (readline scalar)");
2424 is($context, '', "scalar context (readline scalar)");
2425 is($foo, 3, "correct result (readline scalar)");
2426
2427 $context = 42;
2428
2429 <$obj>;
2430 ok(!defined($context), "void context (readline void)");
2431
2432 $context = 42;
2433
2434 my @bar = <${obj}>;
2435 is($context, 1, "list context (glob list)");
2436 is(scalar(@bar), 3, "correct result (glob list)");
2437 is($bar[0], 'b', "correct result (glob list)");
2438 is($bar[1], 'a', "correct result (glob list)");
2439 is($bar[2], 'r', "correct result (glob list)");
2440
2441 $context = 42;
2442
2443 my $bar = <${obj}>;
2444 ok(defined($context), "scalar context (glob scalar)");
2445 is($context, '', "scalar context (glob scalar)");
2446 is($bar, 3, "correct result (glob scalar)");
2447
2448 $context = 42;
2449
2450 <${obj}>;
2451 ok(!defined($context), "void context (glob void)");
2452}
2453{
2454 my $context;
2455
2456 {
2457 package StringWithContext;
2458 use overload '""' => \&stringify;
2459
2460 sub new {
2461 my $class = shift;
2462 my ($string) = @_;
2463 bless \$string, $class;
2464 }
2465
2466 sub stringify {
2467 my $self = shift;
2468 $context = wantarray;
2469 return $$self;
2470 }
2471 }
2472
2473 my $obj = StringWithContext->new('bar');
2474
2475 $context = 42;
2476
2477 my @foo = "".$obj;
2478 ok(defined($context), "scalar context (stringify list)");
2479 is($context, '', "scalar context (stringify list)");
2480 is(scalar(@foo), 1, "correct result (stringify list)");
2481 is($foo[0], 'bar', "correct result (stringify list)");
2482
2483 $context = 42;
2484
2485 my $foo = "".$obj;
2486 ok(defined($context), "scalar context (stringify scalar)");
2487 is($context, '', "scalar context (stringify scalar)");
2488 is($foo, 'bar', "correct result (stringify scalar)");
2489
2490 $context = 42;
2491
2492 "".$obj;
2493
2494 is($context, '', "scalar context (stringify void)");
2495}
2496{
2497 my ($context, $swap);
2498
2499 {
2500 package AddWithContext;
2501 use overload '+' => \&add;
2502
2503 sub new {
2504 my $class = shift;
2505 my ($num) = @_;
2506 bless \$num, $class;
2507 }
2508
2509 sub add {
2510 my $self = shift;
2511 my ($other, $swapped) = @_;
2512 $context = wantarray;
2513 $swap = $swapped;
2514 return ref($self)->new($$self + $other);
2515 }
2516
2517 sub val { ${ $_[0] } }
2518 }
2519
2520 my $obj = AddWithContext->new(6);
2521
2522 $context = $swap = 42;
2523
2524 my @foo = $obj + 7;
2525 ok(defined($context), "scalar context (add list)");
2526 is($context, '', "scalar context (add list)");
2527 ok(defined($swap), "not swapped (add list)");
2528 is($swap, '', "not swapped (add list)");
2529 is(scalar(@foo), 1, "correct result (add list)");
2530 is($foo[0]->val, 13, "correct result (add list)");
2531
2532 $context = $swap = 42;
2533
2534 @foo = 7 + $obj;
2535 ok(defined($context), "scalar context (add list swap)");
2536 is($context, '', "scalar context (add list swap)");
2537 ok(defined($swap), "swapped (add list swap)");
2538 is($swap, 1, "swapped (add list swap)");
2539 is(scalar(@foo), 1, "correct result (add list swap)");
2540 is($foo[0]->val, 13, "correct result (add list swap)");
2541
2542 $context = $swap = 42;
2543
2544 my $foo = $obj + 7;
2545 ok(defined($context), "scalar context (add scalar)");
2546 is($context, '', "scalar context (add scalar)");
2547 ok(defined($swap), "not swapped (add scalar)");
2548 is($swap, '', "not swapped (add scalar)");
2549 is($foo->val, 13, "correct result (add scalar)");
2550
2551 $context = $swap = 42;
2552
2553 my $foo = 7 + $obj;
2554 ok(defined($context), "scalar context (add scalar swap)");
2555 is($context, '', "scalar context (add scalar swap)");
2556 ok(defined($swap), "swapped (add scalar swap)");
2557 is($swap, 1, "swapped (add scalar swap)");
2558 is($foo->val, 13, "correct result (add scalar swap)");
2559
2560 $context = $swap = 42;
2561
2562 $obj + 7;
2563
2564 ok(!defined($context), "void context (add void)");
2565 ok(defined($swap), "not swapped (add void)");
2566 is($swap, '', "not swapped (add void)");
2567
2568 $context = $swap = 42;
2569
2570 7 + $obj;
2571
2572 ok(!defined($context), "void context (add void swap)");
2573 ok(defined($swap), "swapped (add void swap)");
2574 is($swap, 1, "swapped (add void swap)");
2575
2576 $obj = AddWithContext->new(6);
2577
2578 $context = $swap = 42;
2579
2580 my @foo = $obj += 7;
2581 ok(defined($context), "scalar context (add assign list)");
2582 is($context, '', "scalar context (add assign list)");
2583 ok(!defined($swap), "not swapped and autogenerated (add assign list)");
2584 is(scalar(@foo), 1, "correct result (add assign list)");
2585 is($foo[0]->val, 13, "correct result (add assign list)");
2586 is($obj->val, 13, "correct result (add assign list)");
2587
2588 $obj = AddWithContext->new(6);
2589
2590 $context = $swap = 42;
2591
2592 my $foo = $obj += 7;
2593 ok(defined($context), "scalar context (add assign scalar)");
2594 is($context, '', "scalar context (add assign scalar)");
2595 ok(!defined($swap), "not swapped and autogenerated (add assign scalar)");
2596 is($foo->val, 13, "correct result (add assign scalar)");
2597 is($obj->val, 13, "correct result (add assign scalar)");
2598
2599 $obj = AddWithContext->new(6);
2600
2601 $context = $swap = 42;
2602
2603 $obj += 7;
2604
2605 ok(defined($context), "scalar context (add assign void)");
2606 is($context, '', "scalar context (add assign void)");
2607 ok(!defined($swap), "not swapped and autogenerated (add assign void)");
2608 is($obj->val, 13, "correct result (add assign void)");
2609
2610 $obj = AddWithContext->new(6);
2611
2612 $context = $swap = 42;
2613
2614 my @foo = ++$obj;
2615 ok(defined($context), "scalar context (add incr list)");
2616 is($context, '', "scalar context (add incr list)");
2617 ok(!defined($swap), "not swapped and autogenerated (add incr list)");
2618 is(scalar(@foo), 1, "correct result (add incr list)");
2619 is($foo[0]->val, 7, "correct result (add incr list)");
2620 is($obj->val, 7, "correct result (add incr list)");
2621
2622 $obj = AddWithContext->new(6);
2623
2624 $context = $swap = 42;
2625
2626 my $foo = ++$obj;
2627 ok(defined($context), "scalar context (add incr scalar)");
2628 is($context, '', "scalar context (add incr scalar)");
2629 ok(!defined($swap), "not swapped and autogenerated (add incr scalar)");
2630 is($foo->val, 7, "correct result (add incr scalar)");
2631 is($obj->val, 7, "correct result (add incr scalar)");
2632
2633 $obj = AddWithContext->new(6);
2634
2635 $context = $swap = 42;
2636
2637 ++$obj;
2638
2639 ok(defined($context), "scalar context (add incr void)");
2640 is($context, '', "scalar context (add incr void)");
2641 ok(!defined($swap), "not swapped and autogenerated (add incr void)");
2642 is($obj->val, 7, "correct result (add incr void)");
2643}
2644
386a5489
JL
2645# [perl #113010]
2646{
2647 {
2648 package OnlyFallback;
2649 use overload fallback => 0;
2650 }
79c9643d
JL
2651 {
2652 my $obj = bless {}, 'OnlyFallback';
2653 my $died = !eval { "".$obj; 1 };
2654 my $err = $@;
2655 ok($died, "fallback of 0 causes error");
2656 like($err, qr/"\.": no method found/, "correct error");
2657 }
2658
2659 {
2660 package OnlyFallbackUndef;
2661 use overload fallback => undef;
2662 }
2663 {
2664 my $obj = bless {}, 'OnlyFallbackUndef';
2665 my $died = !eval { "".$obj; 1 };
2666 my $err = $@;
2667 ok($died, "fallback of undef causes error");
2668 # this one tries falling back to stringify before dying
2669 like($err, qr/"""": no method found/, "correct error");
2670 }
2671
2672 {
2673 package OnlyFallbackTrue;
2674 use overload fallback => 1;
2675 }
2676 {
2677 my $obj = bless {}, 'OnlyFallbackTrue';
2678 my $val;
2679 my $died = !eval { $val = "".$obj; 1 };
2680 my $err = $@;
2681 ok(!$died, "fallback of 1 doesn't cause error")
2682 || diag("got error of $err");
2683 like($val, qr/^OnlyFallbackTrue=HASH\(/, "stringified correctly");
2684 }
386a5489 2685}
bb4f579a 2686
00bf6ed2
DM
2687{
2688 # Making Regexp class overloaded: avoid infinite recursion.
2689 # Do this in a separate process since it, well, overloads Regexp!
2690 fresh_perl_is(
2691 <<'EOF',
2692package Regexp;
2693use overload q{""} => sub {$_[0] };
2694package main;
2695my $r1 = qr/1/;
2696my $r2 = qr/ABC$r1/;
2697print $r2,"\n";
2698EOF
2699 '(?^:ABC(?^:1))',
2700 { stderr => 1 },
2701 'overloaded REGEXP'
2702 );
2703}
2704
45479970
DM
2705{
2706 # RT #121362
2707 # splitting the stash HV while rebuilding the overload cache gave
2708 # valgrind errors. This test code triggers such a split. It doesn't
2709 # actually test anything; its just there for valgrind to spot
2710 # problems.
2711
2712 package A_121362;
2713
2714 sub stringify { }
2715 use overload '""' => 'stringify';
2716
2717 package B_121362;
2718 our @ISA = qw(A_121362);
2719
2720 package main;
2721
2722 my $x = bless { }, 'B_121362';
2723
2724 for ('a'..'z') {
2725 delete $B_121362::{stringify}; # delete cache entry
2726 no strict 'refs';
2727 *{"B_121362::$_"} = sub { }; # increase size of %B_121362
2728 my $y = $x->{value}; # trigger cache add to %B_121362
2729 }
2730 pass("RT 121362");
2731}
2732
eff75473
FC
2733package refsgalore {
2734 use overload
2735 '${}' => sub { \42 },
2736 '@{}' => sub { [43] },
2737 '%{}' => sub { { 44 => 45 } },
2738 '&{}' => sub { sub { 46 } };
2739}
2740{
2741 use feature 'postderef';
eff75473
FC
2742 tell myio; # vivifies *myio{IO} at compile time
2743 use constant ioref => bless *myio{IO}, refsgalore::;
2744 is ioref->$*, 42, '(overloaded constant that is not a scalar ref)->$*';
2745 is ioref->[0], 43, '(ovrld constant that is not an array ref)->[0]';
2746 is ioref->{44}, 45, "(ovrld const that is not a hash ref)->{key}";
2747 is ioref->(), 46, '(overloaded constant that is not a sub ref)->()';
2748}
45479970 2749
3a100dab
FC
2750package xstack { use overload 'x' => sub { shift . " x " . shift },
2751 '""'=> sub { "xstack" } }
2752is join(",", 1..3, scalar((bless([], 'xstack')) x 3, 1), 4..6),
2753 "1,2,3,1,4,5,6",
2754 '(...)x... in void cx with x overloaded [perl #121827]';
2755
e6288bd5
FC
2756package bitops {
2757 our @o;
2758 use overload do {
2759 my %o;
2760 for my $o (qw(& | ^ ~ &. |. ^. ~. &= |= ^= &.= |.= ^.=)) {
636ac8fc
FC
2761 $o{$o} = sub {
2762 ::ok !defined $_[3], "undef (or nonexistent) arg 3 for $o";
2763 push @o, $o, scalar @_, $_[4]//'u';
2764 $_[0]
2765 }
e6288bd5
FC
2766 }
2767 %o, '=' => sub { bless [] };
2768 }
2769}
2770{
2771 use experimental 'bitwise';
2772 my $o = bless [], bitops::;
2773 $_ = $o & 0;
2774 $_ = $o | 0;
2775 $_ = $o ^ 0;
2776 $_ = ~$o;
2777 $_ = $o &. 0;
2778 $_ = $o |. 0;
2779 $_ = $o ^. 0;
2780 $_ = ~.$o;
2781 $o &= 0;
2782 $o |= 0;
2783 $o ^= 0;
2784 $o &.= 0;
2785 $o |.= 0;
2786 $o ^.= 0;
636ac8fc
FC
2787 # elems are in triplets: op, length of @_, numeric? (1/u for y/n)
2788 is "@bitops::o", '& 5 1 | 5 1 ^ 5 1 ~ 5 1 &. 3 u |. 3 u ^. 3 u ~. 3 u ' . '&= 5 1 |= 5 1 ^= 5 1 &.= 3 u |.= 3 u ^.= 3 u',
e6288bd5
FC
2789 'experimental "bitwise" ops'
2790}
636ac8fc
FC
2791package bitops2 {
2792 our @o;
2793 use overload
2794 nomethod => sub { push @o, $_[3], scalar @_, $_[4]//'u'; $_[0] },
2795 '=' => sub { bless [] };
2796}
2797{
2798 use experimental 'bitwise';
2799 my $o = bless [], bitops2::;
2800 $_ = $o & 0;
2801 $_ = $o | 0;
2802 $_ = $o ^ 0;
2803 $_ = ~$o;
2804 $_ = $o &. 0;
2805 $_ = $o |. 0;
2806 $_ = $o ^. 0;
2807 $_ = ~.$o;
2808 $o &= 0;
2809 $o |= 0;
2810 $o ^= 0;
2811 $o &.= 0;
2812 $o |.= 0;
2813 $o ^.= 0;
2814 # elems are in triplets: op, length of @_, numeric? (1/u for y/n)
2815 is "@bitops2::o", '& 5 1 | 5 1 ^ 5 1 ~ 5 1 &. 4 u |. 4 u ^. 4 u ~. 4 u ' . '&= 5 1 |= 5 1 ^= 5 1 &.= 4 u |.= 4 u ^.= 4 u',
2816 'experimental "bitwise" ops with nomethod'
2817}
e6288bd5 2818
5b750817
DM
2819package length_utf8 {
2820 use overload '""' => sub { "\x{100}" };
2821 my $o = bless [];
2822print length $o, "\n";
2823
2824 ::is length($o), 1, "overloaded utf8 length";
2825 ::is "$o", "\x{100}", "overloaded utf8 value";
2826}
2827
2828
bb4f579a
DM
2829{ # undefining the overload stash -- KEEP THIS TEST LAST
2830 package ant;
2831 use overload '+' => 'onion';
2832 $_ = \&overload::nil;
2833 undef %overload::;
2834 ()=0+bless[];
2835 ::ok(1, 'no crash when undefining %overload::');
2836}
2837
d4a6f307 2838
c0acf911
DM
2839# test various aspects of string concat overloading, especially where
2840# multiple concats etc are optimised into a single multiconcat op
2841
2842package Concat {
2843
2844 my $id;
2845
2846 # append a brief description of @_ to $id
2847 sub id {
2848 my @a = map ref $_ ? "[" . $_->[0] . "]" :
2849 !defined $_ ? "u" :
2850 $_,
2851 @_;
2852 $id .= '(' . join (',', @a) . ')';
2853 }
2854
2855 use overload
2856 '.' => sub {
2857 id('.', @_);
2858 my ($l, $r, $rev) = @_;
2859 ($l, $r) = map ref $_ ? $_->[0] : $_, $l, $r;
2860 ($l,$r) = ($r, $l) if $rev;
2861 bless [ $l . $r ];
2862 },
2863
2864 '.=' => sub {
2865 id('.=', @_);
2866 my ($l, $r, $rev) = @_;
2867 my ($ll, $rr) = map ref $_ ? $_->[0] : $_, $l, $r;
2868 die "Unexpected reverse in .=" if $rev;
2869 $l->[0] .= ref $r ? $r->[0] : $r;
2870 $l;
2871 },
2872
2873 '=' => sub {
2874 id('=', @_);
2875 bless [ $_[0][0] ];
2876 },
2877
2878 '""' => sub {
2879 id('""', @_);
2880 $_[0][0];
2881 },
2882 ;
2883
2884 my $a = 'a';
2885 my $b = 'b';
2886 my $c = 'c';
2887 my $A = bless [ 'A' ];
2888 my $B = bless [ 'B' ];
2889 my $C = bless [ 'C' ];
2890
2891 my ($r, $R);
2892
2893
2894 # like c, but with $is_ref set to 1
2895 sub c {
2896 my ($expr, $expect, $exp_id) = @_;
2897 cc($expr, $expect, 1, $exp_id);
2898 }
2899
2900 # eval $expr, and see if it returns $expect, and whether
2901 # the returned value is a ref ($is_ref). Finally, check that
2902 # $id, which has accumulated info from all overload method calls,
2903 # matches $exp_id.
2904
2905 sub cc {
2906 my ($expr, $expect, $is_ref, $exp_id) = @_;
2907
2908 $id = '';
2909 $r = 'r';
2910 $R = bless ['R'];
2911
2912 my $got = eval $expr;
2913 die "eval failed: $@" if $@;
2914 ::is "$got", $expect, "expect: $expr";
2915 ::is $id, $exp_id, "id: $expr";
2916 ::is ref($got), ($is_ref ? 'Concat' : ''), "is_ref: $expr";
2917 }
2918
2919 # single concats
2920
2921 c '$r=$A.$b', 'Ab', '(.,[A],b,)("",[Ab],u,)';
2922 c '$r=$a.$B', 'aB', '(.,[B],a,1)("",[aB],u,)';
2923 c '$r=$A.$B', 'AB', '(.,[A],[B],)("",[AB],u,)';
2924 c '$R.=$a', 'Ra', '(.=,[R],a,u)("",[Ra],u,)';
2925 c '$R.=$A', 'RA', '(.=,[R],[A],u)("",[RA],u,)';
2926
2927 # two concats
2928
2929 c '$r=$A.$b.$c', 'Abc', '(.,[A],b,)(.=,[Ab],c,u)("",[Abc],u,)';
2930 c '$r=$A.($b.$c)', 'Abc', '(.,[A],bc,)("",[Abc],u,)';
2931 c '$r=$a.$B.$c', 'aBc', '(.,[B],a,1)(.=,[aB],c,u)("",[aBc],u,)';
2932 c '$r=$a.($B.$c)', 'aBc', '(.,[B],c,)(.,[Bc],a,1)("",[aBc],u,)';
2933 c '$r=$a.$b.$C', 'abC', '(.,[C],ab,1)("",[abC],u,)';
2934 c '$r=$a.($b.$C)', 'abC', '(.,[C],b,1)(.,[bC],a,1)("",[abC],u,)';
2935
2936 # two concats plus mutator
2937
2938 c '$r.=$A.$b.$c', 'rAbc', '(.,[A],b,)(.=,[Ab],c,u)(.,[Abc],r,1)'
2939 .'("",[rAbc],u,)';
2940 c '$r.=$A.($b.$c)', 'rAbc', '(.,[A],bc,)(.,[Abc],r,1)("",[rAbc],u,)';
2941 c '$r.=$a.$B.$c', 'raBc', '(.,[B],a,1)(.=,[aB],c,u)(.,[aBc],r,1)'
2942 .'("",[raBc],u,)';
2943 c '$r.=$a.($B.$c)', 'raBc', '(.,[B],c,)(.,[Bc],a,1)(.,[aBc],r,1)'
2944 .'("",[raBc],u,)';
2945 c '$r.=$a.$b.$C', 'rabC', '(.,[C],ab,1)(.,[abC],r,1)("",[rabC],u,)';
2946 c '$r.=$a.($b.$C)', 'rabC', '(.,[C],b,1)(.,[bC],a,1)(.,[abC],r,1)'
2947 .'("",[rabC],u,)';
2948
2949 c '$R.=$A.$b.$c', 'RAbc', '(.,[A],b,)(.=,[Ab],c,u)(.=,[R],[Abc],u)'
2950 .'("",[RAbc],u,)';
2951 c '$R.=$A.($b.$c)', 'RAbc', '(.,[A],bc,)(.=,[R],[Abc],u)("",[RAbc],u,)';
2952 c '$R.=$a.$B.$c', 'RaBc', '(.,[B],a,1)(.=,[aB],c,u)(.=,[R],[aBc],u)'
2953 .'("",[RaBc],u,)';
2954 c '$R.=$a.($B.$c)', 'RaBc', '(.,[B],c,)(.,[Bc],a,1)(.=,[R],[aBc],u)'
2955 .'("",[RaBc],u,)';
2956 c '$R.=$a.$b.$C', 'RabC', '(.,[C],ab,1)(.=,[R],[abC],u)("",[RabC],u,)';
2957 c '$R.=$a.($b.$C)', 'RabC', '(.,[C],b,1)(.,[bC],a,1)(.=,[R],[abC],u)'
2958 .'("",[RabC],u,)';
2959
2960 # concat over assign
2961
2962 c '($R.=$a).$B.$c', 'RaBc', '(.=,[R],a,u)(.,[Ra],[B],)(.=,[RaB],c,u)'
2963 .'("",[RaBc],u,)';
2964 ::is "$R", "Ra", 'R in concat over assign';
2965
2966
2967 # nested mutators
2968
2969 c '(($R.=$a).=$b).=$c', 'Rabc', '(.=,[R],a,u)(=,[Ra],u,)(.=,[Ra],b,u)'
2970 . '(=,[Rab],u,)(.=,[Rab],c,u)("",[Rabc],u,)';
2971 c '(($R.=$a).=$B).=$c', 'RaBc', '(.=,[R],a,u)(=,[Ra],u,)(.=,[Ra],[B],u)'
2972 . '(=,[RaB],u,)(.=,[RaB],c,u)("",[RaBc],u,)';
2973
2974 # plain SV on both LHS and RHS with RHS object
2975
2976 c '$r=$r.$A.$r', 'rAr', '(.,[A],r,1)(.=,[rA],r,u)("",[rAr],u,)';
2977 c '$r.=$r.$A.$r', 'rrAr', '(.,[A],r,1)(.=,[rA],r,u)(.,[rAr],r,1)'
2978 .'("",[rrAr],u,)';
2979
2980 # object on both LHS and RHS
2981
2982 c '$R.=$R', 'RR', '(.=,[R],[R],u)("",[RR],u,)';
2983 c '$R.=$R.$b.$c', 'RRbc', '(.,[R],b,)(.=,[Rb],c,u)(.=,[R],[Rbc],u)'
2984 .'("",[RRbc],u,)';
2985 c '$R.=$a.$R.$c', 'RaRc', '(.,[R],a,1)(.=,[aR],c,u)(.=,[R],[aRc],u)'
2986 .'("",[RaRc],u,)';
2987 c '$R.=$a.$b.$R', 'RabR', '(.,[R],ab,1)(.=,[R],[abR],u)("",[RabR],u,)';
2988
2989
2990 # sprintf shouldn't do concat overloading
2991
2992 cc '$r=sprintf("%s%s%s",$a,$B,$c)', 'aBc', 0, '("",[B],u,)';
2993 cc '$R=sprintf("%s%s%s",$a,$B,$c)', 'aBc', 0, '("",[B],u,)';
2994 cc '$r.=sprintf("%s%s%s",$a,$B,$c)', 'raBc', 0, '("",[B],u,)';
2995 cc '$R.=sprintf("%s%s%s",$a,$B,$c)', 'RaBc', 1, '("",[B],u,)(.=,[R],aBc,u)'
2996 .'("",[RaBc],u,)';
2997}
b3ab0375
DM
2998
2999# RT #132385
3000# The first arg of a reversed concat shouldn't be stringified:
3001# $left . $right
3002# where $right is overloaded, should invoke
3003# concat($right, $left, 1)
3004# rather than
3005# concat($right, "$left", 1)
d7e75038
DM
3006# There's a similar issue with
3007# $left .= $right
3008# when left is overloaded
b3ab0375
DM
3009
3010package RT132385 {
3011
3012 use constant C => [ "constref" ];
3013
3014 use overload '.' => sub {
d7e75038
DM
3015 my ($l, $r, $rev) = @_;
3016 ($l,$r) = ($r,$l) if $rev;
3017 $l = ref $l ? $l->[0] : "$l";
3018 $r = ref $r ? $r->[0] : "$r";
3019 "$l-$r";
b3ab0375
DM
3020 }
3021 ;
3022
3023 my $r1 = [ "ref1" ];
3024 my $r2 = [ "ref2" ];
3025 my $s1 = "str1";
3026
3027 my $o = bless [ "obj" ];
3028
3029 # try variations that will call either pp_concat or pp_multiconcat,
3030 # with the ref as the first or a later arg
3031
3032 ::is($r1.$o, "ref1-obj", "RT #132385 r1.o");
3033 ::is($r1.$o.$s1 , "ref1-objstr1", "RT #132385 r1.o.s1");
3034 ::is("const".$o.$s1 ,"const-objstr1", "RT #132385 const.o.s1");
3035 ::is(C.$o.$s1 ,"constref-objstr1", "RT #132385 C.o.s1");
3036
3037 ::like($r1.$r2.$o, qr/^ARRAY\(0x\w+\)ARRAY\(0x\w+\)-obj/,
3038 "RT #132385 r1.r2.o");
d7e75038
DM
3039
3040 # ditto with a mutator
3041 ::is($o .= $r1, "obj-ref1", "RT #132385 o.=r1");
b3ab0375 3042}