| 1 | #!./perl -T |
| 2 | |
| 3 | BEGIN { |
| 4 | chdir 't' if -d 't'; |
| 5 | @INC = '../lib'; |
| 6 | require Config; |
| 7 | if (($Config::Config{'extensions'} !~ m!\bList/Util\b!) ){ |
| 8 | print "1..0 # Skip -- Perl configured without List::Util module\n"; |
| 9 | exit 0; |
| 10 | } |
| 11 | } |
| 12 | |
| 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 |
| 34 | 0+ numify) # Order of arguments insignificant |
| 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 | |
| 49 | $| = 1; |
| 50 | BEGIN { require './test.pl' } |
| 51 | plan tests => 5199; |
| 52 | |
| 53 | use Scalar::Util qw(tainted); |
| 54 | |
| 55 | $a = new Oscalar "087"; |
| 56 | $b= "$a"; |
| 57 | |
| 58 | is($b, $a); |
| 59 | is($b, "087"); |
| 60 | is(ref $a, "Oscalar"); |
| 61 | is($a, $a); |
| 62 | is($a, "087"); |
| 63 | |
| 64 | $c = $a + 7; |
| 65 | |
| 66 | is(ref $c, "Oscalar"); |
| 67 | isnt($c, $a); |
| 68 | is($c, "94"); |
| 69 | |
| 70 | $b=$a; |
| 71 | |
| 72 | is(ref $a, "Oscalar"); |
| 73 | |
| 74 | $b++; |
| 75 | |
| 76 | is(ref $b, "Oscalar"); |
| 77 | is($a, "087"); |
| 78 | is($b, "88"); |
| 79 | is(ref $a, "Oscalar"); |
| 80 | |
| 81 | $c=$b; |
| 82 | $c-=$a; |
| 83 | |
| 84 | is(ref $c, "Oscalar"); |
| 85 | is($a, "087"); |
| 86 | is($c, "1"); |
| 87 | is(ref $a, "Oscalar"); |
| 88 | |
| 89 | $b=1; |
| 90 | $b+=$a; |
| 91 | |
| 92 | is(ref $b, "Oscalar"); |
| 93 | is($a, "087"); |
| 94 | is($b, "88"); |
| 95 | is(ref $a, "Oscalar"); |
| 96 | |
| 97 | eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ]; |
| 98 | |
| 99 | $b=$a; |
| 100 | |
| 101 | is(ref $a, "Oscalar"); |
| 102 | |
| 103 | $b++; |
| 104 | |
| 105 | is(ref $b, "Oscalar"); |
| 106 | is($a, "087"); |
| 107 | is($b, "88"); |
| 108 | is(ref $a, "Oscalar"); |
| 109 | |
| 110 | package Oscalar; |
| 111 | $dummy=bless \$dummy; # Now cache of method should be reloaded |
| 112 | package main; |
| 113 | |
| 114 | $b=$a; |
| 115 | $b++; |
| 116 | |
| 117 | is(ref $b, "Oscalar"); |
| 118 | is($a, "087"); |
| 119 | is($b, "88"); |
| 120 | is(ref $a, "Oscalar"); |
| 121 | |
| 122 | undef $b; # Destroying updates tables too... |
| 123 | |
| 124 | eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ]; |
| 125 | |
| 126 | $b=$a; |
| 127 | |
| 128 | is(ref $a, "Oscalar"); |
| 129 | |
| 130 | $b++; |
| 131 | |
| 132 | is(ref $b, "Oscalar"); |
| 133 | is($a, "087"); |
| 134 | is($b, "89"); |
| 135 | is(ref $a, "Oscalar"); |
| 136 | |
| 137 | package Oscalar; |
| 138 | $dummy=bless \$dummy; # Now cache of method should be reloaded |
| 139 | package main; |
| 140 | |
| 141 | $b++; |
| 142 | |
| 143 | is(ref $b, "Oscalar"); |
| 144 | is($a, "087"); |
| 145 | is($b, "91"); |
| 146 | is(ref $a, "Oscalar"); |
| 147 | |
| 148 | $b=$a; |
| 149 | $b++; |
| 150 | |
| 151 | is(ref $b, "Oscalar"); |
| 152 | is($a, "087"); |
| 153 | is($b, "89"); |
| 154 | is(ref $a, "Oscalar"); |
| 155 | |
| 156 | |
| 157 | ok($b? 1:0); |
| 158 | |
| 159 | eval 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 | |
| 166 | is(ref $b, "Oscalar"); |
| 167 | is($a, "087"); |
| 168 | is($b, "087"); |
| 169 | is(ref $a, "Oscalar"); |
| 170 | |
| 171 | $b++; |
| 172 | |
| 173 | is(ref $b, "Oscalar"); |
| 174 | is($a, "087"); |
| 175 | is($b, "89"); |
| 176 | is(ref $a, "Oscalar"); |
| 177 | is($copies, undef); |
| 178 | |
| 179 | $b+=1; |
| 180 | |
| 181 | is(ref $b, "Oscalar"); |
| 182 | is($a, "087"); |
| 183 | is($b, "90"); |
| 184 | is(ref $a, "Oscalar"); |
| 185 | is($copies, undef); |
| 186 | |
| 187 | $b=$a; |
| 188 | $b+=1; |
| 189 | |
| 190 | is(ref $b, "Oscalar"); |
| 191 | is($a, "087"); |
| 192 | is($b, "88"); |
| 193 | is(ref $a, "Oscalar"); |
| 194 | is($copies, undef); |
| 195 | |
| 196 | $b=$a; |
| 197 | $b++; |
| 198 | |
| 199 | is(ref $b, "Oscalar"); |
| 200 | is($a, "087"); |
| 201 | is($b, "89"); |
| 202 | is(ref $a, "Oscalar"); |
| 203 | is($copies, 1); |
| 204 | |
| 205 | eval 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 | |
| 212 | is(ref $b, "Oscalar"); |
| 213 | is($a, "087"); |
| 214 | is($b, "90"); |
| 215 | is(ref $a, "Oscalar"); |
| 216 | is($copies, 2); |
| 217 | |
| 218 | $b+=$b; |
| 219 | |
| 220 | is(ref $b, "Oscalar"); |
| 221 | is($b, "360"); |
| 222 | is($copies, 2); |
| 223 | $b=-$b; |
| 224 | |
| 225 | is(ref $b, "Oscalar"); |
| 226 | is($b, "-360"); |
| 227 | is($copies, 2); |
| 228 | |
| 229 | $b=abs($b); |
| 230 | |
| 231 | is(ref $b, "Oscalar"); |
| 232 | is($b, "360"); |
| 233 | is($copies, 2); |
| 234 | |
| 235 | $b=abs($b); |
| 236 | |
| 237 | is(ref $b, "Oscalar"); |
| 238 | is($b, "360"); |
| 239 | is($copies, 2); |
| 240 | |
| 241 | eval 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 | $a x= 3; |
| 247 | is($a, "_.yy.__.yy.__.yy._"); |
| 248 | |
| 249 | eval q[package Oscalar; |
| 250 | use overload ('.' => sub {new Oscalar ( $_[2] ? |
| 251 | "_.$_[1].__.$ {$_[0]}._" |
| 252 | : "_.$ {$_[0]}.__.$_[1]._")}) ]; |
| 253 | |
| 254 | $a=new Oscalar "xx"; |
| 255 | |
| 256 | is("b${a}c", "_._.b.__.xx._.__.c._"); |
| 257 | |
| 258 | # Check inheritance of overloading; |
| 259 | { |
| 260 | package OscalarI; |
| 261 | @ISA = 'Oscalar'; |
| 262 | } |
| 263 | |
| 264 | $aI = new OscalarI "$a"; |
| 265 | is(ref $aI, "OscalarI"); |
| 266 | is("$aI", "xx"); |
| 267 | is($aI, "xx"); |
| 268 | is("b${aI}c", "_._.b.__.xx._.__.c._"); |
| 269 | |
| 270 | # Here we test that both "no overload" and |
| 271 | # blessing to a package update hash |
| 272 | |
| 273 | eval "package Oscalar; no overload '.'"; |
| 274 | |
| 275 | is("b${a}", "bxx"); |
| 276 | $x="1"; |
| 277 | bless \$x, Oscalar; |
| 278 | is("b${a}c", "bxxc"); |
| 279 | new Oscalar 1; |
| 280 | is("b${a}c", "bxxc"); |
| 281 | |
| 282 | # Negative overloading: |
| 283 | |
| 284 | $na = eval { ~$a }; |
| 285 | like($@, qr/no method found/); |
| 286 | |
| 287 | # Check AUTOLOADING: |
| 288 | |
| 289 | *Oscalar::AUTOLOAD = |
| 290 | sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ; |
| 291 | goto &{"Oscalar::$AUTOLOAD"}}; |
| 292 | |
| 293 | eval "package Oscalar; sub comple; use overload '~' => 'comple'"; |
| 294 | |
| 295 | $na = eval { ~$a }; |
| 296 | is($@, ''); |
| 297 | |
| 298 | bless \$x, Oscalar; |
| 299 | |
| 300 | $na = eval { ~$a }; # Hash updated |
| 301 | warn "'$na', $@" if $@; |
| 302 | ok !$@; |
| 303 | is($na, '_!_xx_!_'); |
| 304 | |
| 305 | $na = 0; |
| 306 | |
| 307 | $na = eval { ~$aI }; |
| 308 | is($@, ''); |
| 309 | |
| 310 | bless \$x, OscalarI; |
| 311 | |
| 312 | $na = eval { ~$aI }; |
| 313 | print $@; |
| 314 | |
| 315 | ok(!$@); |
| 316 | is($na, '_!_xx_!_'); |
| 317 | |
| 318 | eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'"; |
| 319 | |
| 320 | $na = eval { $aI >> 1 }; |
| 321 | is($@, ''); |
| 322 | |
| 323 | bless \$x, OscalarI; |
| 324 | |
| 325 | $na = 0; |
| 326 | |
| 327 | $na = eval { $aI >> 1 }; |
| 328 | print $@; |
| 329 | |
| 330 | ok(!$@); |
| 331 | is($na, '_!_xx_!_'); |
| 332 | |
| 333 | # warn overload::Method($a, '0+'), "\n"; |
| 334 | is(overload::Method($a, '0+'), \&Oscalar::numify); |
| 335 | is(overload::Method($aI,'0+'), \&Oscalar::numify); |
| 336 | ok(overload::Overloaded($aI)); |
| 337 | ok(!overload::Overloaded('overload')); |
| 338 | |
| 339 | ok(! defined overload::Method($aI, '<<')); |
| 340 | ok(! defined overload::Method($a, '<')); |
| 341 | |
| 342 | like (overload::StrVal($aI), qr/^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); |
| 343 | is(overload::StrVal(\$aI), "@{[\$aI]}"); |
| 344 | |
| 345 | # Check overloading by methods (specified deep in the ISA tree). |
| 346 | { |
| 347 | package OscalarII; |
| 348 | @ISA = 'OscalarI'; |
| 349 | sub Oscalar::lshft {"_<<_" . shift() . "_<<_"} |
| 350 | eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'"; |
| 351 | } |
| 352 | |
| 353 | $aaII = "087"; |
| 354 | $aII = \$aaII; |
| 355 | bless $aII, 'OscalarII'; |
| 356 | bless \$fake, 'OscalarI'; # update the hash |
| 357 | is(($aI | 3), '_<<_xx_<<_'); |
| 358 | # warn $aII << 3; |
| 359 | is(($aII << 3), '_<<_087_<<_'); |
| 360 | |
| 361 | { |
| 362 | BEGIN { $int = 7; overload::constant 'integer' => sub {$int++; shift}; } |
| 363 | $out = 2**10; |
| 364 | } |
| 365 | is($int, 9); |
| 366 | is($out, 1024); |
| 367 | is($int, 9); |
| 368 | { |
| 369 | BEGIN { overload::constant 'integer' => sub {$int++; shift()+1}; } |
| 370 | eval q{$out = 42}; |
| 371 | } |
| 372 | is($int, 10); |
| 373 | is($out, 43); |
| 374 | |
| 375 | $foo = 'foo'; |
| 376 | $foo1 = 'f\'o\\o'; |
| 377 | { |
| 378 | BEGIN { $q = $qr = 7; |
| 379 | overload::constant 'q' => sub {$q++; push @q, shift, ($_[1] || 'none'); shift}, |
| 380 | 'qr' => sub {$qr++; push @qr, shift, ($_[1] || 'none'); shift}; } |
| 381 | $out = 'foo'; |
| 382 | $out1 = 'f\'o\\o'; |
| 383 | $out2 = "a\a$foo,\,"; |
| 384 | /b\b$foo.\./; |
| 385 | } |
| 386 | |
| 387 | is($out, 'foo'); |
| 388 | is($out, $foo); |
| 389 | is($out1, 'f\'o\\o'); |
| 390 | is($out1, $foo1); |
| 391 | is($out2, "a\afoo,\,"); |
| 392 | is("@q", "foo q f'o\\\\o q a\\a qq ,\\, qq"); |
| 393 | is($q, 11); |
| 394 | is("@qr", "b\\b qq .\\. qq"); |
| 395 | is($qr, 9); |
| 396 | |
| 397 | { |
| 398 | $_ = '!<b>!foo!<-.>!'; |
| 399 | BEGIN { overload::constant 'q' => sub {push @q1, shift, ($_[1] || 'none'); "_<" . (shift) . ">_"}, |
| 400 | 'qr' => sub {push @qr1, shift, ($_[1] || 'none'); "!<" . (shift) . ">!"}; } |
| 401 | $out = 'foo'; |
| 402 | $out1 = 'f\'o\\o'; |
| 403 | $out2 = "a\a$foo,\,"; |
| 404 | $res = /b\b$foo.\./; |
| 405 | $a = <<EOF; |
| 406 | oups |
| 407 | EOF |
| 408 | $b = <<'EOF'; |
| 409 | oups1 |
| 410 | EOF |
| 411 | $c = bareword; |
| 412 | m'try it'; |
| 413 | s'first part'second part'; |
| 414 | s/yet another/tail here/; |
| 415 | tr/A-Z/a-z/; |
| 416 | } |
| 417 | |
| 418 | is($out, '_<foo>_'); |
| 419 | is($out1, '_<f\'o\\o>_'); |
| 420 | is($out2, "_<a\a>_foo_<,\,>_"); |
| 421 | is("@q1", "foo q f'o\\\\o q a\\a qq ,\\, qq oups |
| 422 | qq oups1 |
| 423 | q second part q tail here s A-Z tr a-z tr"); |
| 424 | is("@qr1", "b\\b qq .\\. qq try it q first part q yet another qq"); |
| 425 | is($res, 1); |
| 426 | is($a, "_<oups |
| 427 | >_"); |
| 428 | is($b, "_<oups1 |
| 429 | >_"); |
| 430 | is($c, "bareword"); |
| 431 | |
| 432 | { |
| 433 | package symbolic; # Primitive symbolic calculator |
| 434 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, |
| 435 | '=' => \&cpy, '++' => \&inc, '--' => \&dec; |
| 436 | |
| 437 | sub new { shift; bless ['n', @_] } |
| 438 | sub cpy { |
| 439 | my $self = shift; |
| 440 | bless [@$self], ref $self; |
| 441 | } |
| 442 | sub inc { $_[0] = bless ['++', $_[0], 1]; } |
| 443 | sub dec { $_[0] = bless ['--', $_[0], 1]; } |
| 444 | sub wrap { |
| 445 | my ($obj, $other, $inv, $meth) = @_; |
| 446 | if ($meth eq '++' or $meth eq '--') { |
| 447 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference |
| 448 | return $obj; |
| 449 | } |
| 450 | ($obj, $other) = ($other, $obj) if $inv; |
| 451 | bless [$meth, $obj, $other]; |
| 452 | } |
| 453 | sub str { |
| 454 | my ($meth, $a, $b) = @{+shift}; |
| 455 | $a = 'u' unless defined $a; |
| 456 | if (defined $b) { |
| 457 | "[$meth $a $b]"; |
| 458 | } else { |
| 459 | "[$meth $a]"; |
| 460 | } |
| 461 | } |
| 462 | my %subr = ( 'n' => sub {$_[0]} ); |
| 463 | foreach my $op (split " ", $overload::ops{with_assign}) { |
| 464 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; |
| 465 | } |
| 466 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); |
| 467 | foreach my $op (split " ", "@overload::ops{ @bins }") { |
| 468 | $subr{$op} = eval "sub {shift() $op shift()}"; |
| 469 | } |
| 470 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { |
| 471 | $subr{$op} = eval "sub {$op shift()}"; |
| 472 | } |
| 473 | $subr{'++'} = $subr{'+'}; |
| 474 | $subr{'--'} = $subr{'-'}; |
| 475 | |
| 476 | sub num { |
| 477 | my ($meth, $a, $b) = @{+shift}; |
| 478 | my $subr = $subr{$meth} |
| 479 | or die "Do not know how to ($meth) in symbolic"; |
| 480 | $a = $a->num if ref $a eq __PACKAGE__; |
| 481 | $b = $b->num if ref $b eq __PACKAGE__; |
| 482 | $subr->($a,$b); |
| 483 | } |
| 484 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } |
| 485 | sub FETCH { shift } |
| 486 | sub nop { } # Around a bug |
| 487 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; } |
| 488 | sub STORE { |
| 489 | my $obj = shift; |
| 490 | $#$obj = 1; |
| 491 | $obj->[1] = shift; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | { |
| 496 | my $foo = new symbolic 11; |
| 497 | my $baz = $foo++; |
| 498 | is((sprintf "%d", $foo), '12'); |
| 499 | is((sprintf "%d", $baz), '11'); |
| 500 | my $bar = $foo; |
| 501 | $baz = ++$foo; |
| 502 | is((sprintf "%d", $foo), '13'); |
| 503 | is((sprintf "%d", $bar), '12'); |
| 504 | is((sprintf "%d", $baz), '13'); |
| 505 | my $ban = $foo; |
| 506 | $baz = ($foo += 1); |
| 507 | is((sprintf "%d", $foo), '14'); |
| 508 | is((sprintf "%d", $bar), '12'); |
| 509 | is((sprintf "%d", $baz), '14'); |
| 510 | is((sprintf "%d", $ban), '13'); |
| 511 | $baz = 0; |
| 512 | $baz = $foo++; |
| 513 | is((sprintf "%d", $foo), '15'); |
| 514 | is((sprintf "%d", $baz), '14'); |
| 515 | is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]'); |
| 516 | } |
| 517 | |
| 518 | { |
| 519 | my $iter = new symbolic 2; |
| 520 | my $side = new symbolic 1; |
| 521 | my $cnt = $iter; |
| 522 | |
| 523 | while ($cnt) { |
| 524 | $cnt = $cnt - 1; # The "simple" way |
| 525 | $side = (sqrt(1 + $side**2) - 1)/$side; |
| 526 | } |
| 527 | my $pi = $side*(2**($iter+2)); |
| 528 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
| 529 | is((sprintf "%f", $pi), '3.182598'); |
| 530 | } |
| 531 | |
| 532 | { |
| 533 | my $iter = new symbolic 2; |
| 534 | my $side = new symbolic 1; |
| 535 | my $cnt = $iter; |
| 536 | |
| 537 | while ($cnt--) { |
| 538 | $side = (sqrt(1 + $side**2) - 1)/$side; |
| 539 | } |
| 540 | my $pi = $side*(2**($iter+2)); |
| 541 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
| 542 | is((sprintf "%f", $pi), '3.182598'); |
| 543 | } |
| 544 | |
| 545 | { |
| 546 | my ($a, $b); |
| 547 | symbolic->vars($a, $b); |
| 548 | my $c = sqrt($a**2 + $b**2); |
| 549 | $a = 3; $b = 4; |
| 550 | is((sprintf "%d", $c), '5'); |
| 551 | $a = 12; $b = 5; |
| 552 | is((sprintf "%d", $c), '13'); |
| 553 | } |
| 554 | |
| 555 | { |
| 556 | package symbolic1; # Primitive symbolic calculator |
| 557 | # Mutator inc/dec |
| 558 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, '=' => \&cpy; |
| 559 | |
| 560 | sub new { shift; bless ['n', @_] } |
| 561 | sub cpy { |
| 562 | my $self = shift; |
| 563 | bless [@$self], ref $self; |
| 564 | } |
| 565 | sub wrap { |
| 566 | my ($obj, $other, $inv, $meth) = @_; |
| 567 | if ($meth eq '++' or $meth eq '--') { |
| 568 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference |
| 569 | return $obj; |
| 570 | } |
| 571 | ($obj, $other) = ($other, $obj) if $inv; |
| 572 | bless [$meth, $obj, $other]; |
| 573 | } |
| 574 | sub str { |
| 575 | my ($meth, $a, $b) = @{+shift}; |
| 576 | $a = 'u' unless defined $a; |
| 577 | if (defined $b) { |
| 578 | "[$meth $a $b]"; |
| 579 | } else { |
| 580 | "[$meth $a]"; |
| 581 | } |
| 582 | } |
| 583 | my %subr = ( 'n' => sub {$_[0]} ); |
| 584 | foreach my $op (split " ", $overload::ops{with_assign}) { |
| 585 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; |
| 586 | } |
| 587 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); |
| 588 | foreach my $op (split " ", "@overload::ops{ @bins }") { |
| 589 | $subr{$op} = eval "sub {shift() $op shift()}"; |
| 590 | } |
| 591 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { |
| 592 | $subr{$op} = eval "sub {$op shift()}"; |
| 593 | } |
| 594 | $subr{'++'} = $subr{'+'}; |
| 595 | $subr{'--'} = $subr{'-'}; |
| 596 | |
| 597 | sub num { |
| 598 | my ($meth, $a, $b) = @{+shift}; |
| 599 | my $subr = $subr{$meth} |
| 600 | or die "Do not know how to ($meth) in symbolic"; |
| 601 | $a = $a->num if ref $a eq __PACKAGE__; |
| 602 | $b = $b->num if ref $b eq __PACKAGE__; |
| 603 | $subr->($a,$b); |
| 604 | } |
| 605 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } |
| 606 | sub FETCH { shift } |
| 607 | sub vars { my $p = shift; tie($_, $p) foreach @_; } |
| 608 | sub STORE { |
| 609 | my $obj = shift; |
| 610 | $#$obj = 1; |
| 611 | $obj->[1] = shift; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | { |
| 616 | my $foo = new symbolic1 11; |
| 617 | my $baz = $foo++; |
| 618 | is((sprintf "%d", $foo), '12'); |
| 619 | is((sprintf "%d", $baz), '11'); |
| 620 | my $bar = $foo; |
| 621 | $baz = ++$foo; |
| 622 | is((sprintf "%d", $foo), '13'); |
| 623 | is((sprintf "%d", $bar), '12'); |
| 624 | is((sprintf "%d", $baz), '13'); |
| 625 | my $ban = $foo; |
| 626 | $baz = ($foo += 1); |
| 627 | is((sprintf "%d", $foo), '14'); |
| 628 | is((sprintf "%d", $bar), '12'); |
| 629 | is((sprintf "%d", $baz), '14'); |
| 630 | is((sprintf "%d", $ban), '13'); |
| 631 | $baz = 0; |
| 632 | $baz = $foo++; |
| 633 | is((sprintf "%d", $foo), '15'); |
| 634 | is((sprintf "%d", $baz), '14'); |
| 635 | is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]'); |
| 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)); |
| 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'); |
| 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)); |
| 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", $pi), '3.182598'); |
| 663 | } |
| 664 | |
| 665 | { |
| 666 | my ($a, $b); |
| 667 | symbolic1->vars($a, $b); |
| 668 | my $c = sqrt($a**2 + $b**2); |
| 669 | $a = 3; $b = 4; |
| 670 | is((sprintf "%d", $c), '5'); |
| 671 | $a = 12; $b = 5; |
| 672 | is((sprintf "%d", $c), '13'); |
| 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 $seven = new two_face ("vii", 7); |
| 686 | is((sprintf "seven=$seven, seven=%d, eight=%d", $seven, $seven+1), |
| 687 | 'seven=vii, seven=7, eight=8'); |
| 688 | is(scalar ($seven =~ /i/), '1'); |
| 689 | } |
| 690 | |
| 691 | { |
| 692 | package sorting; |
| 693 | use overload 'cmp' => \∁ |
| 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 $$_, @sorted1; |
| 701 | is("@sorted2", '0 10 7 4 1 11 8 5 12 2 9 6 3'); |
| 702 | } |
| 703 | { |
| 704 | package iterator; |
| 705 | use overload '<>' => \&iter; |
| 706 | sub new { my ($p, $v) = @_; bless \$v, $p } |
| 707 | sub iter { my ($x) = @_; return undef if $$x < 0; return $$x--; } |
| 708 | } |
| 709 | |
| 710 | { |
| 711 | my $iter = iterator->new(5); |
| 712 | my $acc = ''; |
| 713 | my $out; |
| 714 | $acc .= " $out" while $out = <${iter}>; |
| 715 | is($acc, ' 5 4 3 2 1 0'); |
| 716 | $iter = iterator->new(5); |
| 717 | is(scalar <${iter}>, '5'); |
| 718 | $acc = ''; |
| 719 | $acc .= " $out" while $out = <$iter>; |
| 720 | is($acc, ' 4 3 2 1 0'); |
| 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; |
| 750 | if ("\t" eq "\011") { # ASCII |
| 751 | is("@cont", '23 5 fake foo'); |
| 752 | } |
| 753 | else { # EBCDIC alpha-numeric sort order |
| 754 | is("@cont", 'fake foo 23 5'); |
| 755 | } |
| 756 | my @keys = sort keys %$deref; |
| 757 | is("@keys", 'fake foo'); |
| 758 | my @val = sort values %$deref; |
| 759 | is("@val", '23 5'); |
| 760 | is($deref->{foo}, 5); |
| 761 | is(defined $deref->{bar}, ''); |
| 762 | my $key; |
| 763 | @keys = (); |
| 764 | push @keys, $key while $key = each %$deref; |
| 765 | @keys = sort @keys; |
| 766 | is("@keys", 'fake foo'); |
| 767 | is(exists $deref->{bar}, ''); |
| 768 | is(exists $deref->{foo}, 1); |
| 769 | # Code: |
| 770 | is($deref->(5), 39); |
| 771 | is(&$deref(6), 40); |
| 772 | sub xxx_goto { goto &$deref } |
| 773 | is(xxx_goto(7), 41); |
| 774 | my $srt = bless { c => sub {$b <=> $a} |
| 775 | }, 'deref'; |
| 776 | *srt = \&$srt; |
| 777 | my @sorted = sort srt 11, 2, 5, 1, 22; |
| 778 | is("@sorted", '22 11 5 2 1'); |
| 779 | # Scalar |
| 780 | is($$deref, 123); |
| 781 | # Code |
| 782 | @sorted = sort $srt 11, 2, 5, 1, 22; |
| 783 | is("@sorted", '22 11 5 2 1'); |
| 784 | # Array |
| 785 | is("@$deref", '11 12 13'); |
| 786 | is($#$deref, '2'); |
| 787 | my $l = @$deref; |
| 788 | is($l, 3); |
| 789 | is($deref->[2], '13'); |
| 790 | $l = pop @$deref; |
| 791 | is($l, 13); |
| 792 | $l = 1; |
| 793 | is($deref->[$l], '12'); |
| 794 | # Repeated dereference |
| 795 | my $double = bless { h => $deref, |
| 796 | }, 'deref'; |
| 797 | is($double->{foo}, 5); |
| 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 | |
| 832 | my $bar = new two_refs 3,4,5,6; |
| 833 | $bar->[2] = 11; |
| 834 | is($bar->{two}, 11); |
| 835 | $bar->{three} = 13; |
| 836 | is($bar->[3], 13); |
| 837 | |
| 838 | { |
| 839 | package two_refs_o; |
| 840 | @ISA = ('two_refs'); |
| 841 | } |
| 842 | |
| 843 | $bar = new two_refs_o 3,4,5,6; |
| 844 | $bar->[2] = 11; |
| 845 | is($bar->{two}, 11); |
| 846 | $bar->{three} = 13; |
| 847 | is($bar->[3], 13); |
| 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 | $bar->[2] = 11; |
| 887 | is($bar->{two}, 11); |
| 888 | $bar->{three} = 13; |
| 889 | is($bar->[3], 13); |
| 890 | |
| 891 | { |
| 892 | package two_refs1_o; |
| 893 | @ISA = ('two_refs1'); |
| 894 | } |
| 895 | |
| 896 | $bar = new two_refs1_o 3,4,5,6; |
| 897 | $bar->[2] = 11; |
| 898 | is($bar->{two}, 11); |
| 899 | $bar->{three} = 13; |
| 900 | is($bar->[3], 13); |
| 901 | |
| 902 | { |
| 903 | package B; |
| 904 | use overload bool => sub { ${+shift} }; |
| 905 | } |
| 906 | |
| 907 | my $aaa; |
| 908 | { my $bbbb = 0; $aaa = bless \$bbbb, B } |
| 909 | |
| 910 | is !$aaa, 1; |
| 911 | |
| 912 | unless ($aaa) { |
| 913 | pass(); |
| 914 | } else { |
| 915 | fail(); |
| 916 | } |
| 917 | |
| 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([]); |
| 923 | main::is $x, '0pq1'; |
| 924 | }; |
| 925 | |
| 926 | # Test module-specific warning |
| 927 | { |
| 928 | # check the Odd number of arguments for overload::constant warning |
| 929 | my $a = "" ; |
| 930 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
| 931 | $x = eval ' overload::constant "integer" ; ' ; |
| 932 | is($a, ""); |
| 933 | use warnings 'overload' ; |
| 934 | $x = eval ' overload::constant "integer" ; ' ; |
| 935 | like($a, qr/^Odd number of arguments for overload::constant at/); |
| 936 | } |
| 937 | |
| 938 | { |
| 939 | # check the '$_[0]' is not an overloadable type warning |
| 940 | my $a = "" ; |
| 941 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
| 942 | $x = eval ' overload::constant "fred" => sub {} ; ' ; |
| 943 | is($a, ""); |
| 944 | use warnings 'overload' ; |
| 945 | $x = eval ' overload::constant "fred" => sub {} ; ' ; |
| 946 | like($a, qr/^'fred' is not an overloadable type at/); |
| 947 | } |
| 948 | |
| 949 | { |
| 950 | # check the '$_[1]' is not a code reference warning |
| 951 | my $a = "" ; |
| 952 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
| 953 | $x = eval ' overload::constant "integer" => 1; ' ; |
| 954 | is($a, ""); |
| 955 | use warnings 'overload' ; |
| 956 | $x = eval ' overload::constant "integer" => 1; ' ; |
| 957 | like($a, qr/^'1' is not a code reference at/); |
| 958 | } |
| 959 | |
| 960 | { |
| 961 | # check the invalid argument warning [perl #74098] |
| 962 | my $a = "" ; |
| 963 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
| 964 | $x = eval ' use overload "~|_|~" => sub{} ' ; |
| 965 | eval ' no overload "~|_|~" ' ; |
| 966 | is($a, ""); |
| 967 | use warnings 'overload' ; |
| 968 | $x = eval ' use overload "~|_|~" => sub{} ' ; |
| 969 | like($a, qr/^overload arg '~\|_\|~' is invalid at \(eval \d+\) line /, |
| 970 | 'invalid arg warning'); |
| 971 | undef $a; |
| 972 | eval ' no overload "~|_|~" ' ; |
| 973 | like($a, qr/^overload arg '~\|_\|~' is invalid at \(eval \d+\) line /, |
| 974 | 'invalid arg warning'); |
| 975 | } |
| 976 | |
| 977 | { |
| 978 | my $c = 0; |
| 979 | package ov_int1; |
| 980 | use overload '""' => sub { 3+shift->[0] }, |
| 981 | '0+' => sub { 10+shift->[0] }, |
| 982 | 'int' => sub { 100+shift->[0] }; |
| 983 | sub new {my $p = shift; bless [shift], $p} |
| 984 | |
| 985 | package ov_int2; |
| 986 | use overload '""' => sub { 5+shift->[0] }, |
| 987 | '0+' => sub { 30+shift->[0] }, |
| 988 | 'int' => sub { 'ov_int1'->new(1000+shift->[0]) }; |
| 989 | sub new {my $p = shift; bless [shift], $p} |
| 990 | |
| 991 | package noov_int; |
| 992 | use overload '""' => sub { 2+shift->[0] }, |
| 993 | '0+' => sub { 9+shift->[0] }; |
| 994 | sub new {my $p = shift; bless [shift], $p} |
| 995 | |
| 996 | package main; |
| 997 | |
| 998 | my $x = new noov_int 11; |
| 999 | my $int_x = int $x; |
| 1000 | main::is("$int_x", 20); |
| 1001 | $x = new ov_int1 31; |
| 1002 | $int_x = int $x; |
| 1003 | main::is("$int_x", 131); |
| 1004 | $x = new ov_int2 51; |
| 1005 | $int_x = int $x; |
| 1006 | main::is("$int_x", 1054); |
| 1007 | } |
| 1008 | |
| 1009 | # make sure that we don't infinitely recurse |
| 1010 | { |
| 1011 | my $c = 0; |
| 1012 | package Recurse; |
| 1013 | use overload '""' => sub { shift }, |
| 1014 | '0+' => sub { shift }, |
| 1015 | 'bool' => sub { shift }, |
| 1016 | fallback => 1; |
| 1017 | my $x = bless([]); |
| 1018 | # For some reason beyond me these have to be oks rather than likes. |
| 1019 | main::ok("$x" =~ /Recurse=ARRAY/); |
| 1020 | main::ok($x); |
| 1021 | main::ok($x+0 =~ qr/Recurse=ARRAY/); |
| 1022 | } |
| 1023 | |
| 1024 | # BugID 20010422.003 |
| 1025 | package Foo; |
| 1026 | |
| 1027 | use overload |
| 1028 | 'bool' => sub { return !$_[0]->is_zero() || undef; } |
| 1029 | ; |
| 1030 | |
| 1031 | sub is_zero |
| 1032 | { |
| 1033 | my $self = shift; |
| 1034 | return $self->{var} == 0; |
| 1035 | } |
| 1036 | |
| 1037 | sub new |
| 1038 | { |
| 1039 | my $class = shift; |
| 1040 | my $self = {}; |
| 1041 | $self->{var} = shift; |
| 1042 | bless $self,$class; |
| 1043 | } |
| 1044 | |
| 1045 | package main; |
| 1046 | |
| 1047 | use strict; |
| 1048 | |
| 1049 | my $r = Foo->new(8); |
| 1050 | $r = Foo->new(0); |
| 1051 | |
| 1052 | is(($r || 0), 0); |
| 1053 | |
| 1054 | package utf8_o; |
| 1055 | |
| 1056 | use overload |
| 1057 | '""' => sub { return $_[0]->{var}; } |
| 1058 | ; |
| 1059 | |
| 1060 | sub new |
| 1061 | { |
| 1062 | my $class = shift; |
| 1063 | my $self = {}; |
| 1064 | $self->{var} = shift; |
| 1065 | bless $self,$class; |
| 1066 | } |
| 1067 | |
| 1068 | package main; |
| 1069 | |
| 1070 | |
| 1071 | my $utfvar = new utf8_o 200.2.1; |
| 1072 | is("$utfvar", 200.2.1); # 223 - stringify |
| 1073 | is("a$utfvar", "a".200.2.1); # 224 - overload via sv_2pv_flags |
| 1074 | |
| 1075 | # 225..227 -- more %{} tests. Hangs in 5.6.0, okay in later releases. |
| 1076 | # Basically this example implements strong encapsulation: if Hderef::import() |
| 1077 | # were to eval the overload code in the caller's namespace, the privatisation |
| 1078 | # would be quite transparent. |
| 1079 | package Hderef; |
| 1080 | use overload '%{}' => sub { (caller(0))[0] eq 'Foo' ? $_[0] : die "zap" }; |
| 1081 | package Foo; |
| 1082 | @Foo::ISA = 'Hderef'; |
| 1083 | sub new { bless {}, shift } |
| 1084 | sub xet { @_ == 2 ? $_[0]->{$_[1]} : |
| 1085 | @_ == 3 ? ($_[0]->{$_[1]} = $_[2]) : undef } |
| 1086 | package main; |
| 1087 | my $a = Foo->new; |
| 1088 | $a->xet('b', 42); |
| 1089 | is ($a->xet('b'), 42); |
| 1090 | ok (!defined eval { $a->{b} }); |
| 1091 | like ($@, qr/zap/); |
| 1092 | |
| 1093 | { |
| 1094 | package t229; |
| 1095 | use overload '=' => sub { 42 }, |
| 1096 | '++' => sub { my $x = ${$_[0]}; $_[0] }; |
| 1097 | sub new { my $x = 42; bless \$x } |
| 1098 | |
| 1099 | my $warn; |
| 1100 | { |
| 1101 | local $SIG{__WARN__} = sub { $warn++ }; |
| 1102 | my $x = t229->new; |
| 1103 | my $y = $x; |
| 1104 | eval { $y++ }; |
| 1105 | } |
| 1106 | main::ok (!$warn); |
| 1107 | } |
| 1108 | |
| 1109 | { |
| 1110 | my ($int, $out1, $out2); |
| 1111 | { |
| 1112 | BEGIN { $int = 0; overload::constant 'integer' => sub {$int++; 17}; } |
| 1113 | $out1 = 0; |
| 1114 | $out2 = 1; |
| 1115 | } |
| 1116 | is($int, 2, "#24313"); # 230 |
| 1117 | is($out1, 17, "#24313"); # 231 |
| 1118 | is($out2, 17, "#24313"); # 232 |
| 1119 | } |
| 1120 | |
| 1121 | { |
| 1122 | package perl31793; |
| 1123 | use overload cmp => sub { 0 }; |
| 1124 | package perl31793_fb; |
| 1125 | use overload cmp => sub { 0 }, fallback => 1; |
| 1126 | package main; |
| 1127 | my $o = bless [], 'perl31793'; |
| 1128 | my $of = bless [], 'perl31793_fb'; |
| 1129 | my $no = bless [], 'no_overload'; |
| 1130 | like(overload::StrVal(\"scalar"), qr/^SCALAR\(0x[0-9a-f]+\)$/); |
| 1131 | like(overload::StrVal([]), qr/^ARRAY\(0x[0-9a-f]+\)$/); |
| 1132 | like(overload::StrVal({}), qr/^HASH\(0x[0-9a-f]+\)$/); |
| 1133 | like(overload::StrVal(sub{1}), qr/^CODE\(0x[0-9a-f]+\)$/); |
| 1134 | like(overload::StrVal(\*GLOB), qr/^GLOB\(0x[0-9a-f]+\)$/); |
| 1135 | like(overload::StrVal(\$o), qr/^REF\(0x[0-9a-f]+\)$/); |
| 1136 | like(overload::StrVal(qr/a/), qr/^Regexp=REGEXP\(0x[0-9a-f]+\)$/); |
| 1137 | like(overload::StrVal($o), qr/^perl31793=ARRAY\(0x[0-9a-f]+\)$/); |
| 1138 | like(overload::StrVal($of), qr/^perl31793_fb=ARRAY\(0x[0-9a-f]+\)$/); |
| 1139 | like(overload::StrVal($no), qr/^no_overload=ARRAY\(0x[0-9a-f]+\)$/); |
| 1140 | } |
| 1141 | |
| 1142 | { |
| 1143 | package Numify; |
| 1144 | use overload (qw(0+ numify fallback 1)); |
| 1145 | |
| 1146 | sub new { |
| 1147 | my $val = $_[1]; |
| 1148 | bless \$val, $_[0]; |
| 1149 | } |
| 1150 | |
| 1151 | sub numify { ${$_[0]} } |
| 1152 | } |
| 1153 | |
| 1154 | # These all check that overloaded values, rather than reference addresses, |
| 1155 | # are what are getting tested. |
| 1156 | my ($two, $one, $un, $deux) = map {new Numify $_} 2, 1, 1, 2; |
| 1157 | my ($ein, $zwei) = (1, 2); |
| 1158 | |
| 1159 | my %map = (one => 1, un => 1, ein => 1, deux => 2, two => 2, zwei => 2); |
| 1160 | foreach my $op (qw(<=> == != < <= > >=)) { |
| 1161 | foreach my $l (keys %map) { |
| 1162 | foreach my $r (keys %map) { |
| 1163 | my $ocode = "\$$l $op \$$r"; |
| 1164 | my $rcode = "$map{$l} $op $map{$r}"; |
| 1165 | |
| 1166 | my $got = eval $ocode; |
| 1167 | die if $@; |
| 1168 | my $expect = eval $rcode; |
| 1169 | die if $@; |
| 1170 | is ($got, $expect, $ocode) or print "# $rcode\n"; |
| 1171 | } |
| 1172 | } |
| 1173 | } |
| 1174 | { |
| 1175 | # check that overloading works in regexes |
| 1176 | { |
| 1177 | package Foo493; |
| 1178 | use overload |
| 1179 | '""' => sub { "^$_[0][0]\$" }, |
| 1180 | '.' => sub { |
| 1181 | bless [ |
| 1182 | $_[2] |
| 1183 | ? (ref $_[1] ? $_[1][0] : $_[1]) . ':' .$_[0][0] |
| 1184 | : $_[0][0] . ':' . (ref $_[1] ? $_[1][0] : $_[1]) |
| 1185 | ], 'Foo493' |
| 1186 | }; |
| 1187 | } |
| 1188 | |
| 1189 | my $a = bless [ "a" ], 'Foo493'; |
| 1190 | like('a', qr/$a/); |
| 1191 | like('x:a', qr/x$a/); |
| 1192 | like('x:a:=', qr/x$a=$/); |
| 1193 | like('x:a:a:=', qr/x$a$a=$/); |
| 1194 | |
| 1195 | } |
| 1196 | |
| 1197 | { |
| 1198 | { |
| 1199 | package QRonly; |
| 1200 | use overload qr => sub { qr/x/ }, fallback => 1; |
| 1201 | } |
| 1202 | { |
| 1203 | my $x = bless [], "QRonly"; |
| 1204 | |
| 1205 | # like tries to be too clever, and decides that $x-stringified |
| 1206 | # doesn't look like a regex |
| 1207 | ok("x" =~ $x, "qr-only matches"); |
| 1208 | ok("y" !~ $x, "qr-only doesn't match what it shouldn't"); |
| 1209 | ok("x" =~ /^(??{$x})$/, "qr-only with ?? matches"); |
| 1210 | ok("y" !~ /^(??{$x})$/, "qr-only with ?? doesn't match what it shouldn't"); |
| 1211 | ok("xx" =~ /x$x/, "qr-only matches with concat"); |
| 1212 | like("$x", qr/^QRonly=ARRAY/, "qr-only doesn't have string overload"); |
| 1213 | |
| 1214 | my $qr = bless qr/y/, "QRonly"; |
| 1215 | ok("x" =~ $qr, "qr with qr-overload uses overload"); |
| 1216 | ok("y" !~ $qr, "qr with qr-overload uses overload"); |
| 1217 | ok("x" =~ /^(??{$qr})$/, "qr with qr-overload with ?? uses overload"); |
| 1218 | ok("y" !~ /^(??{$qr})$/, "qr with qr-overload with ?? uses overload"); |
| 1219 | is("$qr", "".qr/y/, "qr with qr-overload stringify"); |
| 1220 | |
| 1221 | my $rx = $$qr; |
| 1222 | ok("y" =~ $rx, "bare rx with qr-overload doesn't overload match"); |
| 1223 | ok("x" !~ $rx, "bare rx with qr-overload doesn't overload match"); |
| 1224 | ok("y" =~ /^(??{$rx})$/, "bare rx with qr-overload with ?? doesn't overload match"); |
| 1225 | ok("x" !~ /^(??{$rx})$/, "bare rx with qr-overload with ?? doesn't overload match"); |
| 1226 | is("$rx", "".qr/y/, "bare rx with qr-overload stringify"); |
| 1227 | } |
| 1228 | { |
| 1229 | package QRandSTR; |
| 1230 | use overload qr => sub { qr/x/ }, q/""/ => sub { "y" }; |
| 1231 | } |
| 1232 | { |
| 1233 | my $x = bless [], "QRandSTR"; |
| 1234 | ok("x" =~ $x, "qr+str uses qr for match"); |
| 1235 | ok("y" !~ $x, "qr+str uses qr for match"); |
| 1236 | ok("xx" =~ /x$x/, "qr+str uses qr for match with concat"); |
| 1237 | is("$x", "y", "qr+str uses str for stringify"); |
| 1238 | |
| 1239 | my $qr = bless qr/z/, "QRandSTR"; |
| 1240 | is("$qr", "y", "qr with qr+str uses str for stringify"); |
| 1241 | ok("xx" =~ /x$x/, "qr with qr+str uses qr for match"); |
| 1242 | |
| 1243 | my $rx = $$qr; |
| 1244 | ok("z" =~ $rx, "bare rx with qr+str doesn't overload match"); |
| 1245 | is("$rx", "".qr/z/, "bare rx with qr+str doesn't overload stringify"); |
| 1246 | } |
| 1247 | { |
| 1248 | package QRany; |
| 1249 | use overload qr => sub { $_[0]->(@_) }; |
| 1250 | |
| 1251 | package QRself; |
| 1252 | use overload qr => sub { $_[0] }; |
| 1253 | } |
| 1254 | { |
| 1255 | my $rx = bless sub { ${ qr/x/ } }, "QRany"; |
| 1256 | ok("x" =~ $rx, "qr overload accepts a bare rx"); |
| 1257 | ok("y" !~ $rx, "qr overload accepts a bare rx"); |
| 1258 | |
| 1259 | my $str = bless sub { "x" }, "QRany"; |
| 1260 | ok(!eval { "x" =~ $str }, "qr overload doesn't accept a string"); |
| 1261 | like($@, qr/^Overloaded qr did not return a REGEXP/, "correct error"); |
| 1262 | |
| 1263 | my $oqr = bless qr/z/, "QRandSTR"; |
| 1264 | my $oqro = bless sub { $oqr }, "QRany"; |
| 1265 | ok("z" =~ $oqro, "qr overload doesn't recurse"); |
| 1266 | |
| 1267 | my $qrs = bless qr/z/, "QRself"; |
| 1268 | ok("z" =~ $qrs, "qr overload can return self"); |
| 1269 | } |
| 1270 | { |
| 1271 | package STRonly; |
| 1272 | use overload q/""/ => sub { "x" }; |
| 1273 | |
| 1274 | package STRonlyFB; |
| 1275 | use overload q/""/ => sub { "x" }, fallback => 1; |
| 1276 | } |
| 1277 | { |
| 1278 | my $fb = bless [], "STRonlyFB"; |
| 1279 | ok("x" =~ $fb, "qr falls back to \"\""); |
| 1280 | ok("y" !~ $fb, "qr falls back to \"\""); |
| 1281 | |
| 1282 | my $nofb = bless [], "STRonly"; |
| 1283 | ok("x" =~ $nofb, "qr falls back even without fallback"); |
| 1284 | ok("y" !~ $nofb, "qr falls back even without fallback"); |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | { |
| 1289 | my $twenty_three = 23; |
| 1290 | # Check that constant overloading propagates into evals |
| 1291 | BEGIN { overload::constant integer => sub { 23 } } |
| 1292 | is(eval "17", $twenty_three); |
| 1293 | } |
| 1294 | |
| 1295 | { |
| 1296 | # Check readonliness of constants, whether shared hash key |
| 1297 | # scalars or no (brought up in bug #109744) |
| 1298 | BEGIN { overload::constant integer => sub { "main" }; } |
| 1299 | eval { ${\5} = 'whatever' }; |
| 1300 | like $@, qr/^Modification of a read-only value attempted at /, |
| 1301 | 'constant overloading makes read-only constants'; |
| 1302 | BEGIN { overload::constant integer => sub { __PACKAGE__ }; } |
| 1303 | eval { ${\5} = 'whatever' }; |
| 1304 | like $@, qr/^Modification of a read-only value attempted at /, |
| 1305 | '... even with shared hash key scalars'; |
| 1306 | } |
| 1307 | |
| 1308 | { |
| 1309 | package Sklorsh; |
| 1310 | use overload |
| 1311 | bool => sub { shift->is_cool }; |
| 1312 | |
| 1313 | sub is_cool { |
| 1314 | $_[0]->{name} eq 'cool'; |
| 1315 | } |
| 1316 | |
| 1317 | sub delete { |
| 1318 | undef %{$_[0]}; |
| 1319 | bless $_[0], 'Brap'; |
| 1320 | return 1; |
| 1321 | } |
| 1322 | |
| 1323 | sub delete_with_self { |
| 1324 | my $self = shift; |
| 1325 | undef %$self; |
| 1326 | bless $self, 'Brap'; |
| 1327 | return 1; |
| 1328 | } |
| 1329 | |
| 1330 | package Brap; |
| 1331 | |
| 1332 | 1; |
| 1333 | |
| 1334 | package main; |
| 1335 | |
| 1336 | my $obj; |
| 1337 | $obj = bless {name => 'cool'}, 'Sklorsh'; |
| 1338 | $obj->delete; |
| 1339 | ok(eval {if ($obj) {1}; 1}, $@ || 'reblessed into nonexistent namespace'); |
| 1340 | |
| 1341 | $obj = bless {name => 'cool'}, 'Sklorsh'; |
| 1342 | $obj->delete_with_self; |
| 1343 | ok (eval {if ($obj) {1}; 1}, $@); |
| 1344 | |
| 1345 | my $a = $b = {name => 'hot'}; |
| 1346 | bless $b, 'Sklorsh'; |
| 1347 | is(ref $a, 'Sklorsh'); |
| 1348 | is(ref $b, 'Sklorsh'); |
| 1349 | ok(!$b, "Expect overloaded boolean"); |
| 1350 | ok(!$a, "Expect overloaded boolean"); |
| 1351 | } |
| 1352 | |
| 1353 | { |
| 1354 | package Flrbbbbb; |
| 1355 | use overload |
| 1356 | bool => sub { shift->{truth} eq 'yes' }, |
| 1357 | '0+' => sub { shift->{truth} eq 'yes' ? '1' : '0' }, |
| 1358 | '!' => sub { shift->{truth} eq 'no' }, |
| 1359 | fallback => 1; |
| 1360 | |
| 1361 | sub new { my $class = shift; bless { truth => shift }, $class } |
| 1362 | |
| 1363 | package main; |
| 1364 | |
| 1365 | my $yes = Flrbbbbb->new('yes'); |
| 1366 | my $x; |
| 1367 | $x = 1 if $yes; is($x, 1); |
| 1368 | $x = 2 unless $yes; is($x, 1); |
| 1369 | $x = 3 if !$yes; is($x, 1); |
| 1370 | $x = 4 unless !$yes; is($x, 4); |
| 1371 | |
| 1372 | my $no = Flrbbbbb->new('no'); |
| 1373 | $x = 0; |
| 1374 | $x = 1 if $no; is($x, 0); |
| 1375 | $x = 2 unless $no; is($x, 2); |
| 1376 | $x = 3 if !$no; is($x, 3); |
| 1377 | $x = 4 unless !$no; is($x, 3); |
| 1378 | |
| 1379 | $x = 0; |
| 1380 | $x = 1 if !$no && $yes; is($x, 1); |
| 1381 | $x = 2 unless !$no && $yes; is($x, 1); |
| 1382 | $x = 3 if $no || !$yes; is($x, 1); |
| 1383 | $x = 4 unless $no || !$yes; is($x, 4); |
| 1384 | |
| 1385 | $x = 0; |
| 1386 | $x = 1 if !$no || !$yes; is($x, 1); |
| 1387 | $x = 2 unless !$no || !$yes; is($x, 1); |
| 1388 | $x = 3 if !$no && !$yes; is($x, 1); |
| 1389 | $x = 4 unless !$no && !$yes; is($x, 4); |
| 1390 | } |
| 1391 | |
| 1392 | { |
| 1393 | use Scalar::Util 'weaken'; |
| 1394 | |
| 1395 | package Shklitza; |
| 1396 | use overload '""' => sub {"CLiK KLAK"}; |
| 1397 | |
| 1398 | package Ksshfwoom; |
| 1399 | |
| 1400 | package main; |
| 1401 | |
| 1402 | my ($obj, $ref); |
| 1403 | $obj = bless do {my $a; \$a}, 'Shklitza'; |
| 1404 | $ref = $obj; |
| 1405 | |
| 1406 | is ("$obj", "CLiK KLAK"); |
| 1407 | is ("$ref", "CLiK KLAK"); |
| 1408 | |
| 1409 | weaken $ref; |
| 1410 | is ("$ref", "CLiK KLAK"); |
| 1411 | |
| 1412 | bless $obj, 'Ksshfwoom'; |
| 1413 | |
| 1414 | like ($obj, qr/^Ksshfwoom=/); |
| 1415 | like ($ref, qr/^Ksshfwoom=/); |
| 1416 | |
| 1417 | undef $obj; |
| 1418 | is ($ref, undef); |
| 1419 | } |
| 1420 | |
| 1421 | { |
| 1422 | package bit; |
| 1423 | # bit operations have overloadable assignment variants too |
| 1424 | |
| 1425 | sub new { bless \$_[1], $_[0] } |
| 1426 | |
| 1427 | use overload |
| 1428 | "&=" => sub { bit->new($_[0]->val . ' & ' . $_[1]->val) }, |
| 1429 | "^=" => sub { bit->new($_[0]->val . ' ^ ' . $_[1]->val) }, |
| 1430 | "|" => sub { bit->new($_[0]->val . ' | ' . $_[1]->val) }, # |= by fallback |
| 1431 | ; |
| 1432 | |
| 1433 | sub val { ${$_[0]} } |
| 1434 | |
| 1435 | package main; |
| 1436 | |
| 1437 | my $a = bit->new(my $va = 'a'); |
| 1438 | my $b = bit->new(my $vb = 'b'); |
| 1439 | |
| 1440 | $a &= $b; |
| 1441 | is($a->val, 'a & b', "overloaded &= works"); |
| 1442 | |
| 1443 | my $c = bit->new(my $vc = 'c'); |
| 1444 | |
| 1445 | $b ^= $c; |
| 1446 | is($b->val, 'b ^ c', "overloaded ^= works"); |
| 1447 | |
| 1448 | my $d = bit->new(my $vd = 'd'); |
| 1449 | |
| 1450 | $c |= $d; |
| 1451 | is($c->val, 'c | d', "overloaded |= (by fallback) works"); |
| 1452 | } |
| 1453 | |
| 1454 | { |
| 1455 | # comparison operators with nomethod (bug 41546) |
| 1456 | my $warning = ""; |
| 1457 | my $method; |
| 1458 | |
| 1459 | package nomethod_false; |
| 1460 | use overload nomethod => sub { $method = 'nomethod'; 0 }; |
| 1461 | |
| 1462 | package nomethod_true; |
| 1463 | use overload nomethod => sub { $method= 'nomethod'; 'true' }; |
| 1464 | |
| 1465 | package main; |
| 1466 | local $^W = 1; |
| 1467 | local $SIG{__WARN__} = sub { $warning = $_[0] }; |
| 1468 | |
| 1469 | my $f = bless [], 'nomethod_false'; |
| 1470 | ($warning, $method) = ("", ""); |
| 1471 | is($f eq 'whatever', 0, 'nomethod makes eq return 0'); |
| 1472 | is($method, 'nomethod'); |
| 1473 | |
| 1474 | my $t = bless [], 'nomethod_true'; |
| 1475 | ($warning, $method) = ("", ""); |
| 1476 | is($t eq 'whatever', 'true', 'nomethod makes eq return "true"'); |
| 1477 | is($method, 'nomethod'); |
| 1478 | is($warning, "", 'nomethod eq need not return number'); |
| 1479 | |
| 1480 | eval q{ |
| 1481 | package nomethod_false; |
| 1482 | use overload cmp => sub { $method = 'cmp'; 0 }; |
| 1483 | }; |
| 1484 | $f = bless [], 'nomethod_false'; |
| 1485 | ($warning, $method) = ("", ""); |
| 1486 | ok($f eq 'whatever', 'eq falls back to cmp (nomethod not called)'); |
| 1487 | is($method, 'cmp'); |
| 1488 | |
| 1489 | eval q{ |
| 1490 | package nomethod_true; |
| 1491 | use overload cmp => sub { $method = 'cmp'; 'true' }; |
| 1492 | }; |
| 1493 | $t = bless [], 'nomethod_true'; |
| 1494 | ($warning, $method) = ("", ""); |
| 1495 | ok($t eq 'whatever', 'eq falls back to cmp (nomethod not called)'); |
| 1496 | is($method, 'cmp'); |
| 1497 | like($warning, qr/isn't numeric/, 'cmp should return number'); |
| 1498 | |
| 1499 | } |
| 1500 | |
| 1501 | { |
| 1502 | # nomethod called for '!' after attempted fallback |
| 1503 | my $nomethod_called = 0; |
| 1504 | |
| 1505 | package nomethod_not; |
| 1506 | use overload nomethod => sub { $nomethod_called = 'yes'; }; |
| 1507 | |
| 1508 | package main; |
| 1509 | my $o = bless [], 'nomethod_not'; |
| 1510 | my $res = ! $o; |
| 1511 | |
| 1512 | is($nomethod_called, 'yes', "nomethod() is called for '!'"); |
| 1513 | is($res, 'yes', "nomethod(..., '!') return value propagates"); |
| 1514 | } |
| 1515 | |
| 1516 | { |
| 1517 | # Subtle bug pre 5.10, as a side effect of the overloading flag being |
| 1518 | # stored on the reference rather than the referent. Despite the fact that |
| 1519 | # objects can only be accessed via references (even internally), the |
| 1520 | # referent actually knows that it's blessed, not the references. So taking |
| 1521 | # a new, unrelated, reference to it gives an object. However, the |
| 1522 | # overloading-or-not flag was on the reference prior to 5.10, and taking |
| 1523 | # a new reference didn't (use to) copy it. |
| 1524 | |
| 1525 | package kayo; |
| 1526 | |
| 1527 | use overload '""' => sub {${$_[0]}}; |
| 1528 | |
| 1529 | sub Pie { |
| 1530 | return "$_[0], $_[1]"; |
| 1531 | } |
| 1532 | |
| 1533 | package main; |
| 1534 | |
| 1535 | my $class = 'kayo'; |
| 1536 | my $string = 'bam'; |
| 1537 | my $crunch_eth = bless \$string, $class; |
| 1538 | |
| 1539 | is("$crunch_eth", $string); |
| 1540 | is ($crunch_eth->Pie("Meat"), "$string, Meat"); |
| 1541 | |
| 1542 | my $wham_eth = \$string; |
| 1543 | |
| 1544 | is("$wham_eth", $string, |
| 1545 | 'This reference did not have overloading in 5.8.8 and earlier'); |
| 1546 | is ($crunch_eth->Pie("Apple"), "$string, Apple"); |
| 1547 | |
| 1548 | my $class = ref $wham_eth; |
| 1549 | $class =~ s/=.*//; |
| 1550 | |
| 1551 | # Bless it back into its own class! |
| 1552 | bless $wham_eth, $class; |
| 1553 | |
| 1554 | is("$wham_eth", $string); |
| 1555 | is ($crunch_eth->Pie("Blackbird"), "$string, Blackbird"); |
| 1556 | } |
| 1557 | |
| 1558 | { |
| 1559 | package numify_int; |
| 1560 | use overload "0+" => sub { $_[0][0] += 1; 42 }; |
| 1561 | package numify_self; |
| 1562 | use overload "0+" => sub { $_[0][0]++; $_[0] }; |
| 1563 | package numify_other; |
| 1564 | use overload "0+" => sub { $_[0][0]++; $_[0][1] = bless [], 'numify_int' }; |
| 1565 | package numify_by_fallback; |
| 1566 | use overload fallback => 1; |
| 1567 | |
| 1568 | package main; |
| 1569 | my $o = bless [], 'numify_int'; |
| 1570 | is(int($o), 42, 'numifies to integer'); |
| 1571 | is($o->[0], 1, 'int() numifies only once'); |
| 1572 | |
| 1573 | my $aref = []; |
| 1574 | my $num_val = int($aref); |
| 1575 | my $r = bless $aref, 'numify_self'; |
| 1576 | is(int($r), $num_val, 'numifies to self'); |
| 1577 | is($r->[0], 1, 'int() numifies once when returning self'); |
| 1578 | |
| 1579 | my $s = bless [], 'numify_other'; |
| 1580 | is(int($s), 42, 'numifies to numification of other object'); |
| 1581 | is($s->[0], 1, 'int() numifies once when returning other object'); |
| 1582 | is($s->[1][0], 1, 'returned object numifies too'); |
| 1583 | |
| 1584 | my $m = bless $aref, 'numify_by_fallback'; |
| 1585 | is(int($m), $num_val, 'numifies to usual reference value'); |
| 1586 | is(abs($m), $num_val, 'numifies to usual reference value'); |
| 1587 | is(-$m, -$num_val, 'numifies to usual reference value'); |
| 1588 | is(0+$m, $num_val, 'numifies to usual reference value'); |
| 1589 | is($m+0, $num_val, 'numifies to usual reference value'); |
| 1590 | is($m+$m, 2*$num_val, 'numifies to usual reference value'); |
| 1591 | is(0-$m, -$num_val, 'numifies to usual reference value'); |
| 1592 | is(1*$m, $num_val, 'numifies to usual reference value'); |
| 1593 | is(int($m/1), $num_val, 'numifies to usual reference value'); |
| 1594 | is($m%100, $num_val%100, 'numifies to usual reference value'); |
| 1595 | is($m**1, $num_val, 'numifies to usual reference value'); |
| 1596 | |
| 1597 | is(abs($aref), $num_val, 'abs() of ref'); |
| 1598 | is(-$aref, -$num_val, 'negative of ref'); |
| 1599 | is(0+$aref, $num_val, 'ref addition'); |
| 1600 | is($aref+0, $num_val, 'ref addition'); |
| 1601 | is($aref+$aref, 2*$num_val, 'ref addition'); |
| 1602 | is(0-$aref, -$num_val, 'subtraction of ref'); |
| 1603 | is(1*$aref, $num_val, 'multiplicaton of ref'); |
| 1604 | is(int($aref/1), $num_val, 'division of ref'); |
| 1605 | is($aref%100, $num_val%100, 'modulo of ref'); |
| 1606 | is($aref**1, $num_val, 'exponentiation of ref'); |
| 1607 | } |
| 1608 | |
| 1609 | { |
| 1610 | package CopyConstructorFallback; |
| 1611 | use overload |
| 1612 | '++' => sub { "$_[0]"; $_[0] }, |
| 1613 | fallback => 1; |
| 1614 | sub new { bless {} => shift } |
| 1615 | |
| 1616 | package main; |
| 1617 | |
| 1618 | my $o = CopyConstructorFallback->new; |
| 1619 | my $x = $o++; # would segfault |
| 1620 | my $y = ++$o; |
| 1621 | is($x, $o, "copy constructor falls back to assignment (postinc)"); |
| 1622 | is($y, $o, "copy constructor falls back to assignment (preinc)"); |
| 1623 | } |
| 1624 | |
| 1625 | # only scalar 'x' should currently overload |
| 1626 | |
| 1627 | { |
| 1628 | package REPEAT; |
| 1629 | |
| 1630 | my ($x,$n, $nm); |
| 1631 | |
| 1632 | use overload |
| 1633 | 'x' => sub { $x++; 1 }, |
| 1634 | '0+' => sub { $n++; 1 }, |
| 1635 | 'nomethod' => sub { $nm++; 1 }, |
| 1636 | 'fallback' => 0, |
| 1637 | ; |
| 1638 | |
| 1639 | my $s = bless {}; |
| 1640 | |
| 1641 | package main; |
| 1642 | |
| 1643 | my @a; |
| 1644 | my $count = 3; |
| 1645 | |
| 1646 | ($x,$n,$nm) = (0,0,0); |
| 1647 | @a = ((1,2,$s) x $count); |
| 1648 | is("$x-$n-$nm", "0-0-0", 'repeat 1'); |
| 1649 | |
| 1650 | ($x,$n,$nm) = (0,0,0); |
| 1651 | @a = ((1,$s,3) x $count); |
| 1652 | is("$x-$n-$nm", "0-0-0", 'repeat 2'); |
| 1653 | |
| 1654 | ($x,$n,$nm) = (0,0,0); |
| 1655 | @a = ((1,2,3) x $s); |
| 1656 | is("$x-$n-$nm", "0-1-0", 'repeat 3'); |
| 1657 | } |
| 1658 | |
| 1659 | |
| 1660 | |
| 1661 | # RT #57012: magic items need to have mg_get() called before testing for |
| 1662 | # overload. Lack of this means that overloaded values returned by eg a |
| 1663 | # tied array didn't call overload methods. |
| 1664 | # We test here both a tied array and scalar, since the implementation of |
| 1665 | # tied arrays (and hashes) is such that in rvalue context, mg_get is |
| 1666 | # called prior to executing the op, while it isn't for a tied scalar. |
| 1667 | # We also check that return values are correctly tainted. |
| 1668 | # We try against two overload packages; one has all expected methods, the |
| 1669 | # other uses only fallback methods. |
| 1670 | |
| 1671 | { |
| 1672 | |
| 1673 | # @tests holds a list of test cases. Each elem is an array ref with |
| 1674 | # the following entries: |
| 1675 | # |
| 1676 | # * the value that the overload method should return |
| 1677 | # |
| 1678 | # * the expression to be evaled. %s is replaced with the |
| 1679 | # variable being tested ($ta[0], $ts, or $plain) |
| 1680 | # |
| 1681 | # * a string listing what functions we expect to be called. |
| 1682 | # Each method appends its name in parentheses, so "(=)(+)" means |
| 1683 | # we expect the copy constructor and then the add method to be |
| 1684 | # called. |
| 1685 | # |
| 1686 | # * like above, but what should be called for the fallback-only test |
| 1687 | # (in this case, nomethod() identifies itself as "(NM:*)" where * |
| 1688 | # is the op). If this value is undef, fallback tests are skipped. |
| 1689 | # |
| 1690 | # * An array ref of expected counts of calls to FETCH/STORE. |
| 1691 | # The first three values are: |
| 1692 | # 1. the expected number of FETCHs for a tied array |
| 1693 | # 2. the expected number of FETCHs for a tied scalar |
| 1694 | # 3. the expected number of STOREs |
| 1695 | # If there are a further three elements present, then |
| 1696 | # these represent the expected counts for the fallback |
| 1697 | # version of the tests. If absent, they are assumed to |
| 1698 | # be the same as for the full method test |
| 1699 | # |
| 1700 | # * Under the taint version of the tests, whether we expect |
| 1701 | # the result to be tainted (for example comparison ops |
| 1702 | # like '==' don't return a tainted value, even if their |
| 1703 | # args are. |
| 1704 | my @tests; |
| 1705 | |
| 1706 | my %subs; |
| 1707 | my $funcs; |
| 1708 | my $use_int; |
| 1709 | |
| 1710 | BEGIN { |
| 1711 | # A note on what methods to expect to be called, and |
| 1712 | # how many times FETCH/STORE is called: |
| 1713 | # |
| 1714 | # Mutating ops (+=, ++ etc) trigger a copy ('='), since |
| 1715 | # the code can't distinguish between something that's been copied: |
| 1716 | # $a = foo->new(0); $b = $a; refcnt($$b) == 2 |
| 1717 | # and overloaded objects stored in ties which will have extra |
| 1718 | # refcounts due to the tied_obj magic and entries on the tmps |
| 1719 | # stack when returning from FETCH etc. So we always copy. |
| 1720 | |
| 1721 | # This accounts for a '=', and an extra STORE. |
| 1722 | # We also have a FETCH returning the final value from the eval, |
| 1723 | # plus a FETCH in the overload subs themselves: ($_[0][0]) |
| 1724 | # triggers one. However, tied aggregates have a mechanism to prevent |
| 1725 | # multiple fetches between STOREs, which means that the tied |
| 1726 | # hash skips doing a FETCH during '='. |
| 1727 | |
| 1728 | for (qw(+ - * / % ** << >> & | ^)) { |
| 1729 | my $op = $_; |
| 1730 | $op = '%%' if $op eq '%'; |
| 1731 | my $e = "%s $op= 3"; |
| 1732 | $subs{"$_="} = $e; |
| 1733 | # ARRAY FETCH: initial, sub+=, eval-return, |
| 1734 | # SCALAR FETCH: initial, sub=, sub+=, eval-return, |
| 1735 | # STORE: copy, mutator |
| 1736 | push @tests, [ 18, $e, "(=)($_=)", "(=)(NM:$_=)", [ 3, 4, 2 ], 1 ]; |
| 1737 | |
| 1738 | $subs{$_} = |
| 1739 | "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }"; |
| 1740 | # ARRAY FETCH: initial |
| 1741 | # SCALAR FETCH: initial eval-return, |
| 1742 | push @tests, [ 18, "%s $op 3", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1743 | push @tests, [ 18, "3 $op %s", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1744 | } |
| 1745 | |
| 1746 | # these use string fallback rather than nomethod |
| 1747 | for (qw(x .)) { |
| 1748 | my $op = $_; |
| 1749 | my $e = "%s $op= 3"; |
| 1750 | $subs{"$_="} = $e; |
| 1751 | # For normal case: |
| 1752 | # ARRAY FETCH: initial, sub+=, eval-return, |
| 1753 | # SCALAR FETCH: initial, sub=, sub+=, eval-return, |
| 1754 | # STORE: copy, mutator |
| 1755 | # for fallback, we just stringify, so eval-return and copy skipped |
| 1756 | |
| 1757 | push @tests, [ 18, $e, "(=)($_=)", '("")', |
| 1758 | [ 3, 4, 2, 2, 3, 1 ], 1 ]; |
| 1759 | |
| 1760 | $subs{$_} = |
| 1761 | "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }"; |
| 1762 | # ARRAY FETCH: initial |
| 1763 | # SCALAR FETCH: initial eval-return, |
| 1764 | # with fallback, we just stringify, so eval-return skipped, |
| 1765 | # but an extra FETCH happens in sub"", except for 'x', |
| 1766 | # which passes a copy of the RV to sub"", avoiding the |
| 1767 | # second FETCH |
| 1768 | |
| 1769 | push @tests, [ 18, "%s $op 3", "($_)", '("")', |
| 1770 | [ 1, 2, 0, 1, ($_ eq '.' ? 2 : 1), 0 ], 1 ]; |
| 1771 | next if $_ eq 'x'; # repeat only overloads on LHS |
| 1772 | push @tests, [ 18, "3 $op %s", "($_)", '("")', |
| 1773 | [ 1, 2, 0, 1, 2, 0 ], 1 ]; |
| 1774 | } |
| 1775 | |
| 1776 | for (qw(++ --)) { |
| 1777 | my $pre = "$_%s"; |
| 1778 | my $post = "%s$_"; |
| 1779 | $subs{$_} = $pre; |
| 1780 | push @tests, |
| 1781 | # ARRAY FETCH: initial, sub+=, eval-return, |
| 1782 | # SCALAR FETCH: initial, sub=, sub+=, eval-return, |
| 1783 | # STORE: copy, mutator |
| 1784 | [ 18, $pre, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 3, 4, 2 ], 1 ], |
| 1785 | # ARRAY FETCH: initial, sub+= |
| 1786 | # SCALAR FETCH: initial, sub=, sub+= |
| 1787 | # STORE: copy, mutator |
| 1788 | [ 18, $post, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 2, 3, 2 ], 1 ]; |
| 1789 | } |
| 1790 | |
| 1791 | # For the non-mutator ops, we have a initial FETCH, |
| 1792 | # an extra FETCH within the sub itself for the scalar option, |
| 1793 | # and no STOREs |
| 1794 | |
| 1795 | for (qw(< <= > >= == != lt le gt ge eq ne)) { |
| 1796 | my $e = "%s $_ 3"; |
| 1797 | $subs{$_} = $e; |
| 1798 | push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 0 ]; |
| 1799 | } |
| 1800 | for (qw(<=> cmp)) { |
| 1801 | my $e = "%s $_ 3"; |
| 1802 | $subs{$_} = $e; |
| 1803 | push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1804 | } |
| 1805 | for (qw(atan2)) { |
| 1806 | my $e = "$_ %s, 3"; |
| 1807 | $subs{$_} = $e; |
| 1808 | push @tests, [ 18, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1809 | } |
| 1810 | for (qw(cos sin exp abs log sqrt int ~)) { |
| 1811 | my $e = "$_(%s)"; |
| 1812 | $subs{$_} = $e; |
| 1813 | push @tests, [ 1.23, $e, "($_)", |
| 1814 | ($_ eq 'int' ? '(0+)' : "(NM:$_)") , [ 1, 2, 0 ], 1 ]; |
| 1815 | } |
| 1816 | for (qw(!)) { |
| 1817 | my $e = "$_(%s)"; |
| 1818 | $subs{$_} = $e; |
| 1819 | push @tests, [ 1.23, $e, "($_)", '(0+)', [ 1, 2, 0 ], 0 ]; |
| 1820 | } |
| 1821 | for (qw(-)) { |
| 1822 | my $e = "$_(%s)"; |
| 1823 | $subs{neg} = $e; |
| 1824 | push @tests, [ 18, $e, '(neg)', '(NM:neg)', [ 1, 2, 0 ], 1 ]; |
| 1825 | } |
| 1826 | my $e = '(%s) ? 1 : 0'; |
| 1827 | $subs{bool} = $e; |
| 1828 | push @tests, [ 18, $e, '(bool)', '(0+)', [ 1, 2, 0 ], 0 ]; |
| 1829 | |
| 1830 | # note: this is testing unary qr, not binary =~ |
| 1831 | $subs{qr} = '(qr/%s/)'; |
| 1832 | push @tests, [ "abc", '"abc" =~ (%s)', '(qr)', '("")', [ 1, 2, 0 ], 0 ]; |
| 1833 | push @tests, [ chr 256, 'chr(256) =~ (%s)', '(qr)', '("")', |
| 1834 | [ 1, 2, 0 ], 0 ]; |
| 1835 | |
| 1836 | $e = '"abc" ~~ (%s)'; |
| 1837 | $subs{'~~'} = $e; |
| 1838 | push @tests, [ "abc", $e, '(~~)', '(NM:~~)', [ 1, 1, 0 ], 0 ]; |
| 1839 | |
| 1840 | $subs{'-X'} = 'do { my $f = (%s);' |
| 1841 | . '$_[1] eq "r" ? (-r ($f)) :' |
| 1842 | . '$_[1] eq "e" ? (-e ($f)) :' |
| 1843 | . '$_[1] eq "f" ? (-f ($f)) :' |
| 1844 | . '$_[1] eq "l" ? (-l ($f)) :' |
| 1845 | . '$_[1] eq "t" ? (-t ($f)) :' |
| 1846 | . '$_[1] eq "T" ? (-T ($f)) : 0;}'; |
| 1847 | # Note - we don't care what these file tests return, as |
| 1848 | # long as the tied and untied versions return the same value. |
| 1849 | # The flags below are chosen to test all uses of tryAMAGICftest_MG |
| 1850 | for (qw(r e f l t T)) { |
| 1851 | push @tests, [ 'TEST', "-$_ (%s)", '(-X)', '("")', [ 1, 2, 0 ], 0 ]; |
| 1852 | } |
| 1853 | |
| 1854 | $subs{'${}'} = '%s'; |
| 1855 | push @tests, [ do {my $s=99; \$s}, '${%s}', '(${})', undef, [ 1, 1, 0 ], 0 ]; |
| 1856 | |
| 1857 | # we skip testing '@{}' here because too much of this test |
| 1858 | # framework involves array dereferences! |
| 1859 | |
| 1860 | $subs{'%{}'} = '%s'; |
| 1861 | push @tests, [ {qw(a 1 b 2 c 3)}, 'join "", sort keys %%{%s}', |
| 1862 | '(%{})', undef, [ 1, 1, 0 ], 0 ]; |
| 1863 | |
| 1864 | $subs{'&{}'} = '%s'; |
| 1865 | push @tests, [ sub {99}, 'do {&{%s} for 1,2}', |
| 1866 | '(&{})(&{})', undef, [ 2, 2, 0 ], 0 ]; |
| 1867 | |
| 1868 | our $RT57012A = 88; |
| 1869 | our $RT57012B; |
| 1870 | $subs{'*{}'} = '%s'; |
| 1871 | push @tests, [ \*RT57012A, '*RT57012B = *{%s}; our $RT57012B', |
| 1872 | '(*{})', undef, [ 1, 1, 0 ], 0 ]; |
| 1873 | |
| 1874 | my $iter_text = ("some random text\n" x 100) . $^X; |
| 1875 | open my $iter_fh, '<', \$iter_text |
| 1876 | or die "open of \$iter_text gave ($!)\n"; |
| 1877 | $subs{'<>'} = '<$iter_fh>'; |
| 1878 | push @tests, [ $iter_fh, '<%s>', '(<>)', undef, [ 1, 1, 0 ], 1 ]; |
| 1879 | push @tests, [ $iter_fh, |
| 1880 | 'local *CORE::GLOBAL::glob = sub {}; eval q|<%s>|', |
| 1881 | '(<>)', undef, [ 1, 1, 0 ], 1 ]; |
| 1882 | |
| 1883 | # eval should do tie, overload on its arg before checking taint */ |
| 1884 | push @tests, [ '1;', 'eval q(eval %s); $@ =~ /Insecure/', |
| 1885 | '("")', '("")', [ 1, 2, 0 ], 0 ]; |
| 1886 | |
| 1887 | |
| 1888 | for my $sub (keys %subs) { |
| 1889 | no warnings 'experimental::smartmatch'; |
| 1890 | my $term = $subs{$sub}; |
| 1891 | my $t = sprintf $term, '$_[0][0]'; |
| 1892 | my $e ="sub { \$funcs .= '($sub)'; my \$r; if (\$use_int) {" |
| 1893 | . "use integer; \$r = ($t) } else { \$r = ($t) } \$r }"; |
| 1894 | $subs{$sub} = eval $e; |
| 1895 | die "Compiling sub gave error:\n<$e>\n<$@>\n" if $@; |
| 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | my $fetches; |
| 1900 | my $stores; |
| 1901 | |
| 1902 | package RT57012_OV; |
| 1903 | |
| 1904 | use overload |
| 1905 | %subs, |
| 1906 | "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] }, |
| 1907 | '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] }, |
| 1908 | '""' => sub { $funcs .= '("")'; "$_[0][0]" }, |
| 1909 | ; |
| 1910 | |
| 1911 | package RT57012_OV_FB; # only contains fallback conversion functions |
| 1912 | |
| 1913 | use overload |
| 1914 | "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] }, |
| 1915 | '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] }, |
| 1916 | '""' => sub { $funcs .= '("")'; "$_[0][0]" }, |
| 1917 | "nomethod" => sub { |
| 1918 | $funcs .= "(NM:$_[3])"; |
| 1919 | my $e = defined($_[1]) |
| 1920 | ? $_[3] eq 'atan2' |
| 1921 | ? $_[2] |
| 1922 | ? "atan2(\$_[1],\$_[0][0])" |
| 1923 | : "atan2(\$_[0][0],\$_[1])" |
| 1924 | : $_[2] |
| 1925 | ? "\$_[1] $_[3] \$_[0][0]" |
| 1926 | : "\$_[0][0] $_[3] \$_[1]" |
| 1927 | : $_[3] eq 'neg' |
| 1928 | ? "-\$_[0][0]" |
| 1929 | : "$_[3](\$_[0][0])"; |
| 1930 | my $r; |
| 1931 | no warnings 'experimental::smartmatch'; |
| 1932 | if ($use_int) { |
| 1933 | use integer; $r = eval $e; |
| 1934 | } |
| 1935 | else { |
| 1936 | $r = eval $e; |
| 1937 | } |
| 1938 | ::diag("eval of nomethod <$e> gave <$@>") if $@; |
| 1939 | $r; |
| 1940 | } |
| 1941 | |
| 1942 | ; |
| 1943 | |
| 1944 | package RT57012_TIE_S; |
| 1945 | |
| 1946 | my $tie_val; |
| 1947 | sub TIESCALAR { bless [ bless [ $tie_val ], $_[1] ] } |
| 1948 | sub FETCH { $fetches++; $_[0][0] } |
| 1949 | sub STORE { $stores++; $_[0][0] = $_[1] } |
| 1950 | |
| 1951 | package RT57012_TIE_A; |
| 1952 | |
| 1953 | sub TIEARRAY { bless [] } |
| 1954 | sub FETCH { $fetches++; $_[0][0] } |
| 1955 | sub STORE { $stores++; $_[0][$_[1]] = $_[2] } |
| 1956 | |
| 1957 | package main; |
| 1958 | |
| 1959 | for my $test (@tests) { |
| 1960 | my ($val, $sub_term, $exp_funcs, $exp_fb_funcs, |
| 1961 | $exp_counts, $exp_taint) = @$test; |
| 1962 | |
| 1963 | my $tainted_val; |
| 1964 | { |
| 1965 | # create tainted version of $val (unless its a ref) |
| 1966 | my $t = substr($^X,0,0); |
| 1967 | my $t0 = $t."0"; |
| 1968 | my $val1 = $val; # use a copy to avoid stringifying original |
| 1969 | $tainted_val = ref($val1) ? $val : |
| 1970 | ($val1 =~ /^[\d\.]+$/) ? $val+$t0 : $val.$t; |
| 1971 | } |
| 1972 | $tie_val = $tainted_val; |
| 1973 | |
| 1974 | for my $int ('', 'use integer; ') { |
| 1975 | $use_int = ($int ne ''); |
| 1976 | my $plain = $tainted_val; |
| 1977 | my $plain_term = $int . sprintf $sub_term, '$plain'; |
| 1978 | my $exp = do {no warnings 'experimental::smartmatch'; eval $plain_term }; |
| 1979 | diag("eval of plain_term <$plain_term> gave <$@>") if $@; |
| 1980 | is(tainted($exp), $exp_taint, |
| 1981 | "<$plain_term> taint of expected return"); |
| 1982 | |
| 1983 | for my $ov_pkg (qw(RT57012_OV RT57012_OV_FB)) { |
| 1984 | next if $ov_pkg eq 'RT57012_OV_FB' |
| 1985 | and not defined $exp_fb_funcs; |
| 1986 | my ($exp_fetch_a, $exp_fetch_s, $exp_store) = |
| 1987 | ($ov_pkg eq 'RT57012_OV' || @$exp_counts < 4) |
| 1988 | ? @$exp_counts[0,1,2] |
| 1989 | : @$exp_counts[3,4,5]; |
| 1990 | |
| 1991 | tie my $ts, 'RT57012_TIE_S', $ov_pkg; |
| 1992 | tie my @ta, 'RT57012_TIE_A'; |
| 1993 | $ta[0] = bless [ $tainted_val ], $ov_pkg; |
| 1994 | my $oload = bless [ $tainted_val ], $ov_pkg; |
| 1995 | |
| 1996 | for my $var ('$ta[0]', '$ts', '$oload', |
| 1997 | ($sub_term eq '<%s>' ? '${ts}' : ()) |
| 1998 | ) { |
| 1999 | |
| 2000 | $funcs = ''; |
| 2001 | $fetches = 0; |
| 2002 | $stores = 0; |
| 2003 | |
| 2004 | my $res_term = $int . sprintf $sub_term, $var; |
| 2005 | my $desc = "<$res_term> $ov_pkg" ; |
| 2006 | my $res = do { no warnings 'experimental::smartmatch'; eval $res_term }; |
| 2007 | diag("eval of res_term $desc gave <$@>") if $@; |
| 2008 | # uniquely, the inc/dec ops return the original |
| 2009 | # ref rather than a copy, so stringify it to |
| 2010 | # find out if its tainted |
| 2011 | $res = "$res" if $res_term =~ /\+\+|--/; |
| 2012 | is(tainted($res), $exp_taint, |
| 2013 | "$desc taint of result return"); |
| 2014 | is($res, $exp, "$desc return value"); |
| 2015 | my $fns =($ov_pkg eq 'RT57012_OV_FB') |
| 2016 | ? $exp_fb_funcs : $exp_funcs; |
| 2017 | if ($var eq '$oload' && $res_term !~ /oload(\+\+|--)/) { |
| 2018 | # non-tied overloading doesn't trigger a copy |
| 2019 | # except for post inc/dec |
| 2020 | $fns =~ s/^\(=\)//; |
| 2021 | } |
| 2022 | is($funcs, $fns, "$desc methods called"); |
| 2023 | next if $var eq '$oload'; |
| 2024 | my $exp_fetch = ($var eq '$ts') ? |
| 2025 | $exp_fetch_s : $exp_fetch_a; |
| 2026 | is($fetches, $exp_fetch, "$desc FETCH count"); |
| 2027 | is($stores, $exp_store, "$desc STORE count"); |
| 2028 | |
| 2029 | } |
| 2030 | |
| 2031 | } |
| 2032 | } |
| 2033 | } |
| 2034 | } |
| 2035 | |
| 2036 | # Test overload from the main package |
| 2037 | fresh_perl_is |
| 2038 | '$^W = 1; use overload q\""\ => sub {"ning"}; print bless []', |
| 2039 | 'ning', |
| 2040 | { switches => ['-wl'], stderr => 1 }, |
| 2041 | 'use overload from the main package' |
| 2042 | ; |
| 2043 | |
| 2044 | { |
| 2045 | package blessed_methods; |
| 2046 | use overload '+' => sub {}; |
| 2047 | bless overload::Method __PACKAGE__,'+'; |
| 2048 | eval { overload::Method __PACKAGE__,'+' }; |
| 2049 | ::is($@, '', 'overload::Method and blessed overload methods'); |
| 2050 | } |
| 2051 | |
| 2052 | { |
| 2053 | # fallback to 'cmp' and '<=>' with heterogeneous operands |
| 2054 | # [perl #71286] |
| 2055 | my $not_found = 'no method found'; |
| 2056 | my $used = 0; |
| 2057 | package CmpBase; |
| 2058 | sub new { |
| 2059 | my $n = $_[1] || 0; |
| 2060 | bless \$n, ref $_[0] || $_[0]; |
| 2061 | } |
| 2062 | sub cmp { |
| 2063 | $used = \$_[0]; |
| 2064 | (${$_[0]} <=> ${$_[1]}) * ($_[2] ? -1 : 1); |
| 2065 | } |
| 2066 | |
| 2067 | package NCmp; |
| 2068 | use parent '-norequire', 'CmpBase'; |
| 2069 | use overload '<=>' => 'cmp'; |
| 2070 | |
| 2071 | package SCmp; |
| 2072 | use parent '-norequire', 'CmpBase'; |
| 2073 | use overload 'cmp' => 'cmp'; |
| 2074 | |
| 2075 | package main; |
| 2076 | my $n = NCmp->new(5); |
| 2077 | my $s = SCmp->new(3); |
| 2078 | my $res; |
| 2079 | |
| 2080 | eval { $res = $n > $s; }; |
| 2081 | $res = $not_found if $@ =~ /$not_found/; |
| 2082 | is($res, 1, 'A>B using A<=> when B overloaded, no B<=>'); |
| 2083 | |
| 2084 | eval { $res = $s < $n; }; |
| 2085 | $res = $not_found if $@ =~ /$not_found/; |
| 2086 | is($res, 1, 'A<B using B<=> when A overloaded, no A<=>'); |
| 2087 | |
| 2088 | eval { $res = $s lt $n; }; |
| 2089 | $res = $not_found if $@ =~ /$not_found/; |
| 2090 | is($res, 1, 'A lt B using A:cmp when B overloaded, no B:cmp'); |
| 2091 | |
| 2092 | eval { $res = $n gt $s; }; |
| 2093 | $res = $not_found if $@ =~ /$not_found/; |
| 2094 | is($res, 1, 'A gt B using B:cmp when A overloaded, no A:cmp'); |
| 2095 | |
| 2096 | my $o = NCmp->new(9); |
| 2097 | $res = $n < $o; |
| 2098 | is($used, \$n, 'A < B uses <=> from A in preference to B'); |
| 2099 | |
| 2100 | my $t = SCmp->new(7); |
| 2101 | $res = $s lt $t; |
| 2102 | is($used, \$s, 'A lt B uses cmp from A in preference to B'); |
| 2103 | } |
| 2104 | |
| 2105 | { |
| 2106 | # Combinatorial testing of 'fallback' and 'nomethod' |
| 2107 | # [perl #71286] |
| 2108 | package NuMB; |
| 2109 | use overload '0+' => sub { ${$_[0]}; }, |
| 2110 | '""' => 'str'; |
| 2111 | sub new { |
| 2112 | my $self = shift; |
| 2113 | my $n = @_ ? shift : 0; |
| 2114 | bless my $obj = \$n, ref $self || $self; |
| 2115 | } |
| 2116 | sub str { |
| 2117 | no strict qw/refs/; |
| 2118 | my $s = "(${$_[0]} "; |
| 2119 | $s .= "nomethod, " if defined ${ref($_[0]).'::(nomethod'}; |
| 2120 | my $fb = ${ref($_[0]).'::()'}; |
| 2121 | $s .= "fb=" . (defined $fb ? 0 + $fb : 'undef') . ")"; |
| 2122 | } |
| 2123 | sub nomethod { "${$_[0]}.nomethod"; } |
| 2124 | |
| 2125 | # create classes for tests |
| 2126 | package main; |
| 2127 | my @falls = (0, 'undef', 1); |
| 2128 | my @nomethods = ('', 'nomethod'); |
| 2129 | my $not_found = 'no method found'; |
| 2130 | for my $fall (@falls) { |
| 2131 | for my $nomethod (@nomethods) { |
| 2132 | my $nomethod_decl = $nomethod |
| 2133 | ? $nomethod . "=>'nomethod'," : ''; |
| 2134 | eval qq{ |
| 2135 | package NuMB$fall$nomethod; |
| 2136 | use parent '-norequire', qw/NuMB/; |
| 2137 | use overload $nomethod_decl |
| 2138 | fallback => $fall; |
| 2139 | }; |
| 2140 | } |
| 2141 | } |
| 2142 | |
| 2143 | # operation and precedence of 'fallback' and 'nomethod' |
| 2144 | # for all combinations with 2 overloaded operands |
| 2145 | for my $nomethod2 (@nomethods) { |
| 2146 | for my $nomethod1 (@nomethods) { |
| 2147 | for my $fall2 (@falls) { |
| 2148 | my $pack2 = "NuMB$fall2$nomethod2"; |
| 2149 | for my $fall1 (@falls) { |
| 2150 | my $pack1 = "NuMB$fall1$nomethod1"; |
| 2151 | my ($test, $out, $exp); |
| 2152 | eval qq{ |
| 2153 | my \$x = $pack1->new(2); |
| 2154 | my \$y = $pack2->new(3); |
| 2155 | \$test = "\$x" . ' * ' . "\$y"; |
| 2156 | \$out = \$x * \$y; |
| 2157 | }; |
| 2158 | $out = $not_found if $@ =~ /$not_found/; |
| 2159 | $exp = $nomethod1 ? '2.nomethod' : |
| 2160 | $nomethod2 ? '3.nomethod' : |
| 2161 | $fall1 eq '1' && $fall2 eq '1' ? 6 |
| 2162 | : $not_found; |
| 2163 | is($out, $exp, "$test --> $exp"); |
| 2164 | } |
| 2165 | } |
| 2166 | } |
| 2167 | } |
| 2168 | |
| 2169 | # operation of 'fallback' and 'nomethod' |
| 2170 | # where the other operand is not overloaded |
| 2171 | for my $nomethod (@nomethods) { |
| 2172 | for my $fall (@falls) { |
| 2173 | my ($test, $out, $exp); |
| 2174 | eval qq{ |
| 2175 | my \$x = NuMB$fall$nomethod->new(2); |
| 2176 | \$test = "\$x" . ' * 3'; |
| 2177 | \$out = \$x * 3; |
| 2178 | }; |
| 2179 | $out = $not_found if $@ =~ /$not_found/; |
| 2180 | $exp = $nomethod ? '2.nomethod' : |
| 2181 | $fall eq '1' ? 6 |
| 2182 | : $not_found; |
| 2183 | is($out, $exp, "$test --> $exp"); |
| 2184 | |
| 2185 | eval qq{ |
| 2186 | my \$x = NuMB$fall$nomethod->new(2); |
| 2187 | \$test = '3 * ' . "\$x"; |
| 2188 | \$out = 3 * \$x; |
| 2189 | }; |
| 2190 | $out = $not_found if $@ =~ /$not_found/; |
| 2191 | is($out, $exp, "$test --> $exp"); |
| 2192 | } |
| 2193 | } |
| 2194 | } |
| 2195 | |
| 2196 | # since 5.6 overloaded <> was leaving an extra arg on the stack! |
| 2197 | |
| 2198 | { |
| 2199 | package Iter1; |
| 2200 | use overload '<>' => sub { 11 }; |
| 2201 | package main; |
| 2202 | my $a = bless [], 'Iter1'; |
| 2203 | my $x; |
| 2204 | my @a = (10, ($x = <$a>), 12); |
| 2205 | is ($a[0], 10, 'Iter1: a[0]'); |
| 2206 | is ($a[1], 11, 'Iter1: a[1]'); |
| 2207 | is ($a[2], 12, 'Iter1: a[2]'); |
| 2208 | @a = (10, ($x .= <$a>), 12); |
| 2209 | is ($a[0], 10, 'Iter1: a[0] concat'); |
| 2210 | is ($a[1], 1111, 'Iter1: a[1] concat'); |
| 2211 | is ($a[2], 12, 'Iter1: a[2] concat'); |
| 2212 | } |
| 2213 | |
| 2214 | # Some tests for error messages |
| 2215 | { |
| 2216 | package Justus; |
| 2217 | use overload '+' => 'justice'; |
| 2218 | eval {"".bless[]}; |
| 2219 | ::like $@, qr/^Can't resolve method "justice" overloading "\+" in p(?x: |
| 2220 | )ackage "Justus" at /, |
| 2221 | 'Error message when explicitly named overload method does not exist'; |
| 2222 | |
| 2223 | package JustUs; |
| 2224 | our @ISA = 'JustYou'; |
| 2225 | package JustYou { use overload '+' => 'injustice'; } |
| 2226 | "JustUs"->${\"(+"}; |
| 2227 | eval {"".bless []}; |
| 2228 | ::like $@, qr/^Stub found while resolving method "\?{3}" overloadin(?x: |
| 2229 | )g "\+" in package "JustUs" at /, |
| 2230 | 'Error message when sub stub is encountered'; |
| 2231 | } |
| 2232 | |
| 2233 | { |
| 2234 | # check that the right number of stringifications |
| 2235 | # and the correct un-utf8-ifying happen on regex compile |
| 2236 | package utf8_match; |
| 2237 | my $c; |
| 2238 | use overload '""' => sub { $c++; $_[0][0] ? "^\x{100}\$" : "^A\$"; }; |
| 2239 | my $o = bless [0], 'utf8_match'; |
| 2240 | |
| 2241 | $o->[0] = 0; |
| 2242 | $c = 0; |
| 2243 | ::ok("A" =~ "^A\$", "regex stringify utf8=0 ol=0 bytes=0"); |
| 2244 | ::ok("A" =~ $o, "regex stringify utf8=0 ol=1 bytes=0"); |
| 2245 | ::is($c, 1, "regex stringify utf8=0 ol=1 bytes=0 count"); |
| 2246 | |
| 2247 | $o->[0] = 1; |
| 2248 | $c = 0; |
| 2249 | ::ok("\x{100}" =~ "^\x{100}\$", |
| 2250 | "regex stringify utf8=1 ol=0 bytes=0"); |
| 2251 | ::ok("\x{100}" =~ $o, "regex stringify utf8=1 ol=1 bytes=0"); |
| 2252 | ::is($c, 1, "regex stringify utf8=1 ol=1 bytes=0 count"); |
| 2253 | |
| 2254 | use bytes; |
| 2255 | |
| 2256 | $o->[0] = 0; |
| 2257 | $c = 0; |
| 2258 | ::ok("A" =~ "^A\$", "regex stringify utf8=0 ol=0 bytes=1"); |
| 2259 | ::ok("A" =~ $o, "regex stringify utf8=0 ol=1 bytes=1"); |
| 2260 | ::is($c, 1, "regex stringify utf8=0 ol=1 bytes=1 count"); |
| 2261 | |
| 2262 | $o->[0] = 1; |
| 2263 | $c = 0; |
| 2264 | ::ok("\xc4\x80" =~ "^\x{100}\$", |
| 2265 | "regex stringify utf8=1 ol=0 bytes=1"); |
| 2266 | ::ok("\xc4\x80" =~ $o, "regex stringify utf8=1 ol=1 bytes=1"); |
| 2267 | ::is($c, 1, "regex stringify utf8=1 ol=1 bytes=1 count"); |
| 2268 | |
| 2269 | |
| 2270 | } |
| 2271 | |
| 2272 | # [perl #40333] |
| 2273 | # overload::Overloaded should not use a ->can designed for autoloading. |
| 2274 | # This example attempts to be as realistic as possible. The o class has a |
| 2275 | # default singleton object, but can have instances, too. The proxy class |
| 2276 | # represents proxies for o objects, but class methods delegate to the |
| 2277 | # singleton. |
| 2278 | # overload::Overloaded used to return incorrect results for proxy objects. |
| 2279 | package proxy { |
| 2280 | sub new { bless [$_[1]], $_[0] } |
| 2281 | sub AUTOLOAD { |
| 2282 | our $AUTOLOAD =~ s/.*:://; |
| 2283 | &_self->$AUTOLOAD; |
| 2284 | } |
| 2285 | sub can { SUPER::can{@_} || &_self->can($_[1]) } |
| 2286 | sub _self { ref $_[0] ? $_[0][0] : $o::singleton } |
| 2287 | } |
| 2288 | package o { use overload '""' => sub { 'keck' }; |
| 2289 | sub new { bless[], $_[0] } |
| 2290 | our $singleton = o->new; } |
| 2291 | ok !overload::Overloaded(new proxy new o), |
| 2292 | 'overload::Overloaded does not incorrectly return true for proxy classes'; |
| 2293 | |
| 2294 | # Another test, based on the type of explosive test class for which |
| 2295 | # perl #40333 was filed. |
| 2296 | { |
| 2297 | package broken_can; |
| 2298 | sub can {} |
| 2299 | use overload '""' => sub {"Ahoy!"}; |
| 2300 | |
| 2301 | package main; |
| 2302 | my $obj = bless [], 'broken_can'; |
| 2303 | ok(overload::Overloaded($obj)); |
| 2304 | } |
| 2305 | |
| 2306 | sub eleventative::cos { 'eleven' } |
| 2307 | sub twelvetative::abs { 'twelve' } |
| 2308 | sub thirteentative::abs { 'thirteen' } |
| 2309 | sub fourteentative::abs { 'fourteen' } |
| 2310 | @eleventative::ISA = twelvetative::; |
| 2311 | { |
| 2312 | my $o = bless [], 'eleventative'; |
| 2313 | eval 'package eleventative; use overload map +($_)x2, cos=>abs=>'; |
| 2314 | is cos $o, 'eleven', 'overloading applies to object blessed before'; |
| 2315 | bless [], 'eleventative'; |
| 2316 | is cos $o, 'eleven', |
| 2317 | 'ovrld applies to previously-blessed obj after other obj is blessed'; |
| 2318 | $o = bless [], 'eleventative'; |
| 2319 | *eleventative::cos = sub { 'ten' }; |
| 2320 | is cos $o, 'ten', 'method changes affect overloading'; |
| 2321 | @eleventative::ISA = thirteentative::; |
| 2322 | is abs $o, 'thirteen', 'isa changes affect overloading'; |
| 2323 | bless $o, 'fourteentative'; |
| 2324 | @fourteentative::ISA = 'eleventative'; |
| 2325 | is abs $o, 'fourteen', 'isa changes can turn overloading on'; |
| 2326 | } |
| 2327 | |
| 2328 | # no overload "fallback"; |
| 2329 | { package phake; |
| 2330 | use overload fallback => 1, '""' => sub { 'arakas' }; |
| 2331 | no overload 'fallback'; |
| 2332 | } |
| 2333 | $a = bless [], 'phake'; |
| 2334 | is "$a", "arakas", |
| 2335 | 'no overload "fallback" does not stop overload from working'; |
| 2336 | ok !eval { () = $a eq 'mpizeli'; 1 }, |
| 2337 | 'no overload "fallback" resets fallback to undef on overloaded class'; |
| 2338 | { package ent; use overload fallback => 0, abs => sub{}; |
| 2339 | our@ISA = 'huorn'; |
| 2340 | package huorn; |
| 2341 | use overload fallback => 1; |
| 2342 | package ent; |
| 2343 | no overload "fallback"; # disable previous declaration |
| 2344 | } |
| 2345 | $a = bless [], ent::; |
| 2346 | is eval {"$a"}, overload::StrVal($a), |
| 2347 | 'no overload undoes fallback declaration completetly' |
| 2348 | or diag $@; |
| 2349 | |
| 2350 | # inherited fallback |
| 2351 | { |
| 2352 | package pervyy; |
| 2353 | our @ISA = 'vtoryy'; |
| 2354 | use overload "abs" =>=> sub {}; |
| 2355 | package vtoryy; |
| 2356 | use overload fallback => 1, 'sin' =>=> sub{} |
| 2357 | } |
| 2358 | $a = bless [], pervyy::; |
| 2359 | is eval {"$a"}, overload::StrVal($a), |
| 2360 | 'fallback is inherited by classes that have their own overloading' |
| 2361 | or diag $@; |
| 2362 | |
| 2363 | # package separators in method names |
| 2364 | { |
| 2365 | package mane; |
| 2366 | use overload q\""\ => "bear::strength"; |
| 2367 | use overload bool => "bear'bouillon"; |
| 2368 | } |
| 2369 | @bear::ISA = 'food'; |
| 2370 | sub food::strength { 'twine' } |
| 2371 | sub food::bouillon { 0 } |
| 2372 | $a = bless[], mane::; |
| 2373 | is eval { "$a" }, 'twine', ':: in method name' or diag $@; |
| 2374 | is eval { !$a }, 1, "' in method name" or diag $@; |
| 2375 | |
| 2376 | # [perl #113050] Half of CPAN assumes fallback is under "()" |
| 2377 | { |
| 2378 | package dodo; |
| 2379 | use overload '+' => sub {}; |
| 2380 | no strict; |
| 2381 | *{"dodo::()"} = sub{}; |
| 2382 | ${"dodo::()"} = 1; |
| 2383 | } |
| 2384 | $a = bless [],'dodo'; |
| 2385 | is eval {"$a"}, overload::StrVal($a), 'fallback is stored under "()"'; |
| 2386 | |
| 2387 | # [perl #47119] |
| 2388 | { |
| 2389 | my $context; |
| 2390 | |
| 2391 | { |
| 2392 | package Splitter; |
| 2393 | use overload '<>' => \&chars; |
| 2394 | |
| 2395 | sub new { |
| 2396 | my $class = shift; |
| 2397 | my ($string) = @_; |
| 2398 | bless \$string, $class; |
| 2399 | } |
| 2400 | |
| 2401 | sub chars { |
| 2402 | my $self = shift; |
| 2403 | my @chars = split //, $$self; |
| 2404 | $context = wantarray; |
| 2405 | return @chars; |
| 2406 | } |
| 2407 | } |
| 2408 | |
| 2409 | my $obj = Splitter->new('bar'); |
| 2410 | |
| 2411 | $context = 42; # not 1, '', or undef |
| 2412 | |
| 2413 | my @foo = <$obj>; |
| 2414 | is($context, 1, "list context (readline list)"); |
| 2415 | is(scalar(@foo), 3, "correct result (readline list)"); |
| 2416 | is($foo[0], 'b', "correct result (readline list)"); |
| 2417 | is($foo[1], 'a', "correct result (readline list)"); |
| 2418 | is($foo[2], 'r', "correct result (readline list)"); |
| 2419 | |
| 2420 | $context = 42; |
| 2421 | |
| 2422 | my $foo = <$obj>; |
| 2423 | ok(defined($context), "scalar context (readline scalar)"); |
| 2424 | is($context, '', "scalar context (readline scalar)"); |
| 2425 | is($foo, 3, "correct result (readline scalar)"); |
| 2426 | |
| 2427 | $context = 42; |
| 2428 | |
| 2429 | <$obj>; |
| 2430 | ok(!defined($context), "void context (readline void)"); |
| 2431 | |
| 2432 | $context = 42; |
| 2433 | |
| 2434 | my @bar = <${obj}>; |
| 2435 | is($context, 1, "list context (glob list)"); |
| 2436 | is(scalar(@bar), 3, "correct result (glob list)"); |
| 2437 | is($bar[0], 'b', "correct result (glob list)"); |
| 2438 | is($bar[1], 'a', "correct result (glob list)"); |
| 2439 | is($bar[2], 'r', "correct result (glob list)"); |
| 2440 | |
| 2441 | $context = 42; |
| 2442 | |
| 2443 | my $bar = <${obj}>; |
| 2444 | ok(defined($context), "scalar context (glob scalar)"); |
| 2445 | is($context, '', "scalar context (glob scalar)"); |
| 2446 | is($bar, 3, "correct result (glob scalar)"); |
| 2447 | |
| 2448 | $context = 42; |
| 2449 | |
| 2450 | <${obj}>; |
| 2451 | ok(!defined($context), "void context (glob void)"); |
| 2452 | } |
| 2453 | { |
| 2454 | my $context; |
| 2455 | |
| 2456 | { |
| 2457 | package StringWithContext; |
| 2458 | use overload '""' => \&stringify; |
| 2459 | |
| 2460 | sub new { |
| 2461 | my $class = shift; |
| 2462 | my ($string) = @_; |
| 2463 | bless \$string, $class; |
| 2464 | } |
| 2465 | |
| 2466 | sub stringify { |
| 2467 | my $self = shift; |
| 2468 | $context = wantarray; |
| 2469 | return $$self; |
| 2470 | } |
| 2471 | } |
| 2472 | |
| 2473 | my $obj = StringWithContext->new('bar'); |
| 2474 | |
| 2475 | $context = 42; |
| 2476 | |
| 2477 | my @foo = "".$obj; |
| 2478 | ok(defined($context), "scalar context (stringify list)"); |
| 2479 | is($context, '', "scalar context (stringify list)"); |
| 2480 | is(scalar(@foo), 1, "correct result (stringify list)"); |
| 2481 | is($foo[0], 'bar', "correct result (stringify list)"); |
| 2482 | |
| 2483 | $context = 42; |
| 2484 | |
| 2485 | my $foo = "".$obj; |
| 2486 | ok(defined($context), "scalar context (stringify scalar)"); |
| 2487 | is($context, '', "scalar context (stringify scalar)"); |
| 2488 | is($foo, 'bar', "correct result (stringify scalar)"); |
| 2489 | |
| 2490 | $context = 42; |
| 2491 | |
| 2492 | "".$obj; |
| 2493 | |
| 2494 | is($context, '', "scalar context (stringify void)"); |
| 2495 | } |
| 2496 | { |
| 2497 | my ($context, $swap); |
| 2498 | |
| 2499 | { |
| 2500 | package AddWithContext; |
| 2501 | use overload '+' => \&add; |
| 2502 | |
| 2503 | sub new { |
| 2504 | my $class = shift; |
| 2505 | my ($num) = @_; |
| 2506 | bless \$num, $class; |
| 2507 | } |
| 2508 | |
| 2509 | sub add { |
| 2510 | my $self = shift; |
| 2511 | my ($other, $swapped) = @_; |
| 2512 | $context = wantarray; |
| 2513 | $swap = $swapped; |
| 2514 | return ref($self)->new($$self + $other); |
| 2515 | } |
| 2516 | |
| 2517 | sub val { ${ $_[0] } } |
| 2518 | } |
| 2519 | |
| 2520 | my $obj = AddWithContext->new(6); |
| 2521 | |
| 2522 | $context = $swap = 42; |
| 2523 | |
| 2524 | my @foo = $obj + 7; |
| 2525 | ok(defined($context), "scalar context (add list)"); |
| 2526 | is($context, '', "scalar context (add list)"); |
| 2527 | ok(defined($swap), "not swapped (add list)"); |
| 2528 | is($swap, '', "not swapped (add list)"); |
| 2529 | is(scalar(@foo), 1, "correct result (add list)"); |
| 2530 | is($foo[0]->val, 13, "correct result (add list)"); |
| 2531 | |
| 2532 | $context = $swap = 42; |
| 2533 | |
| 2534 | @foo = 7 + $obj; |
| 2535 | ok(defined($context), "scalar context (add list swap)"); |
| 2536 | is($context, '', "scalar context (add list swap)"); |
| 2537 | ok(defined($swap), "swapped (add list swap)"); |
| 2538 | is($swap, 1, "swapped (add list swap)"); |
| 2539 | is(scalar(@foo), 1, "correct result (add list swap)"); |
| 2540 | is($foo[0]->val, 13, "correct result (add list swap)"); |
| 2541 | |
| 2542 | $context = $swap = 42; |
| 2543 | |
| 2544 | my $foo = $obj + 7; |
| 2545 | ok(defined($context), "scalar context (add scalar)"); |
| 2546 | is($context, '', "scalar context (add scalar)"); |
| 2547 | ok(defined($swap), "not swapped (add scalar)"); |
| 2548 | is($swap, '', "not swapped (add scalar)"); |
| 2549 | is($foo->val, 13, "correct result (add scalar)"); |
| 2550 | |
| 2551 | $context = $swap = 42; |
| 2552 | |
| 2553 | my $foo = 7 + $obj; |
| 2554 | ok(defined($context), "scalar context (add scalar swap)"); |
| 2555 | is($context, '', "scalar context (add scalar swap)"); |
| 2556 | ok(defined($swap), "swapped (add scalar swap)"); |
| 2557 | is($swap, 1, "swapped (add scalar swap)"); |
| 2558 | is($foo->val, 13, "correct result (add scalar swap)"); |
| 2559 | |
| 2560 | $context = $swap = 42; |
| 2561 | |
| 2562 | $obj + 7; |
| 2563 | |
| 2564 | ok(!defined($context), "void context (add void)"); |
| 2565 | ok(defined($swap), "not swapped (add void)"); |
| 2566 | is($swap, '', "not swapped (add void)"); |
| 2567 | |
| 2568 | $context = $swap = 42; |
| 2569 | |
| 2570 | 7 + $obj; |
| 2571 | |
| 2572 | ok(!defined($context), "void context (add void swap)"); |
| 2573 | ok(defined($swap), "swapped (add void swap)"); |
| 2574 | is($swap, 1, "swapped (add void swap)"); |
| 2575 | |
| 2576 | $obj = AddWithContext->new(6); |
| 2577 | |
| 2578 | $context = $swap = 42; |
| 2579 | |
| 2580 | my @foo = $obj += 7; |
| 2581 | ok(defined($context), "scalar context (add assign list)"); |
| 2582 | is($context, '', "scalar context (add assign list)"); |
| 2583 | ok(!defined($swap), "not swapped and autogenerated (add assign list)"); |
| 2584 | is(scalar(@foo), 1, "correct result (add assign list)"); |
| 2585 | is($foo[0]->val, 13, "correct result (add assign list)"); |
| 2586 | is($obj->val, 13, "correct result (add assign list)"); |
| 2587 | |
| 2588 | $obj = AddWithContext->new(6); |
| 2589 | |
| 2590 | $context = $swap = 42; |
| 2591 | |
| 2592 | my $foo = $obj += 7; |
| 2593 | ok(defined($context), "scalar context (add assign scalar)"); |
| 2594 | is($context, '', "scalar context (add assign scalar)"); |
| 2595 | ok(!defined($swap), "not swapped and autogenerated (add assign scalar)"); |
| 2596 | is($foo->val, 13, "correct result (add assign scalar)"); |
| 2597 | is($obj->val, 13, "correct result (add assign scalar)"); |
| 2598 | |
| 2599 | $obj = AddWithContext->new(6); |
| 2600 | |
| 2601 | $context = $swap = 42; |
| 2602 | |
| 2603 | $obj += 7; |
| 2604 | |
| 2605 | ok(defined($context), "scalar context (add assign void)"); |
| 2606 | is($context, '', "scalar context (add assign void)"); |
| 2607 | ok(!defined($swap), "not swapped and autogenerated (add assign void)"); |
| 2608 | is($obj->val, 13, "correct result (add assign void)"); |
| 2609 | |
| 2610 | $obj = AddWithContext->new(6); |
| 2611 | |
| 2612 | $context = $swap = 42; |
| 2613 | |
| 2614 | my @foo = ++$obj; |
| 2615 | ok(defined($context), "scalar context (add incr list)"); |
| 2616 | is($context, '', "scalar context (add incr list)"); |
| 2617 | ok(!defined($swap), "not swapped and autogenerated (add incr list)"); |
| 2618 | is(scalar(@foo), 1, "correct result (add incr list)"); |
| 2619 | is($foo[0]->val, 7, "correct result (add incr list)"); |
| 2620 | is($obj->val, 7, "correct result (add incr list)"); |
| 2621 | |
| 2622 | $obj = AddWithContext->new(6); |
| 2623 | |
| 2624 | $context = $swap = 42; |
| 2625 | |
| 2626 | my $foo = ++$obj; |
| 2627 | ok(defined($context), "scalar context (add incr scalar)"); |
| 2628 | is($context, '', "scalar context (add incr scalar)"); |
| 2629 | ok(!defined($swap), "not swapped and autogenerated (add incr scalar)"); |
| 2630 | is($foo->val, 7, "correct result (add incr scalar)"); |
| 2631 | is($obj->val, 7, "correct result (add incr scalar)"); |
| 2632 | |
| 2633 | $obj = AddWithContext->new(6); |
| 2634 | |
| 2635 | $context = $swap = 42; |
| 2636 | |
| 2637 | ++$obj; |
| 2638 | |
| 2639 | ok(defined($context), "scalar context (add incr void)"); |
| 2640 | is($context, '', "scalar context (add incr void)"); |
| 2641 | ok(!defined($swap), "not swapped and autogenerated (add incr void)"); |
| 2642 | is($obj->val, 7, "correct result (add incr void)"); |
| 2643 | } |
| 2644 | |
| 2645 | # [perl #113010] |
| 2646 | { |
| 2647 | { |
| 2648 | package OnlyFallback; |
| 2649 | use overload fallback => 0; |
| 2650 | } |
| 2651 | { |
| 2652 | my $obj = bless {}, 'OnlyFallback'; |
| 2653 | my $died = !eval { "".$obj; 1 }; |
| 2654 | my $err = $@; |
| 2655 | ok($died, "fallback of 0 causes error"); |
| 2656 | like($err, qr/"\.": no method found/, "correct error"); |
| 2657 | } |
| 2658 | |
| 2659 | { |
| 2660 | package OnlyFallbackUndef; |
| 2661 | use overload fallback => undef; |
| 2662 | } |
| 2663 | { |
| 2664 | my $obj = bless {}, 'OnlyFallbackUndef'; |
| 2665 | my $died = !eval { "".$obj; 1 }; |
| 2666 | my $err = $@; |
| 2667 | ok($died, "fallback of undef causes error"); |
| 2668 | # this one tries falling back to stringify before dying |
| 2669 | like($err, qr/"""": no method found/, "correct error"); |
| 2670 | } |
| 2671 | |
| 2672 | { |
| 2673 | package OnlyFallbackTrue; |
| 2674 | use overload fallback => 1; |
| 2675 | } |
| 2676 | { |
| 2677 | my $obj = bless {}, 'OnlyFallbackTrue'; |
| 2678 | my $val; |
| 2679 | my $died = !eval { $val = "".$obj; 1 }; |
| 2680 | my $err = $@; |
| 2681 | ok(!$died, "fallback of 1 doesn't cause error") |
| 2682 | || diag("got error of $err"); |
| 2683 | like($val, qr/^OnlyFallbackTrue=HASH\(/, "stringified correctly"); |
| 2684 | } |
| 2685 | } |
| 2686 | |
| 2687 | { |
| 2688 | # Making Regexp class overloaded: avoid infinite recursion. |
| 2689 | # Do this in a separate process since it, well, overloads Regexp! |
| 2690 | fresh_perl_is( |
| 2691 | <<'EOF', |
| 2692 | package Regexp; |
| 2693 | use overload q{""} => sub {$_[0] }; |
| 2694 | package main; |
| 2695 | my $r1 = qr/1/; |
| 2696 | my $r2 = qr/ABC$r1/; |
| 2697 | print $r2,"\n"; |
| 2698 | EOF |
| 2699 | '(?^:ABC(?^:1))', |
| 2700 | { stderr => 1 }, |
| 2701 | 'overloaded REGEXP' |
| 2702 | ); |
| 2703 | } |
| 2704 | |
| 2705 | { |
| 2706 | # RT #121362 |
| 2707 | # splitting the stash HV while rebuilding the overload cache gave |
| 2708 | # valgrind errors. This test code triggers such a split. It doesn't |
| 2709 | # actually test anything; its just there for valgrind to spot |
| 2710 | # problems. |
| 2711 | |
| 2712 | package A_121362; |
| 2713 | |
| 2714 | sub stringify { } |
| 2715 | use overload '""' => 'stringify'; |
| 2716 | |
| 2717 | package B_121362; |
| 2718 | our @ISA = qw(A_121362); |
| 2719 | |
| 2720 | package main; |
| 2721 | |
| 2722 | my $x = bless { }, 'B_121362'; |
| 2723 | |
| 2724 | for ('a'..'z') { |
| 2725 | delete $B_121362::{stringify}; # delete cache entry |
| 2726 | no strict 'refs'; |
| 2727 | *{"B_121362::$_"} = sub { }; # increase size of %B_121362 |
| 2728 | my $y = $x->{value}; # trigger cache add to %B_121362 |
| 2729 | } |
| 2730 | pass("RT 121362"); |
| 2731 | } |
| 2732 | |
| 2733 | package refsgalore { |
| 2734 | use overload |
| 2735 | '${}' => sub { \42 }, |
| 2736 | '@{}' => sub { [43] }, |
| 2737 | '%{}' => sub { { 44 => 45 } }, |
| 2738 | '&{}' => sub { sub { 46 } }; |
| 2739 | } |
| 2740 | { |
| 2741 | use feature 'postderef'; |
| 2742 | no warnings 'experimental::postderef'; |
| 2743 | tell myio; # vivifies *myio{IO} at compile time |
| 2744 | use constant ioref => bless *myio{IO}, refsgalore::; |
| 2745 | is ioref->$*, 42, '(overloaded constant that is not a scalar ref)->$*'; |
| 2746 | is ioref->[0], 43, '(ovrld constant that is not an array ref)->[0]'; |
| 2747 | is ioref->{44}, 45, "(ovrld const that is not a hash ref)->{key}"; |
| 2748 | is ioref->(), 46, '(overloaded constant that is not a sub ref)->()'; |
| 2749 | } |
| 2750 | |
| 2751 | package xstack { use overload 'x' => sub { shift . " x " . shift }, |
| 2752 | '""'=> sub { "xstack" } } |
| 2753 | is join(",", 1..3, scalar((bless([], 'xstack')) x 3, 1), 4..6), |
| 2754 | "1,2,3,1,4,5,6", |
| 2755 | '(...)x... in void cx with x overloaded [perl #121827]'; |
| 2756 | |
| 2757 | { # undefining the overload stash -- KEEP THIS TEST LAST |
| 2758 | package ant; |
| 2759 | use overload '+' => 'onion'; |
| 2760 | $_ = \&overload::nil; |
| 2761 | undef %overload::; |
| 2762 | ()=0+bless[]; |
| 2763 | ::ok(1, 'no crash when undefining %overload::'); |
| 2764 | } |
| 2765 | |
| 2766 | |
| 2767 | # EOF |