Commit | Line | Data |
---|---|---|
8ebc5c01 | 1 | #!./perl |
2 | ||
3 | BEGIN { | |
4 | chdir 't' if -d 't'; | |
20822f61 | 5 | @INC = '../lib'; |
8ebc5c01 | 6 | } |
7 | ||
8ebc5c01 | 8 | package Oscalar; |
9 | use overload ( | |
10 | # Anonymous subroutines: | |
11 | '+' => sub {new Oscalar $ {$_[0]}+$_[1]}, | |
12 | '-' => sub {new Oscalar | |
13 | $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]}, | |
14 | '<=>' => sub {new Oscalar | |
15 | $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]}, | |
16 | 'cmp' => sub {new Oscalar | |
17 | $_[2]? ($_[1] cmp ${$_[0]}) : (${$_[0]} cmp $_[1])}, | |
18 | '*' => sub {new Oscalar ${$_[0]}*$_[1]}, | |
19 | '/' => sub {new Oscalar | |
20 | $_[2]? $_[1]/${$_[0]} : | |
21 | ${$_[0]}/$_[1]}, | |
22 | '%' => sub {new Oscalar | |
23 | $_[2]? $_[1]%${$_[0]} : ${$_[0]}%$_[1]}, | |
24 | '**' => sub {new Oscalar | |
25 | $_[2]? $_[1]**${$_[0]} : ${$_[0]}-$_[1]}, | |
26 | ||
27 | qw( | |
28 | "" stringify | |
29 | 0+ numify) # Order of arguments unsignificant | |
30 | ); | |
31 | ||
32 | sub new { | |
33 | my $foo = $_[1]; | |
34 | bless \$foo, $_[0]; | |
35 | } | |
36 | ||
37 | sub stringify { "${$_[0]}" } | |
38 | sub numify { 0 + "${$_[0]}" } # Not needed, additional overhead | |
39 | # comparing to direct compilation based on | |
40 | # stringify | |
41 | ||
42 | package main; | |
43 | ||
446eaa42 | 44 | our $test = 0; |
8ebc5c01 | 45 | $| = 1; |
46 | print "1..",&last,"\n"; | |
47 | ||
48 | sub test { | |
b3ac6de7 IZ |
49 | $test++; |
50 | if (@_ > 1) { | |
51 | if ($_[0] eq $_[1]) { | |
52 | print "ok $test\n"; | |
53 | } else { | |
54 | print "not ok $test: '$_[0]' ne '$_[1]'\n"; | |
55 | } | |
56 | } else { | |
57 | if (shift) { | |
58 | print "ok $test\n"; | |
59 | } else { | |
60 | print "not ok $test\n"; | |
61 | } | |
62 | } | |
8ebc5c01 | 63 | } |
64 | ||
65 | $a = new Oscalar "087"; | |
66 | $b= "$a"; | |
67 | ||
68 | # All test numbers in comments are off by 1. | |
69 | # So much for hard-wiring them in :-) To fix this: | |
70 | test(1); # 1 | |
71 | ||
72 | test ($b eq $a); # 2 | |
73 | test ($b eq "087"); # 3 | |
74 | test (ref $a eq "Oscalar"); # 4 | |
75 | test ($a eq $a); # 5 | |
76 | test ($a eq "087"); # 6 | |
77 | ||
78 | $c = $a + 7; | |
79 | ||
80 | test (ref $c eq "Oscalar"); # 7 | |
81 | test (!($c eq $a)); # 8 | |
82 | test ($c eq "94"); # 9 | |
83 | ||
84 | $b=$a; | |
85 | ||
86 | test (ref $a eq "Oscalar"); # 10 | |
87 | ||
88 | $b++; | |
89 | ||
90 | test (ref $b eq "Oscalar"); # 11 | |
91 | test ( $a eq "087"); # 12 | |
92 | test ( $b eq "88"); # 13 | |
93 | test (ref $a eq "Oscalar"); # 14 | |
94 | ||
95 | $c=$b; | |
96 | $c-=$a; | |
97 | ||
98 | test (ref $c eq "Oscalar"); # 15 | |
99 | test ( $a eq "087"); # 16 | |
100 | test ( $c eq "1"); # 17 | |
101 | test (ref $a eq "Oscalar"); # 18 | |
102 | ||
103 | $b=1; | |
104 | $b+=$a; | |
105 | ||
106 | test (ref $b eq "Oscalar"); # 19 | |
107 | test ( $a eq "087"); # 20 | |
108 | test ( $b eq "88"); # 21 | |
109 | test (ref $a eq "Oscalar"); # 22 | |
110 | ||
111 | eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ]; | |
112 | ||
113 | $b=$a; | |
114 | ||
115 | test (ref $a eq "Oscalar"); # 23 | |
116 | ||
117 | $b++; | |
118 | ||
119 | test (ref $b eq "Oscalar"); # 24 | |
120 | test ( $a eq "087"); # 25 | |
121 | test ( $b eq "88"); # 26 | |
122 | test (ref $a eq "Oscalar"); # 27 | |
123 | ||
124 | package Oscalar; | |
125 | $dummy=bless \$dummy; # Now cache of method should be reloaded | |
126 | package main; | |
127 | ||
128 | $b=$a; | |
129 | $b++; | |
130 | ||
131 | test (ref $b eq "Oscalar"); # 28 | |
132 | test ( $a eq "087"); # 29 | |
133 | test ( $b eq "88"); # 30 | |
134 | test (ref $a eq "Oscalar"); # 31 | |
135 | ||
32251b26 | 136 | undef $b; # Destroying updates tables too... |
8ebc5c01 | 137 | |
138 | eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ]; | |
139 | ||
140 | $b=$a; | |
141 | ||
142 | test (ref $a eq "Oscalar"); # 32 | |
143 | ||
144 | $b++; | |
145 | ||
146 | test (ref $b eq "Oscalar"); # 33 | |
147 | test ( $a eq "087"); # 34 | |
148 | test ( $b eq "88"); # 35 | |
149 | test (ref $a eq "Oscalar"); # 36 | |
150 | ||
151 | package Oscalar; | |
152 | $dummy=bless \$dummy; # Now cache of method should be reloaded | |
153 | package main; | |
154 | ||
155 | $b++; | |
156 | ||
157 | test (ref $b eq "Oscalar"); # 37 | |
158 | test ( $a eq "087"); # 38 | |
159 | test ( $b eq "90"); # 39 | |
160 | test (ref $a eq "Oscalar"); # 40 | |
161 | ||
162 | $b=$a; | |
163 | $b++; | |
164 | ||
165 | test (ref $b eq "Oscalar"); # 41 | |
166 | test ( $a eq "087"); # 42 | |
167 | test ( $b eq "89"); # 43 | |
168 | test (ref $a eq "Oscalar"); # 44 | |
169 | ||
170 | ||
171 | test ($b? 1:0); # 45 | |
172 | ||
173 | eval q[ package Oscalar; use overload ('=' => sub {$main::copies++; | |
174 | package Oscalar; | |
175 | local $new=$ {$_[0]}; | |
176 | bless \$new } ) ]; | |
177 | ||
178 | $b=new Oscalar "$a"; | |
179 | ||
180 | test (ref $b eq "Oscalar"); # 46 | |
181 | test ( $a eq "087"); # 47 | |
182 | test ( $b eq "087"); # 48 | |
183 | test (ref $a eq "Oscalar"); # 49 | |
184 | ||
185 | $b++; | |
186 | ||
187 | test (ref $b eq "Oscalar"); # 50 | |
188 | test ( $a eq "087"); # 51 | |
189 | test ( $b eq "89"); # 52 | |
190 | test (ref $a eq "Oscalar"); # 53 | |
191 | test ($copies == 0); # 54 | |
192 | ||
193 | $b+=1; | |
194 | ||
195 | test (ref $b eq "Oscalar"); # 55 | |
196 | test ( $a eq "087"); # 56 | |
197 | test ( $b eq "90"); # 57 | |
198 | test (ref $a eq "Oscalar"); # 58 | |
199 | test ($copies == 0); # 59 | |
200 | ||
201 | $b=$a; | |
202 | $b+=1; | |
203 | ||
204 | test (ref $b eq "Oscalar"); # 60 | |
205 | test ( $a eq "087"); # 61 | |
206 | test ( $b eq "88"); # 62 | |
207 | test (ref $a eq "Oscalar"); # 63 | |
208 | test ($copies == 0); # 64 | |
209 | ||
210 | $b=$a; | |
211 | $b++; | |
212 | ||
213 | test (ref $b eq "Oscalar") || print ref $b,"=ref(b)\n"; # 65 | |
214 | test ( $a eq "087"); # 66 | |
215 | test ( $b eq "89"); # 67 | |
216 | test (ref $a eq "Oscalar"); # 68 | |
217 | test ($copies == 1); # 69 | |
218 | ||
219 | eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1]; | |
220 | $_[0] } ) ]; | |
221 | $c=new Oscalar; # Cause rehash | |
222 | ||
223 | $b=$a; | |
224 | $b+=1; | |
225 | ||
226 | test (ref $b eq "Oscalar"); # 70 | |
227 | test ( $a eq "087"); # 71 | |
228 | test ( $b eq "90"); # 72 | |
229 | test (ref $a eq "Oscalar"); # 73 | |
230 | test ($copies == 2); # 74 | |
231 | ||
232 | $b+=$b; | |
233 | ||
234 | test (ref $b eq "Oscalar"); # 75 | |
235 | test ( $b eq "360"); # 76 | |
236 | test ($copies == 2); # 77 | |
237 | $b=-$b; | |
238 | ||
239 | test (ref $b eq "Oscalar"); # 78 | |
240 | test ( $b eq "-360"); # 79 | |
241 | test ($copies == 2); # 80 | |
242 | ||
243 | $b=abs($b); | |
244 | ||
245 | test (ref $b eq "Oscalar"); # 81 | |
246 | test ( $b eq "360"); # 82 | |
247 | test ($copies == 2); # 83 | |
248 | ||
249 | $b=abs($b); | |
250 | ||
251 | test (ref $b eq "Oscalar"); # 84 | |
252 | test ( $b eq "360"); # 85 | |
253 | test ($copies == 2); # 86 | |
254 | ||
255 | eval q[package Oscalar; | |
256 | use overload ('x' => sub {new Oscalar ( $_[2] ? "_.$_[1]._" x $ {$_[0]} | |
257 | : "_.${$_[0]}._" x $_[1])}) ]; | |
258 | ||
259 | $a=new Oscalar "yy"; | |
260 | $a x= 3; | |
261 | test ($a eq "_.yy.__.yy.__.yy._"); # 87 | |
262 | ||
263 | eval q[package Oscalar; | |
264 | use overload ('.' => sub {new Oscalar ( $_[2] ? | |
265 | "_.$_[1].__.$ {$_[0]}._" | |
266 | : "_.$ {$_[0]}.__.$_[1]._")}) ]; | |
267 | ||
268 | $a=new Oscalar "xx"; | |
269 | ||
270 | test ("b${a}c" eq "_._.b.__.xx._.__.c._"); # 88 | |
271 | ||
272 | # Check inheritance of overloading; | |
273 | { | |
274 | package OscalarI; | |
275 | @ISA = 'Oscalar'; | |
276 | } | |
277 | ||
278 | $aI = new OscalarI "$a"; | |
279 | test (ref $aI eq "OscalarI"); # 89 | |
280 | test ("$aI" eq "xx"); # 90 | |
281 | test ($aI eq "xx"); # 91 | |
282 | test ("b${aI}c" eq "_._.b.__.xx._.__.c._"); # 92 | |
283 | ||
284 | # Here we test blessing to a package updates hash | |
285 | ||
286 | eval "package Oscalar; no overload '.'"; | |
287 | ||
288 | test ("b${a}" eq "_.b.__.xx._"); # 93 | |
289 | $x="1"; | |
290 | bless \$x, Oscalar; | |
291 | test ("b${a}c" eq "bxxc"); # 94 | |
292 | new Oscalar 1; | |
293 | test ("b${a}c" eq "bxxc"); # 95 | |
294 | ||
295 | # Negative overloading: | |
296 | ||
297 | $na = eval { ~$a }; | |
298 | test($@ =~ /no method found/); # 96 | |
299 | ||
300 | # Check AUTOLOADING: | |
301 | ||
302 | *Oscalar::AUTOLOAD = | |
303 | sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ; | |
304 | goto &{"Oscalar::$AUTOLOAD"}}; | |
305 | ||
44a8e56a | 306 | eval "package Oscalar; sub comple; use overload '~' => 'comple'"; |
8ebc5c01 | 307 | |
308 | $na = eval { ~$a }; # Hash was not updated | |
309 | test($@ =~ /no method found/); # 97 | |
310 | ||
311 | bless \$x, Oscalar; | |
312 | ||
313 | $na = eval { ~$a }; # Hash updated | |
44a8e56a | 314 | warn "`$na', $@" if $@; |
8ebc5c01 | 315 | test !$@; # 98 |
316 | test($na eq '_!_xx_!_'); # 99 | |
317 | ||
318 | $na = 0; | |
319 | ||
320 | $na = eval { ~$aI }; # Hash was not updated | |
321 | test($@ =~ /no method found/); # 100 | |
322 | ||
323 | bless \$x, OscalarI; | |
324 | ||
325 | $na = eval { ~$aI }; | |
326 | print $@; | |
327 | ||
328 | test !$@; # 101 | |
329 | test($na eq '_!_xx_!_'); # 102 | |
330 | ||
44a8e56a | 331 | eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'"; |
8ebc5c01 | 332 | |
333 | $na = eval { $aI >> 1 }; # Hash was not updated | |
334 | test($@ =~ /no method found/); # 103 | |
335 | ||
336 | bless \$x, OscalarI; | |
337 | ||
338 | $na = 0; | |
339 | ||
340 | $na = eval { $aI >> 1 }; | |
341 | print $@; | |
342 | ||
343 | test !$@; # 104 | |
344 | test($na eq '_!_xx_!_'); # 105 | |
345 | ||
44a8e56a | 346 | # warn overload::Method($a, '0+'), "\n"; |
8ebc5c01 | 347 | test (overload::Method($a, '0+') eq \&Oscalar::numify); # 106 |
348 | test (overload::Method($aI,'0+') eq \&Oscalar::numify); # 107 | |
349 | test (overload::Overloaded($aI)); # 108 | |
350 | test (!overload::Overloaded('overload')); # 109 | |
351 | ||
352 | test (! defined overload::Method($aI, '<<')); # 110 | |
353 | test (! defined overload::Method($a, '<')); # 111 | |
354 | ||
355 | test (overload::StrVal($aI) =~ /^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); # 112 | |
356 | test (overload::StrVal(\$aI) eq "@{[\$aI]}"); # 113 | |
357 | ||
44a8e56a | 358 | # Check overloading by methods (specified deep in the ISA tree). |
359 | { | |
360 | package OscalarII; | |
361 | @ISA = 'OscalarI'; | |
362 | sub Oscalar::lshft {"_<<_" . shift() . "_<<_"} | |
363 | eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'"; | |
364 | } | |
365 | ||
366 | $aaII = "087"; | |
367 | $aII = \$aaII; | |
368 | bless $aII, 'OscalarII'; | |
369 | bless \$fake, 'OscalarI'; # update the hash | |
370 | test(($aI | 3) eq '_<<_xx_<<_'); # 114 | |
371 | # warn $aII << 3; | |
372 | test(($aII << 3) eq '_<<_087_<<_'); # 115 | |
373 | ||
b3ac6de7 IZ |
374 | { |
375 | BEGIN { $int = 7; overload::constant 'integer' => sub {$int++; shift}; } | |
376 | $out = 2**10; | |
377 | } | |
378 | test($int, 9); # 116 | |
379 | test($out, 1024); # 117 | |
380 | ||
381 | $foo = 'foo'; | |
382 | $foo1 = 'f\'o\\o'; | |
383 | { | |
384 | BEGIN { $q = $qr = 7; | |
385 | overload::constant 'q' => sub {$q++; push @q, shift, ($_[1] || 'none'); shift}, | |
386 | 'qr' => sub {$qr++; push @qr, shift, ($_[1] || 'none'); shift}; } | |
387 | $out = 'foo'; | |
388 | $out1 = 'f\'o\\o'; | |
389 | $out2 = "a\a$foo,\,"; | |
390 | /b\b$foo.\./; | |
391 | } | |
392 | ||
393 | test($out, 'foo'); # 118 | |
394 | test($out, $foo); # 119 | |
395 | test($out1, 'f\'o\\o'); # 120 | |
396 | test($out1, $foo1); # 121 | |
397 | test($out2, "a\afoo,\,"); # 122 | |
398 | test("@q", "foo q f'o\\\\o q a\\a qq ,\\, qq"); # 123 | |
399 | test($q, 11); # 124 | |
400 | test("@qr", "b\\b qq .\\. qq"); # 125 | |
401 | test($qr, 9); # 126 | |
402 | ||
403 | { | |
404 | $_ = '!<b>!foo!<-.>!'; | |
405 | BEGIN { overload::constant 'q' => sub {push @q1, shift, ($_[1] || 'none'); "_<" . (shift) . ">_"}, | |
406 | 'qr' => sub {push @qr1, shift, ($_[1] || 'none'); "!<" . (shift) . ">!"}; } | |
407 | $out = 'foo'; | |
408 | $out1 = 'f\'o\\o'; | |
409 | $out2 = "a\a$foo,\,"; | |
410 | $res = /b\b$foo.\./; | |
411 | $a = <<EOF; | |
412 | oups | |
413 | EOF | |
414 | $b = <<'EOF'; | |
415 | oups1 | |
416 | EOF | |
417 | $c = bareword; | |
418 | m'try it'; | |
419 | s'first part'second part'; | |
420 | s/yet another/tail here/; | |
c2e66d9e | 421 | tr/A-Z/a-z/; |
b3ac6de7 IZ |
422 | } |
423 | ||
424 | test($out, '_<foo>_'); # 117 | |
425 | test($out1, '_<f\'o\\o>_'); # 128 | |
426 | test($out2, "_<a\a>_foo_<,\,>_"); # 129 | |
427 | test("@q1", "foo q f'o\\\\o q a\\a qq ,\\, qq oups | |
428 | qq oups1 | |
c2e66d9e | 429 | q second part q tail here s A-Z tr a-z tr"); # 130 |
b3ac6de7 IZ |
430 | test("@qr1", "b\\b qq .\\. qq try it q first part q yet another qq"); # 131 |
431 | test($res, 1); # 132 | |
432 | test($a, "_<oups | |
433 | >_"); # 133 | |
434 | test($b, "_<oups1 | |
435 | >_"); # 134 | |
436 | test($c, "bareword"); # 135 | |
437 | ||
ee239bfe IZ |
438 | { |
439 | package symbolic; # Primitive symbolic calculator | |
440 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, | |
441 | '=' => \&cpy, '++' => \&inc, '--' => \&dec; | |
442 | ||
443 | sub new { shift; bless ['n', @_] } | |
444 | sub cpy { | |
445 | my $self = shift; | |
446 | bless [@$self], ref $self; | |
447 | } | |
448 | sub inc { $_[0] = bless ['++', $_[0], 1]; } | |
449 | sub dec { $_[0] = bless ['--', $_[0], 1]; } | |
450 | sub wrap { | |
451 | my ($obj, $other, $inv, $meth) = @_; | |
452 | if ($meth eq '++' or $meth eq '--') { | |
453 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference | |
454 | return $obj; | |
455 | } | |
456 | ($obj, $other) = ($other, $obj) if $inv; | |
457 | bless [$meth, $obj, $other]; | |
458 | } | |
459 | sub str { | |
460 | my ($meth, $a, $b) = @{+shift}; | |
461 | $a = 'u' unless defined $a; | |
462 | if (defined $b) { | |
463 | "[$meth $a $b]"; | |
464 | } else { | |
465 | "[$meth $a]"; | |
466 | } | |
467 | } | |
468 | my %subr = ( 'n' => sub {$_[0]} ); | |
469 | foreach my $op (split " ", $overload::ops{with_assign}) { | |
470 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; | |
471 | } | |
472 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); | |
473 | foreach my $op (split " ", "@overload::ops{ @bins }") { | |
474 | $subr{$op} = eval "sub {shift() $op shift()}"; | |
475 | } | |
476 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { | |
477 | $subr{$op} = eval "sub {$op shift()}"; | |
478 | } | |
479 | $subr{'++'} = $subr{'+'}; | |
480 | $subr{'--'} = $subr{'-'}; | |
481 | ||
482 | sub num { | |
483 | my ($meth, $a, $b) = @{+shift}; | |
484 | my $subr = $subr{$meth} | |
485 | or die "Do not know how to ($meth) in symbolic"; | |
486 | $a = $a->num if ref $a eq __PACKAGE__; | |
487 | $b = $b->num if ref $b eq __PACKAGE__; | |
488 | $subr->($a,$b); | |
489 | } | |
490 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } | |
491 | sub FETCH { shift } | |
492 | sub nop { } # Around a bug | |
493 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; } | |
494 | sub STORE { | |
495 | my $obj = shift; | |
496 | $#$obj = 1; | |
a1063b2d | 497 | $obj->[1] = shift; |
ee239bfe IZ |
498 | } |
499 | } | |
500 | ||
501 | { | |
502 | my $foo = new symbolic 11; | |
503 | my $baz = $foo++; | |
504 | test( (sprintf "%d", $foo), '12'); | |
505 | test( (sprintf "%d", $baz), '11'); | |
506 | my $bar = $foo; | |
507 | $baz = ++$foo; | |
508 | test( (sprintf "%d", $foo), '13'); | |
509 | test( (sprintf "%d", $bar), '12'); | |
510 | test( (sprintf "%d", $baz), '13'); | |
511 | my $ban = $foo; | |
512 | $baz = ($foo += 1); | |
513 | test( (sprintf "%d", $foo), '14'); | |
514 | test( (sprintf "%d", $bar), '12'); | |
515 | test( (sprintf "%d", $baz), '14'); | |
516 | test( (sprintf "%d", $ban), '13'); | |
517 | $baz = 0; | |
518 | $baz = $foo++; | |
519 | test( (sprintf "%d", $foo), '15'); | |
520 | test( (sprintf "%d", $baz), '14'); | |
521 | test( "$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]'); | |
522 | } | |
523 | ||
524 | { | |
525 | my $iter = new symbolic 2; | |
526 | my $side = new symbolic 1; | |
527 | my $cnt = $iter; | |
528 | ||
529 | while ($cnt) { | |
530 | $cnt = $cnt - 1; # The "simple" way | |
531 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
532 | } | |
533 | my $pi = $side*(2**($iter+2)); | |
534 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'; | |
535 | test( (sprintf "%f", $pi), '3.182598'); | |
536 | } | |
537 | ||
538 | { | |
539 | my $iter = new symbolic 2; | |
540 | my $side = new symbolic 1; | |
541 | my $cnt = $iter; | |
542 | ||
543 | while ($cnt--) { | |
544 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
545 | } | |
546 | my $pi = $side*(2**($iter+2)); | |
547 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'; | |
548 | test( (sprintf "%f", $pi), '3.182598'); | |
549 | } | |
550 | ||
551 | { | |
552 | my ($a, $b); | |
553 | symbolic->vars($a, $b); | |
554 | my $c = sqrt($a**2 + $b**2); | |
555 | $a = 3; $b = 4; | |
556 | test( (sprintf "%d", $c), '5'); | |
557 | $a = 12; $b = 5; | |
558 | test( (sprintf "%d", $c), '13'); | |
559 | } | |
560 | ||
561 | { | |
562 | package symbolic1; # Primitive symbolic calculator | |
563 | # Mutator inc/dec | |
564 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, '=' => \&cpy; | |
565 | ||
566 | sub new { shift; bless ['n', @_] } | |
567 | sub cpy { | |
568 | my $self = shift; | |
569 | bless [@$self], ref $self; | |
570 | } | |
571 | sub wrap { | |
572 | my ($obj, $other, $inv, $meth) = @_; | |
573 | if ($meth eq '++' or $meth eq '--') { | |
574 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference | |
575 | return $obj; | |
576 | } | |
577 | ($obj, $other) = ($other, $obj) if $inv; | |
578 | bless [$meth, $obj, $other]; | |
579 | } | |
580 | sub str { | |
581 | my ($meth, $a, $b) = @{+shift}; | |
582 | $a = 'u' unless defined $a; | |
583 | if (defined $b) { | |
584 | "[$meth $a $b]"; | |
585 | } else { | |
586 | "[$meth $a]"; | |
587 | } | |
588 | } | |
589 | my %subr = ( 'n' => sub {$_[0]} ); | |
590 | foreach my $op (split " ", $overload::ops{with_assign}) { | |
591 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; | |
592 | } | |
593 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); | |
594 | foreach my $op (split " ", "@overload::ops{ @bins }") { | |
595 | $subr{$op} = eval "sub {shift() $op shift()}"; | |
596 | } | |
597 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { | |
598 | $subr{$op} = eval "sub {$op shift()}"; | |
599 | } | |
600 | $subr{'++'} = $subr{'+'}; | |
601 | $subr{'--'} = $subr{'-'}; | |
602 | ||
603 | sub num { | |
604 | my ($meth, $a, $b) = @{+shift}; | |
605 | my $subr = $subr{$meth} | |
606 | or die "Do not know how to ($meth) in symbolic"; | |
607 | $a = $a->num if ref $a eq __PACKAGE__; | |
608 | $b = $b->num if ref $b eq __PACKAGE__; | |
609 | $subr->($a,$b); | |
610 | } | |
611 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } | |
612 | sub FETCH { shift } | |
613 | sub nop { } # Around a bug | |
614 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; } | |
615 | sub STORE { | |
616 | my $obj = shift; | |
617 | $#$obj = 1; | |
a1063b2d | 618 | $obj->[1] = shift; |
ee239bfe IZ |
619 | } |
620 | } | |
621 | ||
622 | { | |
623 | my $foo = new symbolic1 11; | |
624 | my $baz = $foo++; | |
625 | test( (sprintf "%d", $foo), '12'); | |
626 | test( (sprintf "%d", $baz), '11'); | |
627 | my $bar = $foo; | |
628 | $baz = ++$foo; | |
629 | test( (sprintf "%d", $foo), '13'); | |
630 | test( (sprintf "%d", $bar), '12'); | |
631 | test( (sprintf "%d", $baz), '13'); | |
632 | my $ban = $foo; | |
633 | $baz = ($foo += 1); | |
634 | test( (sprintf "%d", $foo), '14'); | |
635 | test( (sprintf "%d", $bar), '12'); | |
636 | test( (sprintf "%d", $baz), '14'); | |
637 | test( (sprintf "%d", $ban), '13'); | |
638 | $baz = 0; | |
639 | $baz = $foo++; | |
640 | test( (sprintf "%d", $foo), '15'); | |
641 | test( (sprintf "%d", $baz), '14'); | |
642 | test( "$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]'); | |
643 | } | |
644 | ||
645 | { | |
646 | my $iter = new symbolic1 2; | |
647 | my $side = new symbolic1 1; | |
648 | my $cnt = $iter; | |
649 | ||
650 | while ($cnt) { | |
651 | $cnt = $cnt - 1; # The "simple" way | |
652 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
653 | } | |
654 | my $pi = $side*(2**($iter+2)); | |
655 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'; | |
656 | test( (sprintf "%f", $pi), '3.182598'); | |
657 | } | |
658 | ||
659 | { | |
660 | my $iter = new symbolic1 2; | |
661 | my $side = new symbolic1 1; | |
662 | my $cnt = $iter; | |
663 | ||
664 | while ($cnt--) { | |
665 | $side = (sqrt(1 + $side**2) - 1)/$side; | |
666 | } | |
667 | my $pi = $side*(2**($iter+2)); | |
668 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'; | |
669 | test( (sprintf "%f", $pi), '3.182598'); | |
670 | } | |
671 | ||
672 | { | |
673 | my ($a, $b); | |
674 | symbolic1->vars($a, $b); | |
675 | my $c = sqrt($a**2 + $b**2); | |
676 | $a = 3; $b = 4; | |
677 | test( (sprintf "%d", $c), '5'); | |
678 | $a = 12; $b = 5; | |
679 | test( (sprintf "%d", $c), '13'); | |
680 | } | |
681 | ||
682 | { | |
683 | package two_face; # Scalars with separate string and | |
684 | # numeric values. | |
685 | sub new { my $p = shift; bless [@_], $p } | |
686 | use overload '""' => \&str, '0+' => \&num, fallback => 1; | |
687 | sub num {shift->[1]} | |
688 | sub str {shift->[0]} | |
689 | } | |
690 | ||
691 | { | |
692 | my $seven = new two_face ("vii", 7); | |
693 | test( (sprintf "seven=$seven, seven=%d, eight=%d", $seven, $seven+1), | |
694 | 'seven=vii, seven=7, eight=8'); | |
695 | test( scalar ($seven =~ /i/), '1') | |
696 | } | |
b3ac6de7 | 697 | |
d0ecd44c IZ |
698 | { |
699 | package sorting; | |
700 | use overload 'cmp' => \∁ | |
701 | sub new { my ($p, $v) = @_; bless \$v, $p } | |
702 | sub comp { my ($x,$y) = @_; ($$x * 3 % 10) <=> ($$y * 3 % 10) or $$x cmp $$y } | |
703 | } | |
704 | { | |
705 | my @arr = map sorting->new($_), 0..12; | |
706 | my @sorted1 = sort @arr; | |
707 | my @sorted2 = map $$_, @sorted1; | |
708 | test "@sorted2", '0 10 7 4 1 11 8 5 12 2 9 6 3'; | |
709 | } | |
f5284f61 IZ |
710 | { |
711 | package iterator; | |
712 | use overload '<>' => \&iter; | |
713 | sub new { my ($p, $v) = @_; bless \$v, $p } | |
714 | sub iter { my ($x) = @_; return undef if $$x < 0; return $$x--; } | |
715 | } | |
72b16652 GS |
716 | |
717 | # XXX iterator overload not intended to work with CORE::GLOBAL? | |
718 | if (defined &CORE::GLOBAL::glob) { | |
719 | test '1', '1'; # 175 | |
720 | test '1', '1'; # 176 | |
721 | test '1', '1'; # 177 | |
722 | } | |
723 | else { | |
f5284f61 IZ |
724 | my $iter = iterator->new(5); |
725 | my $acc = ''; | |
726 | my $out; | |
727 | $acc .= " $out" while $out = <${iter}>; | |
728 | test $acc, ' 5 4 3 2 1 0'; # 175 | |
729 | $iter = iterator->new(5); | |
730 | test scalar <${iter}>, '5'; # 176 | |
731 | $acc = ''; | |
b04ef359 | 732 | $acc .= " $out" while $out = <$iter>; |
f5284f61 IZ |
733 | test $acc, ' 4 3 2 1 0'; # 177 |
734 | } | |
735 | { | |
736 | package deref; | |
737 | use overload '%{}' => \&hderef, '&{}' => \&cderef, | |
738 | '*{}' => \&gderef, '${}' => \&sderef, '@{}' => \&aderef; | |
739 | sub new { my ($p, $v) = @_; bless \$v, $p } | |
740 | sub deref { | |
741 | my ($self, $key) = (shift, shift); | |
742 | my $class = ref $self; | |
743 | bless $self, 'deref::dummy'; # Disable overloading of %{} | |
744 | my $out = $self->{$key}; | |
745 | bless $self, $class; # Restore overloading | |
746 | $out; | |
747 | } | |
748 | sub hderef {shift->deref('h')} | |
749 | sub aderef {shift->deref('a')} | |
750 | sub cderef {shift->deref('c')} | |
751 | sub gderef {shift->deref('g')} | |
752 | sub sderef {shift->deref('s')} | |
753 | } | |
754 | { | |
755 | my $deref = bless { h => { foo => 5 , fake => 23 }, | |
756 | c => sub {return shift() + 34}, | |
757 | 's' => \123, | |
758 | a => [11..13], | |
759 | g => \*srt, | |
760 | }, 'deref'; | |
761 | # Hash: | |
762 | my @cont = sort %$deref; | |
f70c35af GS |
763 | if ("\t" eq "\011") { # ascii |
764 | test "@cont", '23 5 fake foo'; # 178 | |
765 | } | |
766 | else { # ebcdic alpha-numeric sort order | |
767 | test "@cont", 'fake foo 23 5'; # 178 | |
768 | } | |
f5284f61 IZ |
769 | my @keys = sort keys %$deref; |
770 | test "@keys", 'fake foo'; # 179 | |
771 | my @val = sort values %$deref; | |
772 | test "@val", '23 5'; # 180 | |
773 | test $deref->{foo}, 5; # 181 | |
774 | test defined $deref->{bar}, ''; # 182 | |
775 | my $key; | |
776 | @keys = (); | |
777 | push @keys, $key while $key = each %$deref; | |
778 | @keys = sort @keys; | |
779 | test "@keys", 'fake foo'; # 183 | |
780 | test exists $deref->{bar}, ''; # 184 | |
781 | test exists $deref->{foo}, 1; # 185 | |
782 | # Code: | |
783 | test $deref->(5), 39; # 186 | |
784 | test &$deref(6), 40; # 187 | |
785 | sub xxx_goto { goto &$deref } | |
786 | test xxx_goto(7), 41; # 188 | |
787 | my $srt = bless { c => sub {$b <=> $a} | |
788 | }, 'deref'; | |
789 | *srt = \&$srt; | |
790 | my @sorted = sort srt 11, 2, 5, 1, 22; | |
791 | test "@sorted", '22 11 5 2 1'; # 189 | |
792 | # Scalar | |
793 | test $$deref, 123; # 190 | |
c6e96bcb GS |
794 | # Code |
795 | @sorted = sort $srt 11, 2, 5, 1, 22; | |
f5284f61 IZ |
796 | test "@sorted", '22 11 5 2 1'; # 191 |
797 | # Array | |
798 | test "@$deref", '11 12 13'; # 192 | |
799 | test $#$deref, '2'; # 193 | |
800 | my $l = @$deref; | |
801 | test $l, 3; # 194 | |
802 | test $deref->[2], '13'; # 195 | |
803 | $l = pop @$deref; | |
804 | test $l, 13; # 196 | |
805 | $l = 1; | |
806 | test $deref->[$l], '12'; # 197 | |
807 | # Repeated dereference | |
808 | my $double = bless { h => $deref, | |
809 | }, 'deref'; | |
810 | test $double->{foo}, 5; # 198 | |
811 | } | |
812 | ||
813 | { | |
814 | package two_refs; | |
815 | use overload '%{}' => \&gethash, '@{}' => sub { ${shift()} }; | |
816 | sub new { | |
817 | my $p = shift; | |
818 | bless \ [@_], $p; | |
819 | } | |
820 | sub gethash { | |
821 | my %h; | |
822 | my $self = shift; | |
823 | tie %h, ref $self, $self; | |
824 | \%h; | |
825 | } | |
826 | ||
827 | sub TIEHASH { my $p = shift; bless \ shift, $p } | |
828 | my %fields; | |
829 | my $i = 0; | |
830 | $fields{$_} = $i++ foreach qw{zero one two three}; | |
831 | sub STORE { | |
832 | my $self = ${shift()}; | |
833 | my $key = $fields{shift()}; | |
834 | defined $key or die "Out of band access"; | |
835 | $$self->[$key] = shift; | |
836 | } | |
837 | sub FETCH { | |
838 | my $self = ${shift()}; | |
839 | my $key = $fields{shift()}; | |
840 | defined $key or die "Out of band access"; | |
841 | $$self->[$key]; | |
842 | } | |
843 | } | |
844 | ||
845 | my $bar = new two_refs 3,4,5,6; | |
846 | $bar->[2] = 11; | |
847 | test $bar->{two}, 11; # 199 | |
848 | $bar->{three} = 13; | |
849 | test $bar->[3], 13; # 200 | |
850 | ||
851 | { | |
852 | package two_refs_o; | |
853 | @ISA = ('two_refs'); | |
854 | } | |
855 | ||
856 | $bar = new two_refs_o 3,4,5,6; | |
857 | $bar->[2] = 11; | |
858 | test $bar->{two}, 11; # 201 | |
859 | $bar->{three} = 13; | |
860 | test $bar->[3], 13; # 202 | |
861 | ||
862 | { | |
863 | package two_refs1; | |
864 | use overload '%{}' => sub { ${shift()}->[1] }, | |
865 | '@{}' => sub { ${shift()}->[0] }; | |
866 | sub new { | |
867 | my $p = shift; | |
868 | my $a = [@_]; | |
869 | my %h; | |
870 | tie %h, $p, $a; | |
871 | bless \ [$a, \%h], $p; | |
872 | } | |
873 | sub gethash { | |
874 | my %h; | |
875 | my $self = shift; | |
876 | tie %h, ref $self, $self; | |
877 | \%h; | |
878 | } | |
879 | ||
880 | sub TIEHASH { my $p = shift; bless \ shift, $p } | |
881 | my %fields; | |
882 | my $i = 0; | |
883 | $fields{$_} = $i++ foreach qw{zero one two three}; | |
884 | sub STORE { | |
885 | my $a = ${shift()}; | |
886 | my $key = $fields{shift()}; | |
887 | defined $key or die "Out of band access"; | |
888 | $a->[$key] = shift; | |
889 | } | |
890 | sub FETCH { | |
891 | my $a = ${shift()}; | |
892 | my $key = $fields{shift()}; | |
893 | defined $key or die "Out of band access"; | |
894 | $a->[$key]; | |
895 | } | |
896 | } | |
897 | ||
898 | $bar = new two_refs_o 3,4,5,6; | |
899 | $bar->[2] = 11; | |
900 | test $bar->{two}, 11; # 203 | |
901 | $bar->{three} = 13; | |
902 | test $bar->[3], 13; # 204 | |
903 | ||
904 | { | |
905 | package two_refs1_o; | |
906 | @ISA = ('two_refs1'); | |
907 | } | |
908 | ||
909 | $bar = new two_refs1_o 3,4,5,6; | |
910 | $bar->[2] = 11; | |
911 | test $bar->{two}, 11; # 205 | |
912 | $bar->{three} = 13; | |
913 | test $bar->[3], 13; # 206 | |
914 | ||
fe7ac86a IZ |
915 | { |
916 | package B; | |
917 | use overload bool => sub { ${+shift} }; | |
918 | } | |
919 | ||
920 | my $aaa; | |
921 | { my $bbbb = 0; $aaa = bless \$bbbb, B } | |
922 | ||
1426bbf4 | 923 | test !$aaa, 1; # 207 |
fe7ac86a IZ |
924 | |
925 | unless ($aaa) { | |
1426bbf4 | 926 | test 'ok', 'ok'; # 208 |
fe7ac86a | 927 | } else { |
1426bbf4 | 928 | test 'is not', 'ok'; # 208 |
fe7ac86a IZ |
929 | } |
930 | ||
1426bbf4 MG |
931 | # check that overload isn't done twice by join |
932 | { my $c = 0; | |
933 | package Join; | |
934 | use overload '""' => sub { $c++ }; | |
935 | my $x = join '', bless([]), 'pq', bless([]); | |
936 | main::test $x, '0pq1'; # 209 | |
937 | }; | |
fe7ac86a | 938 | |
4498a751 PM |
939 | # Test module-specific warning |
940 | { | |
941 | # check the Odd number of arguments for overload::constant warning | |
942 | my $a = "" ; | |
0a911d86 | 943 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
4498a751 PM |
944 | $x = eval ' overload::constant "integer" ; ' ; |
945 | test($a eq "") ; # 210 | |
946 | use warnings 'overload' ; | |
947 | $x = eval ' overload::constant "integer" ; ' ; | |
948 | test($a =~ /^Odd number of arguments for overload::constant at/) ; # 211 | |
949 | } | |
950 | ||
951 | { | |
952 | # check the `$_[0]' is not an overloadable type warning | |
953 | my $a = "" ; | |
0a911d86 | 954 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
4498a751 PM |
955 | $x = eval ' overload::constant "fred" => sub {} ; ' ; |
956 | test($a eq "") ; # 212 | |
957 | use warnings 'overload' ; | |
958 | $x = eval ' overload::constant "fred" => sub {} ; ' ; | |
959 | test($a =~ /^`fred' is not an overloadable type at/); # 213 | |
960 | } | |
961 | ||
962 | { | |
963 | # check the `$_[1]' is not a code reference warning | |
964 | my $a = "" ; | |
0a911d86 | 965 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
4498a751 PM |
966 | $x = eval ' overload::constant "integer" => 1; ' ; |
967 | test($a eq "") ; # 214 | |
968 | use warnings 'overload' ; | |
969 | $x = eval ' overload::constant "integer" => 1; ' ; | |
970 | test($a =~ /^`1' is not a code reference at/); # 215 | |
971 | } | |
972 | ||
78f67eb5 JH |
973 | { |
974 | my $c = 0; | |
975 | package ov_int1; | |
976 | use overload '""' => sub { 3+shift->[0] }, | |
977 | '0+' => sub { 10+shift->[0] }, | |
978 | 'int' => sub { 100+shift->[0] }; | |
979 | sub new {my $p = shift; bless [shift], $p} | |
980 | ||
981 | package ov_int2; | |
982 | use overload '""' => sub { 5+shift->[0] }, | |
983 | '0+' => sub { 30+shift->[0] }, | |
984 | 'int' => sub { 'ov_int1'->new(1000+shift->[0]) }; | |
985 | sub new {my $p = shift; bless [shift], $p} | |
986 | ||
987 | package noov_int; | |
988 | use overload '""' => sub { 2+shift->[0] }, | |
989 | '0+' => sub { 9+shift->[0] }; | |
990 | sub new {my $p = shift; bless [shift], $p} | |
991 | ||
992 | package main; | |
993 | ||
994 | my $x = new noov_int 11; | |
995 | my $int_x = int $x; | |
996 | main::test("$int_x" eq 20); # 216 | |
997 | $x = new ov_int1 31; | |
998 | $int_x = int $x; | |
999 | main::test("$int_x" eq 131); # 217 | |
1000 | $x = new ov_int2 51; | |
1001 | $int_x = int $x; | |
1002 | main::test("$int_x" eq 1054); # 218 | |
1003 | } | |
1004 | ||
1554e226 DC |
1005 | # make sure that we don't inifinitely recurse |
1006 | { | |
1007 | my $c = 0; | |
1008 | package Recurse; | |
1009 | use overload '""' => sub { shift }, | |
1010 | '0+' => sub { shift }, | |
1011 | 'bool' => sub { shift }, | |
1012 | fallback => 1; | |
1013 | my $x = bless([]); | |
78f67eb5 JH |
1014 | main::test("$x" =~ /Recurse=ARRAY/); # 219 |
1015 | main::test($x); # 220 | |
1016 | main::test($x+0 =~ /Recurse=ARRAY/); # 221 | |
1017 | } | |
1018 | ||
1dc13c17 SC |
1019 | # BugID 20010422.003 |
1020 | package Foo; | |
1021 | ||
1022 | use overload | |
1023 | 'bool' => sub { return !$_[0]->is_zero() || undef; } | |
1024 | ; | |
1025 | ||
1026 | sub is_zero | |
1027 | { | |
1028 | my $self = shift; | |
1029 | return $self->{var} == 0; | |
1030 | } | |
1031 | ||
1032 | sub new | |
1033 | { | |
1034 | my $class = shift; | |
1035 | my $self = {}; | |
1036 | $self->{var} = shift; | |
1037 | bless $self,$class; | |
1038 | } | |
1039 | ||
1040 | package main; | |
1041 | ||
1042 | use strict; | |
1043 | ||
1044 | my $r = Foo->new(8); | |
1045 | $r = Foo->new(0); | |
78f67eb5 | 1046 | |
e89a8b87 | 1047 | test(($r || 0) == 0); # 222 |
1554e226 | 1048 | |
6050d10e JP |
1049 | package utf8_o; |
1050 | ||
1051 | use overload | |
1052 | '""' => sub { return $_[0]->{var}; } | |
1053 | ; | |
1054 | ||
1055 | sub new | |
1056 | { | |
1057 | my $class = shift; | |
1058 | my $self = {}; | |
1059 | $self->{var} = shift; | |
1060 | bless $self,$class; | |
1061 | } | |
1062 | ||
1063 | package main; | |
1064 | ||
1065 | ||
1066 | my $utfvar = new utf8_o 200.2.1; | |
446eaa42 YST |
1067 | test("$utfvar" eq 200.2.1); # 223 - stringify |
1068 | test("a$utfvar" eq "a".200.2.1); # 224 - overload via sv_2pv_flags | |
6050d10e | 1069 | |
446eaa42 | 1070 | # 225..227 -- more %{} tests. Hangs in 5.6.0, okay in later releases. |
41cb1005 JH |
1071 | # Basically this example implements strong encapsulation: if Hderef::import() |
1072 | # were to eval the overload code in the caller's namespace, the privatisation | |
1073 | # would be quite transparent. | |
1074 | package Hderef; | |
1075 | use overload '%{}' => sub { (caller(0))[0] eq 'Foo' ? $_[0] : die "zap" }; | |
1076 | package Foo; | |
1077 | @Foo::ISA = 'Hderef'; | |
1078 | sub new { bless {}, shift } | |
1079 | sub xet { @_ == 2 ? $_[0]->{$_[1]} : | |
1080 | @_ == 3 ? ($_[0]->{$_[1]} = $_[2]) : undef } | |
1081 | package main; | |
1082 | my $a = Foo->new; | |
1083 | $a->xet('b', 42); | |
446eaa42 YST |
1084 | print $a->xet('b') == 42 ? "ok 225\n" : "not ok 225\n"; |
1085 | print defined eval { $a->{b} } ? "not ok 226\n" : "ok 226\n"; | |
1086 | print $@ =~ /zap/ ? "ok 227\n" : "not ok 227\n"; | |
41cb1005 | 1087 | |
b3c0ec7c FD |
1088 | print overload::StrVal(qr/a/) =~ /^Regexp=SCALAR\(0x[0-9a-f]+\)$/ ? "ok 228\n" : "not ok 228\n"; |
1089 | ||
8ebc5c01 | 1090 | # Last test is: |
b3c0ec7c | 1091 | sub last {228} |