Commit | Line | Data |
---|---|---|
8ebc5c01 | 1 | #!./perl |
2 | ||
3 | BEGIN { | |
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 | 11 | } |
12 | ||
8ebc5c01 | 13 | package Oscalar; |
14 | use 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 | ||
32 | qw( | |
33 | "" stringify | |
b0bf6df7 | 34 | 0+ numify) # Order of arguments insignificant |
8ebc5c01 | 35 | ); |
36 | ||
37 | sub new { | |
38 | my $foo = $_[1]; | |
39 | bless \$foo, $_[0]; | |
40 | } | |
41 | ||
42 | sub stringify { "${$_[0]}" } | |
43 | sub numify { 0 + "${$_[0]}" } # Not needed, additional overhead | |
44 | # comparing to direct compilation based on | |
45 | # stringify | |
46 | ||
47 | package main; | |
48 | ||
8ebc5c01 | 49 | $| = 1; |
e4eea578 | 50 | use Test::More tests => 605; |
b1fbf5c3 | 51 | |
8ebc5c01 | 52 | |
53 | $a = new Oscalar "087"; | |
54 | $b= "$a"; | |
55 | ||
b1fbf5c3 NC |
56 | is($b, $a); |
57 | is($b, "087"); | |
58 | is(ref $a, "Oscalar"); | |
59 | is($a, $a); | |
60 | is($a, "087"); | |
8ebc5c01 | 61 | |
62 | $c = $a + 7; | |
63 | ||
b1fbf5c3 NC |
64 | is(ref $c, "Oscalar"); |
65 | isnt($c, $a); | |
66 | is($c, "94"); | |
8ebc5c01 | 67 | |
68 | $b=$a; | |
69 | ||
b1fbf5c3 | 70 | is(ref $a, "Oscalar"); |
8ebc5c01 | 71 | |
72 | $b++; | |
73 | ||
b1fbf5c3 NC |
74 | is(ref $b, "Oscalar"); |
75 | is($a, "087"); | |
76 | is($b, "88"); | |
77 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 78 | |
79 | $c=$b; | |
80 | $c-=$a; | |
81 | ||
b1fbf5c3 NC |
82 | is(ref $c, "Oscalar"); |
83 | is($a, "087"); | |
84 | is($c, "1"); | |
85 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 86 | |
87 | $b=1; | |
88 | $b+=$a; | |
89 | ||
b1fbf5c3 NC |
90 | is(ref $b, "Oscalar"); |
91 | is($a, "087"); | |
92 | is($b, "88"); | |
93 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 94 | |
95 | eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ]; | |
96 | ||
97 | $b=$a; | |
98 | ||
b1fbf5c3 | 99 | is(ref $a, "Oscalar"); |
8ebc5c01 | 100 | |
101 | $b++; | |
102 | ||
b1fbf5c3 NC |
103 | is(ref $b, "Oscalar"); |
104 | is($a, "087"); | |
105 | is($b, "88"); | |
106 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 107 | |
108 | package Oscalar; | |
109 | $dummy=bless \$dummy; # Now cache of method should be reloaded | |
110 | package main; | |
111 | ||
112 | $b=$a; | |
113 | $b++; | |
114 | ||
b1fbf5c3 NC |
115 | is(ref $b, "Oscalar"); |
116 | is($a, "087"); | |
117 | is($b, "88"); | |
118 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 119 | |
32251b26 | 120 | undef $b; # Destroying updates tables too... |
8ebc5c01 | 121 | |
122 | eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ]; | |
123 | ||
124 | $b=$a; | |
125 | ||
b1fbf5c3 | 126 | is(ref $a, "Oscalar"); |
8ebc5c01 | 127 | |
128 | $b++; | |
129 | ||
b1fbf5c3 NC |
130 | is(ref $b, "Oscalar"); |
131 | is($a, "087"); | |
132 | is($b, "88"); | |
133 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 134 | |
135 | package Oscalar; | |
136 | $dummy=bless \$dummy; # Now cache of method should be reloaded | |
137 | package main; | |
138 | ||
139 | $b++; | |
140 | ||
b1fbf5c3 NC |
141 | is(ref $b, "Oscalar"); |
142 | is($a, "087"); | |
143 | is($b, "90"); | |
144 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 145 | |
146 | $b=$a; | |
147 | $b++; | |
148 | ||
b1fbf5c3 NC |
149 | is(ref $b, "Oscalar"); |
150 | is($a, "087"); | |
151 | is($b, "89"); | |
152 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 153 | |
154 | ||
b1fbf5c3 | 155 | ok($b? 1:0); |
8ebc5c01 | 156 | |
157 | eval q[ package Oscalar; use overload ('=' => sub {$main::copies++; | |
158 | package Oscalar; | |
159 | local $new=$ {$_[0]}; | |
160 | bless \$new } ) ]; | |
161 | ||
162 | $b=new Oscalar "$a"; | |
163 | ||
b1fbf5c3 NC |
164 | is(ref $b, "Oscalar"); |
165 | is($a, "087"); | |
166 | is($b, "087"); | |
167 | is(ref $a, "Oscalar"); | |
8ebc5c01 | 168 | |
169 | $b++; | |
170 | ||
b1fbf5c3 NC |
171 | is(ref $b, "Oscalar"); |
172 | is($a, "087"); | |
173 | is($b, "89"); | |
174 | is(ref $a, "Oscalar"); | |
175 | is($copies, undef); | |
8ebc5c01 | 176 | |
177 | $b+=1; | |
178 | ||
b1fbf5c3 NC |
179 | is(ref $b, "Oscalar"); |
180 | is($a, "087"); | |
181 | is($b, "90"); | |
182 | is(ref $a, "Oscalar"); | |
183 | is($copies, undef); | |
8ebc5c01 | 184 | |
185 | $b=$a; | |
186 | $b+=1; | |
187 | ||
b1fbf5c3 NC |
188 | is(ref $b, "Oscalar"); |
189 | is($a, "087"); | |
190 | is($b, "88"); | |
191 | is(ref $a, "Oscalar"); | |
192 | is($copies, undef); | |
8ebc5c01 | 193 | |
194 | $b=$a; | |
195 | $b++; | |
196 | ||
b1fbf5c3 NC |
197 | is(ref $b, "Oscalar"); |
198 | is($a, "087"); | |
199 | is($b, "89"); | |
200 | is(ref $a, "Oscalar"); | |
201 | is($copies, 1); | |
8ebc5c01 | 202 | |
203 | eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1]; | |
204 | $_[0] } ) ]; | |
205 | $c=new Oscalar; # Cause rehash | |
206 | ||
207 | $b=$a; | |
208 | $b+=1; | |
209 | ||
b1fbf5c3 NC |
210 | is(ref $b, "Oscalar"); |
211 | is($a, "087"); | |
212 | is($b, "90"); | |
213 | is(ref $a, "Oscalar"); | |
214 | is($copies, 2); | |
8ebc5c01 | 215 | |
216 | $b+=$b; | |
217 | ||
b1fbf5c3 NC |
218 | is(ref $b, "Oscalar"); |
219 | is($b, "360"); | |
220 | is($copies, 2); | |
8ebc5c01 | 221 | $b=-$b; |
222 | ||
b1fbf5c3 NC |
223 | is(ref $b, "Oscalar"); |
224 | is($b, "-360"); | |
225 | is($copies, 2); | |
8ebc5c01 | 226 | |
227 | $b=abs($b); | |
228 | ||
b1fbf5c3 NC |
229 | is(ref $b, "Oscalar"); |
230 | is($b, "360"); | |
231 | is($copies, 2); | |
8ebc5c01 | 232 | |
233 | $b=abs($b); | |
234 | ||
b1fbf5c3 NC |
235 | is(ref $b, "Oscalar"); |
236 | is($b, "360"); | |
237 | is($copies, 2); | |
8ebc5c01 | 238 | |
239 | eval q[package Oscalar; | |
240 | use overload ('x' => sub {new Oscalar ( $_[2] ? "_.$_[1]._" x $ {$_[0]} | |
241 | : "_.${$_[0]}._" x $_[1])}) ]; | |
242 | ||
243 | $a=new Oscalar "yy"; | |
244 | $a x= 3; | |
b1fbf5c3 | 245 | is($a, "_.yy.__.yy.__.yy._"); |
8ebc5c01 | 246 | |
247 | eval q[package Oscalar; | |
248 | use overload ('.' => sub {new Oscalar ( $_[2] ? | |
249 | "_.$_[1].__.$ {$_[0]}._" | |
250 | : "_.$ {$_[0]}.__.$_[1]._")}) ]; | |
251 | ||
252 | $a=new Oscalar "xx"; | |
253 | ||
b1fbf5c3 | 254 | is("b${a}c", "_._.b.__.xx._.__.c._"); |
8ebc5c01 | 255 | |
256 | # Check inheritance of overloading; | |
257 | { | |
258 | package OscalarI; | |
259 | @ISA = 'Oscalar'; | |
260 | } | |
261 | ||
262 | $aI = new OscalarI "$a"; | |
b1fbf5c3 NC |
263 | is(ref $aI, "OscalarI"); |
264 | is("$aI", "xx"); | |
265 | is($aI, "xx"); | |
266 | is("b${aI}c", "_._.b.__.xx._.__.c._"); | |
8ebc5c01 | 267 | |
268 | # Here we test blessing to a package updates hash | |
269 | ||
270 | eval "package Oscalar; no overload '.'"; | |
271 | ||
b1fbf5c3 | 272 | is("b${a}", "_.b.__.xx._"); |
8ebc5c01 | 273 | $x="1"; |
274 | bless \$x, Oscalar; | |
b1fbf5c3 | 275 | is("b${a}c", "bxxc"); |
8ebc5c01 | 276 | new Oscalar 1; |
b1fbf5c3 | 277 | is("b${a}c", "bxxc"); |
8ebc5c01 | 278 | |
279 | # Negative overloading: | |
280 | ||
281 | $na = eval { ~$a }; | |
b1fbf5c3 | 282 | like($@, qr/no method found/); |
8ebc5c01 | 283 | |
284 | # Check AUTOLOADING: | |
285 | ||
286 | *Oscalar::AUTOLOAD = | |
287 | sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ; | |
288 | goto &{"Oscalar::$AUTOLOAD"}}; | |
289 | ||
44a8e56a | 290 | eval "package Oscalar; sub comple; use overload '~' => 'comple'"; |
8ebc5c01 | 291 | |
292 | $na = eval { ~$a }; # Hash was not updated | |
b1fbf5c3 | 293 | like($@, qr/no method found/); |
8ebc5c01 | 294 | |
295 | bless \$x, Oscalar; | |
296 | ||
297 | $na = eval { ~$a }; # Hash updated | |
44a8e56a | 298 | warn "`$na', $@" if $@; |
b1fbf5c3 NC |
299 | ok !$@; |
300 | is($na, '_!_xx_!_'); | |
8ebc5c01 | 301 | |
302 | $na = 0; | |
303 | ||
304 | $na = eval { ~$aI }; # Hash was not updated | |
fdb7e2a2 | 305 | like($@, qr/no method found/); |
8ebc5c01 | 306 | |
307 | bless \$x, OscalarI; | |
308 | ||
309 | $na = eval { ~$aI }; | |
310 | print $@; | |
311 | ||
fdb7e2a2 NC |
312 | ok(!$@); |
313 | is($na, '_!_xx_!_'); | |
8ebc5c01 | 314 | |
44a8e56a | 315 | eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'"; |
8ebc5c01 | 316 | |
317 | $na = eval { $aI >> 1 }; # Hash was not updated | |
fdb7e2a2 | 318 | like($@, qr/no method found/); |
8ebc5c01 | 319 | |
320 | bless \$x, OscalarI; | |
321 | ||
322 | $na = 0; | |
323 | ||
324 | $na = eval { $aI >> 1 }; | |
325 | print $@; | |
326 | ||
fdb7e2a2 NC |
327 | ok(!$@); |
328 | is($na, '_!_xx_!_'); | |
8ebc5c01 | 329 | |
44a8e56a | 330 | # warn overload::Method($a, '0+'), "\n"; |
fdb7e2a2 NC |
331 | is(overload::Method($a, '0+'), \&Oscalar::numify); |
332 | is(overload::Method($aI,'0+'), \&Oscalar::numify); | |
333 | ok(overload::Overloaded($aI)); | |
334 | ok(!overload::Overloaded('overload')); | |
8ebc5c01 | 335 | |
fdb7e2a2 NC |
336 | ok(! defined overload::Method($aI, '<<')); |
337 | ok(! defined overload::Method($a, '<')); | |
8ebc5c01 | 338 | |
fdb7e2a2 NC |
339 | like (overload::StrVal($aI), qr/^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); |
340 | is(overload::StrVal(\$aI), "@{[\$aI]}"); | |
8ebc5c01 | 341 | |
44a8e56a | 342 | # Check overloading by methods (specified deep in the ISA tree). |
343 | { | |
344 | package OscalarII; | |
345 | @ISA = 'OscalarI'; | |
346 | sub Oscalar::lshft {"_<<_" . shift() . "_<<_"} | |
347 | eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'"; | |
348 | } | |
349 | ||
350 | $aaII = "087"; | |
351 | $aII = \$aaII; | |
352 | bless $aII, 'OscalarII'; | |
353 | bless \$fake, 'OscalarI'; # update the hash | |
fdb7e2a2 | 354 | is(($aI | 3), '_<<_xx_<<_'); |
44a8e56a | 355 | # warn $aII << 3; |
fdb7e2a2 | 356 | is(($aII << 3), '_<<_087_<<_'); |
44a8e56a | 357 | |
b3ac6de7 IZ |
358 | { |
359 | BEGIN { $int = 7; overload::constant 'integer' => sub {$int++; shift}; } | |
360 | $out = 2**10; | |
361 | } | |
fdb7e2a2 NC |
362 | is($int, 9); |
363 | is($out, 1024); | |
7898bf0b RGS |
364 | is($int, 9); |
365 | { | |
366 | BEGIN { overload::constant 'integer' => sub {$int++; shift()+1}; } | |
367 | eval q{$out = 42}; | |
368 | } | |
369 | is($int, 10); | |
370 | is($out, 43); | |
b3ac6de7 IZ |
371 | |
372 | $foo = 'foo'; | |
373 | $foo1 = 'f\'o\\o'; | |
374 | { | |
375 | BEGIN { $q = $qr = 7; | |
376 | overload::constant 'q' => sub {$q++; push @q, shift, ($_[1] || 'none'); shift}, | |
377 | 'qr' => sub {$qr++; push @qr, shift, ($_[1] || 'none'); shift}; } | |
378 | $out = 'foo'; | |
379 | $out1 = 'f\'o\\o'; | |
380 | $out2 = "a\a$foo,\,"; | |
381 | /b\b$foo.\./; | |
382 | } | |
383 | ||
fdb7e2a2 NC |
384 | is($out, 'foo'); |
385 | is($out, $foo); | |
386 | is($out1, 'f\'o\\o'); | |
387 | is($out1, $foo1); | |
388 | is($out2, "a\afoo,\,"); | |
389 | is("@q", "foo q f'o\\\\o q a\\a qq ,\\, qq"); | |
390 | is($q, 11); | |
391 | is("@qr", "b\\b qq .\\. qq"); | |
392 | is($qr, 9); | |
b3ac6de7 IZ |
393 | |
394 | { | |
395 | $_ = '!<b>!foo!<-.>!'; | |
396 | BEGIN { overload::constant 'q' => sub {push @q1, shift, ($_[1] || 'none'); "_<" . (shift) . ">_"}, | |
397 | 'qr' => sub {push @qr1, shift, ($_[1] || 'none'); "!<" . (shift) . ">!"}; } | |
398 | $out = 'foo'; | |
399 | $out1 = 'f\'o\\o'; | |
400 | $out2 = "a\a$foo,\,"; | |
401 | $res = /b\b$foo.\./; | |
402 | $a = <<EOF; | |
403 | oups | |
404 | EOF | |
405 | $b = <<'EOF'; | |
406 | oups1 | |
407 | EOF | |
408 | $c = bareword; | |
409 | m'try it'; | |
410 | s'first part'second part'; | |
411 | s/yet another/tail here/; | |
c2e66d9e | 412 | tr/A-Z/a-z/; |
b3ac6de7 IZ |
413 | } |
414 | ||
fdb7e2a2 NC |
415 | is($out, '_<foo>_'); |
416 | is($out1, '_<f\'o\\o>_'); | |
417 | is($out2, "_<a\a>_foo_<,\,>_"); | |
418 | is("@q1", "foo q f'o\\\\o q a\\a qq ,\\, qq oups | |
b3ac6de7 | 419 | qq oups1 |
fdb7e2a2 NC |
420 | q second part q tail here s A-Z tr a-z tr"); |
421 | is("@qr1", "b\\b qq .\\. qq try it q first part q yet another qq"); | |
422 | is($res, 1); | |
423 | is($a, "_<oups | |
424 | >_"); | |
425 | is($b, "_<oups1 | |
426 | >_"); | |
427 | is($c, "bareword"); | |
b3ac6de7 | 428 | |
ee239bfe IZ |
429 | { |
430 | package symbolic; # Primitive symbolic calculator | |
431 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, | |
432 | '=' => \&cpy, '++' => \&inc, '--' => \&dec; | |
433 | ||
434 | sub new { shift; bless ['n', @_] } | |
435 | sub cpy { | |
436 | my $self = shift; | |
437 | bless [@$self], ref $self; | |
438 | } | |
439 | sub inc { $_[0] = bless ['++', $_[0], 1]; } | |
440 | sub dec { $_[0] = bless ['--', $_[0], 1]; } | |
441 | sub wrap { | |
442 | my ($obj, $other, $inv, $meth) = @_; | |
443 | if ($meth eq '++' or $meth eq '--') { | |
444 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference | |
445 | return $obj; | |
446 | } | |
447 | ($obj, $other) = ($other, $obj) if $inv; | |
448 | bless [$meth, $obj, $other]; | |
449 | } | |
450 | sub str { | |
451 | my ($meth, $a, $b) = @{+shift}; | |
452 | $a = 'u' unless defined $a; | |
453 | if (defined $b) { | |
454 | "[$meth $a $b]"; | |
455 | } else { | |
456 | "[$meth $a]"; | |
457 | } | |
458 | } | |
459 | my %subr = ( 'n' => sub {$_[0]} ); | |
460 | foreach my $op (split " ", $overload::ops{with_assign}) { | |
461 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; | |
462 | } | |
463 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); | |
464 | foreach my $op (split " ", "@overload::ops{ @bins }") { | |
465 | $subr{$op} = eval "sub {shift() $op shift()}"; | |
466 | } | |
467 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { | |
468 | $subr{$op} = eval "sub {$op shift()}"; | |
469 | } | |
470 | $subr{'++'} = $subr{'+'}; | |
471 | $subr{'--'} = $subr{'-'}; | |
472 | ||
473 | sub num { | |
474 | my ($meth, $a, $b) = @{+shift}; | |
475 | my $subr = $subr{$meth} | |
476 | or die "Do not know how to ($meth) in symbolic"; | |
477 | $a = $a->num if ref $a eq __PACKAGE__; | |
478 | $b = $b->num if ref $b eq __PACKAGE__; | |
479 | $subr->($a,$b); | |
480 | } | |
481 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } | |
482 | sub FETCH { shift } | |
483 | sub nop { } # Around a bug | |
484 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; } | |
485 | sub STORE { | |
486 | my $obj = shift; | |
487 | $#$obj = 1; | |
a1063b2d | 488 | $obj->[1] = shift; |
ee239bfe IZ |
489 | } |
490 | } | |
491 | ||
492 | { | |
493 | my $foo = new symbolic 11; | |
494 | my $baz = $foo++; | |
fdb7e2a2 NC |
495 | is((sprintf "%d", $foo), '12'); |
496 | is((sprintf "%d", $baz), '11'); | |
ee239bfe IZ |
497 | my $bar = $foo; |
498 | $baz = ++$foo; | |
fdb7e2a2 NC |
499 | is((sprintf "%d", $foo), '13'); |
500 | is((sprintf "%d", $bar), '12'); | |
501 | is((sprintf "%d", $baz), '13'); | |
ee239bfe IZ |
502 | my $ban = $foo; |
503 | $baz = ($foo += 1); | |
fdb7e2a2 NC |
504 | is((sprintf "%d", $foo), '14'); |
505 | is((sprintf "%d", $bar), '12'); | |
506 | is((sprintf "%d", $baz), '14'); | |
507 | is((sprintf "%d", $ban), '13'); | |
ee239bfe IZ |
508 | $baz = 0; |
509 | $baz = $foo++; | |
fdb7e2a2 NC |
510 | is((sprintf "%d", $foo), '15'); |
511 | is((sprintf "%d", $baz), '14'); | |
512 | is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]'); | |
ee239bfe IZ |
513 | } |
514 | ||
515 | { | |
516 | my $iter = new symbolic 2; | |
517 | my $side = new symbolic 1; | |
518 | my $cnt = $iter; | |
519 | ||
520 | while ($cnt) { | |
521 | $cnt = $cnt - 1; # The "simple" way | |
522 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
523 | } | |
524 | my $pi = $side*(2**($iter+2)); | |
fdb7e2a2 NC |
525 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
526 | is((sprintf "%f", $pi), '3.182598'); | |
ee239bfe IZ |
527 | } |
528 | ||
529 | { | |
530 | my $iter = new symbolic 2; | |
531 | my $side = new symbolic 1; | |
532 | my $cnt = $iter; | |
533 | ||
534 | while ($cnt--) { | |
535 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
536 | } | |
537 | my $pi = $side*(2**($iter+2)); | |
fdb7e2a2 NC |
538 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
539 | is((sprintf "%f", $pi), '3.182598'); | |
ee239bfe IZ |
540 | } |
541 | ||
542 | { | |
543 | my ($a, $b); | |
544 | symbolic->vars($a, $b); | |
545 | my $c = sqrt($a**2 + $b**2); | |
546 | $a = 3; $b = 4; | |
fdb7e2a2 | 547 | is((sprintf "%d", $c), '5'); |
ee239bfe | 548 | $a = 12; $b = 5; |
fdb7e2a2 | 549 | is((sprintf "%d", $c), '13'); |
ee239bfe IZ |
550 | } |
551 | ||
552 | { | |
553 | package symbolic1; # Primitive symbolic calculator | |
554 | # Mutator inc/dec | |
555 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, '=' => \&cpy; | |
556 | ||
557 | sub new { shift; bless ['n', @_] } | |
558 | sub cpy { | |
559 | my $self = shift; | |
560 | bless [@$self], ref $self; | |
561 | } | |
562 | sub wrap { | |
563 | my ($obj, $other, $inv, $meth) = @_; | |
564 | if ($meth eq '++' or $meth eq '--') { | |
565 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference | |
566 | return $obj; | |
567 | } | |
568 | ($obj, $other) = ($other, $obj) if $inv; | |
569 | bless [$meth, $obj, $other]; | |
570 | } | |
571 | sub str { | |
572 | my ($meth, $a, $b) = @{+shift}; | |
573 | $a = 'u' unless defined $a; | |
574 | if (defined $b) { | |
575 | "[$meth $a $b]"; | |
576 | } else { | |
577 | "[$meth $a]"; | |
578 | } | |
579 | } | |
580 | my %subr = ( 'n' => sub {$_[0]} ); | |
581 | foreach my $op (split " ", $overload::ops{with_assign}) { | |
582 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; | |
583 | } | |
584 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); | |
585 | foreach my $op (split " ", "@overload::ops{ @bins }") { | |
586 | $subr{$op} = eval "sub {shift() $op shift()}"; | |
587 | } | |
588 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { | |
589 | $subr{$op} = eval "sub {$op shift()}"; | |
590 | } | |
591 | $subr{'++'} = $subr{'+'}; | |
592 | $subr{'--'} = $subr{'-'}; | |
593 | ||
594 | sub num { | |
595 | my ($meth, $a, $b) = @{+shift}; | |
596 | my $subr = $subr{$meth} | |
597 | or die "Do not know how to ($meth) in symbolic"; | |
598 | $a = $a->num if ref $a eq __PACKAGE__; | |
599 | $b = $b->num if ref $b eq __PACKAGE__; | |
600 | $subr->($a,$b); | |
601 | } | |
602 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } | |
603 | sub FETCH { shift } | |
604 | sub nop { } # Around a bug | |
605 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; } | |
606 | sub STORE { | |
607 | my $obj = shift; | |
608 | $#$obj = 1; | |
a1063b2d | 609 | $obj->[1] = shift; |
ee239bfe IZ |
610 | } |
611 | } | |
612 | ||
613 | { | |
614 | my $foo = new symbolic1 11; | |
615 | my $baz = $foo++; | |
fdb7e2a2 NC |
616 | is((sprintf "%d", $foo), '12'); |
617 | is((sprintf "%d", $baz), '11'); | |
ee239bfe IZ |
618 | my $bar = $foo; |
619 | $baz = ++$foo; | |
fdb7e2a2 NC |
620 | is((sprintf "%d", $foo), '13'); |
621 | is((sprintf "%d", $bar), '12'); | |
622 | is((sprintf "%d", $baz), '13'); | |
ee239bfe IZ |
623 | my $ban = $foo; |
624 | $baz = ($foo += 1); | |
fdb7e2a2 NC |
625 | is((sprintf "%d", $foo), '14'); |
626 | is((sprintf "%d", $bar), '12'); | |
627 | is((sprintf "%d", $baz), '14'); | |
628 | is((sprintf "%d", $ban), '13'); | |
ee239bfe IZ |
629 | $baz = 0; |
630 | $baz = $foo++; | |
fdb7e2a2 NC |
631 | is((sprintf "%d", $foo), '15'); |
632 | is((sprintf "%d", $baz), '14'); | |
633 | is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]'); | |
ee239bfe IZ |
634 | } |
635 | ||
636 | { | |
637 | my $iter = new symbolic1 2; | |
638 | my $side = new symbolic1 1; | |
639 | my $cnt = $iter; | |
640 | ||
641 | while ($cnt) { | |
642 | $cnt = $cnt - 1; # The "simple" way | |
643 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
644 | } | |
645 | my $pi = $side*(2**($iter+2)); | |
fdb7e2a2 NC |
646 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
647 | is((sprintf "%f", $pi), '3.182598'); | |
ee239bfe IZ |
648 | } |
649 | ||
650 | { | |
651 | my $iter = new symbolic1 2; | |
652 | my $side = new symbolic1 1; | |
653 | my $cnt = $iter; | |
654 | ||
655 | while ($cnt--) { | |
656 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
657 | } | |
658 | my $pi = $side*(2**($iter+2)); | |
fdb7e2a2 NC |
659 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
660 | is((sprintf "%f", $pi), '3.182598'); | |
ee239bfe IZ |
661 | } |
662 | ||
663 | { | |
664 | my ($a, $b); | |
665 | symbolic1->vars($a, $b); | |
666 | my $c = sqrt($a**2 + $b**2); | |
667 | $a = 3; $b = 4; | |
fdb7e2a2 | 668 | is((sprintf "%d", $c), '5'); |
ee239bfe | 669 | $a = 12; $b = 5; |
fdb7e2a2 | 670 | is((sprintf "%d", $c), '13'); |
ee239bfe IZ |
671 | } |
672 | ||
673 | { | |
674 | package two_face; # Scalars with separate string and | |
675 | # numeric values. | |
676 | sub new { my $p = shift; bless [@_], $p } | |
677 | use overload '""' => \&str, '0+' => \&num, fallback => 1; | |
678 | sub num {shift->[1]} | |
679 | sub str {shift->[0]} | |
680 | } | |
681 | ||
682 | { | |
683 | my $seven = new two_face ("vii", 7); | |
fdb7e2a2 | 684 | is((sprintf "seven=$seven, seven=%d, eight=%d", $seven, $seven+1), |
ee239bfe | 685 | 'seven=vii, seven=7, eight=8'); |
fdb7e2a2 | 686 | is(scalar ($seven =~ /i/), '1'); |
ee239bfe | 687 | } |
b3ac6de7 | 688 | |
d0ecd44c IZ |
689 | { |
690 | package sorting; | |
691 | use overload 'cmp' => \∁ | |
692 | sub new { my ($p, $v) = @_; bless \$v, $p } | |
693 | sub comp { my ($x,$y) = @_; ($$x * 3 % 10) <=> ($$y * 3 % 10) or $$x cmp $$y } | |
694 | } | |
695 | { | |
696 | my @arr = map sorting->new($_), 0..12; | |
697 | my @sorted1 = sort @arr; | |
698 | my @sorted2 = map $$_, @sorted1; | |
7bf00c86 | 699 | is("@sorted2", '0 10 7 4 1 11 8 5 12 2 9 6 3'); |
d0ecd44c | 700 | } |
f5284f61 IZ |
701 | { |
702 | package iterator; | |
703 | use overload '<>' => \&iter; | |
704 | sub new { my ($p, $v) = @_; bless \$v, $p } | |
705 | sub iter { my ($x) = @_; return undef if $$x < 0; return $$x--; } | |
706 | } | |
72b16652 GS |
707 | |
708 | # XXX iterator overload not intended to work with CORE::GLOBAL? | |
709 | if (defined &CORE::GLOBAL::glob) { | |
7bf00c86 NC |
710 | is('1', '1'); |
711 | is('1', '1'); | |
712 | is('1', '1'); | |
72b16652 GS |
713 | } |
714 | else { | |
f5284f61 IZ |
715 | my $iter = iterator->new(5); |
716 | my $acc = ''; | |
717 | my $out; | |
718 | $acc .= " $out" while $out = <${iter}>; | |
7bf00c86 | 719 | is($acc, ' 5 4 3 2 1 0'); |
f5284f61 | 720 | $iter = iterator->new(5); |
7bf00c86 | 721 | is(scalar <${iter}>, '5'); |
f5284f61 | 722 | $acc = ''; |
b04ef359 | 723 | $acc .= " $out" while $out = <$iter>; |
7bf00c86 | 724 | is($acc, ' 4 3 2 1 0'); |
f5284f61 IZ |
725 | } |
726 | { | |
727 | package deref; | |
728 | use overload '%{}' => \&hderef, '&{}' => \&cderef, | |
729 | '*{}' => \&gderef, '${}' => \&sderef, '@{}' => \&aderef; | |
730 | sub new { my ($p, $v) = @_; bless \$v, $p } | |
731 | sub deref { | |
732 | my ($self, $key) = (shift, shift); | |
733 | my $class = ref $self; | |
734 | bless $self, 'deref::dummy'; # Disable overloading of %{} | |
735 | my $out = $self->{$key}; | |
736 | bless $self, $class; # Restore overloading | |
737 | $out; | |
738 | } | |
739 | sub hderef {shift->deref('h')} | |
740 | sub aderef {shift->deref('a')} | |
741 | sub cderef {shift->deref('c')} | |
742 | sub gderef {shift->deref('g')} | |
743 | sub sderef {shift->deref('s')} | |
744 | } | |
745 | { | |
746 | my $deref = bless { h => { foo => 5 , fake => 23 }, | |
747 | c => sub {return shift() + 34}, | |
748 | 's' => \123, | |
749 | a => [11..13], | |
750 | g => \*srt, | |
751 | }, 'deref'; | |
752 | # Hash: | |
753 | my @cont = sort %$deref; | |
b0bf6df7 | 754 | if ("\t" eq "\011") { # ASCII |
7bf00c86 | 755 | is("@cont", '23 5 fake foo'); |
f70c35af | 756 | } |
b0bf6df7 | 757 | else { # EBCDIC alpha-numeric sort order |
7bf00c86 | 758 | is("@cont", 'fake foo 23 5'); |
f70c35af | 759 | } |
f5284f61 | 760 | my @keys = sort keys %$deref; |
7bf00c86 | 761 | is("@keys", 'fake foo'); |
f5284f61 | 762 | my @val = sort values %$deref; |
7bf00c86 NC |
763 | is("@val", '23 5'); |
764 | is($deref->{foo}, 5); | |
765 | is(defined $deref->{bar}, ''); | |
f5284f61 IZ |
766 | my $key; |
767 | @keys = (); | |
768 | push @keys, $key while $key = each %$deref; | |
769 | @keys = sort @keys; | |
7bf00c86 NC |
770 | is("@keys", 'fake foo'); |
771 | is(exists $deref->{bar}, ''); | |
772 | is(exists $deref->{foo}, 1); | |
f5284f61 | 773 | # Code: |
7bf00c86 NC |
774 | is($deref->(5), 39); |
775 | is(&$deref(6), 40); | |
f5284f61 | 776 | sub xxx_goto { goto &$deref } |
7bf00c86 | 777 | is(xxx_goto(7), 41); |
f5284f61 IZ |
778 | my $srt = bless { c => sub {$b <=> $a} |
779 | }, 'deref'; | |
780 | *srt = \&$srt; | |
781 | my @sorted = sort srt 11, 2, 5, 1, 22; | |
7bf00c86 | 782 | is("@sorted", '22 11 5 2 1'); |
f5284f61 | 783 | # Scalar |
7bf00c86 | 784 | is($$deref, 123); |
c6e96bcb GS |
785 | # Code |
786 | @sorted = sort $srt 11, 2, 5, 1, 22; | |
7bf00c86 | 787 | is("@sorted", '22 11 5 2 1'); |
f5284f61 | 788 | # Array |
7bf00c86 NC |
789 | is("@$deref", '11 12 13'); |
790 | is($#$deref, '2'); | |
f5284f61 | 791 | my $l = @$deref; |
7bf00c86 NC |
792 | is($l, 3); |
793 | is($deref->[2], '13'); | |
f5284f61 | 794 | $l = pop @$deref; |
7bf00c86 | 795 | is($l, 13); |
f5284f61 | 796 | $l = 1; |
7bf00c86 | 797 | is($deref->[$l], '12'); |
f5284f61 IZ |
798 | # Repeated dereference |
799 | my $double = bless { h => $deref, | |
800 | }, 'deref'; | |
7bf00c86 | 801 | is($double->{foo}, 5); |
f5284f61 IZ |
802 | } |
803 | ||
804 | { | |
805 | package two_refs; | |
806 | use overload '%{}' => \&gethash, '@{}' => sub { ${shift()} }; | |
807 | sub new { | |
808 | my $p = shift; | |
809 | bless \ [@_], $p; | |
810 | } | |
811 | sub gethash { | |
812 | my %h; | |
813 | my $self = shift; | |
814 | tie %h, ref $self, $self; | |
815 | \%h; | |
816 | } | |
817 | ||
818 | sub TIEHASH { my $p = shift; bless \ shift, $p } | |
819 | my %fields; | |
820 | my $i = 0; | |
821 | $fields{$_} = $i++ foreach qw{zero one two three}; | |
822 | sub STORE { | |
823 | my $self = ${shift()}; | |
824 | my $key = $fields{shift()}; | |
825 | defined $key or die "Out of band access"; | |
826 | $$self->[$key] = shift; | |
827 | } | |
828 | sub FETCH { | |
829 | my $self = ${shift()}; | |
830 | my $key = $fields{shift()}; | |
831 | defined $key or die "Out of band access"; | |
832 | $$self->[$key]; | |
833 | } | |
834 | } | |
835 | ||
836 | my $bar = new two_refs 3,4,5,6; | |
837 | $bar->[2] = 11; | |
7bf00c86 | 838 | is($bar->{two}, 11); |
f5284f61 | 839 | $bar->{three} = 13; |
7bf00c86 | 840 | is($bar->[3], 13); |
f5284f61 IZ |
841 | |
842 | { | |
843 | package two_refs_o; | |
844 | @ISA = ('two_refs'); | |
845 | } | |
846 | ||
847 | $bar = new two_refs_o 3,4,5,6; | |
848 | $bar->[2] = 11; | |
7bf00c86 | 849 | is($bar->{two}, 11); |
f5284f61 | 850 | $bar->{three} = 13; |
7bf00c86 | 851 | is($bar->[3], 13); |
f5284f61 IZ |
852 | |
853 | { | |
854 | package two_refs1; | |
855 | use overload '%{}' => sub { ${shift()}->[1] }, | |
856 | '@{}' => sub { ${shift()}->[0] }; | |
857 | sub new { | |
858 | my $p = shift; | |
859 | my $a = [@_]; | |
860 | my %h; | |
861 | tie %h, $p, $a; | |
862 | bless \ [$a, \%h], $p; | |
863 | } | |
864 | sub gethash { | |
865 | my %h; | |
866 | my $self = shift; | |
867 | tie %h, ref $self, $self; | |
868 | \%h; | |
869 | } | |
870 | ||
871 | sub TIEHASH { my $p = shift; bless \ shift, $p } | |
872 | my %fields; | |
873 | my $i = 0; | |
874 | $fields{$_} = $i++ foreach qw{zero one two three}; | |
875 | sub STORE { | |
876 | my $a = ${shift()}; | |
877 | my $key = $fields{shift()}; | |
878 | defined $key or die "Out of band access"; | |
879 | $a->[$key] = shift; | |
880 | } | |
881 | sub FETCH { | |
882 | my $a = ${shift()}; | |
883 | my $key = $fields{shift()}; | |
884 | defined $key or die "Out of band access"; | |
885 | $a->[$key]; | |
886 | } | |
887 | } | |
888 | ||
889 | $bar = new two_refs_o 3,4,5,6; | |
890 | $bar->[2] = 11; | |
7bf00c86 | 891 | is($bar->{two}, 11); |
f5284f61 | 892 | $bar->{three} = 13; |
7bf00c86 | 893 | is($bar->[3], 13); |
f5284f61 IZ |
894 | |
895 | { | |
896 | package two_refs1_o; | |
897 | @ISA = ('two_refs1'); | |
898 | } | |
899 | ||
900 | $bar = new two_refs1_o 3,4,5,6; | |
901 | $bar->[2] = 11; | |
7bf00c86 | 902 | is($bar->{two}, 11); |
f5284f61 | 903 | $bar->{three} = 13; |
7bf00c86 | 904 | is($bar->[3], 13); |
f5284f61 | 905 | |
fe7ac86a IZ |
906 | { |
907 | package B; | |
908 | use overload bool => sub { ${+shift} }; | |
909 | } | |
910 | ||
911 | my $aaa; | |
912 | { my $bbbb = 0; $aaa = bless \$bbbb, B } | |
913 | ||
7bf00c86 | 914 | is !$aaa, 1; |
fe7ac86a IZ |
915 | |
916 | unless ($aaa) { | |
7bf00c86 | 917 | pass(); |
fe7ac86a | 918 | } else { |
7bf00c86 | 919 | fail(); |
fe7ac86a IZ |
920 | } |
921 | ||
1426bbf4 MG |
922 | # check that overload isn't done twice by join |
923 | { my $c = 0; | |
924 | package Join; | |
925 | use overload '""' => sub { $c++ }; | |
926 | my $x = join '', bless([]), 'pq', bless([]); | |
7bf00c86 | 927 | main::is $x, '0pq1'; |
1426bbf4 | 928 | }; |
fe7ac86a | 929 | |
4498a751 PM |
930 | # Test module-specific warning |
931 | { | |
932 | # check the Odd number of arguments for overload::constant warning | |
933 | my $a = "" ; | |
0a911d86 | 934 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
4498a751 | 935 | $x = eval ' overload::constant "integer" ; ' ; |
7bf00c86 | 936 | is($a, ""); |
4498a751 PM |
937 | use warnings 'overload' ; |
938 | $x = eval ' overload::constant "integer" ; ' ; | |
7bf00c86 | 939 | like($a, qr/^Odd number of arguments for overload::constant at/); |
4498a751 PM |
940 | } |
941 | ||
942 | { | |
943 | # check the `$_[0]' is not an overloadable type warning | |
944 | my $a = "" ; | |
0a911d86 | 945 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
4498a751 | 946 | $x = eval ' overload::constant "fred" => sub {} ; ' ; |
7bf00c86 | 947 | is($a, ""); |
4498a751 PM |
948 | use warnings 'overload' ; |
949 | $x = eval ' overload::constant "fred" => sub {} ; ' ; | |
7bf00c86 | 950 | like($a, qr/^`fred' is not an overloadable type at/); |
4498a751 PM |
951 | } |
952 | ||
953 | { | |
954 | # check the `$_[1]' is not a code reference warning | |
955 | my $a = "" ; | |
0a911d86 | 956 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
4498a751 | 957 | $x = eval ' overload::constant "integer" => 1; ' ; |
7bf00c86 | 958 | is($a, ""); |
4498a751 PM |
959 | use warnings 'overload' ; |
960 | $x = eval ' overload::constant "integer" => 1; ' ; | |
7bf00c86 | 961 | like($a, qr/^`1' is not a code reference at/); |
4498a751 PM |
962 | } |
963 | ||
78f67eb5 JH |
964 | { |
965 | my $c = 0; | |
966 | package ov_int1; | |
967 | use overload '""' => sub { 3+shift->[0] }, | |
968 | '0+' => sub { 10+shift->[0] }, | |
969 | 'int' => sub { 100+shift->[0] }; | |
970 | sub new {my $p = shift; bless [shift], $p} | |
971 | ||
972 | package ov_int2; | |
973 | use overload '""' => sub { 5+shift->[0] }, | |
974 | '0+' => sub { 30+shift->[0] }, | |
975 | 'int' => sub { 'ov_int1'->new(1000+shift->[0]) }; | |
976 | sub new {my $p = shift; bless [shift], $p} | |
977 | ||
978 | package noov_int; | |
979 | use overload '""' => sub { 2+shift->[0] }, | |
980 | '0+' => sub { 9+shift->[0] }; | |
981 | sub new {my $p = shift; bless [shift], $p} | |
982 | ||
983 | package main; | |
984 | ||
985 | my $x = new noov_int 11; | |
986 | my $int_x = int $x; | |
7bf00c86 | 987 | main::is("$int_x", 20); |
78f67eb5 JH |
988 | $x = new ov_int1 31; |
989 | $int_x = int $x; | |
7bf00c86 | 990 | main::is("$int_x", 131); |
78f67eb5 JH |
991 | $x = new ov_int2 51; |
992 | $int_x = int $x; | |
7bf00c86 | 993 | main::is("$int_x", 1054); |
78f67eb5 JH |
994 | } |
995 | ||
b0bf6df7 | 996 | # make sure that we don't infinitely recurse |
1554e226 DC |
997 | { |
998 | my $c = 0; | |
999 | package Recurse; | |
1000 | use overload '""' => sub { shift }, | |
1001 | '0+' => sub { shift }, | |
1002 | 'bool' => sub { shift }, | |
1003 | fallback => 1; | |
1004 | my $x = bless([]); | |
7bf00c86 NC |
1005 | # For some reason beyond me these have to be oks rather than likes. |
1006 | main::ok("$x" =~ /Recurse=ARRAY/); | |
1007 | main::ok($x); | |
1008 | main::ok($x+0 =~ qr/Recurse=ARRAY/); | |
11e3e2e4 | 1009 | } |
78f67eb5 | 1010 | |
1dc13c17 SC |
1011 | # BugID 20010422.003 |
1012 | package Foo; | |
1013 | ||
1014 | use overload | |
1015 | 'bool' => sub { return !$_[0]->is_zero() || undef; } | |
1016 | ; | |
1017 | ||
1018 | sub is_zero | |
1019 | { | |
1020 | my $self = shift; | |
1021 | return $self->{var} == 0; | |
1022 | } | |
1023 | ||
1024 | sub new | |
1025 | { | |
1026 | my $class = shift; | |
1027 | my $self = {}; | |
1028 | $self->{var} = shift; | |
1029 | bless $self,$class; | |
1030 | } | |
1031 | ||
1032 | package main; | |
1033 | ||
1034 | use strict; | |
1035 | ||
1036 | my $r = Foo->new(8); | |
1037 | $r = Foo->new(0); | |
78f67eb5 | 1038 | |
11e3e2e4 | 1039 | is(($r || 0), 0); |
1554e226 | 1040 | |
6050d10e JP |
1041 | package utf8_o; |
1042 | ||
1043 | use overload | |
1044 | '""' => sub { return $_[0]->{var}; } | |
1045 | ; | |
1046 | ||
1047 | sub new | |
1048 | { | |
1049 | my $class = shift; | |
1050 | my $self = {}; | |
1051 | $self->{var} = shift; | |
1052 | bless $self,$class; | |
1053 | } | |
1054 | ||
1055 | package main; | |
1056 | ||
1057 | ||
1058 | my $utfvar = new utf8_o 200.2.1; | |
11e3e2e4 NC |
1059 | is("$utfvar", 200.2.1); # 223 - stringify |
1060 | is("a$utfvar", "a".200.2.1); # 224 - overload via sv_2pv_flags | |
6050d10e | 1061 | |
446eaa42 | 1062 | # 225..227 -- more %{} tests. Hangs in 5.6.0, okay in later releases. |
41cb1005 JH |
1063 | # Basically this example implements strong encapsulation: if Hderef::import() |
1064 | # were to eval the overload code in the caller's namespace, the privatisation | |
1065 | # would be quite transparent. | |
1066 | package Hderef; | |
1067 | use overload '%{}' => sub { (caller(0))[0] eq 'Foo' ? $_[0] : die "zap" }; | |
1068 | package Foo; | |
1069 | @Foo::ISA = 'Hderef'; | |
1070 | sub new { bless {}, shift } | |
1071 | sub xet { @_ == 2 ? $_[0]->{$_[1]} : | |
1072 | @_ == 3 ? ($_[0]->{$_[1]} = $_[2]) : undef } | |
1073 | package main; | |
1074 | my $a = Foo->new; | |
1075 | $a->xet('b', 42); | |
11e3e2e4 NC |
1076 | is ($a->xet('b'), 42); |
1077 | ok (!defined eval { $a->{b} }); | |
1078 | like ($@, qr/zap/); | |
41cb1005 | 1079 | |
29ddfe35 RD |
1080 | { |
1081 | package t229; | |
1082 | use overload '=' => sub { 42 }, | |
1083 | '++' => sub { my $x = ${$_[0]}; $_[0] }; | |
1084 | sub new { my $x = 42; bless \$x } | |
1085 | ||
1086 | my $warn; | |
1087 | { | |
1088 | local $SIG{__WARN__} = sub { $warn++ }; | |
1089 | my $x = t229->new; | |
1090 | my $y = $x; | |
1091 | eval { $y++ }; | |
1092 | } | |
11e3e2e4 | 1093 | main::ok (!$warn); |
61f33854 RGS |
1094 | } |
1095 | ||
1096 | { | |
1097 | my ($int, $out1, $out2); | |
1098 | { | |
1099 | BEGIN { $int = 0; overload::constant 'integer' => sub {$int++; 17}; } | |
1100 | $out1 = 0; | |
1101 | $out2 = 1; | |
1102 | } | |
11e3e2e4 NC |
1103 | is($int, 2, "#24313"); # 230 |
1104 | is($out1, 17, "#24313"); # 231 | |
1105 | is($out2, 17, "#24313"); # 232 | |
29ddfe35 RD |
1106 | } |
1107 | ||
0bdaccee NC |
1108 | { |
1109 | package Numify; | |
1110 | use overload (qw(0+ numify fallback 1)); | |
1111 | ||
1112 | sub new { | |
1113 | my $val = $_[1]; | |
1114 | bless \$val, $_[0]; | |
1115 | } | |
1116 | ||
1117 | sub numify { ${$_[0]} } | |
1118 | } | |
1119 | ||
d411a6a9 RD |
1120 | { |
1121 | package perl31793; | |
1b1d102f RD |
1122 | use overload cmp => sub { 0 }; |
1123 | package perl31793_fb; | |
76c43448 | 1124 | use overload cmp => sub { 0 }, fallback => 1; |
d411a6a9 RD |
1125 | package main; |
1126 | my $o = bless [], 'perl31793'; | |
1b1d102f | 1127 | my $of = bless [], 'perl31793_fb'; |
d411a6a9 | 1128 | my $no = bless [], 'no_overload'; |
11e3e2e4 NC |
1129 | like(overload::StrVal(\"scalar"), qr/^SCALAR\(0x[0-9a-f]+\)$/); |
1130 | like(overload::StrVal([]), qr/^ARRAY\(0x[0-9a-f]+\)$/); | |
1131 | like(overload::StrVal({}), qr/^HASH\(0x[0-9a-f]+\)$/); | |
1132 | like(overload::StrVal(sub{1}), qr/^CODE\(0x[0-9a-f]+\)$/); | |
1133 | like(overload::StrVal(\*GLOB), qr/^GLOB\(0x[0-9a-f]+\)$/); | |
1134 | like(overload::StrVal(\$o), qr/^REF\(0x[0-9a-f]+\)$/); | |
0fc92fc6 | 1135 | like(overload::StrVal(qr/a/), qr/^Regexp=REGEXP\(0x[0-9a-f]+\)$/); |
11e3e2e4 NC |
1136 | like(overload::StrVal($o), qr/^perl31793=ARRAY\(0x[0-9a-f]+\)$/); |
1137 | like(overload::StrVal($of), qr/^perl31793_fb=ARRAY\(0x[0-9a-f]+\)$/); | |
1138 | like(overload::StrVal($no), qr/^no_overload=ARRAY\(0x[0-9a-f]+\)$/); | |
d411a6a9 RD |
1139 | } |
1140 | ||
b0bf6df7 | 1141 | # These are all check that overloaded values rather than reference addresses |
0bdaccee NC |
1142 | # are what is getting tested. |
1143 | my ($two, $one, $un, $deux) = map {new Numify $_} 2, 1, 1, 2; | |
1144 | my ($ein, $zwei) = (1, 2); | |
1145 | ||
1146 | my %map = (one => 1, un => 1, ein => 1, deux => 2, two => 2, zwei => 2); | |
1147 | foreach my $op (qw(<=> == != < <= > >=)) { | |
1148 | foreach my $l (keys %map) { | |
1149 | foreach my $r (keys %map) { | |
1150 | my $ocode = "\$$l $op \$$r"; | |
1151 | my $rcode = "$map{$l} $op $map{$r}"; | |
1152 | ||
1153 | my $got = eval $ocode; | |
1154 | die if $@; | |
1155 | my $expect = eval $rcode; | |
1156 | die if $@; | |
11e3e2e4 | 1157 | is ($got, $expect, $ocode) or print "# $rcode\n"; |
0bdaccee NC |
1158 | } |
1159 | } | |
1160 | } | |
131b3ad0 DM |
1161 | { |
1162 | # check that overloading works in regexes | |
1163 | { | |
1164 | package Foo493; | |
1165 | use overload | |
1166 | '""' => sub { "^$_[0][0]\$" }, | |
1167 | '.' => sub { | |
1168 | bless [ | |
1169 | $_[2] | |
1170 | ? (ref $_[1] ? $_[1][0] : $_[1]) . ':' .$_[0][0] | |
1171 | : $_[0][0] . ':' . (ref $_[1] ? $_[1][0] : $_[1]) | |
1172 | ], 'Foo493' | |
1173 | }; | |
1174 | } | |
1175 | ||
1176 | my $a = bless [ "a" ], 'Foo493'; | |
11e3e2e4 NC |
1177 | like('a', qr/$a/); |
1178 | like('x:a', qr/x$a/); | |
1179 | like('x:a:=', qr/x$a=$/); | |
1180 | like('x:a:a:=', qr/x$a$a=$/); | |
131b3ad0 DM |
1181 | |
1182 | } | |
1183 | ||
705c898c | 1184 | { |
d4b87e75 BM |
1185 | { |
1186 | package QRonly; | |
1187 | use overload qr => sub { qr/x/ }, fallback => 1; | |
1188 | } | |
1189 | { | |
1190 | my $x = bless [], "QRonly"; | |
1191 | ||
1192 | # like tries to be too clever, and decides that $x-stringified | |
1193 | # doesn't look like a regex | |
1194 | ok("x" =~ $x, "qr-only matches"); | |
e4eea578 | 1195 | ok("y" !~ $x, "qr-only doesn't match what it shouldn't"); |
d4b87e75 | 1196 | ok("xx" =~ /x$x/, "qr-only matches with concat"); |
e4eea578 | 1197 | like("$x", qr/^QRonly=ARRAY/, "qr-only doesn't have string overload"); |
d4b87e75 BM |
1198 | |
1199 | my $qr = bless qr/y/, "QRonly"; | |
1200 | ok("x" =~ $qr, "qr with qr-overload uses overload"); | |
e4eea578 | 1201 | ok("y" !~ $qr, "qr with qr-overload uses overload"); |
d4b87e75 BM |
1202 | is("$qr", "".qr/y/, "qr with qr-overload stringify"); |
1203 | ||
1204 | my $rx = $$qr; | |
1205 | ok("y" =~ $rx, "bare rx with qr-overload doesn't overload match"); | |
e4eea578 | 1206 | ok("x" !~ $rx, "bare rx with qr-overload doesn't overload match"); |
d4b87e75 BM |
1207 | is("$rx", "".qr/y/, "bare rx with qr-overload stringify"); |
1208 | } | |
1209 | { | |
1210 | package QRandSTR; | |
1211 | use overload qr => sub { qr/x/ }, q/""/ => sub { "y" }; | |
1212 | } | |
1213 | { | |
1214 | my $x = bless [], "QRandSTR"; | |
1215 | ok("x" =~ $x, "qr+str uses qr for match"); | |
e4eea578 | 1216 | ok("y" !~ $x, "qr+str uses qr for match"); |
d4b87e75 BM |
1217 | ok("xx" =~ /x$x/, "qr+str uses qr for match with concat"); |
1218 | is("$x", "y", "qr+str uses str for stringify"); | |
1219 | ||
1220 | my $qr = bless qr/z/, "QRandSTR"; | |
1221 | is("$qr", "y", "qr with qr+str uses str for stringify"); | |
1222 | ok("xx" =~ /x$x/, "qr with qr+str uses qr for match"); | |
1223 | ||
1224 | my $rx = $$qr; | |
1225 | ok("z" =~ $rx, "bare rx with qr+str doesn't overload match"); | |
1226 | is("$rx", "".qr/z/, "bare rx with qr+str doesn't overload stringify"); | |
1227 | } | |
1228 | { | |
1229 | package QRany; | |
1230 | use overload qr => sub { $_[0]->(@_) }; | |
1231 | ||
1232 | package QRself; | |
1233 | use overload qr => sub { $_[0] }; | |
1234 | } | |
1235 | { | |
1236 | my $rx = bless sub { ${ qr/x/ } }, "QRany"; | |
e4eea578 RGS |
1237 | ok("x" =~ $rx, "qr overload accepts a bare rx"); |
1238 | ok("y" !~ $rx, "qr overload accepts a bare rx"); | |
d4b87e75 BM |
1239 | |
1240 | my $str = bless sub { "x" }, "QRany"; | |
1241 | ok(!eval { "x" =~ $str }, "qr overload doesn't accept a string"); | |
e4eea578 | 1242 | like($@, qr/^Overloaded qr did not return a REGEXP/, "correct error"); |
d4b87e75 BM |
1243 | |
1244 | my $oqr = bless qr/z/, "QRandSTR"; | |
1245 | my $oqro = bless sub { $oqr }, "QRany"; | |
e4eea578 | 1246 | ok("z" =~ $oqro, "qr overload doesn't recurse"); |
d4b87e75 BM |
1247 | |
1248 | my $qrs = bless qr/z/, "QRself"; | |
e4eea578 | 1249 | ok("z" =~ $qrs, "qr overload can return self"); |
d4b87e75 BM |
1250 | } |
1251 | { | |
1252 | package STRonly; | |
1253 | use overload q/""/ => sub { "x" }; | |
1254 | ||
1255 | package STRonlyFB; | |
1256 | use overload q/""/ => sub { "x" }, fallback => 1; | |
1257 | } | |
1258 | { | |
1259 | my $fb = bless [], "STRonlyFB"; | |
e4eea578 RGS |
1260 | ok("x" =~ $fb, "qr falls back to \"\""); |
1261 | ok("y" !~ $fb, "qr falls back to \"\""); | |
d4b87e75 BM |
1262 | |
1263 | my $nofb = bless [], "STRonly"; | |
e4eea578 RGS |
1264 | ok("x" =~ $nofb, "qr falls back even without fallback"); |
1265 | ok("y" !~ $nofb, "qr falls back even without fallback"); | |
d4b87e75 BM |
1266 | } |
1267 | } | |
1268 | ||
1269 | { | |
705c898c RH |
1270 | my $twenty_three = 23; |
1271 | # Check that constant overloading propagates into evals | |
1272 | BEGIN { overload::constant integer => sub { 23 } } | |
11e3e2e4 | 1273 | is(eval "17", $twenty_three); |
705c898c | 1274 | } |
dd2eae66 NC |
1275 | |
1276 | { | |
1277 | package Sklorsh; | |
1278 | use overload | |
1279 | bool => sub { shift->is_cool }; | |
1280 | ||
1281 | sub is_cool { | |
1282 | $_[0]->{name} eq 'cool'; | |
1283 | } | |
1284 | ||
1285 | sub delete { | |
1286 | undef %{$_[0]}; | |
1287 | bless $_[0], 'Brap'; | |
1288 | return 1; | |
1289 | } | |
1290 | ||
1291 | sub delete_with_self { | |
1292 | my $self = shift; | |
1293 | undef %$self; | |
1294 | bless $self, 'Brap'; | |
1295 | return 1; | |
1296 | } | |
1297 | ||
1298 | package Brap; | |
1299 | ||
1300 | 1; | |
1301 | ||
1302 | package main; | |
1303 | ||
1304 | my $obj; | |
1305 | $obj = bless {name => 'cool'}, 'Sklorsh'; | |
1306 | $obj->delete; | |
b0bf6df7 | 1307 | ok(eval {if ($obj) {1}; 1}, $@ || 'reblessed into nonexistent namespace'); |
dd2eae66 NC |
1308 | |
1309 | $obj = bless {name => 'cool'}, 'Sklorsh'; | |
1310 | $obj->delete_with_self; | |
1311 | ok (eval {if ($obj) {1}; 1}, $@); | |
1312 | ||
1313 | my $a = $b = {name => 'hot'}; | |
1314 | bless $b, 'Sklorsh'; | |
1315 | is(ref $a, 'Sklorsh'); | |
1316 | is(ref $b, 'Sklorsh'); | |
1317 | ok(!$b, "Expect overloaded boolean"); | |
1318 | ok(!$a, "Expect overloaded boolean"); | |
1319 | } | |
edbe35ea VP |
1320 | |
1321 | { | |
1322 | package Flrbbbbb; | |
1323 | use overload | |
1324 | bool => sub { shift->{truth} eq 'yes' }, | |
1325 | '0+' => sub { shift->{truth} eq 'yes' ? '1' : '0' }, | |
1326 | '!' => sub { shift->{truth} eq 'no' }, | |
1327 | fallback => 1; | |
1328 | ||
1329 | sub new { my $class = shift; bless { truth => shift }, $class } | |
1330 | ||
1331 | package main; | |
1332 | ||
1333 | my $yes = Flrbbbbb->new('yes'); | |
1334 | my $x; | |
1335 | $x = 1 if $yes; is($x, 1); | |
1336 | $x = 2 unless $yes; is($x, 1); | |
1337 | $x = 3 if !$yes; is($x, 1); | |
1338 | $x = 4 unless !$yes; is($x, 4); | |
1339 | ||
1340 | my $no = Flrbbbbb->new('no'); | |
1341 | $x = 0; | |
1342 | $x = 1 if $no; is($x, 0); | |
1343 | $x = 2 unless $no; is($x, 2); | |
1344 | $x = 3 if !$no; is($x, 3); | |
1345 | $x = 4 unless !$no; is($x, 3); | |
1346 | ||
1347 | $x = 0; | |
1348 | $x = 1 if !$no && $yes; is($x, 1); | |
1349 | $x = 2 unless !$no && $yes; is($x, 1); | |
1350 | $x = 3 if $no || !$yes; is($x, 1); | |
1351 | $x = 4 unless $no || !$yes; is($x, 4); | |
1352 | ||
1353 | $x = 0; | |
1354 | $x = 1 if !$no || !$yes; is($x, 1); | |
1355 | $x = 2 unless !$no || !$yes; is($x, 1); | |
1356 | $x = 3 if !$no && !$yes; is($x, 1); | |
1357 | $x = 4 unless !$no && !$yes; is($x, 4); | |
1358 | } | |
1359 | ||
2372186a NC |
1360 | { |
1361 | use Scalar::Util 'weaken'; | |
1362 | ||
1363 | package Shklitza; | |
1364 | use overload '""' => sub {"CLiK KLAK"}; | |
1365 | ||
1366 | package Ksshfwoom; | |
2372186a NC |
1367 | |
1368 | package main; | |
1369 | ||
1370 | my ($obj, $ref); | |
1371 | $obj = bless do {my $a; \$a}, 'Shklitza'; | |
1372 | $ref = $obj; | |
1373 | ||
1374 | is ($obj, "CLiK KLAK"); | |
1375 | is ($ref, "CLiK KLAK"); | |
1376 | ||
1377 | weaken $ref; | |
1378 | is ($ref, "CLiK KLAK"); | |
1379 | ||
1380 | bless $obj, 'Ksshfwoom'; | |
1381 | ||
cd75d542 NC |
1382 | like ($obj, qr/^Ksshfwoom=/); |
1383 | like ($ref, qr/^Ksshfwoom=/); | |
2372186a NC |
1384 | |
1385 | undef $obj; | |
1386 | is ($ref, undef); | |
1387 | } | |
6dd85743 AF |
1388 | |
1389 | { | |
1390 | package bit; | |
1391 | # bit operations have overloadable assignment variants too | |
1392 | ||
1393 | sub new { bless \$_[1], $_[0] } | |
1394 | ||
1395 | use overload | |
1396 | "&=" => sub { bit->new($_[0]->val . ' & ' . $_[1]->val) }, | |
1397 | "^=" => sub { bit->new($_[0]->val . ' ^ ' . $_[1]->val) }, | |
1398 | "|" => sub { bit->new($_[0]->val . ' | ' . $_[1]->val) }, # |= by fallback | |
1399 | ; | |
1400 | ||
1401 | sub val { ${$_[0]} } | |
1402 | ||
1403 | package main; | |
1404 | ||
1405 | my $a = bit->new(my $va = 'a'); | |
1406 | my $b = bit->new(my $vb = 'b'); | |
1407 | ||
1408 | $a &= $b; | |
1409 | is($a->val, 'a & b', "overloaded &= works"); | |
1410 | ||
1411 | my $c = bit->new(my $vc = 'c'); | |
1412 | ||
1413 | $b ^= $c; | |
1414 | is($b->val, 'b ^ c', "overloaded ^= works"); | |
1415 | ||
1416 | my $d = bit->new(my $vd = 'd'); | |
1417 | ||
1418 | $c |= $d; | |
1419 | is($c->val, 'c | d', "overloaded |= (by fallback) works"); | |
1420 | } | |
d11ee47c RD |
1421 | |
1422 | { | |
1423 | # comparison operators with nomethod | |
1424 | my $warning = ""; | |
1425 | my $method; | |
1426 | ||
1427 | package nomethod_false; | |
1428 | use overload nomethod => sub { $method = 'nomethod'; 0 }; | |
1429 | ||
1430 | package nomethod_true; | |
1431 | use overload nomethod => sub { $method= 'nomethod'; 'true' }; | |
1432 | ||
1433 | package main; | |
1434 | local $^W = 1; | |
1435 | local $SIG{__WARN__} = sub { $warning = $_[0] }; | |
1436 | ||
1437 | my $f = bless [], 'nomethod_false'; | |
1438 | ($warning, $method) = ("", ""); | |
1439 | is($f eq 'whatever', 0, 'nomethod makes eq return 0'); | |
1440 | is($method, 'nomethod'); | |
1441 | ||
1442 | my $t = bless [], 'nomethod_true'; | |
1443 | ($warning, $method) = ("", ""); | |
1444 | is($t eq 'whatever', 'true', 'nomethod makes eq return "true"'); | |
1445 | is($method, 'nomethod'); | |
1446 | is($warning, "", 'nomethod eq need not return number'); | |
1447 | ||
1448 | eval q{ | |
1449 | package nomethod_false; | |
1450 | use overload cmp => sub { $method = 'cmp'; 0 }; | |
1451 | }; | |
1452 | $f = bless [], 'nomethod_false'; | |
1453 | ($warning, $method) = ("", ""); | |
1454 | ok($f eq 'whatever', 'eq falls back to cmp (nomethod not called)'); | |
1455 | is($method, 'cmp'); | |
1456 | ||
1457 | eval q{ | |
1458 | package nomethod_true; | |
1459 | use overload cmp => sub { $method = 'cmp'; 'true' }; | |
1460 | }; | |
1461 | $t = bless [], 'nomethod_true'; | |
1462 | ($warning, $method) = ("", ""); | |
1463 | ok($t eq 'whatever', 'eq falls back to cmp (nomethod not called)'); | |
1464 | is($method, 'cmp'); | |
1465 | like($warning, qr/isn't numeric/, 'cmp should return number'); | |
1466 | ||
1467 | } | |
2c615c57 NC |
1468 | |
1469 | { | |
1470 | # Subtle bug pre 5.10, as a side effect of the overloading flag being | |
b0bf6df7 | 1471 | # stored on the reference rather than the referent. Despite the fact that |
2c615c57 | 1472 | # objects can only be accessed via references (even internally), the |
b0bf6df7 | 1473 | # referent actually knows that it's blessed, not the references. So taking |
2c615c57 NC |
1474 | # a new, unrelated, reference to it gives an object. However, the |
1475 | # overloading-or-not flag was on the reference prior to 5.10, and taking | |
1476 | # a new reference didn't (use to) copy it. | |
1477 | ||
1478 | package kayo; | |
1479 | ||
1480 | use overload '""' => sub {${$_[0]}}; | |
1481 | ||
1482 | sub Pie { | |
1483 | return "$_[0], $_[1]"; | |
1484 | } | |
1485 | ||
1486 | package main; | |
1487 | ||
1488 | my $class = 'kayo'; | |
1489 | my $string = 'bam'; | |
1490 | my $crunch_eth = bless \$string, $class; | |
1491 | ||
1492 | is("$crunch_eth", $string); | |
1493 | is ($crunch_eth->Pie("Meat"), "$string, Meat"); | |
1494 | ||
1495 | my $wham_eth = \$string; | |
1496 | ||
1497 | is("$wham_eth", $string, | |
1498 | 'This reference did not have overloading in 5.8.8 and earlier'); | |
1499 | is ($crunch_eth->Pie("Apple"), "$string, Apple"); | |
1500 | ||
1501 | my $class = ref $wham_eth; | |
1502 | $class =~ s/=.*//; | |
1503 | ||
1504 | # Bless it back into its own class! | |
1505 | bless $wham_eth, $class; | |
1506 | ||
1507 | is("$wham_eth", $string); | |
1508 | is ($crunch_eth->Pie("Blackbird"), "$string, Blackbird"); | |
1509 | } | |
c781a409 RD |
1510 | |
1511 | { | |
1512 | package numify_int; | |
1513 | use overload "0+" => sub { $_[0][0] += 1; 42 }; | |
1514 | package numify_self; | |
1515 | use overload "0+" => sub { $_[0][0]++; $_[0] }; | |
1516 | package numify_other; | |
1517 | use overload "0+" => sub { $_[0][0]++; $_[0][1] = bless [], 'numify_int' }; | |
e28bb1d5 | 1518 | package numify_by_fallback; |
800401ee | 1519 | use overload fallback => 1; |
c781a409 RD |
1520 | |
1521 | package main; | |
1522 | my $o = bless [], 'numify_int'; | |
1523 | is(int($o), 42, 'numifies to integer'); | |
1524 | is($o->[0], 1, 'int() numifies only once'); | |
1525 | ||
1526 | my $aref = []; | |
93521010 | 1527 | my $num_val = int($aref); |
c781a409 RD |
1528 | my $r = bless $aref, 'numify_self'; |
1529 | is(int($r), $num_val, 'numifies to self'); | |
1530 | is($r->[0], 1, 'int() numifies once when returning self'); | |
1531 | ||
1532 | my $s = bless [], 'numify_other'; | |
1533 | is(int($s), 42, 'numifies to numification of other object'); | |
1534 | is($s->[0], 1, 'int() numifies once when returning other object'); | |
1535 | is($s->[1][0], 1, 'returned object numifies too'); | |
e28bb1d5 RD |
1536 | |
1537 | my $m = bless $aref, 'numify_by_fallback'; | |
1538 | is(int($m), $num_val, 'numifies to usual reference value'); | |
800401ee JH |
1539 | is(abs($m), $num_val, 'numifies to usual reference value'); |
1540 | is(-$m, -$num_val, 'numifies to usual reference value'); | |
1541 | is(0+$m, $num_val, 'numifies to usual reference value'); | |
1542 | is($m+0, $num_val, 'numifies to usual reference value'); | |
1543 | is($m+$m, 2*$num_val, 'numifies to usual reference value'); | |
1544 | is(0-$m, -$num_val, 'numifies to usual reference value'); | |
1545 | is(1*$m, $num_val, 'numifies to usual reference value'); | |
1546 | is($m/1, $num_val, 'numifies to usual reference value'); | |
1547 | is($m%100, $num_val%100, 'numifies to usual reference value'); | |
1548 | is($m**1, $num_val, 'numifies to usual reference value'); | |
1549 | ||
1550 | is(abs($aref), $num_val, 'abs() of ref'); | |
1551 | is(-$aref, -$num_val, 'negative of ref'); | |
1552 | is(0+$aref, $num_val, 'ref addition'); | |
1553 | is($aref+0, $num_val, 'ref addition'); | |
1554 | is($aref+$aref, 2*$num_val, 'ref addition'); | |
1555 | is(0-$aref, -$num_val, 'subtraction of ref'); | |
1556 | is(1*$aref, $num_val, 'multiplicaton of ref'); | |
1557 | is($aref/1, $num_val, 'division of ref'); | |
1558 | is($aref%100, $num_val%100, 'modulo of ref'); | |
1559 | is($aref**1, $num_val, 'exponentiation of ref'); | |
c781a409 | 1560 | } |
800401ee | 1561 | |
49c95d58 RD |
1562 | { |
1563 | package CopyConstructorFallback; | |
1564 | use overload | |
1565 | '++' => sub { "$_[0]"; $_[0] }, | |
1566 | fallback => 1; | |
1567 | sub new { bless {} => shift } | |
1568 | ||
1569 | package main; | |
1570 | ||
1571 | my $o = CopyConstructorFallback->new; | |
1572 | my $x = $o++; # would segfault | |
1573 | my $y = ++$o; | |
1574 | is($x, $o, "copy constructor falls back to assignment (postinc)"); | |
1575 | is($y, $o, "copy constructor falls back to assignment (preinc)"); | |
1576 | } | |
1577 | ||
800401ee | 1578 | # EOF |