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Tests for overload errors
[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' }
5e2699c2 51plan tests => 4982;
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");
134is($b, "88");
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");
145is($b, "90");
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
PP
204
205eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1];
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
PP
269
270# Here we test blessing to a package updates hash
271
272eval "package Oscalar; no overload '.'";
273
b1fbf5c3 274is("b${a}", "_.b.__.xx._");
8ebc5c01
PP
275$x="1";
276bless \$x, Oscalar;
b1fbf5c3 277is("b${a}c", "bxxc");
8ebc5c01 278new Oscalar 1;
b1fbf5c3 279is("b${a}c", "bxxc");
8ebc5c01
PP
280
281# Negative overloading:
282
283$na = eval { ~$a };
b1fbf5c3 284like($@, qr/no method found/);
8ebc5c01
PP
285
286# Check AUTOLOADING:
287
288*Oscalar::AUTOLOAD =
289 sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ;
290 goto &{"Oscalar::$AUTOLOAD"}};
291
44a8e56a 292eval "package Oscalar; sub comple; use overload '~' => 'comple'";
8ebc5c01
PP
293
294$na = eval { ~$a }; # Hash was not updated
b1fbf5c3 295like($@, qr/no method found/);
8ebc5c01
PP
296
297bless \$x, Oscalar;
298
299$na = eval { ~$a }; # Hash updated
44a8e56a 300warn "`$na', $@" if $@;
b1fbf5c3
NC
301ok !$@;
302is($na, '_!_xx_!_');
8ebc5c01
PP
303
304$na = 0;
305
306$na = eval { ~$aI }; # Hash was not updated
fdb7e2a2 307like($@, qr/no method found/);
8ebc5c01
PP
308
309bless \$x, OscalarI;
310
311$na = eval { ~$aI };
312print $@;
313
fdb7e2a2
NC
314ok(!$@);
315is($na, '_!_xx_!_');
8ebc5c01 316
44a8e56a 317eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'";
8ebc5c01
PP
318
319$na = eval { $aI >> 1 }; # Hash was not updated
fdb7e2a2 320like($@, qr/no method found/);
8ebc5c01
PP
321
322bless \$x, OscalarI;
323
324$na = 0;
325
326$na = eval { $aI >> 1 };
327print $@;
328
fdb7e2a2
NC
329ok(!$@);
330is($na, '_!_xx_!_');
8ebc5c01 331
44a8e56a 332# warn overload::Method($a, '0+'), "\n";
fdb7e2a2
NC
333is(overload::Method($a, '0+'), \&Oscalar::numify);
334is(overload::Method($aI,'0+'), \&Oscalar::numify);
335ok(overload::Overloaded($aI));
336ok(!overload::Overloaded('overload'));
8ebc5c01 337
fdb7e2a2
NC
338ok(! defined overload::Method($aI, '<<'));
339ok(! defined overload::Method($a, '<'));
8ebc5c01 340
fdb7e2a2
NC
341like (overload::StrVal($aI), qr/^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/);
342is(overload::StrVal(\$aI), "@{[\$aI]}");
8ebc5c01 343
44a8e56a
PP
344# Check overloading by methods (specified deep in the ISA tree).
345{
346 package OscalarII;
347 @ISA = 'OscalarI';
348 sub Oscalar::lshft {"_<<_" . shift() . "_<<_"}
349 eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'";
350}
351
352$aaII = "087";
353$aII = \$aaII;
354bless $aII, 'OscalarII';
355bless \$fake, 'OscalarI'; # update the hash
fdb7e2a2 356is(($aI | 3), '_<<_xx_<<_');
44a8e56a 357# warn $aII << 3;
fdb7e2a2 358is(($aII << 3), '_<<_087_<<_');
44a8e56a 359
b3ac6de7
IZ
360{
361 BEGIN { $int = 7; overload::constant 'integer' => sub {$int++; shift}; }
362 $out = 2**10;
363}
fdb7e2a2
NC
364is($int, 9);
365is($out, 1024);
7898bf0b
RGS
366is($int, 9);
367{
368 BEGIN { overload::constant 'integer' => sub {$int++; shift()+1}; }
369 eval q{$out = 42};
370}
371is($int, 10);
372is($out, 43);
b3ac6de7
IZ
373
374$foo = 'foo';
375$foo1 = 'f\'o\\o';
376{
377 BEGIN { $q = $qr = 7;
378 overload::constant 'q' => sub {$q++; push @q, shift, ($_[1] || 'none'); shift},
379 'qr' => sub {$qr++; push @qr, shift, ($_[1] || 'none'); shift}; }
380 $out = 'foo';
381 $out1 = 'f\'o\\o';
382 $out2 = "a\a$foo,\,";
383 /b\b$foo.\./;
384}
385
fdb7e2a2
NC
386is($out, 'foo');
387is($out, $foo);
388is($out1, 'f\'o\\o');
389is($out1, $foo1);
390is($out2, "a\afoo,\,");
391is("@q", "foo q f'o\\\\o q a\\a qq ,\\, qq");
392is($q, 11);
393is("@qr", "b\\b qq .\\. qq");
394is($qr, 9);
b3ac6de7
IZ
395
396{
397 $_ = '!<b>!foo!<-.>!';
398 BEGIN { overload::constant 'q' => sub {push @q1, shift, ($_[1] || 'none'); "_<" . (shift) . ">_"},
399 'qr' => sub {push @qr1, shift, ($_[1] || 'none'); "!<" . (shift) . ">!"}; }
400 $out = 'foo';
401 $out1 = 'f\'o\\o';
402 $out2 = "a\a$foo,\,";
403 $res = /b\b$foo.\./;
404 $a = <<EOF;
405oups
406EOF
407 $b = <<'EOF';
408oups1
409EOF
410 $c = bareword;
411 m'try it';
412 s'first part'second part';
413 s/yet another/tail here/;
c2e66d9e 414 tr/A-Z/a-z/;
b3ac6de7
IZ
415}
416
fdb7e2a2
NC
417is($out, '_<foo>_');
418is($out1, '_<f\'o\\o>_');
419is($out2, "_<a\a>_foo_<,\,>_");
420is("@q1", "foo q f'o\\\\o q a\\a qq ,\\, qq oups
b3ac6de7 421 qq oups1
fdb7e2a2
NC
422 q second part q tail here s A-Z tr a-z tr");
423is("@qr1", "b\\b qq .\\. qq try it q first part q yet another qq");
424is($res, 1);
425is($a, "_<oups
426>_");
427is($b, "_<oups1
428>_");
429is($c, "bareword");
b3ac6de7 430
ee239bfe
IZ
431{
432 package symbolic; # Primitive symbolic calculator
433 use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num,
434 '=' => \&cpy, '++' => \&inc, '--' => \&dec;
435
436 sub new { shift; bless ['n', @_] }
437 sub cpy {
438 my $self = shift;
439 bless [@$self], ref $self;
440 }
441 sub inc { $_[0] = bless ['++', $_[0], 1]; }
442 sub dec { $_[0] = bless ['--', $_[0], 1]; }
443 sub wrap {
444 my ($obj, $other, $inv, $meth) = @_;
445 if ($meth eq '++' or $meth eq '--') {
446 @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference
447 return $obj;
448 }
449 ($obj, $other) = ($other, $obj) if $inv;
450 bless [$meth, $obj, $other];
451 }
452 sub str {
453 my ($meth, $a, $b) = @{+shift};
454 $a = 'u' unless defined $a;
455 if (defined $b) {
456 "[$meth $a $b]";
457 } else {
458 "[$meth $a]";
459 }
460 }
461 my %subr = ( 'n' => sub {$_[0]} );
462 foreach my $op (split " ", $overload::ops{with_assign}) {
463 $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}";
464 }
465 my @bins = qw(binary 3way_comparison num_comparison str_comparison);
466 foreach my $op (split " ", "@overload::ops{ @bins }") {
467 $subr{$op} = eval "sub {shift() $op shift()}";
468 }
469 foreach my $op (split " ", "@overload::ops{qw(unary func)}") {
470 $subr{$op} = eval "sub {$op shift()}";
471 }
472 $subr{'++'} = $subr{'+'};
473 $subr{'--'} = $subr{'-'};
474
475 sub num {
476 my ($meth, $a, $b) = @{+shift};
477 my $subr = $subr{$meth}
478 or die "Do not know how to ($meth) in symbolic";
479 $a = $a->num if ref $a eq __PACKAGE__;
480 $b = $b->num if ref $b eq __PACKAGE__;
481 $subr->($a,$b);
482 }
483 sub TIESCALAR { my $pack = shift; $pack->new(@_) }
484 sub FETCH { shift }
485 sub nop { } # Around a bug
486 sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; }
487 sub STORE {
488 my $obj = shift;
489 $#$obj = 1;
a1063b2d 490 $obj->[1] = shift;
ee239bfe
IZ
491 }
492}
493
494{
495 my $foo = new symbolic 11;
496 my $baz = $foo++;
fdb7e2a2
NC
497 is((sprintf "%d", $foo), '12');
498 is((sprintf "%d", $baz), '11');
ee239bfe
IZ
499 my $bar = $foo;
500 $baz = ++$foo;
fdb7e2a2
NC
501 is((sprintf "%d", $foo), '13');
502 is((sprintf "%d", $bar), '12');
503 is((sprintf "%d", $baz), '13');
ee239bfe
IZ
504 my $ban = $foo;
505 $baz = ($foo += 1);
fdb7e2a2
NC
506 is((sprintf "%d", $foo), '14');
507 is((sprintf "%d", $bar), '12');
508 is((sprintf "%d", $baz), '14');
509 is((sprintf "%d", $ban), '13');
ee239bfe
IZ
510 $baz = 0;
511 $baz = $foo++;
fdb7e2a2
NC
512 is((sprintf "%d", $foo), '15');
513 is((sprintf "%d", $baz), '14');
514 is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]');
ee239bfe
IZ
515}
516
517{
518 my $iter = new symbolic 2;
519 my $side = new symbolic 1;
520 my $cnt = $iter;
521
522 while ($cnt) {
523 $cnt = $cnt - 1; # The "simple" way
524 $side = (sqrt(1 + $side**2) - 1)/$side;
525 }
526 my $pi = $side*(2**($iter+2));
fdb7e2a2
NC
527 is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]');
528 is((sprintf "%f", $pi), '3.182598');
ee239bfe
IZ
529}
530
531{
532 my $iter = new symbolic 2;
533 my $side = new symbolic 1;
534 my $cnt = $iter;
535
536 while ($cnt--) {
537 $side = (sqrt(1 + $side**2) - 1)/$side;
538 }
539 my $pi = $side*(2**($iter+2));
fdb7e2a2
NC
540 is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]');
541 is((sprintf "%f", $pi), '3.182598');
ee239bfe
IZ
542}
543
544{
545 my ($a, $b);
546 symbolic->vars($a, $b);
547 my $c = sqrt($a**2 + $b**2);
548 $a = 3; $b = 4;
fdb7e2a2 549 is((sprintf "%d", $c), '5');
ee239bfe 550 $a = 12; $b = 5;
fdb7e2a2 551 is((sprintf "%d", $c), '13');
ee239bfe
IZ
552}
553
554{
555 package symbolic1; # Primitive symbolic calculator
556 # Mutator inc/dec
557 use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, '=' => \&cpy;
558
559 sub new { shift; bless ['n', @_] }
560 sub cpy {
561 my $self = shift;
562 bless [@$self], ref $self;
563 }
564 sub wrap {
565 my ($obj, $other, $inv, $meth) = @_;
566 if ($meth eq '++' or $meth eq '--') {
567 @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference
568 return $obj;
569 }
570 ($obj, $other) = ($other, $obj) if $inv;
571 bless [$meth, $obj, $other];
572 }
573 sub str {
574 my ($meth, $a, $b) = @{+shift};
575 $a = 'u' unless defined $a;
576 if (defined $b) {
577 "[$meth $a $b]";
578 } else {
579 "[$meth $a]";
580 }
581 }
582 my %subr = ( 'n' => sub {$_[0]} );
583 foreach my $op (split " ", $overload::ops{with_assign}) {
584 $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}";
585 }
586 my @bins = qw(binary 3way_comparison num_comparison str_comparison);
587 foreach my $op (split " ", "@overload::ops{ @bins }") {
588 $subr{$op} = eval "sub {shift() $op shift()}";
589 }
590 foreach my $op (split " ", "@overload::ops{qw(unary func)}") {
591 $subr{$op} = eval "sub {$op shift()}";
592 }
593 $subr{'++'} = $subr{'+'};
594 $subr{'--'} = $subr{'-'};
595
596 sub num {
597 my ($meth, $a, $b) = @{+shift};
598 my $subr = $subr{$meth}
599 or die "Do not know how to ($meth) in symbolic";
600 $a = $a->num if ref $a eq __PACKAGE__;
601 $b = $b->num if ref $b eq __PACKAGE__;
602 $subr->($a,$b);
603 }
604 sub TIESCALAR { my $pack = shift; $pack->new(@_) }
605 sub FETCH { shift }
606 sub nop { } # Around a bug
607 sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; }
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{
939 # check the `$_[0]' is not an overloadable type warning
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 $x = eval ' overload::constant "fred" => sub {} ; ' ;
7bf00c86 946 like($a, qr/^`fred' is not an overloadable type at/);
4498a751
PM
947}
948
949{
950 # check the `$_[1]' is not a code reference warning
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 $x = eval ' overload::constant "integer" => 1; ' ;
7bf00c86 957 like($a, qr/^`1' is not a code reference at/);
4498a751
PM
958}
959
78f67eb5
JH
960{
961 my $c = 0;
962 package ov_int1;
963 use overload '""' => sub { 3+shift->[0] },
964 '0+' => sub { 10+shift->[0] },
965 'int' => sub { 100+shift->[0] };
966 sub new {my $p = shift; bless [shift], $p}
967
968 package ov_int2;
969 use overload '""' => sub { 5+shift->[0] },
970 '0+' => sub { 30+shift->[0] },
971 'int' => sub { 'ov_int1'->new(1000+shift->[0]) };
972 sub new {my $p = shift; bless [shift], $p}
973
974 package noov_int;
975 use overload '""' => sub { 2+shift->[0] },
976 '0+' => sub { 9+shift->[0] };
977 sub new {my $p = shift; bless [shift], $p}
978
979 package main;
980
981 my $x = new noov_int 11;
982 my $int_x = int $x;
7bf00c86 983 main::is("$int_x", 20);
78f67eb5
JH
984 $x = new ov_int1 31;
985 $int_x = int $x;
7bf00c86 986 main::is("$int_x", 131);
78f67eb5
JH
987 $x = new ov_int2 51;
988 $int_x = int $x;
7bf00c86 989 main::is("$int_x", 1054);
78f67eb5
JH
990}
991
b0bf6df7 992# make sure that we don't infinitely recurse
1554e226
DC
993{
994 my $c = 0;
995 package Recurse;
996 use overload '""' => sub { shift },
997 '0+' => sub { shift },
998 'bool' => sub { shift },
999 fallback => 1;
1000 my $x = bless([]);
7bf00c86
NC
1001 # For some reason beyond me these have to be oks rather than likes.
1002 main::ok("$x" =~ /Recurse=ARRAY/);
1003 main::ok($x);
1004 main::ok($x+0 =~ qr/Recurse=ARRAY/);
11e3e2e4 1005}
78f67eb5 1006
1dc13c17
SC
1007# BugID 20010422.003
1008package Foo;
1009
1010use overload
1011 'bool' => sub { return !$_[0]->is_zero() || undef; }
1012;
1013
1014sub is_zero
1015 {
1016 my $self = shift;
1017 return $self->{var} == 0;
1018 }
1019
1020sub new
1021 {
1022 my $class = shift;
1023 my $self = {};
1024 $self->{var} = shift;
1025 bless $self,$class;
1026 }
1027
1028package main;
1029
1030use strict;
1031
1032my $r = Foo->new(8);
1033$r = Foo->new(0);
78f67eb5 1034
11e3e2e4 1035is(($r || 0), 0);
1554e226 1036
6050d10e
JP
1037package utf8_o;
1038
1039use overload
1040 '""' => sub { return $_[0]->{var}; }
1041 ;
1042
1043sub new
1044 {
1045 my $class = shift;
1046 my $self = {};
1047 $self->{var} = shift;
1048 bless $self,$class;
1049 }
1050
1051package main;
1052
1053
1054my $utfvar = new utf8_o 200.2.1;
11e3e2e4
NC
1055is("$utfvar", 200.2.1); # 223 - stringify
1056is("a$utfvar", "a".200.2.1); # 224 - overload via sv_2pv_flags
6050d10e 1057
446eaa42 1058# 225..227 -- more %{} tests. Hangs in 5.6.0, okay in later releases.
41cb1005
JH
1059# Basically this example implements strong encapsulation: if Hderef::import()
1060# were to eval the overload code in the caller's namespace, the privatisation
1061# would be quite transparent.
1062package Hderef;
1063use overload '%{}' => sub { (caller(0))[0] eq 'Foo' ? $_[0] : die "zap" };
1064package Foo;
1065@Foo::ISA = 'Hderef';
1066sub new { bless {}, shift }
1067sub xet { @_ == 2 ? $_[0]->{$_[1]} :
1068 @_ == 3 ? ($_[0]->{$_[1]} = $_[2]) : undef }
1069package main;
1070my $a = Foo->new;
1071$a->xet('b', 42);
11e3e2e4
NC
1072is ($a->xet('b'), 42);
1073ok (!defined eval { $a->{b} });
1074like ($@, qr/zap/);
41cb1005 1075
29ddfe35
RD
1076{
1077 package t229;
1078 use overload '=' => sub { 42 },
1079 '++' => sub { my $x = ${$_[0]}; $_[0] };
1080 sub new { my $x = 42; bless \$x }
1081
1082 my $warn;
1083 {
1084 local $SIG{__WARN__} = sub { $warn++ };
1085 my $x = t229->new;
1086 my $y = $x;
1087 eval { $y++ };
1088 }
11e3e2e4 1089 main::ok (!$warn);
61f33854
RGS
1090}
1091
1092{
1093 my ($int, $out1, $out2);
1094 {
1095 BEGIN { $int = 0; overload::constant 'integer' => sub {$int++; 17}; }
1096 $out1 = 0;
1097 $out2 = 1;
1098 }
11e3e2e4
NC
1099 is($int, 2, "#24313"); # 230
1100 is($out1, 17, "#24313"); # 231
1101 is($out2, 17, "#24313"); # 232
29ddfe35
RD
1102}
1103
0bdaccee
NC
1104{
1105 package Numify;
1106 use overload (qw(0+ numify fallback 1));
1107
1108 sub new {
1109 my $val = $_[1];
1110 bless \$val, $_[0];
1111 }
1112
1113 sub numify { ${$_[0]} }
1114}
1115
d411a6a9
RD
1116{
1117 package perl31793;
1b1d102f
RD
1118 use overload cmp => sub { 0 };
1119 package perl31793_fb;
76c43448 1120 use overload cmp => sub { 0 }, fallback => 1;
d411a6a9
RD
1121 package main;
1122 my $o = bless [], 'perl31793';
1b1d102f 1123 my $of = bless [], 'perl31793_fb';
d411a6a9 1124 my $no = bless [], 'no_overload';
11e3e2e4
NC
1125 like(overload::StrVal(\"scalar"), qr/^SCALAR\(0x[0-9a-f]+\)$/);
1126 like(overload::StrVal([]), qr/^ARRAY\(0x[0-9a-f]+\)$/);
1127 like(overload::StrVal({}), qr/^HASH\(0x[0-9a-f]+\)$/);
1128 like(overload::StrVal(sub{1}), qr/^CODE\(0x[0-9a-f]+\)$/);
1129 like(overload::StrVal(\*GLOB), qr/^GLOB\(0x[0-9a-f]+\)$/);
1130 like(overload::StrVal(\$o), qr/^REF\(0x[0-9a-f]+\)$/);
0fc92fc6 1131 like(overload::StrVal(qr/a/), qr/^Regexp=REGEXP\(0x[0-9a-f]+\)$/);
11e3e2e4
NC
1132 like(overload::StrVal($o), qr/^perl31793=ARRAY\(0x[0-9a-f]+\)$/);
1133 like(overload::StrVal($of), qr/^perl31793_fb=ARRAY\(0x[0-9a-f]+\)$/);
1134 like(overload::StrVal($no), qr/^no_overload=ARRAY\(0x[0-9a-f]+\)$/);
d411a6a9
RD
1135}
1136
b0bf6df7 1137# These are all check that overloaded values rather than reference addresses
0bdaccee
NC
1138# are what is getting tested.
1139my ($two, $one, $un, $deux) = map {new Numify $_} 2, 1, 1, 2;
1140my ($ein, $zwei) = (1, 2);
1141
1142my %map = (one => 1, un => 1, ein => 1, deux => 2, two => 2, zwei => 2);
1143foreach my $op (qw(<=> == != < <= > >=)) {
1144 foreach my $l (keys %map) {
1145 foreach my $r (keys %map) {
1146 my $ocode = "\$$l $op \$$r";
1147 my $rcode = "$map{$l} $op $map{$r}";
1148
1149 my $got = eval $ocode;
1150 die if $@;
1151 my $expect = eval $rcode;
1152 die if $@;
11e3e2e4 1153 is ($got, $expect, $ocode) or print "# $rcode\n";
0bdaccee
NC
1154 }
1155 }
1156}
131b3ad0
DM
1157{
1158 # check that overloading works in regexes
1159 {
1160 package Foo493;
1161 use overload
1162 '""' => sub { "^$_[0][0]\$" },
1163 '.' => sub {
1164 bless [
1165 $_[2]
1166 ? (ref $_[1] ? $_[1][0] : $_[1]) . ':' .$_[0][0]
1167 : $_[0][0] . ':' . (ref $_[1] ? $_[1][0] : $_[1])
1168 ], 'Foo493'
1169 };
1170 }
1171
1172 my $a = bless [ "a" ], 'Foo493';
11e3e2e4
NC
1173 like('a', qr/$a/);
1174 like('x:a', qr/x$a/);
1175 like('x:a:=', qr/x$a=$/);
1176 like('x:a:a:=', qr/x$a$a=$/);
131b3ad0
DM
1177
1178}
1179
705c898c 1180{
d4b87e75
BM
1181 {
1182 package QRonly;
1183 use overload qr => sub { qr/x/ }, fallback => 1;
1184 }
1185 {
1186 my $x = bless [], "QRonly";
1187
1188 # like tries to be too clever, and decides that $x-stringified
1189 # doesn't look like a regex
1190 ok("x" =~ $x, "qr-only matches");
e4eea578 1191 ok("y" !~ $x, "qr-only doesn't match what it shouldn't");
d4b87e75 1192 ok("xx" =~ /x$x/, "qr-only matches with concat");
e4eea578 1193 like("$x", qr/^QRonly=ARRAY/, "qr-only doesn't have string overload");
d4b87e75
BM
1194
1195 my $qr = bless qr/y/, "QRonly";
1196 ok("x" =~ $qr, "qr with qr-overload uses overload");
e4eea578 1197 ok("y" !~ $qr, "qr with qr-overload uses overload");
d4b87e75
BM
1198 is("$qr", "".qr/y/, "qr with qr-overload stringify");
1199
1200 my $rx = $$qr;
1201 ok("y" =~ $rx, "bare rx with qr-overload doesn't overload match");
e4eea578 1202 ok("x" !~ $rx, "bare rx with qr-overload doesn't overload match");
d4b87e75
BM
1203 is("$rx", "".qr/y/, "bare rx with qr-overload stringify");
1204 }
1205 {
1206 package QRandSTR;
1207 use overload qr => sub { qr/x/ }, q/""/ => sub { "y" };
1208 }
1209 {
1210 my $x = bless [], "QRandSTR";
1211 ok("x" =~ $x, "qr+str uses qr for match");
e4eea578 1212 ok("y" !~ $x, "qr+str uses qr for match");
d4b87e75
BM
1213 ok("xx" =~ /x$x/, "qr+str uses qr for match with concat");
1214 is("$x", "y", "qr+str uses str for stringify");
1215
1216 my $qr = bless qr/z/, "QRandSTR";
1217 is("$qr", "y", "qr with qr+str uses str for stringify");
1218 ok("xx" =~ /x$x/, "qr with qr+str uses qr for match");
1219
1220 my $rx = $$qr;
1221 ok("z" =~ $rx, "bare rx with qr+str doesn't overload match");
1222 is("$rx", "".qr/z/, "bare rx with qr+str doesn't overload stringify");
1223 }
1224 {
1225 package QRany;
1226 use overload qr => sub { $_[0]->(@_) };
1227
1228 package QRself;
1229 use overload qr => sub { $_[0] };
1230 }
1231 {
1232 my $rx = bless sub { ${ qr/x/ } }, "QRany";
e4eea578
RGS
1233 ok("x" =~ $rx, "qr overload accepts a bare rx");
1234 ok("y" !~ $rx, "qr overload accepts a bare rx");
d4b87e75
BM
1235
1236 my $str = bless sub { "x" }, "QRany";
1237 ok(!eval { "x" =~ $str }, "qr overload doesn't accept a string");
e4eea578 1238 like($@, qr/^Overloaded qr did not return a REGEXP/, "correct error");
d4b87e75
BM
1239
1240 my $oqr = bless qr/z/, "QRandSTR";
1241 my $oqro = bless sub { $oqr }, "QRany";
e4eea578 1242 ok("z" =~ $oqro, "qr overload doesn't recurse");
d4b87e75
BM
1243
1244 my $qrs = bless qr/z/, "QRself";
e4eea578 1245 ok("z" =~ $qrs, "qr overload can return self");
d4b87e75
BM
1246 }
1247 {
1248 package STRonly;
1249 use overload q/""/ => sub { "x" };
1250
1251 package STRonlyFB;
1252 use overload q/""/ => sub { "x" }, fallback => 1;
1253 }
1254 {
1255 my $fb = bless [], "STRonlyFB";
e4eea578
RGS
1256 ok("x" =~ $fb, "qr falls back to \"\"");
1257 ok("y" !~ $fb, "qr falls back to \"\"");
d4b87e75
BM
1258
1259 my $nofb = bless [], "STRonly";
e4eea578
RGS
1260 ok("x" =~ $nofb, "qr falls back even without fallback");
1261 ok("y" !~ $nofb, "qr falls back even without fallback");
d4b87e75
BM
1262 }
1263}
1264
1265{
705c898c
RH
1266 my $twenty_three = 23;
1267 # Check that constant overloading propagates into evals
1268 BEGIN { overload::constant integer => sub { 23 } }
11e3e2e4 1269 is(eval "17", $twenty_three);
705c898c 1270}
dd2eae66
NC
1271
1272{
1273 package Sklorsh;
1274 use overload
1275 bool => sub { shift->is_cool };
1276
1277 sub is_cool {
1278 $_[0]->{name} eq 'cool';
1279 }
1280
1281 sub delete {
1282 undef %{$_[0]};
1283 bless $_[0], 'Brap';
1284 return 1;
1285 }
1286
1287 sub delete_with_self {
1288 my $self = shift;
1289 undef %$self;
1290 bless $self, 'Brap';
1291 return 1;
1292 }
1293
1294 package Brap;
1295
1296 1;
1297
1298 package main;
1299
1300 my $obj;
1301 $obj = bless {name => 'cool'}, 'Sklorsh';
1302 $obj->delete;
b0bf6df7 1303 ok(eval {if ($obj) {1}; 1}, $@ || 'reblessed into nonexistent namespace');
dd2eae66
NC
1304
1305 $obj = bless {name => 'cool'}, 'Sklorsh';
1306 $obj->delete_with_self;
1307 ok (eval {if ($obj) {1}; 1}, $@);
1308
1309 my $a = $b = {name => 'hot'};
1310 bless $b, 'Sklorsh';
1311 is(ref $a, 'Sklorsh');
1312 is(ref $b, 'Sklorsh');
1313 ok(!$b, "Expect overloaded boolean");
1314 ok(!$a, "Expect overloaded boolean");
1315}
edbe35ea
VP
1316
1317{
1318 package Flrbbbbb;
1319 use overload
1320 bool => sub { shift->{truth} eq 'yes' },
1321 '0+' => sub { shift->{truth} eq 'yes' ? '1' : '0' },
1322 '!' => sub { shift->{truth} eq 'no' },
1323 fallback => 1;
1324
1325 sub new { my $class = shift; bless { truth => shift }, $class }
1326
1327 package main;
1328
1329 my $yes = Flrbbbbb->new('yes');
1330 my $x;
1331 $x = 1 if $yes; is($x, 1);
1332 $x = 2 unless $yes; is($x, 1);
1333 $x = 3 if !$yes; is($x, 1);
1334 $x = 4 unless !$yes; is($x, 4);
1335
1336 my $no = Flrbbbbb->new('no');
1337 $x = 0;
1338 $x = 1 if $no; is($x, 0);
1339 $x = 2 unless $no; is($x, 2);
1340 $x = 3 if !$no; is($x, 3);
1341 $x = 4 unless !$no; is($x, 3);
1342
1343 $x = 0;
1344 $x = 1 if !$no && $yes; is($x, 1);
1345 $x = 2 unless !$no && $yes; is($x, 1);
1346 $x = 3 if $no || !$yes; is($x, 1);
1347 $x = 4 unless $no || !$yes; is($x, 4);
1348
1349 $x = 0;
1350 $x = 1 if !$no || !$yes; is($x, 1);
1351 $x = 2 unless !$no || !$yes; is($x, 1);
1352 $x = 3 if !$no && !$yes; is($x, 1);
1353 $x = 4 unless !$no && !$yes; is($x, 4);
1354}
1355
ea940d6b 1356{
2372186a
NC
1357 use Scalar::Util 'weaken';
1358
1359 package Shklitza;
1360 use overload '""' => sub {"CLiK KLAK"};
1361
1362 package Ksshfwoom;
2372186a
NC
1363
1364 package main;
1365
1366 my ($obj, $ref);
1367 $obj = bless do {my $a; \$a}, 'Shklitza';
1368 $ref = $obj;
1369
ea940d6b
CBW
1370 is ("$obj", "CLiK KLAK");
1371 is ("$ref", "CLiK KLAK");
2372186a
NC
1372
1373 weaken $ref;
ea940d6b 1374 is ("$ref", "CLiK KLAK");
2372186a
NC
1375
1376 bless $obj, 'Ksshfwoom';
1377
cd75d542
NC
1378 like ($obj, qr/^Ksshfwoom=/);
1379 like ($ref, qr/^Ksshfwoom=/);
2372186a
NC
1380
1381 undef $obj;
1382 is ($ref, undef);
1383}
6dd85743
AF
1384
1385{
1386 package bit;
1387 # bit operations have overloadable assignment variants too
1388
1389 sub new { bless \$_[1], $_[0] }
1390
1391 use overload
1392 "&=" => sub { bit->new($_[0]->val . ' & ' . $_[1]->val) },
1393 "^=" => sub { bit->new($_[0]->val . ' ^ ' . $_[1]->val) },
1394 "|" => sub { bit->new($_[0]->val . ' | ' . $_[1]->val) }, # |= by fallback
1395 ;
1396
1397 sub val { ${$_[0]} }
1398
1399 package main;
1400
1401 my $a = bit->new(my $va = 'a');
1402 my $b = bit->new(my $vb = 'b');
1403
1404 $a &= $b;
1405 is($a->val, 'a & b', "overloaded &= works");
1406
1407 my $c = bit->new(my $vc = 'c');
1408
1409 $b ^= $c;
1410 is($b->val, 'b ^ c', "overloaded ^= works");
1411
1412 my $d = bit->new(my $vd = 'd');
1413
1414 $c |= $d;
1415 is($c->val, 'c | d', "overloaded |= (by fallback) works");
1416}
d11ee47c
RD
1417
1418{
2ab54efd 1419 # comparison operators with nomethod (bug 41546)
d11ee47c
RD
1420 my $warning = "";
1421 my $method;
1422
1423 package nomethod_false;
1424 use overload nomethod => sub { $method = 'nomethod'; 0 };
1425
1426 package nomethod_true;
1427 use overload nomethod => sub { $method= 'nomethod'; 'true' };
1428
1429 package main;
1430 local $^W = 1;
1431 local $SIG{__WARN__} = sub { $warning = $_[0] };
1432
1433 my $f = bless [], 'nomethod_false';
1434 ($warning, $method) = ("", "");
1435 is($f eq 'whatever', 0, 'nomethod makes eq return 0');
1436 is($method, 'nomethod');
1437
1438 my $t = bless [], 'nomethod_true';
1439 ($warning, $method) = ("", "");
1440 is($t eq 'whatever', 'true', 'nomethod makes eq return "true"');
1441 is($method, 'nomethod');
1442 is($warning, "", 'nomethod eq need not return number');
1443
1444 eval q{
1445 package nomethod_false;
1446 use overload cmp => sub { $method = 'cmp'; 0 };
1447 };
1448 $f = bless [], 'nomethod_false';
1449 ($warning, $method) = ("", "");
1450 ok($f eq 'whatever', 'eq falls back to cmp (nomethod not called)');
1451 is($method, 'cmp');
1452
1453 eval q{
1454 package nomethod_true;
1455 use overload cmp => sub { $method = 'cmp'; 'true' };
1456 };
1457 $t = bless [], 'nomethod_true';
1458 ($warning, $method) = ("", "");
1459 ok($t eq 'whatever', 'eq falls back to cmp (nomethod not called)');
1460 is($method, 'cmp');
1461 like($warning, qr/isn't numeric/, 'cmp should return number');
1462
1463}
2c615c57
NC
1464
1465{
2ab54efd
MB
1466 # nomethod called for '!' after attempted fallback
1467 my $nomethod_called = 0;
1468
1469 package nomethod_not;
1470 use overload nomethod => sub { $nomethod_called = 'yes'; };
1471
1472 package main;
1473 my $o = bless [], 'nomethod_not';
1474 my $res = ! $o;
1475
1476 is($nomethod_called, 'yes', "nomethod() is called for '!'");
1477 is($res, 'yes', "nomethod(..., '!') return value propagates");
1478}
1479
1480{
2c615c57 1481 # Subtle bug pre 5.10, as a side effect of the overloading flag being
b0bf6df7 1482 # stored on the reference rather than the referent. Despite the fact that
2c615c57 1483 # objects can only be accessed via references (even internally), the
b0bf6df7 1484 # referent actually knows that it's blessed, not the references. So taking
2c615c57
NC
1485 # a new, unrelated, reference to it gives an object. However, the
1486 # overloading-or-not flag was on the reference prior to 5.10, and taking
1487 # a new reference didn't (use to) copy it.
1488
1489 package kayo;
1490
1491 use overload '""' => sub {${$_[0]}};
1492
1493 sub Pie {
1494 return "$_[0], $_[1]";
1495 }
1496
1497 package main;
1498
1499 my $class = 'kayo';
1500 my $string = 'bam';
1501 my $crunch_eth = bless \$string, $class;
1502
1503 is("$crunch_eth", $string);
1504 is ($crunch_eth->Pie("Meat"), "$string, Meat");
1505
1506 my $wham_eth = \$string;
1507
1508 is("$wham_eth", $string,
1509 'This reference did not have overloading in 5.8.8 and earlier');
1510 is ($crunch_eth->Pie("Apple"), "$string, Apple");
1511
1512 my $class = ref $wham_eth;
1513 $class =~ s/=.*//;
1514
1515 # Bless it back into its own class!
1516 bless $wham_eth, $class;
1517
1518 is("$wham_eth", $string);
1519 is ($crunch_eth->Pie("Blackbird"), "$string, Blackbird");
1520}
c781a409
RD
1521
1522{
1523 package numify_int;
1524 use overload "0+" => sub { $_[0][0] += 1; 42 };
1525 package numify_self;
1526 use overload "0+" => sub { $_[0][0]++; $_[0] };
1527 package numify_other;
1528 use overload "0+" => sub { $_[0][0]++; $_[0][1] = bless [], 'numify_int' };
e28bb1d5 1529 package numify_by_fallback;
800401ee 1530 use overload fallback => 1;
c781a409
RD
1531
1532 package main;
1533 my $o = bless [], 'numify_int';
1534 is(int($o), 42, 'numifies to integer');
1535 is($o->[0], 1, 'int() numifies only once');
1536
1537 my $aref = [];
93521010 1538 my $num_val = int($aref);
c781a409
RD
1539 my $r = bless $aref, 'numify_self';
1540 is(int($r), $num_val, 'numifies to self');
1541 is($r->[0], 1, 'int() numifies once when returning self');
1542
1543 my $s = bless [], 'numify_other';
1544 is(int($s), 42, 'numifies to numification of other object');
1545 is($s->[0], 1, 'int() numifies once when returning other object');
1546 is($s->[1][0], 1, 'returned object numifies too');
e28bb1d5
RD
1547
1548 my $m = bless $aref, 'numify_by_fallback';
1549 is(int($m), $num_val, 'numifies to usual reference value');
800401ee
JH
1550 is(abs($m), $num_val, 'numifies to usual reference value');
1551 is(-$m, -$num_val, 'numifies to usual reference value');
1552 is(0+$m, $num_val, 'numifies to usual reference value');
1553 is($m+0, $num_val, 'numifies to usual reference value');
1554 is($m+$m, 2*$num_val, 'numifies to usual reference value');
1555 is(0-$m, -$num_val, 'numifies to usual reference value');
1556 is(1*$m, $num_val, 'numifies to usual reference value');
9fa8ecf2 1557 is(int($m/1), $num_val, 'numifies to usual reference value');
800401ee
JH
1558 is($m%100, $num_val%100, 'numifies to usual reference value');
1559 is($m**1, $num_val, 'numifies to usual reference value');
1560
1561 is(abs($aref), $num_val, 'abs() of ref');
1562 is(-$aref, -$num_val, 'negative of ref');
1563 is(0+$aref, $num_val, 'ref addition');
1564 is($aref+0, $num_val, 'ref addition');
1565 is($aref+$aref, 2*$num_val, 'ref addition');
1566 is(0-$aref, -$num_val, 'subtraction of ref');
1567 is(1*$aref, $num_val, 'multiplicaton of ref');
9fa8ecf2 1568 is(int($aref/1), $num_val, 'division of ref');
800401ee
JH
1569 is($aref%100, $num_val%100, 'modulo of ref');
1570 is($aref**1, $num_val, 'exponentiation of ref');
c781a409 1571}
800401ee 1572
49c95d58
RD
1573{
1574 package CopyConstructorFallback;
1575 use overload
1576 '++' => sub { "$_[0]"; $_[0] },
1577 fallback => 1;
1578 sub new { bless {} => shift }
1579
1580 package main;
1581
1582 my $o = CopyConstructorFallback->new;
1583 my $x = $o++; # would segfault
1584 my $y = ++$o;
1585 is($x, $o, "copy constructor falls back to assignment (postinc)");
1586 is($y, $o, "copy constructor falls back to assignment (preinc)");
1587}
1588
6f1401dc
DM
1589# only scalar 'x' should currently overload
1590
1591{
1592 package REPEAT;
1593
1594 my ($x,$n, $nm);
1595
1596 use overload
1597 'x' => sub { $x++; 1 },
1598 '0+' => sub { $n++; 1 },
1599 'nomethod' => sub { $nm++; 1 },
1600 'fallback' => 0,
1601 ;
1602
1603 my $s = bless {};
1604
1605 package main;
1606
1607 my @a;
1608 my $count = 3;
1609
1610 ($x,$n,$nm) = (0,0,0);
1611 @a = ((1,2,$s) x $count);
1612 is("$x-$n-$nm", "0-0-0", 'repeat 1');
1613
1614 ($x,$n,$nm) = (0,0,0);
1615 @a = ((1,$s,3) x $count);
1616 is("$x-$n-$nm", "0-0-0", 'repeat 2');
1617
1618 ($x,$n,$nm) = (0,0,0);
1619 @a = ((1,2,3) x $s);
1620 is("$x-$n-$nm", "0-1-0", 'repeat 3');
1621}
1622
1623
1624
1625# RT #57012: magic items need to have mg_get() called before testing for
1626# overload. Lack of this means that overloaded values returned by eg a
1627# tied array didn't call overload methods.
1628# We test here both a tied array and scalar, since the implementation of
1629# tied arrays (and hashes) is such that in rvalue context, mg_get is
1630# called prior to executing the op, while it isn't for a tied scalar.
a02ec77a
DM
1631# We also check that return values are correctly tainted.
1632# We try against two overload packages; one has all expected methods, the
1633# other uses only fallback methods.
6f1401dc
DM
1634
1635{
1636
a02ec77a
DM
1637 # @tests holds a list of test cases. Each elem is an array ref with
1638 # the following entries:
1639 #
1640 # * the value that the overload method should return
1641 #
1642 # * the expression to be evaled. %s is replaced with the
1643 # variable being tested ($ta[0], $ts, or $plain)
1644 #
1645 # * a string listing what functions we expect to be called.
1646 # Each method appends its name in parentheses, so "(=)(+)" means
1647 # we expect the copy constructor and then the add method to be
1648 # called.
1649 #
1650 # * like above, but what should be called for the fallback-only test
1651 # (in this case, nomethod() identifies itself as "(NM:*)" where *
1652 # is the op). If this value is undef, fallback tests are skipped.
1653 #
1654 # * An array ref of expected counts of calls to FETCH/STORE.
1655 # The first three values are:
1656 # 1. the expected number of FETCHs for a tied array
1657 # 2. the expected number of FETCHs for a tied scalar
1658 # 3. the expected number of STOREs
1659 # If there are a further three elements present, then
1660 # these represent the expected counts for the fallback
1661 # version of the tests. If absent, they are assumed to
1662 # be the same as for the full method test
1663 #
1664 # * Under the taint version of the tests, whether we expect
1665 # the result to be tainted (for example comparison ops
1666 # like '==' don't return a tainted value, even if their
1667 # args are.
1668 my @tests;
1669
6f1401dc
DM
1670 my %subs;
1671 my $funcs;
1672 my $use_int;
1673
1674 BEGIN {
1675 # A note on what methods to expect to be called, and
1676 # how many times FETCH/STORE is called:
1677 #
1678 # Mutating ops (+=, ++ etc) trigger a copy ('='), since
7f1e438c 1679 # the code can't distinguish between something that's been copied:
6f1401dc
DM
1680 # $a = foo->new(0); $b = $a; refcnt($$b) == 2
1681 # and overloaded objects stored in ties which will have extra
1682 # refcounts due to the tied_obj magic and entries on the tmps
1683 # stack when returning from FETCH etc. So we always copy.
1684
1685 # This accounts for a '=', and an extra STORE.
1686 # We also have a FETCH returning the final value from the eval,
1687 # plus a FETCH in the overload subs themselves: ($_[0][0])
7f1e438c 1688 # triggers one. However, tied aggregates have a mechanism to prevent
6f1401dc
DM
1689 # multiple fetches between STOREs, which means that the tied
1690 # hash skips doing a FETCH during '='.
1691
a02ec77a
DM
1692 for (qw(+ - * / % ** << >> & | ^)) {
1693 my $op = $_;
1694 $op = '%%' if $op eq '%';
1695 my $e = "%s $op= 3";
6f1401dc
DM
1696 $subs{"$_="} = $e;
1697 # ARRAY FETCH: initial, sub+=, eval-return,
1698 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1699 # STORE: copy, mutator
a02ec77a
DM
1700 push @tests, [ 18, $e, "(=)($_=)", "(=)(NM:$_=)", [ 3, 4, 2 ], 1 ];
1701
1702 $subs{$_} =
1703 "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }";
6f1401dc
DM
1704 # ARRAY FETCH: initial
1705 # SCALAR FETCH: initial eval-return,
a02ec77a
DM
1706 push @tests, [ 18, "%s $op 3", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
1707 push @tests, [ 18, "3 $op %s", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc 1708 }
a02ec77a
DM
1709
1710 # these use string fallback rather than nomethod
1711 for (qw(x .)) {
1712 my $op = $_;
1713 my $e = "%s $op= 3";
1714 $subs{"$_="} = $e;
1715 # For normal case:
1716 # ARRAY FETCH: initial, sub+=, eval-return,
1717 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1718 # STORE: copy, mutator
1719 # for fallback, we just stringify, so eval-return and copy skipped
c5aa2872
DM
1720
1721 push @tests, [ 18, $e, "(=)($_=)", '("")',
1722 [ 3, 4, 2, 2, 3, 1 ], 1 ];
a02ec77a
DM
1723
1724 $subs{$_} =
1725 "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }";
1726 # ARRAY FETCH: initial
1727 # SCALAR FETCH: initial eval-return,
3bc4ee4c
DM
1728 # with fallback, we just stringify, so eval-return skipped,
1729 # but an extra FETCH happens in sub"", except for 'x',
1730 # which passes a copy of the RV to sub"", avoiding the
1731 # second FETCH
1732
1733 push @tests, [ 18, "%s $op 3", "($_)", '("")',
1734 [ 1, 2, 0, 1, ($_ eq '.' ? 2 : 1), 0 ], 1 ];
1735 next if $_ eq 'x'; # repeat only overloads on LHS
1736 push @tests, [ 18, "3 $op %s", "($_)", '("")',
1737 [ 1, 2, 0, 1, 2, 0 ], 1 ];
a02ec77a
DM
1738 }
1739
6f1401dc
DM
1740 for (qw(++ --)) {
1741 my $pre = "$_%s";
1742 my $post = "%s$_";
1743 $subs{$_} = $pre;
a02ec77a 1744 push @tests,
6f1401dc
DM
1745 # ARRAY FETCH: initial, sub+=, eval-return,
1746 # SCALAR FETCH: initial, sub=, sub+=, eval-return,
1747 # STORE: copy, mutator
a02ec77a 1748 [ 18, $pre, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 3, 4, 2 ], 1 ],
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DM
1749 # ARRAY FETCH: initial, sub+=
1750 # SCALAR FETCH: initial, sub=, sub+=
1751 # STORE: copy, mutator
a02ec77a 1752 [ 18, $post, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 2, 3, 2 ], 1 ];
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DM
1753 }
1754
1755 # For the non-mutator ops, we have a initial FETCH,
1756 # an extra FETCH within the sub itself for the scalar option,
1757 # and no STOREs
1758
a02ec77a 1759 for (qw(< <= > >= == != lt le gt ge eq ne)) {
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DM
1760 my $e = "%s $_ 3";
1761 $subs{$_} = $e;
a02ec77a
DM
1762 push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 0 ];
1763 }
1764 for (qw(<=> cmp)) {
1765 my $e = "%s $_ 3";
1766 $subs{$_} = $e;
1767 push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc
DM
1768 }
1769 for (qw(atan2)) {
1770 my $e = "$_ %s, 3";
1771 $subs{$_} = $e;
a02ec77a 1772 push @tests, [ 18, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ];
6f1401dc 1773 }
a02ec77a 1774 for (qw(cos sin exp abs log sqrt int ~)) {
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DM
1775 my $e = "$_(%s)";
1776 $subs{$_} = $e;
a02ec77a
DM
1777 push @tests, [ 1.23, $e, "($_)",
1778 ($_ eq 'int' ? '(0+)' : "(NM:$_)") , [ 1, 2, 0 ], 1 ];
1779 }
1780 for (qw(!)) {
1781 my $e = "$_(%s)";
1782 $subs{$_} = $e;
1783 push @tests, [ 1.23, $e, "($_)", '(0+)', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1784 }
1785 for (qw(-)) {
1786 my $e = "$_(%s)";
1787 $subs{neg} = $e;
a02ec77a 1788 push @tests, [ 18, $e, '(neg)', '(NM:neg)', [ 1, 2, 0 ], 1 ];
6f1401dc
DM
1789 }
1790 my $e = '(%s) ? 1 : 0';
1791 $subs{bool} = $e;
a02ec77a 1792 push @tests, [ 18, $e, '(bool)', '(0+)', [ 1, 2, 0 ], 0 ];
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DM
1793
1794 # note: this is testing unary qr, not binary =~
a02ec77a 1795 $subs{qr} = '(qr/%s/)';
f3ec07c7 1796 push @tests, [ "abc", '"abc" =~ (%s)', '(qr)', '("")', [ 1, 2, 0 ], 0 ];
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DM
1797
1798 $e = '"abc" ~~ (%s)';
1799 $subs{'~~'} = $e;
a02ec77a 1800 push @tests, [ "abc", $e, '(~~)', '(NM:~~)', [ 1, 1, 0 ], 0 ];
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DM
1801
1802 $subs{'-X'} = 'do { my $f = (%s);'
1803 . '$_[1] eq "r" ? (-r ($f)) :'
1804 . '$_[1] eq "e" ? (-e ($f)) :'
1805 . '$_[1] eq "f" ? (-f ($f)) :'
1806 . '$_[1] eq "l" ? (-l ($f)) :'
1807 . '$_[1] eq "t" ? (-t ($f)) :'
1808 . '$_[1] eq "T" ? (-T ($f)) : 0;}';
7f1e438c 1809 # Note - we don't care what these file tests return, as
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DM
1810 # long as the tied and untied versions return the same value.
1811 # The flags below are chosen to test all uses of tryAMAGICftest_MG
1812 for (qw(r e f l t T)) {
40c852de 1813 push @tests, [ 'TEST', "-$_ (%s)", '(-X)', '("")', [ 1, 2, 0 ], 0 ];
6f1401dc
DM
1814 }
1815
1816 $subs{'${}'} = '%s';
a02ec77a 1817 push @tests, [ do {my $s=99; \$s}, '${%s}', '(${})', undef, [ 1, 1, 0 ], 0 ];
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DM
1818
1819 # we skip testing '@{}' here because too much of this test
a02ec77a 1820 # framework involves array dereferences!
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DM
1821
1822 $subs{'%{}'} = '%s';
a02ec77a
DM
1823 push @tests, [ {qw(a 1 b 2 c 3)}, 'join "", sort keys %%{%s}',
1824 '(%{})', undef, [ 1, 2, 0 ], 0 ];
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DM
1825
1826 $subs{'&{}'} = '%s';
a02ec77a
DM
1827 push @tests, [ sub {99}, 'do {&{%s} for 1,2}',
1828 '(&{})(&{})', undef, [ 2, 2, 0 ], 0 ];
6f1401dc
DM
1829
1830 our $RT57012A = 88;
1831 our $RT57012B;
1832 $subs{'*{}'} = '%s';
a02ec77a
DM
1833 push @tests, [ \*RT57012A, '*RT57012B = *{%s}; our $RT57012B',
1834 '(*{})', undef, [ 1, 1, 0 ], 0 ];
6f1401dc 1835
9426e1a5
DM
1836 my $iter_text = ("some random text\n" x 100) . $^X;
1837 open my $iter_fh, '<', \$iter_text
1838 or die "open of \$iter_text gave ($!)\n";
1839 $subs{'<>'} = '<$iter_fh>';
1840 push @tests, [ $iter_fh, '<%s>', '(<>)', undef, [ 1, 1, 0 ], 1 ];
6f1401dc 1841
895b760f
DM
1842 # eval should do tie, overload on its arg before checking taint */
1843 push @tests, [ '1;', 'eval q(eval %s); $@ =~ /Insecure/',
1844 '("")', '("")', [ 1, 2, 0 ], 0 ];
1845
1846
6f1401dc
DM
1847 for my $sub (keys %subs) {
1848 my $term = $subs{$sub};
1849 my $t = sprintf $term, '$_[0][0]';
a02ec77a 1850 my $e ="sub { \$funcs .= '($sub)'; my \$r; if (\$use_int) {"
6f1401dc 1851 . "use integer; \$r = ($t) } else { \$r = ($t) } \$r }";
a02ec77a
DM
1852 $subs{$sub} = eval $e;
1853 die "Compiling sub gave error:\n<$e>\n<$@>\n" if $@;
6f1401dc
DM
1854 }
1855 }
1856
1857 my $fetches;
1858 my $stores;
1859
1860 package RT57012_OV;
1861
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DM
1862 use overload
1863 %subs,
a02ec77a
DM
1864 "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] },
1865 '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] },
1866 '""' => sub { $funcs .= '("")'; "$_[0][0]" },
1867 ;
1868
1869 package RT57012_OV_FB; # only contains fallback conversion functions
1870
1871 use overload
1872 "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] },
1873 '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] },
1874 '""' => sub { $funcs .= '("")'; "$_[0][0]" },
1875 "nomethod" => sub {
1876 $funcs .= "(NM:$_[3])";
1877 my $e = defined($_[1])
1878 ? $_[3] eq 'atan2'
1879 ? $_[2]
1880 ? "atan2(\$_[1],\$_[0][0])"
1881 : "atan2(\$_[0][0],\$_[1])"
1882 : $_[2]
1883 ? "\$_[1] $_[3] \$_[0][0]"
1884 : "\$_[0][0] $_[3] \$_[1]"
1885 : $_[3] eq 'neg'
1886 ? "-\$_[0][0]"
1887 : "$_[3](\$_[0][0])";
1888 my $r;
1889 if ($use_int) {
1890 use integer; $r = eval $e;
1891 }
1892 else {
1893 $r = eval $e;
1894 }
1895 ::diag("eval of nomethod <$e> gave <$@>") if $@;
1896 $r;
1897 }
1898
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DM
1899 ;
1900
1901 package RT57012_TIE_S;
1902
1903 my $tie_val;
a02ec77a 1904 sub TIESCALAR { bless [ bless [ $tie_val ], $_[1] ] }
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DM
1905 sub FETCH { $fetches++; $_[0][0] }
1906 sub STORE { $stores++; $_[0][0] = $_[1] }
1907
1908 package RT57012_TIE_A;
1909
1910 sub TIEARRAY { bless [] }
1911 sub FETCH { $fetches++; $_[0][0] }
1912 sub STORE { $stores++; $_[0][$_[1]] = $_[2] }
1913
1914 package main;
1915
a02ec77a
DM
1916 for my $test (@tests) {
1917 my ($val, $sub_term, $exp_funcs, $exp_fb_funcs,
1918 $exp_counts, $exp_taint) = @$test;
1919
1920 my $tainted_val;
1921 {
1922 # create tainted version of $val (unless its a ref)
1923 my $t = substr($^X,0,0);
1924 my $t0 = $t."0";
1925 my $val1 = $val; # use a copy to avoid stringifying original
1926 $tainted_val = ref($val1) ? $val :
1927 ($val1 =~ /^[\d\.]+$/) ? $val+$t0 : $val.$t;
1928 }
1929 $tie_val = $tainted_val;
6f1401dc 1930
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DM
1931 for my $int ('', 'use integer; ') {
1932 $use_int = ($int ne '');
a02ec77a
DM
1933 my $plain = $tainted_val;
1934 my $plain_term = $int . sprintf $sub_term, '$plain';
1935 my $exp = eval $plain_term;
1936 diag("eval of plain_term <$plain_term> gave <$@>") if $@;
1937 is(tainted($exp), $exp_taint,
1938 "<$plain_term> taint of expected return");
1939
1940 for my $ov_pkg (qw(RT57012_OV RT57012_OV_FB)) {
a02ec77a
DM
1941 next if $ov_pkg eq 'RT57012_OV_FB'
1942 and not defined $exp_fb_funcs;
1943 my ($exp_fetch_a, $exp_fetch_s, $exp_store) =
1944 ($ov_pkg eq 'RT57012_OV' || @$exp_counts < 4)
1945 ? @$exp_counts[0,1,2]
1946 : @$exp_counts[3,4,5];
1947
1948 tie my $ts, 'RT57012_TIE_S', $ov_pkg;
6f1401dc 1949 tie my @ta, 'RT57012_TIE_A';
a02ec77a
DM
1950 $ta[0] = bless [ $tainted_val ], $ov_pkg;
1951 my $oload = bless [ $tainted_val ], $ov_pkg;
1952
9426e1a5
DM
1953 for my $var ('$ta[0]', '$ts', '$oload',
1954 ($sub_term eq '<%s>' ? '${ts}' : ())
1955 ) {
a02ec77a
DM
1956
1957 $funcs = '';
1958 $fetches = 0;
1959 $stores = 0;
1960
1961 my $res_term = $int . sprintf $sub_term, $var;
1962 my $desc = "<$res_term> $ov_pkg" ;
1963 my $res = eval $res_term;
1964 diag("eval of res_term $desc gave <$@>") if $@;
7f1e438c 1965 # uniquely, the inc/dec ops return the original
a02ec77a
DM
1966 # ref rather than a copy, so stringify it to
1967 # find out if its tainted
1968 $res = "$res" if $res_term =~ /\+\+|--/;
1969 is(tainted($res), $exp_taint,
1970 "$desc taint of result return");
a02ec77a
DM
1971 is($res, $exp, "$desc return value");
1972 my $fns =($ov_pkg eq 'RT57012_OV_FB')
1973 ? $exp_fb_funcs : $exp_funcs;
1974 if ($var eq '$oload' && $res_term !~ /oload(\+\+|--)/) {
1975 # non-tied overloading doesn't trigger a copy
1976 # except for post inc/dec
1977 $fns =~ s/^\(=\)//;
1978 }
1979 is($funcs, $fns, "$desc methods called");
1980 next if $var eq '$oload';
1981 my $exp_fetch = ($var eq '$ts') ?
1982 $exp_fetch_s : $exp_fetch_a;
1983 is($fetches, $exp_fetch, "$desc FETCH count");
1984 is($stores, $exp_store, "$desc STORE count");
1985
1986 }
1987
6f1401dc
DM
1988 }
1989 }
1990 }
1991}
1992
25222ff9
FC
1993# Test overload from the main package
1994fresh_perl_is
1995 '$^W = 1; use overload q\""\ => sub {"ning"}; print bless []',
1996 'ning',
1997 { switches => ['-wl'], stderr => 1 },
1998 'use overload from the main package'
1999;
2000
56f08af2
FC
2001{
2002 package blessed_methods;
2003 use overload '+' => sub {};
2004 bless overload::Method __PACKAGE__,'+';
2005 eval { overload::Method __PACKAGE__,'+' };
2006 ::is($@, '', 'overload::Method and blessed overload methods');
2007}
2008
bf5522a1
MB
2009{
2010 # fallback to 'cmp' and '<=>' with heterogeneous operands
2011 # [perl #71286]
2012 my $not_found = 'no method found';
2013 my $used = 0;
2014 package CmpBase;
2015 sub new {
2016 my $n = $_[1] || 0;
2017 bless \$n, ref $_[0] || $_[0];
2018 }
2019 sub cmp {
2020 $used = \$_[0];
2021 (${$_[0]} <=> ${$_[1]}) * ($_[2] ? -1 : 1);
2022 }
2023
2024 package NCmp;
2025 use base 'CmpBase';
2026 use overload '<=>' => 'cmp';
2027
2028 package SCmp;
2029 use base 'CmpBase';
2030 use overload 'cmp' => 'cmp';
2031
2032 package main;
2033 my $n = NCmp->new(5);
2034 my $s = SCmp->new(3);
2035 my $res;
2036
2037 eval { $res = $n > $s; };
2038 $res = $not_found if $@ =~ /$not_found/;
2039 is($res, 1, 'A>B using A<=> when B overloaded, no B<=>');
2040
2041 eval { $res = $s < $n; };
2042 $res = $not_found if $@ =~ /$not_found/;
2043 is($res, 1, 'A<B using B<=> when A overloaded, no A<=>');
2044
2045 eval { $res = $s lt $n; };
2046 $res = $not_found if $@ =~ /$not_found/;
2047 is($res, 1, 'A lt B using A:cmp when B overloaded, no B:cmp');
2048
2049 eval { $res = $n gt $s; };
2050 $res = $not_found if $@ =~ /$not_found/;
2051 is($res, 1, 'A gt B using B:cmp when A overloaded, no A:cmp');
2052
2053 my $o = NCmp->new(9);
2054 $res = $n < $o;
2055 is($used, \$n, 'A < B uses <=> from A in preference to B');
2056
2057 my $t = SCmp->new(7);
2058 $res = $s lt $t;
2059 is($used, \$s, 'A lt B uses cmp from A in preference to B');
2060}
2061
2062{
2063 # Combinatorial testing of 'fallback' and 'nomethod'
2064 # [perl #71286]
2065 package NuMB;
2066 use overload '0+' => sub { ${$_[0]}; },
2067 '""' => 'str';
2068 sub new {
2069 my $self = shift;
2070 my $n = @_ ? shift : 0;
2071 bless my $obj = \$n, ref $self || $self;
2072 }
2073 sub str {
2074 no strict qw/refs/;
2075 my $s = "(${$_[0]} ";
2076 $s .= "nomethod, " if defined ${ref($_[0]).'::(nomethod'};
2077 my $fb = ${ref($_[0]).'::()'};
2078 $s .= "fb=" . (defined $fb ? 0 + $fb : 'undef') . ")";
2079 }
2080 sub nomethod { "${$_[0]}.nomethod"; }
2081
2082 # create classes for tests
2083 package main;
2084 my @falls = (0, 'undef', 1);
2085 my @nomethods = ('', 'nomethod');
2086 my $not_found = 'no method found';
2087 for my $fall (@falls) {
2088 for my $nomethod (@nomethods) {
2089 my $nomethod_decl = $nomethod
2090 ? $nomethod . "=>'nomethod'," : '';
2091 eval qq{
2092 package NuMB$fall$nomethod;
2093 use base qw/NuMB/;
2094 use overload $nomethod_decl
2095 fallback => $fall;
2096 };
2097 }
2098 }
2099
2100 # operation and precedence of 'fallback' and 'nomethod'
2101 # for all combinations with 2 overloaded operands
2102 for my $nomethod2 (@nomethods) {
2103 for my $nomethod1 (@nomethods) {
2104 for my $fall2 (@falls) {
2105 my $pack2 = "NuMB$fall2$nomethod2";
2106 for my $fall1 (@falls) {
2107 my $pack1 = "NuMB$fall1$nomethod1";
2108 my ($test, $out, $exp);
2109 eval qq{
2110 my \$x = $pack1->new(2);
2111 my \$y = $pack2->new(3);
2112 \$test = "\$x" . ' * ' . "\$y";
2113 \$out = \$x * \$y;
2114 };
2115 $out = $not_found if $@ =~ /$not_found/;
2116 $exp = $nomethod1 ? '2.nomethod' :
2117 $nomethod2 ? '3.nomethod' :
2118 $fall1 eq '1' && $fall2 eq '1' ? 6
2119 : $not_found;
2120 is($out, $exp, "$test --> $exp");
2121 }
2122 }
2123 }
2124 }
2125
2126 # operation of 'fallback' and 'nomethod'
2127 # where the other operand is not overloaded
2128 for my $nomethod (@nomethods) {
2129 for my $fall (@falls) {
2130 my ($test, $out, $exp);
2131 eval qq{
2132 my \$x = NuMB$fall$nomethod->new(2);
2133 \$test = "\$x" . ' * 3';
2134 \$out = \$x * 3;
2135 };
2136 $out = $not_found if $@ =~ /$not_found/;
2137 $exp = $nomethod ? '2.nomethod' :
2138 $fall eq '1' ? 6
2139 : $not_found;
2140 is($out, $exp, "$test --> $exp");
2141
2142 eval qq{
2143 my \$x = NuMB$fall$nomethod->new(2);
2144 \$test = '3 * ' . "\$x";
2145 \$out = 3 * \$x;
2146 };
2147 $out = $not_found if $@ =~ /$not_found/;
2148 is($out, $exp, "$test --> $exp");
2149 }
2150 }
2151}
2152
bff33ce0
DM
2153# since 5.6 overloaded <> was leaving an extra arg on the stack!
2154
2155{
2156 package Iter1;
2157 use overload '<>' => sub { 11 };
2158 package main;
2159 my $a = bless [], 'Iter1';
2160 my $x;
2161 my @a = (10, ($x = <$a>), 12);
2162 is ($a[0], 10, 'Iter1: a[0]');
2163 is ($a[1], 11, 'Iter1: a[1]');
2164 is ($a[2], 12, 'Iter1: a[2]');
2165 @a = (10, ($x .= <$a>), 12);
2166 is ($a[0], 10, 'Iter1: a[0] concat');
2167 is ($a[1], 1111, 'Iter1: a[1] concat');
2168 is ($a[2], 12, 'Iter1: a[2] concat');
2169}
bf5522a1 2170
5e2699c2
FC
2171# Some tests for error messages
2172{
2173 package Justus;
2174 use overload '+' => 'justice';
2175 eval {bless[]};
2176 ::like $@, qr/^Can't resolve method "justice" overloading "\+" in p(?x:
2177 )ackage "overload" at /,
2178 'Error message when explicitly named overload method does not exist';
2179
2180 package JustUs;
2181 our @ISA = 'JustYou';
2182 package JustYou { use overload '+' => 'injustice'; }
2183 "JustUs"->${\"(+"};
2184 eval {bless []};
2185 ::like $@, qr/^Stub found while resolving method "\?{3}" overloadin(?x:
2186 )g "\+" in package "overload" at /,
2187 'Error message when sub stub is encountered';
2188}
bf5522a1 2189
800401ee 2190# EOF