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Revert "Lookup overloaded assignment operators when trying to swap the arguments"
[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;
25222ff9 50BEGIN { require './test.pl' }
00bf6ed2 51plan tests => 5191;
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
DM
307$na = eval { ~$aI };
308like($@, '');
8ebc5c01
PP
309
310bless \$x, OscalarI;
311
312$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
1dc13c17
SC
1024# BugID 20010422.003
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{
1296 package Sklorsh;
1297 use overload
1298 bool => sub { shift->is_cool };
1299
1300 sub is_cool {
1301 $_[0]->{name} eq 'cool';
1302 }
1303
1304 sub delete {
1305 undef %{$_[0]};
1306 bless $_[0], 'Brap';
1307 return 1;
1308 }
1309
1310 sub delete_with_self {
1311 my $self = shift;
1312 undef %$self;
1313 bless $self, 'Brap';
1314 return 1;
1315 }
1316
1317 package Brap;
1318
1319 1;
1320
1321 package main;
1322
1323 my $obj;
1324 $obj = bless {name => 'cool'}, 'Sklorsh';
1325 $obj->delete;
b0bf6df7 1326 ok(eval {if ($obj) {1}; 1}, $@ || 'reblessed into nonexistent namespace');
dd2eae66
NC
1327
1328 $obj = bless {name => 'cool'}, 'Sklorsh';
1329 $obj->delete_with_self;
1330 ok (eval {if ($obj) {1}; 1}, $@);
1331
1332 my $a = $b = {name => 'hot'};
1333 bless $b, 'Sklorsh';
1334 is(ref $a, 'Sklorsh');
1335 is(ref $b, 'Sklorsh');
1336 ok(!$b, "Expect overloaded boolean");
1337 ok(!$a, "Expect overloaded boolean");
1338}
edbe35ea
VP
1339
1340{
1341 package Flrbbbbb;
1342 use overload
1343 bool => sub { shift->{truth} eq 'yes' },
1344 '0+' => sub { shift->{truth} eq 'yes' ? '1' : '0' },
1345 '!' => sub { shift->{truth} eq 'no' },
1346 fallback => 1;
1347
1348 sub new { my $class = shift; bless { truth => shift }, $class }
1349
1350 package main;
1351
1352 my $yes = Flrbbbbb->new('yes');
1353 my $x;
1354 $x = 1 if $yes; is($x, 1);
1355 $x = 2 unless $yes; is($x, 1);
1356 $x = 3 if !$yes; is($x, 1);
1357 $x = 4 unless !$yes; is($x, 4);
1358
1359 my $no = Flrbbbbb->new('no');
1360 $x = 0;
1361 $x = 1 if $no; is($x, 0);
1362 $x = 2 unless $no; is($x, 2);
1363 $x = 3 if !$no; is($x, 3);
1364 $x = 4 unless !$no; is($x, 3);
1365
1366 $x = 0;
1367 $x = 1 if !$no && $yes; is($x, 1);
1368 $x = 2 unless !$no && $yes; is($x, 1);
1369 $x = 3 if $no || !$yes; is($x, 1);
1370 $x = 4 unless $no || !$yes; is($x, 4);
1371
1372 $x = 0;
1373 $x = 1 if !$no || !$yes; is($x, 1);
1374 $x = 2 unless !$no || !$yes; is($x, 1);
1375 $x = 3 if !$no && !$yes; is($x, 1);
1376 $x = 4 unless !$no && !$yes; is($x, 4);
1377}
1378
ea940d6b 1379{
2372186a
NC
1380 use Scalar::Util 'weaken';
1381
1382 package Shklitza;
1383 use overload '""' => sub {"CLiK KLAK"};
1384
1385 package Ksshfwoom;
2372186a
NC
1386
1387 package main;
1388
1389 my ($obj, $ref);
1390 $obj = bless do {my $a; \$a}, 'Shklitza';
1391 $ref = $obj;
1392
ea940d6b
CBW
1393 is ("$obj", "CLiK KLAK");
1394 is ("$ref", "CLiK KLAK");
2372186a
NC
1395
1396 weaken $ref;
ea940d6b 1397 is ("$ref", "CLiK KLAK");
2372186a
NC
1398
1399 bless $obj, 'Ksshfwoom';
1400
cd75d542
NC
1401 like ($obj, qr/^Ksshfwoom=/);
1402 like ($ref, qr/^Ksshfwoom=/);
2372186a
NC
1403
1404 undef $obj;
1405 is ($ref, undef);
1406}
6dd85743
AF
1407
1408{
1409 package bit;
1410 # bit operations have overloadable assignment variants too
1411
1412 sub new { bless \$_[1], $_[0] }
1413
1414 use overload
1415 "&=" => sub { bit->new($_[0]->val . ' & ' . $_[1]->val) },
1416 "^=" => sub { bit->new($_[0]->val . ' ^ ' . $_[1]->val) },
1417 "|" => sub { bit->new($_[0]->val . ' | ' . $_[1]->val) }, # |= by fallback
1418 ;
1419
1420 sub val { ${$_[0]} }
1421
1422 package main;
1423
1424 my $a = bit->new(my $va = 'a');
1425 my $b = bit->new(my $vb = 'b');
1426
1427 $a &= $b;
1428 is($a->val, 'a & b', "overloaded &= works");
1429
1430 my $c = bit->new(my $vc = 'c');
1431
1432 $b ^= $c;
1433 is($b->val, 'b ^ c', "overloaded ^= works");
1434
1435 my $d = bit->new(my $vd = 'd');
1436
1437 $c |= $d;
1438 is($c->val, 'c | d', "overloaded |= (by fallback) works");
1439}
d11ee47c
RD
1440
1441{
2ab54efd 1442 # comparison operators with nomethod (bug 41546)
d11ee47c
RD
1443 my $warning = "";
1444 my $method;
1445
1446 package nomethod_false;
1447 use overload nomethod => sub { $method = 'nomethod'; 0 };
1448
1449 package nomethod_true;
1450 use overload nomethod => sub { $method= 'nomethod'; 'true' };
1451
1452 package main;
1453 local $^W = 1;
1454 local $SIG{__WARN__} = sub { $warning = $_[0] };
1455
1456 my $f = bless [], 'nomethod_false';
1457 ($warning, $method) = ("", "");
1458 is($f eq 'whatever', 0, 'nomethod makes eq return 0');
1459 is($method, 'nomethod');
1460
1461 my $t = bless [], 'nomethod_true';
1462 ($warning, $method) = ("", "");
1463 is($t eq 'whatever', 'true', 'nomethod makes eq return "true"');
1464 is($method, 'nomethod');
1465 is($warning, "", 'nomethod eq need not return number');
1466
1467 eval q{
1468 package nomethod_false;
1469 use overload cmp => sub { $method = 'cmp'; 0 };
1470 };
1471 $f = bless [], 'nomethod_false';
1472 ($warning, $method) = ("", "");
1473 ok($f eq 'whatever', 'eq falls back to cmp (nomethod not called)');
1474 is($method, 'cmp');
1475
1476 eval q{
1477 package nomethod_true;
1478 use overload cmp => sub { $method = 'cmp'; 'true' };
1479 };
1480 $t = bless [], 'nomethod_true';
1481 ($warning, $method) = ("", "");
1482 ok($t eq 'whatever', 'eq falls back to cmp (nomethod not called)');
1483 is($method, 'cmp');
1484 like($warning, qr/isn't numeric/, 'cmp should return number');
1485
1486}
2c615c57
NC
1487
1488{
2ab54efd
MB
1489 # nomethod called for '!' after attempted fallback
1490 my $nomethod_called = 0;
1491
1492 package nomethod_not;
1493 use overload nomethod => sub { $nomethod_called = 'yes'; };
1494
1495 package main;
1496 my $o = bless [], 'nomethod_not';
1497 my $res = ! $o;
1498
1499 is($nomethod_called, 'yes', "nomethod() is called for '!'");
1500 is($res, 'yes', "nomethod(..., '!') return value propagates");
1501}
1502
1503{
2c615c57 1504 # Subtle bug pre 5.10, as a side effect of the overloading flag being
b0bf6df7 1505 # stored on the reference rather than the referent. Despite the fact that
2c615c57 1506 # objects can only be accessed via references (even internally), the
b0bf6df7 1507 # referent actually knows that it's blessed, not the references. So taking
2c615c57
NC
1508 # a new, unrelated, reference to it gives an object. However, the
1509 # overloading-or-not flag was on the reference prior to 5.10, and taking
1510 # a new reference didn't (use to) copy it.
1511
1512 package kayo;
1513
1514 use overload '""' => sub {${$_[0]}};
1515
1516 sub Pie {
1517 return "$_[0], $_[1]";
1518 }
1519
1520 package main;
1521
1522 my $class = 'kayo';
1523 my $string = 'bam';
1524 my $crunch_eth = bless \$string, $class;
1525
1526 is("$crunch_eth", $string);
1527 is ($crunch_eth->Pie("Meat"), "$string, Meat");
1528
1529 my $wham_eth = \$string;
1530
1531 is("$wham_eth", $string,
1532 'This reference did not have overloading in 5.8.8 and earlier');
1533 is ($crunch_eth->Pie("Apple"), "$string, Apple");
1534
1535 my $class = ref $wham_eth;
1536 $class =~ s/=.*//;
1537
1538 # Bless it back into its own class!
1539 bless $wham_eth, $class;
1540
1541 is("$wham_eth", $string);
1542 is ($crunch_eth->Pie("Blackbird"), "$string, Blackbird");
1543}
c781a409
RD
1544
1545{
1546 package numify_int;
1547 use overload "0+" => sub { $_[0][0] += 1; 42 };
1548 package numify_self;
1549 use overload "0+" => sub { $_[0][0]++; $_[0] };
1550 package numify_other;
1551 use overload "0+" => sub { $_[0][0]++; $_[0][1] = bless [], 'numify_int' };
e28bb1d5 1552 package numify_by_fallback;
800401ee 1553 use overload fallback => 1;
c781a409
RD
1554
1555 package main;
1556 my $o = bless [], 'numify_int';
1557 is(int($o), 42, 'numifies to integer');
1558 is($o->[0], 1, 'int() numifies only once');
1559
1560 my $aref = [];
93521010 1561 my $num_val = int($aref);
c781a409
RD
1562 my $r = bless $aref, 'numify_self';
1563 is(int($r), $num_val, 'numifies to self');
1564 is($r->[0], 1, 'int() numifies once when returning self');
1565
1566 my $s = bless [], 'numify_other';
1567 is(int($s), 42, 'numifies to numification of other object');
1568 is($s->[0], 1, 'int() numifies once when returning other object');
1569 is($s->[1][0], 1, 'returned object numifies too');
e28bb1d5
RD
1570
1571 my $m = bless $aref, 'numify_by_fallback';
1572 is(int($m), $num_val, 'numifies to usual reference value');
800401ee
JH
1573 is(abs($m), $num_val, 'numifies to usual reference value');
1574 is(-$m, -$num_val, 'numifies to usual reference value');
1575 is(0+$m, $num_val, 'numifies to usual reference value');
1576 is($m+0, $num_val, 'numifies to usual reference value');
1577 is($m+$m, 2*$num_val, 'numifies to usual reference value');
1578 is(0-$m, -$num_val, 'numifies to usual reference value');
1579 is(1*$m, $num_val, 'numifies to usual reference value');
9fa8ecf2 1580 is(int($m/1), $num_val, 'numifies to usual reference value');
800401ee
JH
1581 is($m%100, $num_val%100, 'numifies to usual reference value');
1582 is($m**1, $num_val, 'numifies to usual reference value');
1583
1584 is(abs($aref), $num_val, 'abs() of ref');
1585 is(-$aref, -$num_val, 'negative of ref');
1586 is(0+$aref, $num_val, 'ref addition');
1587 is($aref+0, $num_val, 'ref addition');
1588 is($aref+$aref, 2*$num_val, 'ref addition');
1589 is(0-$aref, -$num_val, 'subtraction of ref');
1590 is(1*$aref, $num_val, 'multiplicaton of ref');
9fa8ecf2 1591 is(int($aref/1), $num_val, 'division of ref');
800401ee
JH
1592 is($aref%100, $num_val%100, 'modulo of ref');
1593 is($aref**1, $num_val, 'exponentiation of ref');
c781a409 1594}
800401ee 1595
49c95d58
RD
1596{
1597 package CopyConstructorFallback;
1598 use overload
1599 '++' => sub { "$_[0]"; $_[0] },
1600 fallback => 1;
1601 sub new { bless {} => shift }
1602
1603 package main;
1604
1605 my $o = CopyConstructorFallback->new;
1606 my $x = $o++; # would segfault
1607 my $y = ++$o;
1608 is($x, $o, "copy constructor falls back to assignment (postinc)");
1609 is($y, $o, "copy constructor falls back to assignment (preinc)");
1610}
1611
6f1401dc
DM
1612# only scalar 'x' should currently overload
1613
1614{
1615 package REPEAT;
1616
1617 my ($x,$n, $nm);
1618
1619 use overload
1620 'x' => sub { $x++; 1 },
1621 '0+' => sub { $n++; 1 },
1622 'nomethod' => sub { $nm++; 1 },
1623 'fallback' => 0,
1624 ;
1625
1626 my $s = bless {};
1627
1628 package main;
1629
1630 my @a;
1631 my $count = 3;
1632
1633 ($x,$n,$nm) = (0,0,0);
1634 @a = ((1,2,$s) x $count);
1635 is("$x-$n-$nm", "0-0-0", 'repeat 1');
1636
1637 ($x,$n,$nm) = (0,0,0);
1638 @a = ((1,$s,3) x $count);
1639 is("$x-$n-$nm", "0-0-0", 'repeat 2');
1640
1641 ($x,$n,$nm) = (0,0,0);
1642 @a = ((1,2,3) x $s);
1643 is("$x-$n-$nm", "0-1-0", 'repeat 3');
1644}
1645
1646
1647
1648# RT #57012: magic items need to have mg_get() called before testing for
1649# overload. Lack of this means that overloaded values returned by eg a
1650# tied array didn't call overload methods.
1651# We test here both a tied array and scalar, since the implementation of
1652# tied arrays (and hashes) is such that in rvalue context, mg_get is
1653# called prior to executing the op, while it isn't for a tied scalar.
a02ec77a
DM
1654# We also check that return values are correctly tainted.
1655# We try against two overload packages; one has all expected methods, the
1656# other uses only fallback methods.
6f1401dc
DM
1657
1658{
1659
a02ec77a
DM
1660 # @tests holds a list of test cases. Each elem is an array ref with
1661 # the following entries:
1662 #
1663 # * the value that the overload method should return
1664 #
1665 # * the expression to be evaled. %s is replaced with the
1666 # variable being tested ($ta[0], $ts, or $plain)
1667 #
1668 # * a string listing what functions we expect to be called.
1669 # Each method appends its name in parentheses, so "(=)(+)" means
1670 # we expect the copy constructor and then the add method to be
1671 # called.
1672 #
1673 # * like above, but what should be called for the fallback-only test
1674 # (in this case, nomethod() identifies itself as "(NM:*)" where *
1675 # is the op). If this value is undef, fallback tests are skipped.
1676 #
1677 # * An array ref of expected counts of calls to FETCH/STORE.
1678 # The first three values are:
1679 # 1. the expected number of FETCHs for a tied array
1680 # 2. the expected number of FETCHs for a tied scalar
1681 # 3. the expected number of STOREs
1682 # If there are a further three elements present, then
1683 # these represent the expected counts for the fallback
1684 # version of the tests. If absent, they are assumed to
1685 # be the same as for the full method test
1686 #
1687 # * Under the taint version of the tests, whether we expect
1688 # the result to be tainted (for example comparison ops
1689 # like '==' don't return a tainted value, even if their
1690 # args are.
1691 my @tests;
1692
6f1401dc
DM
1693 my %subs;
1694 my $funcs;
1695 my $use_int;
1696
1697 BEGIN {
1698 # A note on what methods to expect to be called, and
1699 # how many times FETCH/STORE is called:
1700 #
1701 # Mutating ops (+=, ++ etc) trigger a copy ('='), since
7f1e438c 1702 # the code can't distinguish between something that's been copied:
6f1401dc
DM
1703 # $a = foo->new(0); $b = $a; refcnt($$b) == 2
1704 # and overloaded objects stored in ties which will have extra
1705 # refcounts due to the tied_obj magic and entries on the tmps
1706 # stack when returning from FETCH etc. So we always copy.
1707
1708 # This accounts for a '=', and an extra STORE.
1709 # We also have a FETCH returning the final value from the eval,
1710 # plus a FETCH in the overload subs themselves: ($_[0][0])
7f1e438c 1711 # triggers one. However, tied aggregates have a mechanism to prevent
6f1401dc
DM
1712 # multiple fetches between STOREs, which means that the tied
1713 # hash skips doing a FETCH during '='.
1714
a02ec77a
DM
1715 for (qw(+ - * / % ** << >> & | ^)) {
1716 my $op = $_;
1717 $op = '%%' if $op eq '%';
1718 my $e = "%s $op= 3";
6f1401dc
DM
1719 $subs{"$_="} = $e;
1720 # ARRAY FETCH: initial, sub+=, eval-return,
1721 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1722 # STORE: copy, mutator
a02ec77a
DM
1723 push @tests, [ 18, $e, "(=)($_=)", "(=)(NM:$_=)", [ 3, 4, 2 ], 1 ];
1724
1725 $subs{$_} =
1726 "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }";
6f1401dc
DM
1727 # ARRAY FETCH: initial
1728 # SCALAR FETCH: initial eval-return,
a02ec77a
DM
1729 push @tests, [ 18, "%s $op 3", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
1730 push @tests, [ 18, "3 $op %s", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc 1731 }
a02ec77a
DM
1732
1733 # these use string fallback rather than nomethod
1734 for (qw(x .)) {
1735 my $op = $_;
1736 my $e = "%s $op= 3";
1737 $subs{"$_="} = $e;
1738 # For normal case:
1739 # ARRAY FETCH: initial, sub+=, eval-return,
1740 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1741 # STORE: copy, mutator
1742 # for fallback, we just stringify, so eval-return and copy skipped
c5aa2872
DM
1743
1744 push @tests, [ 18, $e, "(=)($_=)", '("")',
1745 [ 3, 4, 2, 2, 3, 1 ], 1 ];
a02ec77a
DM
1746
1747 $subs{$_} =
1748 "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }";
1749 # ARRAY FETCH: initial
1750 # SCALAR FETCH: initial eval-return,
3bc4ee4c
DM
1751 # with fallback, we just stringify, so eval-return skipped,
1752 # but an extra FETCH happens in sub"", except for 'x',
1753 # which passes a copy of the RV to sub"", avoiding the
1754 # second FETCH
1755
1756 push @tests, [ 18, "%s $op 3", "($_)", '("")',
1757 [ 1, 2, 0, 1, ($_ eq '.' ? 2 : 1), 0 ], 1 ];
1758 next if $_ eq 'x'; # repeat only overloads on LHS
1759 push @tests, [ 18, "3 $op %s", "($_)", '("")',
1760 [ 1, 2, 0, 1, 2, 0 ], 1 ];
a02ec77a
DM
1761 }
1762
6f1401dc
DM
1763 for (qw(++ --)) {
1764 my $pre = "$_%s";
1765 my $post = "%s$_";
1766 $subs{$_} = $pre;
a02ec77a 1767 push @tests,
6f1401dc
DM
1768 # ARRAY FETCH: initial, sub+=, eval-return,
1769 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1770 # STORE: copy, mutator
a02ec77a 1771 [ 18, $pre, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 3, 4, 2 ], 1 ],
6f1401dc
DM
1772 # ARRAY FETCH: initial, sub+=
1773 # SCALAR FETCH: initial, sub=, sub+=
1774 # STORE: copy, mutator
a02ec77a 1775 [ 18, $post, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 2, 3, 2 ], 1 ];
6f1401dc
DM
1776 }
1777
1778 # For the non-mutator ops, we have a initial FETCH,
1779 # an extra FETCH within the sub itself for the scalar option,
1780 # and no STOREs
1781
a02ec77a 1782 for (qw(< <= > >= == != lt le gt ge eq ne)) {
6f1401dc
DM
1783 my $e = "%s $_ 3";
1784 $subs{$_} = $e;
a02ec77a
DM
1785 push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 0 ];
1786 }
1787 for (qw(<=> cmp)) {
1788 my $e = "%s $_ 3";
1789 $subs{$_} = $e;
1790 push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc
DM
1791 }
1792 for (qw(atan2)) {
1793 my $e = "$_ %s, 3";
1794 $subs{$_} = $e;
a02ec77a 1795 push @tests, [ 18, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc 1796 }
a02ec77a 1797 for (qw(cos sin exp abs log sqrt int ~)) {
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DM
1798 my $e = "$_(%s)";
1799 $subs{$_} = $e;
a02ec77a
DM
1800 push @tests, [ 1.23, $e, "($_)",
1801 ($_ eq 'int' ? '(0+)' : "(NM:$_)") , [ 1, 2, 0 ], 1 ];
1802 }
1803 for (qw(!)) {
1804 my $e = "$_(%s)";
1805 $subs{$_} = $e;
1806 push @tests, [ 1.23, $e, "($_)", '(0+)', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1807 }
1808 for (qw(-)) {
1809 my $e = "$_(%s)";
1810 $subs{neg} = $e;
a02ec77a 1811 push @tests, [ 18, $e, '(neg)', '(NM:neg)', [ 1, 2, 0 ], 1 ];
6f1401dc
DM
1812 }
1813 my $e = '(%s) ? 1 : 0';
1814 $subs{bool} = $e;
a02ec77a 1815 push @tests, [ 18, $e, '(bool)', '(0+)', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1816
1817 # note: this is testing unary qr, not binary =~
a02ec77a 1818 $subs{qr} = '(qr/%s/)';
f3ec07c7 1819 push @tests, [ "abc", '"abc" =~ (%s)', '(qr)', '("")', [ 1, 2, 0 ], 0 ];
540576b3
FC
1820 push @tests, [ chr 256, 'chr(256) =~ (%s)', '(qr)', '("")',
1821 [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1822
1823 $e = '"abc" ~~ (%s)';
1824 $subs{'~~'} = $e;
a02ec77a 1825 push @tests, [ "abc", $e, '(~~)', '(NM:~~)', [ 1, 1, 0 ], 0 ];
6f1401dc
DM
1826
1827 $subs{'-X'} = 'do { my $f = (%s);'
1828 . '$_[1] eq "r" ? (-r ($f)) :'
1829 . '$_[1] eq "e" ? (-e ($f)) :'
1830 . '$_[1] eq "f" ? (-f ($f)) :'
1831 . '$_[1] eq "l" ? (-l ($f)) :'
1832 . '$_[1] eq "t" ? (-t ($f)) :'
1833 . '$_[1] eq "T" ? (-T ($f)) : 0;}';
7f1e438c 1834 # Note - we don't care what these file tests return, as
6f1401dc
DM
1835 # long as the tied and untied versions return the same value.
1836 # The flags below are chosen to test all uses of tryAMAGICftest_MG
1837 for (qw(r e f l t T)) {
40c852de 1838 push @tests, [ 'TEST', "-$_ (%s)", '(-X)', '("")', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1839 }
1840
1841 $subs{'${}'} = '%s';
a02ec77a 1842 push @tests, [ do {my $s=99; \$s}, '${%s}', '(${})', undef, [ 1, 1, 0 ], 0 ];
6f1401dc
DM
1843
1844 # we skip testing '@{}' here because too much of this test
a02ec77a 1845 # framework involves array dereferences!
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DM
1846
1847 $subs{'%{}'} = '%s';
a02ec77a 1848 push @tests, [ {qw(a 1 b 2 c 3)}, 'join "", sort keys %%{%s}',
9026059d 1849 '(%{})', undef, [ 1, 1, 0 ], 0 ];
6f1401dc
DM
1850
1851 $subs{'&{}'} = '%s';
a02ec77a
DM
1852 push @tests, [ sub {99}, 'do {&{%s} for 1,2}',
1853 '(&{})(&{})', undef, [ 2, 2, 0 ], 0 ];
6f1401dc
DM
1854
1855 our $RT57012A = 88;
1856 our $RT57012B;
1857 $subs{'*{}'} = '%s';
a02ec77a
DM
1858 push @tests, [ \*RT57012A, '*RT57012B = *{%s}; our $RT57012B',
1859 '(*{})', undef, [ 1, 1, 0 ], 0 ];
6f1401dc 1860
9426e1a5
DM
1861 my $iter_text = ("some random text\n" x 100) . $^X;
1862 open my $iter_fh, '<', \$iter_text
1863 or die "open of \$iter_text gave ($!)\n";
1864 $subs{'<>'} = '<$iter_fh>';
1865 push @tests, [ $iter_fh, '<%s>', '(<>)', undef, [ 1, 1, 0 ], 1 ];
bb4f579a
DM
1866 push @tests, [ $iter_fh,
1867 'local *CORE::GLOBAL::glob = sub {}; eval q|<%s>|',
1868 '(<>)', undef, [ 1, 1, 0 ], 1 ];
6f1401dc 1869
895b760f
DM
1870 # eval should do tie, overload on its arg before checking taint */
1871 push @tests, [ '1;', 'eval q(eval %s); $@ =~ /Insecure/',
1872 '("")', '("")', [ 1, 2, 0 ], 0 ];
1873
1874
6f1401dc
DM
1875 for my $sub (keys %subs) {
1876 my $term = $subs{$sub};
1877 my $t = sprintf $term, '$_[0][0]';
a02ec77a 1878 my $e ="sub { \$funcs .= '($sub)'; my \$r; if (\$use_int) {"
6f1401dc 1879 . "use integer; \$r = ($t) } else { \$r = ($t) } \$r }";
a02ec77a
DM
1880 $subs{$sub} = eval $e;
1881 die "Compiling sub gave error:\n<$e>\n<$@>\n" if $@;
6f1401dc
DM
1882 }
1883 }
1884
1885 my $fetches;
1886 my $stores;
1887
1888 package RT57012_OV;
1889
6f1401dc
DM
1890 use overload
1891 %subs,
a02ec77a
DM
1892 "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] },
1893 '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] },
1894 '""' => sub { $funcs .= '("")'; "$_[0][0]" },
1895 ;
1896
1897 package RT57012_OV_FB; # only contains fallback conversion functions
1898
1899 use overload
1900 "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] },
1901 '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] },
1902 '""' => sub { $funcs .= '("")'; "$_[0][0]" },
1903 "nomethod" => sub {
1904 $funcs .= "(NM:$_[3])";
1905 my $e = defined($_[1])
1906 ? $_[3] eq 'atan2'
1907 ? $_[2]
1908 ? "atan2(\$_[1],\$_[0][0])"
1909 : "atan2(\$_[0][0],\$_[1])"
1910 : $_[2]
1911 ? "\$_[1] $_[3] \$_[0][0]"
1912 : "\$_[0][0] $_[3] \$_[1]"
1913 : $_[3] eq 'neg'
1914 ? "-\$_[0][0]"
1915 : "$_[3](\$_[0][0])";
1916 my $r;
1917 if ($use_int) {
1918 use integer; $r = eval $e;
1919 }
1920 else {
1921 $r = eval $e;
1922 }
1923 ::diag("eval of nomethod <$e> gave <$@>") if $@;
1924 $r;
1925 }
1926
6f1401dc
DM
1927 ;
1928
1929 package RT57012_TIE_S;
1930
1931 my $tie_val;
a02ec77a 1932 sub TIESCALAR { bless [ bless [ $tie_val ], $_[1] ] }
6f1401dc
DM
1933 sub FETCH { $fetches++; $_[0][0] }
1934 sub STORE { $stores++; $_[0][0] = $_[1] }
1935
1936 package RT57012_TIE_A;
1937
1938 sub TIEARRAY { bless [] }
1939 sub FETCH { $fetches++; $_[0][0] }
1940 sub STORE { $stores++; $_[0][$_[1]] = $_[2] }
1941
1942 package main;
1943
a02ec77a
DM
1944 for my $test (@tests) {
1945 my ($val, $sub_term, $exp_funcs, $exp_fb_funcs,
1946 $exp_counts, $exp_taint) = @$test;
1947
1948 my $tainted_val;
1949 {
1950 # create tainted version of $val (unless its a ref)
1951 my $t = substr($^X,0,0);
1952 my $t0 = $t."0";
1953 my $val1 = $val; # use a copy to avoid stringifying original
1954 $tainted_val = ref($val1) ? $val :
1955 ($val1 =~ /^[\d\.]+$/) ? $val+$t0 : $val.$t;
1956 }
1957 $tie_val = $tainted_val;
6f1401dc 1958
6f1401dc
DM
1959 for my $int ('', 'use integer; ') {
1960 $use_int = ($int ne '');
a02ec77a
DM
1961 my $plain = $tainted_val;
1962 my $plain_term = $int . sprintf $sub_term, '$plain';
1963 my $exp = eval $plain_term;
1964 diag("eval of plain_term <$plain_term> gave <$@>") if $@;
1965 is(tainted($exp), $exp_taint,
1966 "<$plain_term> taint of expected return");
1967
1968 for my $ov_pkg (qw(RT57012_OV RT57012_OV_FB)) {
a02ec77a
DM
1969 next if $ov_pkg eq 'RT57012_OV_FB'
1970 and not defined $exp_fb_funcs;
1971 my ($exp_fetch_a, $exp_fetch_s, $exp_store) =
1972 ($ov_pkg eq 'RT57012_OV' || @$exp_counts < 4)
1973 ? @$exp_counts[0,1,2]
1974 : @$exp_counts[3,4,5];
1975
1976 tie my $ts, 'RT57012_TIE_S', $ov_pkg;
6f1401dc 1977 tie my @ta, 'RT57012_TIE_A';
a02ec77a
DM
1978 $ta[0] = bless [ $tainted_val ], $ov_pkg;
1979 my $oload = bless [ $tainted_val ], $ov_pkg;
1980
9426e1a5
DM
1981 for my $var ('$ta[0]', '$ts', '$oload',
1982 ($sub_term eq '<%s>' ? '${ts}' : ())
1983 ) {
a02ec77a
DM
1984
1985 $funcs = '';
1986 $fetches = 0;
1987 $stores = 0;
1988
1989 my $res_term = $int . sprintf $sub_term, $var;
1990 my $desc = "<$res_term> $ov_pkg" ;
1991 my $res = eval $res_term;
1992 diag("eval of res_term $desc gave <$@>") if $@;
7f1e438c 1993 # uniquely, the inc/dec ops return the original
a02ec77a
DM
1994 # ref rather than a copy, so stringify it to
1995 # find out if its tainted
1996 $res = "$res" if $res_term =~ /\+\+|--/;
1997 is(tainted($res), $exp_taint,
1998 "$desc taint of result return");
a02ec77a
DM
1999 is($res, $exp, "$desc return value");
2000 my $fns =($ov_pkg eq 'RT57012_OV_FB')
2001 ? $exp_fb_funcs : $exp_funcs;
2002 if ($var eq '$oload' && $res_term !~ /oload(\+\+|--)/) {
2003 # non-tied overloading doesn't trigger a copy
2004 # except for post inc/dec
2005 $fns =~ s/^\(=\)//;
2006 }
2007 is($funcs, $fns, "$desc methods called");
2008 next if $var eq '$oload';
2009 my $exp_fetch = ($var eq '$ts') ?
2010 $exp_fetch_s : $exp_fetch_a;
2011 is($fetches, $exp_fetch, "$desc FETCH count");
2012 is($stores, $exp_store, "$desc STORE count");
2013
2014 }
2015
6f1401dc
DM
2016 }
2017 }
2018 }
2019}
2020
25222ff9
FC
2021# Test overload from the main package
2022fresh_perl_is
2023 '$^W = 1; use overload q\""\ => sub {"ning"}; print bless []',
2024 'ning',
2025 { switches => ['-wl'], stderr => 1 },
2026 'use overload from the main package'
2027;
2028
56f08af2
FC
2029{
2030 package blessed_methods;
2031 use overload '+' => sub {};
2032 bless overload::Method __PACKAGE__,'+';
2033 eval { overload::Method __PACKAGE__,'+' };
2034 ::is($@, '', 'overload::Method and blessed overload methods');
2035}
2036
bf5522a1
MB
2037{
2038 # fallback to 'cmp' and '<=>' with heterogeneous operands
2039 # [perl #71286]
2040 my $not_found = 'no method found';
2041 my $used = 0;
2042 package CmpBase;
2043 sub new {
2044 my $n = $_[1] || 0;
2045 bless \$n, ref $_[0] || $_[0];
2046 }
2047 sub cmp {
2048 $used = \$_[0];
2049 (${$_[0]} <=> ${$_[1]}) * ($_[2] ? -1 : 1);
2050 }
2051
2052 package NCmp;
2053 use base 'CmpBase';
2054 use overload '<=>' => 'cmp';
2055
2056 package SCmp;
2057 use base 'CmpBase';
2058 use overload 'cmp' => 'cmp';
2059
2060 package main;
2061 my $n = NCmp->new(5);
2062 my $s = SCmp->new(3);
2063 my $res;
2064
2065 eval { $res = $n > $s; };
2066 $res = $not_found if $@ =~ /$not_found/;
2067 is($res, 1, 'A>B using A<=> when B overloaded, no B<=>');
2068
2069 eval { $res = $s < $n; };
2070 $res = $not_found if $@ =~ /$not_found/;
2071 is($res, 1, 'A<B using B<=> when A overloaded, no A<=>');
2072
2073 eval { $res = $s lt $n; };
2074 $res = $not_found if $@ =~ /$not_found/;
2075 is($res, 1, 'A lt B using A:cmp when B overloaded, no B:cmp');
2076
2077 eval { $res = $n gt $s; };
2078 $res = $not_found if $@ =~ /$not_found/;
2079 is($res, 1, 'A gt B using B:cmp when A overloaded, no A:cmp');
2080
2081 my $o = NCmp->new(9);
2082 $res = $n < $o;
2083 is($used, \$n, 'A < B uses <=> from A in preference to B');
2084
2085 my $t = SCmp->new(7);
2086 $res = $s lt $t;
2087 is($used, \$s, 'A lt B uses cmp from A in preference to B');
2088}
2089
2090{
2091 # Combinatorial testing of 'fallback' and 'nomethod'
2092 # [perl #71286]
2093 package NuMB;
2094 use overload '0+' => sub { ${$_[0]}; },
2095 '""' => 'str';
2096 sub new {
2097 my $self = shift;
2098 my $n = @_ ? shift : 0;
2099 bless my $obj = \$n, ref $self || $self;
2100 }
2101 sub str {
2102 no strict qw/refs/;
2103 my $s = "(${$_[0]} ";
2104 $s .= "nomethod, " if defined ${ref($_[0]).'::(nomethod'};
2105 my $fb = ${ref($_[0]).'::()'};
2106 $s .= "fb=" . (defined $fb ? 0 + $fb : 'undef') . ")";
2107 }
2108 sub nomethod { "${$_[0]}.nomethod"; }
2109
2110 # create classes for tests
2111 package main;
2112 my @falls = (0, 'undef', 1);
2113 my @nomethods = ('', 'nomethod');
2114 my $not_found = 'no method found';
2115 for my $fall (@falls) {
2116 for my $nomethod (@nomethods) {
2117 my $nomethod_decl = $nomethod
2118 ? $nomethod . "=>'nomethod'," : '';
2119 eval qq{
2120 package NuMB$fall$nomethod;
2121 use base qw/NuMB/;
2122 use overload $nomethod_decl
2123 fallback => $fall;
2124 };
2125 }
2126 }
2127
2128 # operation and precedence of 'fallback' and 'nomethod'
2129 # for all combinations with 2 overloaded operands
2130 for my $nomethod2 (@nomethods) {
2131 for my $nomethod1 (@nomethods) {
2132 for my $fall2 (@falls) {
2133 my $pack2 = "NuMB$fall2$nomethod2";
2134 for my $fall1 (@falls) {
2135 my $pack1 = "NuMB$fall1$nomethod1";
2136 my ($test, $out, $exp);
2137 eval qq{
2138 my \$x = $pack1->new(2);
2139 my \$y = $pack2->new(3);
2140 \$test = "\$x" . ' * ' . "\$y";
2141 \$out = \$x * \$y;
2142 };
2143 $out = $not_found if $@ =~ /$not_found/;
2144 $exp = $nomethod1 ? '2.nomethod' :
2145 $nomethod2 ? '3.nomethod' :
2146 $fall1 eq '1' && $fall2 eq '1' ? 6
2147 : $not_found;
2148 is($out, $exp, "$test --> $exp");
2149 }
2150 }
2151 }
2152 }
2153
2154 # operation of 'fallback' and 'nomethod'
2155 # where the other operand is not overloaded
2156 for my $nomethod (@nomethods) {
2157 for my $fall (@falls) {
2158 my ($test, $out, $exp);
2159 eval qq{
2160 my \$x = NuMB$fall$nomethod->new(2);
2161 \$test = "\$x" . ' * 3';
2162 \$out = \$x * 3;
2163 };
2164 $out = $not_found if $@ =~ /$not_found/;
2165 $exp = $nomethod ? '2.nomethod' :
2166 $fall eq '1' ? 6
2167 : $not_found;
2168 is($out, $exp, "$test --> $exp");
2169
2170 eval qq{
2171 my \$x = NuMB$fall$nomethod->new(2);
2172 \$test = '3 * ' . "\$x";
2173 \$out = 3 * \$x;
2174 };
2175 $out = $not_found if $@ =~ /$not_found/;
2176 is($out, $exp, "$test --> $exp");
2177 }
2178 }
2179}
2180
bff33ce0
DM
2181# since 5.6 overloaded <> was leaving an extra arg on the stack!
2182
2183{
2184 package Iter1;
2185 use overload '<>' => sub { 11 };
2186 package main;
2187 my $a = bless [], 'Iter1';
2188 my $x;
2189 my @a = (10, ($x = <$a>), 12);
2190 is ($a[0], 10, 'Iter1: a[0]');
2191 is ($a[1], 11, 'Iter1: a[1]');
2192 is ($a[2], 12, 'Iter1: a[2]');
2193 @a = (10, ($x .= <$a>), 12);
2194 is ($a[0], 10, 'Iter1: a[0] concat');
2195 is ($a[1], 1111, 'Iter1: a[1] concat');
2196 is ($a[2], 12, 'Iter1: a[2] concat');
2197}
bf5522a1 2198
5e2699c2
FC
2199# Some tests for error messages
2200{
2201 package Justus;
2202 use overload '+' => 'justice';
bb4f579a 2203 eval {"".bless[]};
5e2699c2 2204 ::like $@, qr/^Can't resolve method "justice" overloading "\+" in p(?x:
f0e9f182 2205 )ackage "Justus" at /,
5e2699c2
FC
2206 'Error message when explicitly named overload method does not exist';
2207
2208 package JustUs;
2209 our @ISA = 'JustYou';
2210 package JustYou { use overload '+' => 'injustice'; }
2211 "JustUs"->${\"(+"};
bb4f579a 2212 eval {"".bless []};
5e2699c2 2213 ::like $@, qr/^Stub found while resolving method "\?{3}" overloadin(?x:
f0e9f182 2214 )g "\+" in package "JustUs" at /,
5e2699c2
FC
2215 'Error message when sub stub is encountered';
2216}
bf5522a1 2217
c4b0eb7f
DM
2218{
2219 # check that the right number of stringifications
2220 # and the correct un-utf8-ifying happen on regex compile
2221 package utf8_match;
2222 my $c;
2223 use overload '""' => sub { $c++; $_[0][0] ? "^\x{100}\$" : "^A\$"; };
2224 my $o = bless [0], 'utf8_match';
2225
2226 $o->[0] = 0;
2227 $c = 0;
2228 ::ok("A" =~ "^A\$", "regex stringify utf8=0 ol=0 bytes=0");
2229 ::ok("A" =~ $o, "regex stringify utf8=0 ol=1 bytes=0");
2230 ::is($c, 1, "regex stringify utf8=0 ol=1 bytes=0 count");
2231
2232 $o->[0] = 1;
2233 $c = 0;
2234 ::ok("\x{100}" =~ "^\x{100}\$",
2235 "regex stringify utf8=1 ol=0 bytes=0");
2236 ::ok("\x{100}" =~ $o, "regex stringify utf8=1 ol=1 bytes=0");
2237 ::is($c, 1, "regex stringify utf8=1 ol=1 bytes=0 count");
2238
2239 use bytes;
2240
2241 $o->[0] = 0;
2242 $c = 0;
2243 ::ok("A" =~ "^A\$", "regex stringify utf8=0 ol=0 bytes=1");
2244 ::ok("A" =~ $o, "regex stringify utf8=0 ol=1 bytes=1");
2245 ::is($c, 1, "regex stringify utf8=0 ol=1 bytes=1 count");
2246
2247 $o->[0] = 1;
2248 $c = 0;
2249 ::ok("\xc4\x80" =~ "^\x{100}\$",
2250 "regex stringify utf8=1 ol=0 bytes=1");
2251 ::ok("\xc4\x80" =~ $o, "regex stringify utf8=1 ol=1 bytes=1");
2252 ::is($c, 1, "regex stringify utf8=1 ol=1 bytes=1 count");
2253
2254
2255}
2256
d4a6f307
DM
2257# [perl #40333]
2258# overload::Overloaded should not use a ->can designed for autoloading.
2259# This example attempts to be as realistic as possible. The o class has a
2260# default singleton object, but can have instances, too. The proxy class
2261# represents proxies for o objects, but class methods delegate to the
2262# singleton.
2263# overload::Overloaded used to return incorrect results for proxy objects.
2264package proxy {
2265 sub new { bless [$_[1]], $_[0] }
2266 sub AUTOLOAD {
2267 our $AUTOLOAD =~ s/.*:://;
2268 &_self->$AUTOLOAD;
2269 }
2270 sub can { SUPER::can{@_} || &_self->can($_[1]) }
2271 sub _self { ref $_[0] ? $_[0][0] : $o::singleton }
2272}
2273package o { use overload '""' => sub { 'keck' };
2274 sub new { bless[], $_[0] }
2275 our $singleton = o->new; }
2276ok !overload::Overloaded(new proxy new o),
2277 'overload::Overloaded does not incorrectly return true for proxy classes';
2278
2279# Another test, based on the type of explosive test class for which
2280# perl #40333 was filed.
2281{
2282 package broken_can;
2283 sub can {}
2284 use overload '""' => sub {"Ahoy!"};
2285
2286 package main;
2287 my $obj = bless [], 'broken_can';
2288 ok(overload::Overloaded($obj));
2289}
2290
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DM
2291sub eleventative::cos { 'eleven' }
2292sub twelvetative::abs { 'twelve' }
2293sub thirteentative::abs { 'thirteen' }
2294sub fourteentative::abs { 'fourteen' }
2295@eleventative::ISA = twelvetative::;
2296{
2297 my $o = bless [], 'eleventative';
2298 eval 'package eleventative; use overload map +($_)x2, cos=>abs=>';
2299 is cos $o, 'eleven', 'overloading applies to object blessed before';
2300 bless [], 'eleventative';
2301 is cos $o, 'eleven',
2302 'ovrld applies to previously-blessed obj after other obj is blessed';
2303 $o = bless [], 'eleventative';
2304 *eleventative::cos = sub { 'ten' };
2305 is cos $o, 'ten', 'method changes affect overloading';
2306 @eleventative::ISA = thirteentative::;
2307 is abs $o, 'thirteen', 'isa changes affect overloading';
2308 bless $o, 'fourteentative';
2309 @fourteentative::ISA = 'eleventative';
2310 is abs $o, 'fourteen', 'isa changes can turn overloading on';
2311}
2312
2313# no overload "fallback";
2314{ package phake;
2315 use overload fallback => 1, '""' => sub { 'arakas' };
2316 no overload 'fallback';
2317}
2318$a = bless [], 'phake';
2319is "$a", "arakas",
2320 'no overload "fallback" does not stop overload from working';
2321ok !eval { () = $a eq 'mpizeli'; 1 },
2322 'no overload "fallback" resets fallback to undef on overloaded class';
2323{ package ent; use overload fallback => 0, abs => sub{};
2324 our@ISA = 'huorn';
2325 package huorn;
2326 use overload fallback => 1;
2327 package ent;
2328 no overload "fallback"; # disable previous declaration
2329}
2330$a = bless [], ent::;
2331is eval {"$a"}, overload::StrVal($a),
2332 'no overload undoes fallback declaration completetly'
2333 or diag $@;
2334
2335# inherited fallback
2336{
2337 package pervyy;
2338 our @ISA = 'vtoryy';
2339 use overload "abs" =>=> sub {};
2340 package vtoryy;
2341 use overload fallback => 1, 'sin' =>=> sub{}
2342}
2343$a = bless [], pervyy::;
2344is eval {"$a"}, overload::StrVal($a),
2345 'fallback is inherited by classes that have their own overloading'
2346 or diag $@;
2347
2348# package separators in method names
2349{
2350 package mane;
2351 use overload q\""\ => "bear::strength";
2352 use overload bool => "bear'bouillon";
2353}
2354@bear::ISA = 'food';
2355sub food::strength { 'twine' }
2356sub food::bouillon { 0 }
2357$a = bless[], mane::;
2358is eval { "$a" }, 'twine', ':: in method name' or diag $@;
2359is eval { !$a }, 1, "' in method name" or diag $@;
2360
2361# [perl #113050] Half of CPAN assumes fallback is under "()"
2362{
2363 package dodo;
2364 use overload '+' => sub {};
2365 no strict;
2366 *{"dodo::()"} = sub{};
2367 ${"dodo::()"} = 1;
2368}
2369$a = bless [],'dodo';
2370is eval {"$a"}, overload::StrVal($a), 'fallback is stored under "()"';
2371
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JL
2372# [perl #47119]
2373{
2374 my $context;
2375
2376 {
2377 package Splitter;
2378 use overload '<>' => \&chars;
2379
2380 sub new {
2381 my $class = shift;
2382 my ($string) = @_;
2383 bless \$string, $class;
2384 }
2385
2386 sub chars {
2387 my $self = shift;
2388 my @chars = split //, $$self;
2389 $context = wantarray;
2390 return @chars;
2391 }
2392 }
2393
2394 my $obj = Splitter->new('bar');
2395
2396 $context = 42; # not 1, '', or undef
2397
2398 my @foo = <$obj>;
2399 is($context, 1, "list context (readline list)");
2400 is(scalar(@foo), 3, "correct result (readline list)");
2401 is($foo[0], 'b', "correct result (readline list)");
2402 is($foo[1], 'a', "correct result (readline list)");
2403 is($foo[2], 'r', "correct result (readline list)");
2404
2405 $context = 42;
2406
2407 my $foo = <$obj>;
2408 ok(defined($context), "scalar context (readline scalar)");
2409 is($context, '', "scalar context (readline scalar)");
2410 is($foo, 3, "correct result (readline scalar)");
2411
2412 $context = 42;
2413
2414 <$obj>;
2415 ok(!defined($context), "void context (readline void)");
2416
2417 $context = 42;
2418
2419 my @bar = <${obj}>;
2420 is($context, 1, "list context (glob list)");
2421 is(scalar(@bar), 3, "correct result (glob list)");
2422 is($bar[0], 'b', "correct result (glob list)");
2423 is($bar[1], 'a', "correct result (glob list)");
2424 is($bar[2], 'r', "correct result (glob list)");
2425
2426 $context = 42;
2427
2428 my $bar = <${obj}>;
2429 ok(defined($context), "scalar context (glob scalar)");
2430 is($context, '', "scalar context (glob scalar)");
2431 is($bar, 3, "correct result (glob scalar)");
2432
2433 $context = 42;
2434
2435 <${obj}>;
2436 ok(!defined($context), "void context (glob void)");
2437}
2438{
2439 my $context;
2440
2441 {
2442 package StringWithContext;
2443 use overload '""' => \&stringify;
2444
2445 sub new {
2446 my $class = shift;
2447 my ($string) = @_;
2448 bless \$string, $class;
2449 }
2450
2451 sub stringify {
2452 my $self = shift;
2453 $context = wantarray;
2454 return $$self;
2455 }
2456 }
2457
2458 my $obj = StringWithContext->new('bar');
2459
2460 $context = 42;
2461
2462 my @foo = "".$obj;
2463 ok(defined($context), "scalar context (stringify list)");
2464 is($context, '', "scalar context (stringify list)");
2465 is(scalar(@foo), 1, "correct result (stringify list)");
2466 is($foo[0], 'bar', "correct result (stringify list)");
2467
2468 $context = 42;
2469
2470 my $foo = "".$obj;
2471 ok(defined($context), "scalar context (stringify scalar)");
2472 is($context, '', "scalar context (stringify scalar)");
2473 is($foo, 'bar', "correct result (stringify scalar)");
2474
2475 $context = 42;
2476
2477 "".$obj;
2478
2479 is($context, '', "scalar context (stringify void)");
2480}
2481{
2482 my ($context, $swap);
2483
2484 {
2485 package AddWithContext;
2486 use overload '+' => \&add;
2487
2488 sub new {
2489 my $class = shift;
2490 my ($num) = @_;
2491 bless \$num, $class;
2492 }
2493
2494 sub add {
2495 my $self = shift;
2496 my ($other, $swapped) = @_;
2497 $context = wantarray;
2498 $swap = $swapped;
2499 return ref($self)->new($$self + $other);
2500 }
2501
2502 sub val { ${ $_[0] } }
2503 }
2504
2505 my $obj = AddWithContext->new(6);
2506
2507 $context = $swap = 42;
2508
2509 my @foo = $obj + 7;
2510 ok(defined($context), "scalar context (add list)");
2511 is($context, '', "scalar context (add list)");
2512 ok(defined($swap), "not swapped (add list)");
2513 is($swap, '', "not swapped (add list)");
2514 is(scalar(@foo), 1, "correct result (add list)");
2515 is($foo[0]->val, 13, "correct result (add list)");
2516
2517 $context = $swap = 42;
2518
2519 @foo = 7 + $obj;
2520 ok(defined($context), "scalar context (add list swap)");
2521 is($context, '', "scalar context (add list swap)");
2522 ok(defined($swap), "swapped (add list swap)");
2523 is($swap, 1, "swapped (add list swap)");
2524 is(scalar(@foo), 1, "correct result (add list swap)");
2525 is($foo[0]->val, 13, "correct result (add list swap)");
2526
2527 $context = $swap = 42;
2528
2529 my $foo = $obj + 7;
2530 ok(defined($context), "scalar context (add scalar)");
2531 is($context, '', "scalar context (add scalar)");
2532 ok(defined($swap), "not swapped (add scalar)");
2533 is($swap, '', "not swapped (add scalar)");
2534 is($foo->val, 13, "correct result (add scalar)");
2535
2536 $context = $swap = 42;
2537
2538 my $foo = 7 + $obj;
2539 ok(defined($context), "scalar context (add scalar swap)");
2540 is($context, '', "scalar context (add scalar swap)");
2541 ok(defined($swap), "swapped (add scalar swap)");
2542 is($swap, 1, "swapped (add scalar swap)");
2543 is($foo->val, 13, "correct result (add scalar swap)");
2544
2545 $context = $swap = 42;
2546
2547 $obj + 7;
2548
2549 ok(!defined($context), "void context (add void)");
2550 ok(defined($swap), "not swapped (add void)");
2551 is($swap, '', "not swapped (add void)");
2552
2553 $context = $swap = 42;
2554
2555 7 + $obj;
2556
2557 ok(!defined($context), "void context (add void swap)");
2558 ok(defined($swap), "swapped (add void swap)");
2559 is($swap, 1, "swapped (add void swap)");
2560
2561 $obj = AddWithContext->new(6);
2562
2563 $context = $swap = 42;
2564
2565 my @foo = $obj += 7;
2566 ok(defined($context), "scalar context (add assign list)");
2567 is($context, '', "scalar context (add assign list)");
2568 ok(!defined($swap), "not swapped and autogenerated (add assign list)");
2569 is(scalar(@foo), 1, "correct result (add assign list)");
2570 is($foo[0]->val, 13, "correct result (add assign list)");
2571 is($obj->val, 13, "correct result (add assign list)");
2572
2573 $obj = AddWithContext->new(6);
2574
2575 $context = $swap = 42;
2576
2577 my $foo = $obj += 7;
2578 ok(defined($context), "scalar context (add assign scalar)");
2579 is($context, '', "scalar context (add assign scalar)");
2580 ok(!defined($swap), "not swapped and autogenerated (add assign scalar)");
2581 is($foo->val, 13, "correct result (add assign scalar)");
2582 is($obj->val, 13, "correct result (add assign scalar)");
2583
2584 $obj = AddWithContext->new(6);
2585
2586 $context = $swap = 42;
2587
2588 $obj += 7;
2589
2590 ok(defined($context), "scalar context (add assign void)");
2591 is($context, '', "scalar context (add assign void)");
2592 ok(!defined($swap), "not swapped and autogenerated (add assign void)");
2593 is($obj->val, 13, "correct result (add assign void)");
2594
2595 $obj = AddWithContext->new(6);
2596
2597 $context = $swap = 42;
2598
2599 my @foo = ++$obj;
2600 ok(defined($context), "scalar context (add incr list)");
2601 is($context, '', "scalar context (add incr list)");
2602 ok(!defined($swap), "not swapped and autogenerated (add incr list)");
2603 is(scalar(@foo), 1, "correct result (add incr list)");
2604 is($foo[0]->val, 7, "correct result (add incr list)");
2605 is($obj->val, 7, "correct result (add incr list)");
2606
2607 $obj = AddWithContext->new(6);
2608
2609 $context = $swap = 42;
2610
2611 my $foo = ++$obj;
2612 ok(defined($context), "scalar context (add incr scalar)");
2613 is($context, '', "scalar context (add incr scalar)");
2614 ok(!defined($swap), "not swapped and autogenerated (add incr scalar)");
2615 is($foo->val, 7, "correct result (add incr scalar)");
2616 is($obj->val, 7, "correct result (add incr scalar)");
2617
2618 $obj = AddWithContext->new(6);
2619
2620 $context = $swap = 42;
2621
2622 ++$obj;
2623
2624 ok(defined($context), "scalar context (add incr void)");
2625 is($context, '', "scalar context (add incr void)");
2626 ok(!defined($swap), "not swapped and autogenerated (add incr void)");
2627 is($obj->val, 7, "correct result (add incr void)");
2628}
2629
386a5489
JL
2630# [perl #113010]
2631{
2632 {
2633 package OnlyFallback;
2634 use overload fallback => 0;
2635 }
79c9643d
JL
2636 {
2637 my $obj = bless {}, 'OnlyFallback';
2638 my $died = !eval { "".$obj; 1 };
2639 my $err = $@;
2640 ok($died, "fallback of 0 causes error");
2641 like($err, qr/"\.": no method found/, "correct error");
2642 }
2643
2644 {
2645 package OnlyFallbackUndef;
2646 use overload fallback => undef;
2647 }
2648 {
2649 my $obj = bless {}, 'OnlyFallbackUndef';
2650 my $died = !eval { "".$obj; 1 };
2651 my $err = $@;
2652 ok($died, "fallback of undef causes error");
2653 # this one tries falling back to stringify before dying
2654 like($err, qr/"""": no method found/, "correct error");
2655 }
2656
2657 {
2658 package OnlyFallbackTrue;
2659 use overload fallback => 1;
2660 }
2661 {
2662 my $obj = bless {}, 'OnlyFallbackTrue';
2663 my $val;
2664 my $died = !eval { $val = "".$obj; 1 };
2665 my $err = $@;
2666 ok(!$died, "fallback of 1 doesn't cause error")
2667 || diag("got error of $err");
2668 like($val, qr/^OnlyFallbackTrue=HASH\(/, "stringified correctly");
2669 }
386a5489 2670}
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00bf6ed2
DM
2672{
2673 # Making Regexp class overloaded: avoid infinite recursion.
2674 # Do this in a separate process since it, well, overloads Regexp!
2675 fresh_perl_is(
2676 <<'EOF',
2677package Regexp;
2678use overload q{""} => sub {$_[0] };
2679package main;
2680my $r1 = qr/1/;
2681my $r2 = qr/ABC$r1/;
2682print $r2,"\n";
2683EOF
2684 '(?^:ABC(?^:1))',
2685 { stderr => 1 },
2686 'overloaded REGEXP'
2687 );
2688}
2689
bb4f579a
DM
2690{ # undefining the overload stash -- KEEP THIS TEST LAST
2691 package ant;
2692 use overload '+' => 'onion';
2693 $_ = \&overload::nil;
2694 undef %overload::;
2695 ()=0+bless[];
2696 ::ok(1, 'no crash when undefining %overload::');
2697}
2698
d4a6f307 2699
800401ee 2700# EOF