| 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 => 4882; |
| 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, "88"); |
| 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, "90"); |
| 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 blessing to a package updates hash |
| 271 | |
| 272 | eval "package Oscalar; no overload '.'"; |
| 273 | |
| 274 | is("b${a}", "_.b.__.xx._"); |
| 275 | $x="1"; |
| 276 | bless \$x, Oscalar; |
| 277 | is("b${a}c", "bxxc"); |
| 278 | new Oscalar 1; |
| 279 | is("b${a}c", "bxxc"); |
| 280 | |
| 281 | # Negative overloading: |
| 282 | |
| 283 | $na = eval { ~$a }; |
| 284 | like($@, qr/no method found/); |
| 285 | |
| 286 | # Check AUTOLOADING: |
| 287 | |
| 288 | *Oscalar::AUTOLOAD = |
| 289 | sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ; |
| 290 | goto &{"Oscalar::$AUTOLOAD"}}; |
| 291 | |
| 292 | eval "package Oscalar; sub comple; use overload '~' => 'comple'"; |
| 293 | |
| 294 | $na = eval { ~$a }; # Hash was not updated |
| 295 | like($@, qr/no method found/); |
| 296 | |
| 297 | bless \$x, Oscalar; |
| 298 | |
| 299 | $na = eval { ~$a }; # Hash updated |
| 300 | warn "`$na', $@" if $@; |
| 301 | ok !$@; |
| 302 | is($na, '_!_xx_!_'); |
| 303 | |
| 304 | $na = 0; |
| 305 | |
| 306 | $na = eval { ~$aI }; # Hash was not updated |
| 307 | like($@, qr/no method found/); |
| 308 | |
| 309 | bless \$x, OscalarI; |
| 310 | |
| 311 | $na = eval { ~$aI }; |
| 312 | print $@; |
| 313 | |
| 314 | ok(!$@); |
| 315 | is($na, '_!_xx_!_'); |
| 316 | |
| 317 | eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'"; |
| 318 | |
| 319 | $na = eval { $aI >> 1 }; # Hash was not updated |
| 320 | like($@, qr/no method found/); |
| 321 | |
| 322 | bless \$x, OscalarI; |
| 323 | |
| 324 | $na = 0; |
| 325 | |
| 326 | $na = eval { $aI >> 1 }; |
| 327 | print $@; |
| 328 | |
| 329 | ok(!$@); |
| 330 | is($na, '_!_xx_!_'); |
| 331 | |
| 332 | # warn overload::Method($a, '0+'), "\n"; |
| 333 | is(overload::Method($a, '0+'), \&Oscalar::numify); |
| 334 | is(overload::Method($aI,'0+'), \&Oscalar::numify); |
| 335 | ok(overload::Overloaded($aI)); |
| 336 | ok(!overload::Overloaded('overload')); |
| 337 | |
| 338 | ok(! defined overload::Method($aI, '<<')); |
| 339 | ok(! defined overload::Method($a, '<')); |
| 340 | |
| 341 | like (overload::StrVal($aI), qr/^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); |
| 342 | is(overload::StrVal(\$aI), "@{[\$aI]}"); |
| 343 | |
| 344 | # Check overloading by methods (specified deep in the ISA tree). |
| 345 | { |
| 346 | package OscalarII; |
| 347 | @ISA = 'OscalarI'; |
| 348 | sub Oscalar::lshft {"_<<_" . shift() . "_<<_"} |
| 349 | eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'"; |
| 350 | } |
| 351 | |
| 352 | $aaII = "087"; |
| 353 | $aII = \$aaII; |
| 354 | bless $aII, 'OscalarII'; |
| 355 | bless \$fake, 'OscalarI'; # update the hash |
| 356 | is(($aI | 3), '_<<_xx_<<_'); |
| 357 | # warn $aII << 3; |
| 358 | is(($aII << 3), '_<<_087_<<_'); |
| 359 | |
| 360 | { |
| 361 | BEGIN { $int = 7; overload::constant 'integer' => sub {$int++; shift}; } |
| 362 | $out = 2**10; |
| 363 | } |
| 364 | is($int, 9); |
| 365 | is($out, 1024); |
| 366 | is($int, 9); |
| 367 | { |
| 368 | BEGIN { overload::constant 'integer' => sub {$int++; shift()+1}; } |
| 369 | eval q{$out = 42}; |
| 370 | } |
| 371 | is($int, 10); |
| 372 | is($out, 43); |
| 373 | |
| 374 | $foo = 'foo'; |
| 375 | $foo1 = 'f\'o\\o'; |
| 376 | { |
| 377 | BEGIN { $q = $qr = 7; |
| 378 | overload::constant 'q' => sub {$q++; push @q, shift, ($_[1] || 'none'); shift}, |
| 379 | 'qr' => sub {$qr++; push @qr, shift, ($_[1] || 'none'); shift}; } |
| 380 | $out = 'foo'; |
| 381 | $out1 = 'f\'o\\o'; |
| 382 | $out2 = "a\a$foo,\,"; |
| 383 | /b\b$foo.\./; |
| 384 | } |
| 385 | |
| 386 | is($out, 'foo'); |
| 387 | is($out, $foo); |
| 388 | is($out1, 'f\'o\\o'); |
| 389 | is($out1, $foo1); |
| 390 | is($out2, "a\afoo,\,"); |
| 391 | is("@q", "foo q f'o\\\\o q a\\a qq ,\\, qq"); |
| 392 | is($q, 11); |
| 393 | is("@qr", "b\\b qq .\\. qq"); |
| 394 | is($qr, 9); |
| 395 | |
| 396 | { |
| 397 | $_ = '!<b>!foo!<-.>!'; |
| 398 | BEGIN { overload::constant 'q' => sub {push @q1, shift, ($_[1] || 'none'); "_<" . (shift) . ">_"}, |
| 399 | 'qr' => sub {push @qr1, shift, ($_[1] || 'none'); "!<" . (shift) . ">!"}; } |
| 400 | $out = 'foo'; |
| 401 | $out1 = 'f\'o\\o'; |
| 402 | $out2 = "a\a$foo,\,"; |
| 403 | $res = /b\b$foo.\./; |
| 404 | $a = <<EOF; |
| 405 | oups |
| 406 | EOF |
| 407 | $b = <<'EOF'; |
| 408 | oups1 |
| 409 | EOF |
| 410 | $c = bareword; |
| 411 | m'try it'; |
| 412 | s'first part'second part'; |
| 413 | s/yet another/tail here/; |
| 414 | tr/A-Z/a-z/; |
| 415 | } |
| 416 | |
| 417 | is($out, '_<foo>_'); |
| 418 | is($out1, '_<f\'o\\o>_'); |
| 419 | is($out2, "_<a\a>_foo_<,\,>_"); |
| 420 | is("@q1", "foo q f'o\\\\o q a\\a qq ,\\, qq oups |
| 421 | qq oups1 |
| 422 | q second part q tail here s A-Z tr a-z tr"); |
| 423 | is("@qr1", "b\\b qq .\\. qq try it q first part q yet another qq"); |
| 424 | is($res, 1); |
| 425 | is($a, "_<oups |
| 426 | >_"); |
| 427 | is($b, "_<oups1 |
| 428 | >_"); |
| 429 | is($c, "bareword"); |
| 430 | |
| 431 | { |
| 432 | package symbolic; # Primitive symbolic calculator |
| 433 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, |
| 434 | '=' => \&cpy, '++' => \&inc, '--' => \&dec; |
| 435 | |
| 436 | sub new { shift; bless ['n', @_] } |
| 437 | sub cpy { |
| 438 | my $self = shift; |
| 439 | bless [@$self], ref $self; |
| 440 | } |
| 441 | sub inc { $_[0] = bless ['++', $_[0], 1]; } |
| 442 | sub dec { $_[0] = bless ['--', $_[0], 1]; } |
| 443 | sub wrap { |
| 444 | my ($obj, $other, $inv, $meth) = @_; |
| 445 | if ($meth eq '++' or $meth eq '--') { |
| 446 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference |
| 447 | return $obj; |
| 448 | } |
| 449 | ($obj, $other) = ($other, $obj) if $inv; |
| 450 | bless [$meth, $obj, $other]; |
| 451 | } |
| 452 | sub str { |
| 453 | my ($meth, $a, $b) = @{+shift}; |
| 454 | $a = 'u' unless defined $a; |
| 455 | if (defined $b) { |
| 456 | "[$meth $a $b]"; |
| 457 | } else { |
| 458 | "[$meth $a]"; |
| 459 | } |
| 460 | } |
| 461 | my %subr = ( 'n' => sub {$_[0]} ); |
| 462 | foreach my $op (split " ", $overload::ops{with_assign}) { |
| 463 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; |
| 464 | } |
| 465 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); |
| 466 | foreach my $op (split " ", "@overload::ops{ @bins }") { |
| 467 | $subr{$op} = eval "sub {shift() $op shift()}"; |
| 468 | } |
| 469 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { |
| 470 | $subr{$op} = eval "sub {$op shift()}"; |
| 471 | } |
| 472 | $subr{'++'} = $subr{'+'}; |
| 473 | $subr{'--'} = $subr{'-'}; |
| 474 | |
| 475 | sub num { |
| 476 | my ($meth, $a, $b) = @{+shift}; |
| 477 | my $subr = $subr{$meth} |
| 478 | or die "Do not know how to ($meth) in symbolic"; |
| 479 | $a = $a->num if ref $a eq __PACKAGE__; |
| 480 | $b = $b->num if ref $b eq __PACKAGE__; |
| 481 | $subr->($a,$b); |
| 482 | } |
| 483 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } |
| 484 | sub FETCH { shift } |
| 485 | sub nop { } # Around a bug |
| 486 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; } |
| 487 | sub STORE { |
| 488 | my $obj = shift; |
| 489 | $#$obj = 1; |
| 490 | $obj->[1] = shift; |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | { |
| 495 | my $foo = new symbolic 11; |
| 496 | my $baz = $foo++; |
| 497 | is((sprintf "%d", $foo), '12'); |
| 498 | is((sprintf "%d", $baz), '11'); |
| 499 | my $bar = $foo; |
| 500 | $baz = ++$foo; |
| 501 | is((sprintf "%d", $foo), '13'); |
| 502 | is((sprintf "%d", $bar), '12'); |
| 503 | is((sprintf "%d", $baz), '13'); |
| 504 | my $ban = $foo; |
| 505 | $baz = ($foo += 1); |
| 506 | is((sprintf "%d", $foo), '14'); |
| 507 | is((sprintf "%d", $bar), '12'); |
| 508 | is((sprintf "%d", $baz), '14'); |
| 509 | is((sprintf "%d", $ban), '13'); |
| 510 | $baz = 0; |
| 511 | $baz = $foo++; |
| 512 | is((sprintf "%d", $foo), '15'); |
| 513 | is((sprintf "%d", $baz), '14'); |
| 514 | is("$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]'); |
| 515 | } |
| 516 | |
| 517 | { |
| 518 | my $iter = new symbolic 2; |
| 519 | my $side = new symbolic 1; |
| 520 | my $cnt = $iter; |
| 521 | |
| 522 | while ($cnt) { |
| 523 | $cnt = $cnt - 1; # The "simple" way |
| 524 | $side = (sqrt(1 + $side**2) - 1)/$side; |
| 525 | } |
| 526 | my $pi = $side*(2**($iter+2)); |
| 527 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
| 528 | is((sprintf "%f", $pi), '3.182598'); |
| 529 | } |
| 530 | |
| 531 | { |
| 532 | my $iter = new symbolic 2; |
| 533 | my $side = new symbolic 1; |
| 534 | my $cnt = $iter; |
| 535 | |
| 536 | while ($cnt--) { |
| 537 | $side = (sqrt(1 + $side**2) - 1)/$side; |
| 538 | } |
| 539 | my $pi = $side*(2**($iter+2)); |
| 540 | is("$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]'); |
| 541 | is((sprintf "%f", $pi), '3.182598'); |
| 542 | } |
| 543 | |
| 544 | { |
| 545 | my ($a, $b); |
| 546 | symbolic->vars($a, $b); |
| 547 | my $c = sqrt($a**2 + $b**2); |
| 548 | $a = 3; $b = 4; |
| 549 | is((sprintf "%d", $c), '5'); |
| 550 | $a = 12; $b = 5; |
| 551 | is((sprintf "%d", $c), '13'); |
| 552 | } |
| 553 | |
| 554 | { |
| 555 | package symbolic1; # Primitive symbolic calculator |
| 556 | # Mutator inc/dec |
| 557 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, '=' => \&cpy; |
| 558 | |
| 559 | sub new { shift; bless ['n', @_] } |
| 560 | sub cpy { |
| 561 | my $self = shift; |
| 562 | bless [@$self], ref $self; |
| 563 | } |
| 564 | sub wrap { |
| 565 | my ($obj, $other, $inv, $meth) = @_; |
| 566 | if ($meth eq '++' or $meth eq '--') { |
| 567 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference |
| 568 | return $obj; |
| 569 | } |
| 570 | ($obj, $other) = ($other, $obj) if $inv; |
| 571 | bless [$meth, $obj, $other]; |
| 572 | } |
| 573 | sub str { |
| 574 | my ($meth, $a, $b) = @{+shift}; |
| 575 | $a = 'u' unless defined $a; |
| 576 | if (defined $b) { |
| 577 | "[$meth $a $b]"; |
| 578 | } else { |
| 579 | "[$meth $a]"; |
| 580 | } |
| 581 | } |
| 582 | my %subr = ( 'n' => sub {$_[0]} ); |
| 583 | foreach my $op (split " ", $overload::ops{with_assign}) { |
| 584 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}"; |
| 585 | } |
| 586 | my @bins = qw(binary 3way_comparison num_comparison str_comparison); |
| 587 | foreach my $op (split " ", "@overload::ops{ @bins }") { |
| 588 | $subr{$op} = eval "sub {shift() $op shift()}"; |
| 589 | } |
| 590 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") { |
| 591 | $subr{$op} = eval "sub {$op shift()}"; |
| 592 | } |
| 593 | $subr{'++'} = $subr{'+'}; |
| 594 | $subr{'--'} = $subr{'-'}; |
| 595 | |
| 596 | sub num { |
| 597 | my ($meth, $a, $b) = @{+shift}; |
| 598 | my $subr = $subr{$meth} |
| 599 | or die "Do not know how to ($meth) in symbolic"; |
| 600 | $a = $a->num if ref $a eq __PACKAGE__; |
| 601 | $b = $b->num if ref $b eq __PACKAGE__; |
| 602 | $subr->($a,$b); |
| 603 | } |
| 604 | sub TIESCALAR { my $pack = shift; $pack->new(@_) } |
| 605 | sub FETCH { shift } |
| 606 | sub nop { } # Around a bug |
| 607 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; } |
| 608 | sub STORE { |
| 609 | my $obj = shift; |
| 610 | $#$obj = 1; |
| 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 | # XXX iterator overload not intended to work with CORE::GLOBAL? |
| 711 | if (defined &CORE::GLOBAL::glob) { |
| 712 | is('1', '1'); |
| 713 | is('1', '1'); |
| 714 | is('1', '1'); |
| 715 | } |
| 716 | else { |
| 717 | my $iter = iterator->new(5); |
| 718 | my $acc = ''; |
| 719 | my $out; |
| 720 | $acc .= " $out" while $out = <${iter}>; |
| 721 | is($acc, ' 5 4 3 2 1 0'); |
| 722 | $iter = iterator->new(5); |
| 723 | is(scalar <${iter}>, '5'); |
| 724 | $acc = ''; |
| 725 | $acc .= " $out" while $out = <$iter>; |
| 726 | is($acc, ' 4 3 2 1 0'); |
| 727 | } |
| 728 | { |
| 729 | package deref; |
| 730 | use overload '%{}' => \&hderef, '&{}' => \&cderef, |
| 731 | '*{}' => \&gderef, '${}' => \&sderef, '@{}' => \&aderef; |
| 732 | sub new { my ($p, $v) = @_; bless \$v, $p } |
| 733 | sub deref { |
| 734 | my ($self, $key) = (shift, shift); |
| 735 | my $class = ref $self; |
| 736 | bless $self, 'deref::dummy'; # Disable overloading of %{} |
| 737 | my $out = $self->{$key}; |
| 738 | bless $self, $class; # Restore overloading |
| 739 | $out; |
| 740 | } |
| 741 | sub hderef {shift->deref('h')} |
| 742 | sub aderef {shift->deref('a')} |
| 743 | sub cderef {shift->deref('c')} |
| 744 | sub gderef {shift->deref('g')} |
| 745 | sub sderef {shift->deref('s')} |
| 746 | } |
| 747 | { |
| 748 | my $deref = bless { h => { foo => 5 , fake => 23 }, |
| 749 | c => sub {return shift() + 34}, |
| 750 | 's' => \123, |
| 751 | a => [11..13], |
| 752 | g => \*srt, |
| 753 | }, 'deref'; |
| 754 | # Hash: |
| 755 | my @cont = sort %$deref; |
| 756 | if ("\t" eq "\011") { # ASCII |
| 757 | is("@cont", '23 5 fake foo'); |
| 758 | } |
| 759 | else { # EBCDIC alpha-numeric sort order |
| 760 | is("@cont", 'fake foo 23 5'); |
| 761 | } |
| 762 | my @keys = sort keys %$deref; |
| 763 | is("@keys", 'fake foo'); |
| 764 | my @val = sort values %$deref; |
| 765 | is("@val", '23 5'); |
| 766 | is($deref->{foo}, 5); |
| 767 | is(defined $deref->{bar}, ''); |
| 768 | my $key; |
| 769 | @keys = (); |
| 770 | push @keys, $key while $key = each %$deref; |
| 771 | @keys = sort @keys; |
| 772 | is("@keys", 'fake foo'); |
| 773 | is(exists $deref->{bar}, ''); |
| 774 | is(exists $deref->{foo}, 1); |
| 775 | # Code: |
| 776 | is($deref->(5), 39); |
| 777 | is(&$deref(6), 40); |
| 778 | sub xxx_goto { goto &$deref } |
| 779 | is(xxx_goto(7), 41); |
| 780 | my $srt = bless { c => sub {$b <=> $a} |
| 781 | }, 'deref'; |
| 782 | *srt = \&$srt; |
| 783 | my @sorted = sort srt 11, 2, 5, 1, 22; |
| 784 | is("@sorted", '22 11 5 2 1'); |
| 785 | # Scalar |
| 786 | is($$deref, 123); |
| 787 | # Code |
| 788 | @sorted = sort $srt 11, 2, 5, 1, 22; |
| 789 | is("@sorted", '22 11 5 2 1'); |
| 790 | # Array |
| 791 | is("@$deref", '11 12 13'); |
| 792 | is($#$deref, '2'); |
| 793 | my $l = @$deref; |
| 794 | is($l, 3); |
| 795 | is($deref->[2], '13'); |
| 796 | $l = pop @$deref; |
| 797 | is($l, 13); |
| 798 | $l = 1; |
| 799 | is($deref->[$l], '12'); |
| 800 | # Repeated dereference |
| 801 | my $double = bless { h => $deref, |
| 802 | }, 'deref'; |
| 803 | is($double->{foo}, 5); |
| 804 | } |
| 805 | |
| 806 | { |
| 807 | package two_refs; |
| 808 | use overload '%{}' => \&gethash, '@{}' => sub { ${shift()} }; |
| 809 | sub new { |
| 810 | my $p = shift; |
| 811 | bless \ [@_], $p; |
| 812 | } |
| 813 | sub gethash { |
| 814 | my %h; |
| 815 | my $self = shift; |
| 816 | tie %h, ref $self, $self; |
| 817 | \%h; |
| 818 | } |
| 819 | |
| 820 | sub TIEHASH { my $p = shift; bless \ shift, $p } |
| 821 | my %fields; |
| 822 | my $i = 0; |
| 823 | $fields{$_} = $i++ foreach qw{zero one two three}; |
| 824 | sub STORE { |
| 825 | my $self = ${shift()}; |
| 826 | my $key = $fields{shift()}; |
| 827 | defined $key or die "Out of band access"; |
| 828 | $$self->[$key] = shift; |
| 829 | } |
| 830 | sub FETCH { |
| 831 | my $self = ${shift()}; |
| 832 | my $key = $fields{shift()}; |
| 833 | defined $key or die "Out of band access"; |
| 834 | $$self->[$key]; |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | my $bar = new two_refs 3,4,5,6; |
| 839 | $bar->[2] = 11; |
| 840 | is($bar->{two}, 11); |
| 841 | $bar->{three} = 13; |
| 842 | is($bar->[3], 13); |
| 843 | |
| 844 | { |
| 845 | package two_refs_o; |
| 846 | @ISA = ('two_refs'); |
| 847 | } |
| 848 | |
| 849 | $bar = new two_refs_o 3,4,5,6; |
| 850 | $bar->[2] = 11; |
| 851 | is($bar->{two}, 11); |
| 852 | $bar->{three} = 13; |
| 853 | is($bar->[3], 13); |
| 854 | |
| 855 | { |
| 856 | package two_refs1; |
| 857 | use overload '%{}' => sub { ${shift()}->[1] }, |
| 858 | '@{}' => sub { ${shift()}->[0] }; |
| 859 | sub new { |
| 860 | my $p = shift; |
| 861 | my $a = [@_]; |
| 862 | my %h; |
| 863 | tie %h, $p, $a; |
| 864 | bless \ [$a, \%h], $p; |
| 865 | } |
| 866 | sub gethash { |
| 867 | my %h; |
| 868 | my $self = shift; |
| 869 | tie %h, ref $self, $self; |
| 870 | \%h; |
| 871 | } |
| 872 | |
| 873 | sub TIEHASH { my $p = shift; bless \ shift, $p } |
| 874 | my %fields; |
| 875 | my $i = 0; |
| 876 | $fields{$_} = $i++ foreach qw{zero one two three}; |
| 877 | sub STORE { |
| 878 | my $a = ${shift()}; |
| 879 | my $key = $fields{shift()}; |
| 880 | defined $key or die "Out of band access"; |
| 881 | $a->[$key] = shift; |
| 882 | } |
| 883 | sub FETCH { |
| 884 | my $a = ${shift()}; |
| 885 | my $key = $fields{shift()}; |
| 886 | defined $key or die "Out of band access"; |
| 887 | $a->[$key]; |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | $bar = new two_refs_o 3,4,5,6; |
| 892 | $bar->[2] = 11; |
| 893 | is($bar->{two}, 11); |
| 894 | $bar->{three} = 13; |
| 895 | is($bar->[3], 13); |
| 896 | |
| 897 | { |
| 898 | package two_refs1_o; |
| 899 | @ISA = ('two_refs1'); |
| 900 | } |
| 901 | |
| 902 | $bar = new two_refs1_o 3,4,5,6; |
| 903 | $bar->[2] = 11; |
| 904 | is($bar->{two}, 11); |
| 905 | $bar->{three} = 13; |
| 906 | is($bar->[3], 13); |
| 907 | |
| 908 | { |
| 909 | package B; |
| 910 | use overload bool => sub { ${+shift} }; |
| 911 | } |
| 912 | |
| 913 | my $aaa; |
| 914 | { my $bbbb = 0; $aaa = bless \$bbbb, B } |
| 915 | |
| 916 | is !$aaa, 1; |
| 917 | |
| 918 | unless ($aaa) { |
| 919 | pass(); |
| 920 | } else { |
| 921 | fail(); |
| 922 | } |
| 923 | |
| 924 | # check that overload isn't done twice by join |
| 925 | { my $c = 0; |
| 926 | package Join; |
| 927 | use overload '""' => sub { $c++ }; |
| 928 | my $x = join '', bless([]), 'pq', bless([]); |
| 929 | main::is $x, '0pq1'; |
| 930 | }; |
| 931 | |
| 932 | # Test module-specific warning |
| 933 | { |
| 934 | # check the Odd number of arguments for overload::constant warning |
| 935 | my $a = "" ; |
| 936 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
| 937 | $x = eval ' overload::constant "integer" ; ' ; |
| 938 | is($a, ""); |
| 939 | use warnings 'overload' ; |
| 940 | $x = eval ' overload::constant "integer" ; ' ; |
| 941 | like($a, qr/^Odd number of arguments for overload::constant at/); |
| 942 | } |
| 943 | |
| 944 | { |
| 945 | # check the `$_[0]' is not an overloadable type warning |
| 946 | my $a = "" ; |
| 947 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
| 948 | $x = eval ' overload::constant "fred" => sub {} ; ' ; |
| 949 | is($a, ""); |
| 950 | use warnings 'overload' ; |
| 951 | $x = eval ' overload::constant "fred" => sub {} ; ' ; |
| 952 | like($a, qr/^`fred' is not an overloadable type at/); |
| 953 | } |
| 954 | |
| 955 | { |
| 956 | # check the `$_[1]' is not a code reference warning |
| 957 | my $a = "" ; |
| 958 | local $SIG{__WARN__} = sub {$a = $_[0]} ; |
| 959 | $x = eval ' overload::constant "integer" => 1; ' ; |
| 960 | is($a, ""); |
| 961 | use warnings 'overload' ; |
| 962 | $x = eval ' overload::constant "integer" => 1; ' ; |
| 963 | like($a, qr/^`1' is not a code reference at/); |
| 964 | } |
| 965 | |
| 966 | { |
| 967 | my $c = 0; |
| 968 | package ov_int1; |
| 969 | use overload '""' => sub { 3+shift->[0] }, |
| 970 | '0+' => sub { 10+shift->[0] }, |
| 971 | 'int' => sub { 100+shift->[0] }; |
| 972 | sub new {my $p = shift; bless [shift], $p} |
| 973 | |
| 974 | package ov_int2; |
| 975 | use overload '""' => sub { 5+shift->[0] }, |
| 976 | '0+' => sub { 30+shift->[0] }, |
| 977 | 'int' => sub { 'ov_int1'->new(1000+shift->[0]) }; |
| 978 | sub new {my $p = shift; bless [shift], $p} |
| 979 | |
| 980 | package noov_int; |
| 981 | use overload '""' => sub { 2+shift->[0] }, |
| 982 | '0+' => sub { 9+shift->[0] }; |
| 983 | sub new {my $p = shift; bless [shift], $p} |
| 984 | |
| 985 | package main; |
| 986 | |
| 987 | my $x = new noov_int 11; |
| 988 | my $int_x = int $x; |
| 989 | main::is("$int_x", 20); |
| 990 | $x = new ov_int1 31; |
| 991 | $int_x = int $x; |
| 992 | main::is("$int_x", 131); |
| 993 | $x = new ov_int2 51; |
| 994 | $int_x = int $x; |
| 995 | main::is("$int_x", 1054); |
| 996 | } |
| 997 | |
| 998 | # make sure that we don't infinitely recurse |
| 999 | { |
| 1000 | my $c = 0; |
| 1001 | package Recurse; |
| 1002 | use overload '""' => sub { shift }, |
| 1003 | '0+' => sub { shift }, |
| 1004 | 'bool' => sub { shift }, |
| 1005 | fallback => 1; |
| 1006 | my $x = bless([]); |
| 1007 | # For some reason beyond me these have to be oks rather than likes. |
| 1008 | main::ok("$x" =~ /Recurse=ARRAY/); |
| 1009 | main::ok($x); |
| 1010 | main::ok($x+0 =~ qr/Recurse=ARRAY/); |
| 1011 | } |
| 1012 | |
| 1013 | # BugID 20010422.003 |
| 1014 | package Foo; |
| 1015 | |
| 1016 | use overload |
| 1017 | 'bool' => sub { return !$_[0]->is_zero() || undef; } |
| 1018 | ; |
| 1019 | |
| 1020 | sub is_zero |
| 1021 | { |
| 1022 | my $self = shift; |
| 1023 | return $self->{var} == 0; |
| 1024 | } |
| 1025 | |
| 1026 | sub new |
| 1027 | { |
| 1028 | my $class = shift; |
| 1029 | my $self = {}; |
| 1030 | $self->{var} = shift; |
| 1031 | bless $self,$class; |
| 1032 | } |
| 1033 | |
| 1034 | package main; |
| 1035 | |
| 1036 | use strict; |
| 1037 | |
| 1038 | my $r = Foo->new(8); |
| 1039 | $r = Foo->new(0); |
| 1040 | |
| 1041 | is(($r || 0), 0); |
| 1042 | |
| 1043 | package utf8_o; |
| 1044 | |
| 1045 | use overload |
| 1046 | '""' => sub { return $_[0]->{var}; } |
| 1047 | ; |
| 1048 | |
| 1049 | sub new |
| 1050 | { |
| 1051 | my $class = shift; |
| 1052 | my $self = {}; |
| 1053 | $self->{var} = shift; |
| 1054 | bless $self,$class; |
| 1055 | } |
| 1056 | |
| 1057 | package main; |
| 1058 | |
| 1059 | |
| 1060 | my $utfvar = new utf8_o 200.2.1; |
| 1061 | is("$utfvar", 200.2.1); # 223 - stringify |
| 1062 | is("a$utfvar", "a".200.2.1); # 224 - overload via sv_2pv_flags |
| 1063 | |
| 1064 | # 225..227 -- more %{} tests. Hangs in 5.6.0, okay in later releases. |
| 1065 | # Basically this example implements strong encapsulation: if Hderef::import() |
| 1066 | # were to eval the overload code in the caller's namespace, the privatisation |
| 1067 | # would be quite transparent. |
| 1068 | package Hderef; |
| 1069 | use overload '%{}' => sub { (caller(0))[0] eq 'Foo' ? $_[0] : die "zap" }; |
| 1070 | package Foo; |
| 1071 | @Foo::ISA = 'Hderef'; |
| 1072 | sub new { bless {}, shift } |
| 1073 | sub xet { @_ == 2 ? $_[0]->{$_[1]} : |
| 1074 | @_ == 3 ? ($_[0]->{$_[1]} = $_[2]) : undef } |
| 1075 | package main; |
| 1076 | my $a = Foo->new; |
| 1077 | $a->xet('b', 42); |
| 1078 | is ($a->xet('b'), 42); |
| 1079 | ok (!defined eval { $a->{b} }); |
| 1080 | like ($@, qr/zap/); |
| 1081 | |
| 1082 | { |
| 1083 | package t229; |
| 1084 | use overload '=' => sub { 42 }, |
| 1085 | '++' => sub { my $x = ${$_[0]}; $_[0] }; |
| 1086 | sub new { my $x = 42; bless \$x } |
| 1087 | |
| 1088 | my $warn; |
| 1089 | { |
| 1090 | local $SIG{__WARN__} = sub { $warn++ }; |
| 1091 | my $x = t229->new; |
| 1092 | my $y = $x; |
| 1093 | eval { $y++ }; |
| 1094 | } |
| 1095 | main::ok (!$warn); |
| 1096 | } |
| 1097 | |
| 1098 | { |
| 1099 | my ($int, $out1, $out2); |
| 1100 | { |
| 1101 | BEGIN { $int = 0; overload::constant 'integer' => sub {$int++; 17}; } |
| 1102 | $out1 = 0; |
| 1103 | $out2 = 1; |
| 1104 | } |
| 1105 | is($int, 2, "#24313"); # 230 |
| 1106 | is($out1, 17, "#24313"); # 231 |
| 1107 | is($out2, 17, "#24313"); # 232 |
| 1108 | } |
| 1109 | |
| 1110 | { |
| 1111 | package Numify; |
| 1112 | use overload (qw(0+ numify fallback 1)); |
| 1113 | |
| 1114 | sub new { |
| 1115 | my $val = $_[1]; |
| 1116 | bless \$val, $_[0]; |
| 1117 | } |
| 1118 | |
| 1119 | sub numify { ${$_[0]} } |
| 1120 | } |
| 1121 | |
| 1122 | { |
| 1123 | package perl31793; |
| 1124 | use overload cmp => sub { 0 }; |
| 1125 | package perl31793_fb; |
| 1126 | use overload cmp => sub { 0 }, fallback => 1; |
| 1127 | package main; |
| 1128 | my $o = bless [], 'perl31793'; |
| 1129 | my $of = bless [], 'perl31793_fb'; |
| 1130 | my $no = bless [], 'no_overload'; |
| 1131 | like(overload::StrVal(\"scalar"), qr/^SCALAR\(0x[0-9a-f]+\)$/); |
| 1132 | like(overload::StrVal([]), qr/^ARRAY\(0x[0-9a-f]+\)$/); |
| 1133 | like(overload::StrVal({}), qr/^HASH\(0x[0-9a-f]+\)$/); |
| 1134 | like(overload::StrVal(sub{1}), qr/^CODE\(0x[0-9a-f]+\)$/); |
| 1135 | like(overload::StrVal(\*GLOB), qr/^GLOB\(0x[0-9a-f]+\)$/); |
| 1136 | like(overload::StrVal(\$o), qr/^REF\(0x[0-9a-f]+\)$/); |
| 1137 | like(overload::StrVal(qr/a/), qr/^Regexp=REGEXP\(0x[0-9a-f]+\)$/); |
| 1138 | like(overload::StrVal($o), qr/^perl31793=ARRAY\(0x[0-9a-f]+\)$/); |
| 1139 | like(overload::StrVal($of), qr/^perl31793_fb=ARRAY\(0x[0-9a-f]+\)$/); |
| 1140 | like(overload::StrVal($no), qr/^no_overload=ARRAY\(0x[0-9a-f]+\)$/); |
| 1141 | } |
| 1142 | |
| 1143 | # These are all check that overloaded values rather than reference addresses |
| 1144 | # are what is getting tested. |
| 1145 | my ($two, $one, $un, $deux) = map {new Numify $_} 2, 1, 1, 2; |
| 1146 | my ($ein, $zwei) = (1, 2); |
| 1147 | |
| 1148 | my %map = (one => 1, un => 1, ein => 1, deux => 2, two => 2, zwei => 2); |
| 1149 | foreach my $op (qw(<=> == != < <= > >=)) { |
| 1150 | foreach my $l (keys %map) { |
| 1151 | foreach my $r (keys %map) { |
| 1152 | my $ocode = "\$$l $op \$$r"; |
| 1153 | my $rcode = "$map{$l} $op $map{$r}"; |
| 1154 | |
| 1155 | my $got = eval $ocode; |
| 1156 | die if $@; |
| 1157 | my $expect = eval $rcode; |
| 1158 | die if $@; |
| 1159 | is ($got, $expect, $ocode) or print "# $rcode\n"; |
| 1160 | } |
| 1161 | } |
| 1162 | } |
| 1163 | { |
| 1164 | # check that overloading works in regexes |
| 1165 | { |
| 1166 | package Foo493; |
| 1167 | use overload |
| 1168 | '""' => sub { "^$_[0][0]\$" }, |
| 1169 | '.' => sub { |
| 1170 | bless [ |
| 1171 | $_[2] |
| 1172 | ? (ref $_[1] ? $_[1][0] : $_[1]) . ':' .$_[0][0] |
| 1173 | : $_[0][0] . ':' . (ref $_[1] ? $_[1][0] : $_[1]) |
| 1174 | ], 'Foo493' |
| 1175 | }; |
| 1176 | } |
| 1177 | |
| 1178 | my $a = bless [ "a" ], 'Foo493'; |
| 1179 | like('a', qr/$a/); |
| 1180 | like('x:a', qr/x$a/); |
| 1181 | like('x:a:=', qr/x$a=$/); |
| 1182 | like('x:a:a:=', qr/x$a$a=$/); |
| 1183 | |
| 1184 | } |
| 1185 | |
| 1186 | { |
| 1187 | { |
| 1188 | package QRonly; |
| 1189 | use overload qr => sub { qr/x/ }, fallback => 1; |
| 1190 | } |
| 1191 | { |
| 1192 | my $x = bless [], "QRonly"; |
| 1193 | |
| 1194 | # like tries to be too clever, and decides that $x-stringified |
| 1195 | # doesn't look like a regex |
| 1196 | ok("x" =~ $x, "qr-only matches"); |
| 1197 | ok("y" !~ $x, "qr-only doesn't match what it shouldn't"); |
| 1198 | ok("xx" =~ /x$x/, "qr-only matches with concat"); |
| 1199 | like("$x", qr/^QRonly=ARRAY/, "qr-only doesn't have string overload"); |
| 1200 | |
| 1201 | my $qr = bless qr/y/, "QRonly"; |
| 1202 | ok("x" =~ $qr, "qr with qr-overload uses overload"); |
| 1203 | ok("y" !~ $qr, "qr with qr-overload uses overload"); |
| 1204 | is("$qr", "".qr/y/, "qr with qr-overload stringify"); |
| 1205 | |
| 1206 | my $rx = $$qr; |
| 1207 | ok("y" =~ $rx, "bare rx with qr-overload doesn't overload match"); |
| 1208 | ok("x" !~ $rx, "bare rx with qr-overload doesn't overload match"); |
| 1209 | is("$rx", "".qr/y/, "bare rx with qr-overload stringify"); |
| 1210 | } |
| 1211 | { |
| 1212 | package QRandSTR; |
| 1213 | use overload qr => sub { qr/x/ }, q/""/ => sub { "y" }; |
| 1214 | } |
| 1215 | { |
| 1216 | my $x = bless [], "QRandSTR"; |
| 1217 | ok("x" =~ $x, "qr+str uses qr for match"); |
| 1218 | ok("y" !~ $x, "qr+str uses qr for match"); |
| 1219 | ok("xx" =~ /x$x/, "qr+str uses qr for match with concat"); |
| 1220 | is("$x", "y", "qr+str uses str for stringify"); |
| 1221 | |
| 1222 | my $qr = bless qr/z/, "QRandSTR"; |
| 1223 | is("$qr", "y", "qr with qr+str uses str for stringify"); |
| 1224 | ok("xx" =~ /x$x/, "qr with qr+str uses qr for match"); |
| 1225 | |
| 1226 | my $rx = $$qr; |
| 1227 | ok("z" =~ $rx, "bare rx with qr+str doesn't overload match"); |
| 1228 | is("$rx", "".qr/z/, "bare rx with qr+str doesn't overload stringify"); |
| 1229 | } |
| 1230 | { |
| 1231 | package QRany; |
| 1232 | use overload qr => sub { $_[0]->(@_) }; |
| 1233 | |
| 1234 | package QRself; |
| 1235 | use overload qr => sub { $_[0] }; |
| 1236 | } |
| 1237 | { |
| 1238 | my $rx = bless sub { ${ qr/x/ } }, "QRany"; |
| 1239 | ok("x" =~ $rx, "qr overload accepts a bare rx"); |
| 1240 | ok("y" !~ $rx, "qr overload accepts a bare rx"); |
| 1241 | |
| 1242 | my $str = bless sub { "x" }, "QRany"; |
| 1243 | ok(!eval { "x" =~ $str }, "qr overload doesn't accept a string"); |
| 1244 | like($@, qr/^Overloaded qr did not return a REGEXP/, "correct error"); |
| 1245 | |
| 1246 | my $oqr = bless qr/z/, "QRandSTR"; |
| 1247 | my $oqro = bless sub { $oqr }, "QRany"; |
| 1248 | ok("z" =~ $oqro, "qr overload doesn't recurse"); |
| 1249 | |
| 1250 | my $qrs = bless qr/z/, "QRself"; |
| 1251 | ok("z" =~ $qrs, "qr overload can return self"); |
| 1252 | } |
| 1253 | { |
| 1254 | package STRonly; |
| 1255 | use overload q/""/ => sub { "x" }; |
| 1256 | |
| 1257 | package STRonlyFB; |
| 1258 | use overload q/""/ => sub { "x" }, fallback => 1; |
| 1259 | } |
| 1260 | { |
| 1261 | my $fb = bless [], "STRonlyFB"; |
| 1262 | ok("x" =~ $fb, "qr falls back to \"\""); |
| 1263 | ok("y" !~ $fb, "qr falls back to \"\""); |
| 1264 | |
| 1265 | my $nofb = bless [], "STRonly"; |
| 1266 | ok("x" =~ $nofb, "qr falls back even without fallback"); |
| 1267 | ok("y" !~ $nofb, "qr falls back even without fallback"); |
| 1268 | } |
| 1269 | } |
| 1270 | |
| 1271 | { |
| 1272 | my $twenty_three = 23; |
| 1273 | # Check that constant overloading propagates into evals |
| 1274 | BEGIN { overload::constant integer => sub { 23 } } |
| 1275 | is(eval "17", $twenty_three); |
| 1276 | } |
| 1277 | |
| 1278 | { |
| 1279 | package Sklorsh; |
| 1280 | use overload |
| 1281 | bool => sub { shift->is_cool }; |
| 1282 | |
| 1283 | sub is_cool { |
| 1284 | $_[0]->{name} eq 'cool'; |
| 1285 | } |
| 1286 | |
| 1287 | sub delete { |
| 1288 | undef %{$_[0]}; |
| 1289 | bless $_[0], 'Brap'; |
| 1290 | return 1; |
| 1291 | } |
| 1292 | |
| 1293 | sub delete_with_self { |
| 1294 | my $self = shift; |
| 1295 | undef %$self; |
| 1296 | bless $self, 'Brap'; |
| 1297 | return 1; |
| 1298 | } |
| 1299 | |
| 1300 | package Brap; |
| 1301 | |
| 1302 | 1; |
| 1303 | |
| 1304 | package main; |
| 1305 | |
| 1306 | my $obj; |
| 1307 | $obj = bless {name => 'cool'}, 'Sklorsh'; |
| 1308 | $obj->delete; |
| 1309 | ok(eval {if ($obj) {1}; 1}, $@ || 'reblessed into nonexistent namespace'); |
| 1310 | |
| 1311 | $obj = bless {name => 'cool'}, 'Sklorsh'; |
| 1312 | $obj->delete_with_self; |
| 1313 | ok (eval {if ($obj) {1}; 1}, $@); |
| 1314 | |
| 1315 | my $a = $b = {name => 'hot'}; |
| 1316 | bless $b, 'Sklorsh'; |
| 1317 | is(ref $a, 'Sklorsh'); |
| 1318 | is(ref $b, 'Sklorsh'); |
| 1319 | ok(!$b, "Expect overloaded boolean"); |
| 1320 | ok(!$a, "Expect overloaded boolean"); |
| 1321 | } |
| 1322 | |
| 1323 | { |
| 1324 | package Flrbbbbb; |
| 1325 | use overload |
| 1326 | bool => sub { shift->{truth} eq 'yes' }, |
| 1327 | '0+' => sub { shift->{truth} eq 'yes' ? '1' : '0' }, |
| 1328 | '!' => sub { shift->{truth} eq 'no' }, |
| 1329 | fallback => 1; |
| 1330 | |
| 1331 | sub new { my $class = shift; bless { truth => shift }, $class } |
| 1332 | |
| 1333 | package main; |
| 1334 | |
| 1335 | my $yes = Flrbbbbb->new('yes'); |
| 1336 | my $x; |
| 1337 | $x = 1 if $yes; is($x, 1); |
| 1338 | $x = 2 unless $yes; is($x, 1); |
| 1339 | $x = 3 if !$yes; is($x, 1); |
| 1340 | $x = 4 unless !$yes; is($x, 4); |
| 1341 | |
| 1342 | my $no = Flrbbbbb->new('no'); |
| 1343 | $x = 0; |
| 1344 | $x = 1 if $no; is($x, 0); |
| 1345 | $x = 2 unless $no; is($x, 2); |
| 1346 | $x = 3 if !$no; is($x, 3); |
| 1347 | $x = 4 unless !$no; is($x, 3); |
| 1348 | |
| 1349 | $x = 0; |
| 1350 | $x = 1 if !$no && $yes; is($x, 1); |
| 1351 | $x = 2 unless !$no && $yes; is($x, 1); |
| 1352 | $x = 3 if $no || !$yes; is($x, 1); |
| 1353 | $x = 4 unless $no || !$yes; is($x, 4); |
| 1354 | |
| 1355 | $x = 0; |
| 1356 | $x = 1 if !$no || !$yes; is($x, 1); |
| 1357 | $x = 2 unless !$no || !$yes; is($x, 1); |
| 1358 | $x = 3 if !$no && !$yes; is($x, 1); |
| 1359 | $x = 4 unless !$no && !$yes; is($x, 4); |
| 1360 | } |
| 1361 | |
| 1362 | { |
| 1363 | use Scalar::Util 'weaken'; |
| 1364 | |
| 1365 | package Shklitza; |
| 1366 | use overload '""' => sub {"CLiK KLAK"}; |
| 1367 | |
| 1368 | package Ksshfwoom; |
| 1369 | |
| 1370 | package main; |
| 1371 | |
| 1372 | my ($obj, $ref); |
| 1373 | $obj = bless do {my $a; \$a}, 'Shklitza'; |
| 1374 | $ref = $obj; |
| 1375 | |
| 1376 | is ("$obj", "CLiK KLAK"); |
| 1377 | is ("$ref", "CLiK KLAK"); |
| 1378 | |
| 1379 | weaken $ref; |
| 1380 | is ("$ref", "CLiK KLAK"); |
| 1381 | |
| 1382 | bless $obj, 'Ksshfwoom'; |
| 1383 | |
| 1384 | like ($obj, qr/^Ksshfwoom=/); |
| 1385 | like ($ref, qr/^Ksshfwoom=/); |
| 1386 | |
| 1387 | undef $obj; |
| 1388 | is ($ref, undef); |
| 1389 | } |
| 1390 | |
| 1391 | { |
| 1392 | package bit; |
| 1393 | # bit operations have overloadable assignment variants too |
| 1394 | |
| 1395 | sub new { bless \$_[1], $_[0] } |
| 1396 | |
| 1397 | use overload |
| 1398 | "&=" => sub { bit->new($_[0]->val . ' & ' . $_[1]->val) }, |
| 1399 | "^=" => sub { bit->new($_[0]->val . ' ^ ' . $_[1]->val) }, |
| 1400 | "|" => sub { bit->new($_[0]->val . ' | ' . $_[1]->val) }, # |= by fallback |
| 1401 | ; |
| 1402 | |
| 1403 | sub val { ${$_[0]} } |
| 1404 | |
| 1405 | package main; |
| 1406 | |
| 1407 | my $a = bit->new(my $va = 'a'); |
| 1408 | my $b = bit->new(my $vb = 'b'); |
| 1409 | |
| 1410 | $a &= $b; |
| 1411 | is($a->val, 'a & b', "overloaded &= works"); |
| 1412 | |
| 1413 | my $c = bit->new(my $vc = 'c'); |
| 1414 | |
| 1415 | $b ^= $c; |
| 1416 | is($b->val, 'b ^ c', "overloaded ^= works"); |
| 1417 | |
| 1418 | my $d = bit->new(my $vd = 'd'); |
| 1419 | |
| 1420 | $c |= $d; |
| 1421 | is($c->val, 'c | d', "overloaded |= (by fallback) works"); |
| 1422 | } |
| 1423 | |
| 1424 | { |
| 1425 | # comparison operators with nomethod (bug 41546) |
| 1426 | my $warning = ""; |
| 1427 | my $method; |
| 1428 | |
| 1429 | package nomethod_false; |
| 1430 | use overload nomethod => sub { $method = 'nomethod'; 0 }; |
| 1431 | |
| 1432 | package nomethod_true; |
| 1433 | use overload nomethod => sub { $method= 'nomethod'; 'true' }; |
| 1434 | |
| 1435 | package main; |
| 1436 | local $^W = 1; |
| 1437 | local $SIG{__WARN__} = sub { $warning = $_[0] }; |
| 1438 | |
| 1439 | my $f = bless [], 'nomethod_false'; |
| 1440 | ($warning, $method) = ("", ""); |
| 1441 | is($f eq 'whatever', 0, 'nomethod makes eq return 0'); |
| 1442 | is($method, 'nomethod'); |
| 1443 | |
| 1444 | my $t = bless [], 'nomethod_true'; |
| 1445 | ($warning, $method) = ("", ""); |
| 1446 | is($t eq 'whatever', 'true', 'nomethod makes eq return "true"'); |
| 1447 | is($method, 'nomethod'); |
| 1448 | is($warning, "", 'nomethod eq need not return number'); |
| 1449 | |
| 1450 | eval q{ |
| 1451 | package nomethod_false; |
| 1452 | use overload cmp => sub { $method = 'cmp'; 0 }; |
| 1453 | }; |
| 1454 | $f = bless [], 'nomethod_false'; |
| 1455 | ($warning, $method) = ("", ""); |
| 1456 | ok($f eq 'whatever', 'eq falls back to cmp (nomethod not called)'); |
| 1457 | is($method, 'cmp'); |
| 1458 | |
| 1459 | eval q{ |
| 1460 | package nomethod_true; |
| 1461 | use overload cmp => sub { $method = 'cmp'; 'true' }; |
| 1462 | }; |
| 1463 | $t = bless [], 'nomethod_true'; |
| 1464 | ($warning, $method) = ("", ""); |
| 1465 | ok($t eq 'whatever', 'eq falls back to cmp (nomethod not called)'); |
| 1466 | is($method, 'cmp'); |
| 1467 | like($warning, qr/isn't numeric/, 'cmp should return number'); |
| 1468 | |
| 1469 | } |
| 1470 | |
| 1471 | { |
| 1472 | # nomethod called for '!' after attempted fallback |
| 1473 | my $nomethod_called = 0; |
| 1474 | |
| 1475 | package nomethod_not; |
| 1476 | use overload nomethod => sub { $nomethod_called = 'yes'; }; |
| 1477 | |
| 1478 | package main; |
| 1479 | my $o = bless [], 'nomethod_not'; |
| 1480 | my $res = ! $o; |
| 1481 | |
| 1482 | is($nomethod_called, 'yes', "nomethod() is called for '!'"); |
| 1483 | is($res, 'yes', "nomethod(..., '!') return value propagates"); |
| 1484 | } |
| 1485 | |
| 1486 | { |
| 1487 | # Subtle bug pre 5.10, as a side effect of the overloading flag being |
| 1488 | # stored on the reference rather than the referent. Despite the fact that |
| 1489 | # objects can only be accessed via references (even internally), the |
| 1490 | # referent actually knows that it's blessed, not the references. So taking |
| 1491 | # a new, unrelated, reference to it gives an object. However, the |
| 1492 | # overloading-or-not flag was on the reference prior to 5.10, and taking |
| 1493 | # a new reference didn't (use to) copy it. |
| 1494 | |
| 1495 | package kayo; |
| 1496 | |
| 1497 | use overload '""' => sub {${$_[0]}}; |
| 1498 | |
| 1499 | sub Pie { |
| 1500 | return "$_[0], $_[1]"; |
| 1501 | } |
| 1502 | |
| 1503 | package main; |
| 1504 | |
| 1505 | my $class = 'kayo'; |
| 1506 | my $string = 'bam'; |
| 1507 | my $crunch_eth = bless \$string, $class; |
| 1508 | |
| 1509 | is("$crunch_eth", $string); |
| 1510 | is ($crunch_eth->Pie("Meat"), "$string, Meat"); |
| 1511 | |
| 1512 | my $wham_eth = \$string; |
| 1513 | |
| 1514 | is("$wham_eth", $string, |
| 1515 | 'This reference did not have overloading in 5.8.8 and earlier'); |
| 1516 | is ($crunch_eth->Pie("Apple"), "$string, Apple"); |
| 1517 | |
| 1518 | my $class = ref $wham_eth; |
| 1519 | $class =~ s/=.*//; |
| 1520 | |
| 1521 | # Bless it back into its own class! |
| 1522 | bless $wham_eth, $class; |
| 1523 | |
| 1524 | is("$wham_eth", $string); |
| 1525 | is ($crunch_eth->Pie("Blackbird"), "$string, Blackbird"); |
| 1526 | } |
| 1527 | |
| 1528 | { |
| 1529 | package numify_int; |
| 1530 | use overload "0+" => sub { $_[0][0] += 1; 42 }; |
| 1531 | package numify_self; |
| 1532 | use overload "0+" => sub { $_[0][0]++; $_[0] }; |
| 1533 | package numify_other; |
| 1534 | use overload "0+" => sub { $_[0][0]++; $_[0][1] = bless [], 'numify_int' }; |
| 1535 | package numify_by_fallback; |
| 1536 | use overload fallback => 1; |
| 1537 | |
| 1538 | package main; |
| 1539 | my $o = bless [], 'numify_int'; |
| 1540 | is(int($o), 42, 'numifies to integer'); |
| 1541 | is($o->[0], 1, 'int() numifies only once'); |
| 1542 | |
| 1543 | my $aref = []; |
| 1544 | my $num_val = int($aref); |
| 1545 | my $r = bless $aref, 'numify_self'; |
| 1546 | is(int($r), $num_val, 'numifies to self'); |
| 1547 | is($r->[0], 1, 'int() numifies once when returning self'); |
| 1548 | |
| 1549 | my $s = bless [], 'numify_other'; |
| 1550 | is(int($s), 42, 'numifies to numification of other object'); |
| 1551 | is($s->[0], 1, 'int() numifies once when returning other object'); |
| 1552 | is($s->[1][0], 1, 'returned object numifies too'); |
| 1553 | |
| 1554 | my $m = bless $aref, 'numify_by_fallback'; |
| 1555 | is(int($m), $num_val, 'numifies to usual reference value'); |
| 1556 | is(abs($m), $num_val, 'numifies to usual reference value'); |
| 1557 | is(-$m, -$num_val, 'numifies to usual reference value'); |
| 1558 | is(0+$m, $num_val, 'numifies to usual reference value'); |
| 1559 | is($m+0, $num_val, 'numifies to usual reference value'); |
| 1560 | is($m+$m, 2*$num_val, 'numifies to usual reference value'); |
| 1561 | is(0-$m, -$num_val, 'numifies to usual reference value'); |
| 1562 | is(1*$m, $num_val, 'numifies to usual reference value'); |
| 1563 | is(int($m/1), $num_val, 'numifies to usual reference value'); |
| 1564 | is($m%100, $num_val%100, 'numifies to usual reference value'); |
| 1565 | is($m**1, $num_val, 'numifies to usual reference value'); |
| 1566 | |
| 1567 | is(abs($aref), $num_val, 'abs() of ref'); |
| 1568 | is(-$aref, -$num_val, 'negative of ref'); |
| 1569 | is(0+$aref, $num_val, 'ref addition'); |
| 1570 | is($aref+0, $num_val, 'ref addition'); |
| 1571 | is($aref+$aref, 2*$num_val, 'ref addition'); |
| 1572 | is(0-$aref, -$num_val, 'subtraction of ref'); |
| 1573 | is(1*$aref, $num_val, 'multiplicaton of ref'); |
| 1574 | is(int($aref/1), $num_val, 'division of ref'); |
| 1575 | is($aref%100, $num_val%100, 'modulo of ref'); |
| 1576 | is($aref**1, $num_val, 'exponentiation of ref'); |
| 1577 | } |
| 1578 | |
| 1579 | { |
| 1580 | package CopyConstructorFallback; |
| 1581 | use overload |
| 1582 | '++' => sub { "$_[0]"; $_[0] }, |
| 1583 | fallback => 1; |
| 1584 | sub new { bless {} => shift } |
| 1585 | |
| 1586 | package main; |
| 1587 | |
| 1588 | my $o = CopyConstructorFallback->new; |
| 1589 | my $x = $o++; # would segfault |
| 1590 | my $y = ++$o; |
| 1591 | is($x, $o, "copy constructor falls back to assignment (postinc)"); |
| 1592 | is($y, $o, "copy constructor falls back to assignment (preinc)"); |
| 1593 | } |
| 1594 | |
| 1595 | # only scalar 'x' should currently overload |
| 1596 | |
| 1597 | { |
| 1598 | package REPEAT; |
| 1599 | |
| 1600 | my ($x,$n, $nm); |
| 1601 | |
| 1602 | use overload |
| 1603 | 'x' => sub { $x++; 1 }, |
| 1604 | '0+' => sub { $n++; 1 }, |
| 1605 | 'nomethod' => sub { $nm++; 1 }, |
| 1606 | 'fallback' => 0, |
| 1607 | ; |
| 1608 | |
| 1609 | my $s = bless {}; |
| 1610 | |
| 1611 | package main; |
| 1612 | |
| 1613 | my @a; |
| 1614 | my $count = 3; |
| 1615 | |
| 1616 | ($x,$n,$nm) = (0,0,0); |
| 1617 | @a = ((1,2,$s) x $count); |
| 1618 | is("$x-$n-$nm", "0-0-0", 'repeat 1'); |
| 1619 | |
| 1620 | ($x,$n,$nm) = (0,0,0); |
| 1621 | @a = ((1,$s,3) x $count); |
| 1622 | is("$x-$n-$nm", "0-0-0", 'repeat 2'); |
| 1623 | |
| 1624 | ($x,$n,$nm) = (0,0,0); |
| 1625 | @a = ((1,2,3) x $s); |
| 1626 | is("$x-$n-$nm", "0-1-0", 'repeat 3'); |
| 1627 | } |
| 1628 | |
| 1629 | |
| 1630 | |
| 1631 | # RT #57012: magic items need to have mg_get() called before testing for |
| 1632 | # overload. Lack of this means that overloaded values returned by eg a |
| 1633 | # tied array didn't call overload methods. |
| 1634 | # We test here both a tied array and scalar, since the implementation of |
| 1635 | # tied arrays (and hashes) is such that in rvalue context, mg_get is |
| 1636 | # called prior to executing the op, while it isn't for a tied scalar. |
| 1637 | # We also check that return values are correctly tainted. |
| 1638 | # We try against two overload packages; one has all expected methods, the |
| 1639 | # other uses only fallback methods. |
| 1640 | |
| 1641 | { |
| 1642 | |
| 1643 | # @tests holds a list of test cases. Each elem is an array ref with |
| 1644 | # the following entries: |
| 1645 | # |
| 1646 | # * the value that the overload method should return |
| 1647 | # |
| 1648 | # * the expression to be evaled. %s is replaced with the |
| 1649 | # variable being tested ($ta[0], $ts, or $plain) |
| 1650 | # |
| 1651 | # * a string listing what functions we expect to be called. |
| 1652 | # Each method appends its name in parentheses, so "(=)(+)" means |
| 1653 | # we expect the copy constructor and then the add method to be |
| 1654 | # called. |
| 1655 | # |
| 1656 | # * like above, but what should be called for the fallback-only test |
| 1657 | # (in this case, nomethod() identifies itself as "(NM:*)" where * |
| 1658 | # is the op). If this value is undef, fallback tests are skipped. |
| 1659 | # |
| 1660 | # * An array ref of expected counts of calls to FETCH/STORE. |
| 1661 | # The first three values are: |
| 1662 | # 1. the expected number of FETCHs for a tied array |
| 1663 | # 2. the expected number of FETCHs for a tied scalar |
| 1664 | # 3. the expected number of STOREs |
| 1665 | # If there are a further three elements present, then |
| 1666 | # these represent the expected counts for the fallback |
| 1667 | # version of the tests. If absent, they are assumed to |
| 1668 | # be the same as for the full method test |
| 1669 | # |
| 1670 | # * Under the taint version of the tests, whether we expect |
| 1671 | # the result to be tainted (for example comparison ops |
| 1672 | # like '==' don't return a tainted value, even if their |
| 1673 | # args are. |
| 1674 | my @tests; |
| 1675 | |
| 1676 | my %subs; |
| 1677 | my $funcs; |
| 1678 | my $use_int; |
| 1679 | |
| 1680 | BEGIN { |
| 1681 | # A note on what methods to expect to be called, and |
| 1682 | # how many times FETCH/STORE is called: |
| 1683 | # |
| 1684 | # Mutating ops (+=, ++ etc) trigger a copy ('='), since |
| 1685 | # the code can't distingish between something that's been copied: |
| 1686 | # $a = foo->new(0); $b = $a; refcnt($$b) == 2 |
| 1687 | # and overloaded objects stored in ties which will have extra |
| 1688 | # refcounts due to the tied_obj magic and entries on the tmps |
| 1689 | # stack when returning from FETCH etc. So we always copy. |
| 1690 | |
| 1691 | # This accounts for a '=', and an extra STORE. |
| 1692 | # We also have a FETCH returning the final value from the eval, |
| 1693 | # plus a FETCH in the overload subs themselves: ($_[0][0]) |
| 1694 | # triggers one. However, tied agregates have a mechanism to prevent |
| 1695 | # multiple fetches between STOREs, which means that the tied |
| 1696 | # hash skips doing a FETCH during '='. |
| 1697 | |
| 1698 | for (qw(+ - * / % ** << >> & | ^)) { |
| 1699 | my $op = $_; |
| 1700 | $op = '%%' if $op eq '%'; |
| 1701 | my $e = "%s $op= 3"; |
| 1702 | $subs{"$_="} = $e; |
| 1703 | # ARRAY FETCH: initial, sub+=, eval-return, |
| 1704 | # SCALAR FETCH: initial, sub=, sub+=, eval-return, |
| 1705 | # STORE: copy, mutator |
| 1706 | push @tests, [ 18, $e, "(=)($_=)", "(=)(NM:$_=)", [ 3, 4, 2 ], 1 ]; |
| 1707 | |
| 1708 | $subs{$_} = |
| 1709 | "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }"; |
| 1710 | # ARRAY FETCH: initial |
| 1711 | # SCALAR FETCH: initial eval-return, |
| 1712 | push @tests, [ 18, "%s $op 3", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1713 | push @tests, [ 18, "3 $op %s", "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1714 | } |
| 1715 | |
| 1716 | # these use string fallback rather than nomethod |
| 1717 | for (qw(x .)) { |
| 1718 | my $op = $_; |
| 1719 | my $e = "%s $op= 3"; |
| 1720 | $subs{"$_="} = $e; |
| 1721 | # For normal case: |
| 1722 | # ARRAY FETCH: initial, sub+=, eval-return, |
| 1723 | # SCALAR FETCH: initial, sub=, sub+=, eval-return, |
| 1724 | # STORE: copy, mutator |
| 1725 | # for fallback, we just stringify, so eval-return and copy skipped |
| 1726 | |
| 1727 | push @tests, [ 18, $e, "(=)($_=)", '("")', |
| 1728 | [ 3, 4, 2, 2, 3, 1 ], 1 ]; |
| 1729 | |
| 1730 | $subs{$_} = |
| 1731 | "do { my \$arg = %s; \$_[2] ? (3 $op \$arg) : (\$arg $op 3) }"; |
| 1732 | # ARRAY FETCH: initial |
| 1733 | # SCALAR FETCH: initial eval-return, |
| 1734 | # with fallback, we just stringify, so eval-return skipped, |
| 1735 | # but an extra FETCH happens in sub"", except for 'x', |
| 1736 | # which passes a copy of the RV to sub"", avoiding the |
| 1737 | # second FETCH |
| 1738 | |
| 1739 | push @tests, [ 18, "%s $op 3", "($_)", '("")', |
| 1740 | [ 1, 2, 0, 1, ($_ eq '.' ? 2 : 1), 0 ], 1 ]; |
| 1741 | next if $_ eq 'x'; # repeat only overloads on LHS |
| 1742 | push @tests, [ 18, "3 $op %s", "($_)", '("")', |
| 1743 | [ 1, 2, 0, 1, 2, 0 ], 1 ]; |
| 1744 | } |
| 1745 | |
| 1746 | for (qw(++ --)) { |
| 1747 | my $pre = "$_%s"; |
| 1748 | my $post = "%s$_"; |
| 1749 | $subs{$_} = $pre; |
| 1750 | push @tests, |
| 1751 | # ARRAY FETCH: initial, sub+=, eval-return, |
| 1752 | # SCALAR FETCH: initial, sub=, sub+=, eval-return, |
| 1753 | # STORE: copy, mutator |
| 1754 | [ 18, $pre, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 3, 4, 2 ], 1 ], |
| 1755 | # ARRAY FETCH: initial, sub+= |
| 1756 | # SCALAR FETCH: initial, sub=, sub+= |
| 1757 | # STORE: copy, mutator |
| 1758 | [ 18, $post, "(=)($_)(\"\")", "(=)(NM:$_)(\"\")", [ 2, 3, 2 ], 1 ]; |
| 1759 | } |
| 1760 | |
| 1761 | # For the non-mutator ops, we have a initial FETCH, |
| 1762 | # an extra FETCH within the sub itself for the scalar option, |
| 1763 | # and no STOREs |
| 1764 | |
| 1765 | for (qw(< <= > >= == != lt le gt ge eq ne)) { |
| 1766 | my $e = "%s $_ 3"; |
| 1767 | $subs{$_} = $e; |
| 1768 | push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 0 ]; |
| 1769 | } |
| 1770 | for (qw(<=> cmp)) { |
| 1771 | my $e = "%s $_ 3"; |
| 1772 | $subs{$_} = $e; |
| 1773 | push @tests, [ 3, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1774 | } |
| 1775 | for (qw(atan2)) { |
| 1776 | my $e = "$_ %s, 3"; |
| 1777 | $subs{$_} = $e; |
| 1778 | push @tests, [ 18, $e, "($_)", "(NM:$_)", [ 1, 2, 0 ], 1 ]; |
| 1779 | } |
| 1780 | for (qw(cos sin exp abs log sqrt int ~)) { |
| 1781 | my $e = "$_(%s)"; |
| 1782 | $subs{$_} = $e; |
| 1783 | push @tests, [ 1.23, $e, "($_)", |
| 1784 | ($_ eq 'int' ? '(0+)' : "(NM:$_)") , [ 1, 2, 0 ], 1 ]; |
| 1785 | } |
| 1786 | for (qw(!)) { |
| 1787 | my $e = "$_(%s)"; |
| 1788 | $subs{$_} = $e; |
| 1789 | push @tests, [ 1.23, $e, "($_)", '(0+)', [ 1, 2, 0 ], 0 ]; |
| 1790 | } |
| 1791 | for (qw(-)) { |
| 1792 | my $e = "$_(%s)"; |
| 1793 | $subs{neg} = $e; |
| 1794 | push @tests, [ 18, $e, '(neg)', '(NM:neg)', [ 1, 2, 0 ], 1 ]; |
| 1795 | } |
| 1796 | my $e = '(%s) ? 1 : 0'; |
| 1797 | $subs{bool} = $e; |
| 1798 | push @tests, [ 18, $e, '(bool)', '(0+)', [ 1, 2, 0 ], 0 ]; |
| 1799 | |
| 1800 | # note: this is testing unary qr, not binary =~ |
| 1801 | $subs{qr} = '(qr/%s/)'; |
| 1802 | push @tests, [ "abc", '"abc" =~ (%s)', '(qr)', '("")', [ 1, 2, 0 ], 0 ]; |
| 1803 | |
| 1804 | $e = '"abc" ~~ (%s)'; |
| 1805 | $subs{'~~'} = $e; |
| 1806 | push @tests, [ "abc", $e, '(~~)', '(NM:~~)', [ 1, 1, 0 ], 0 ]; |
| 1807 | |
| 1808 | $subs{'-X'} = 'do { my $f = (%s);' |
| 1809 | . '$_[1] eq "r" ? (-r ($f)) :' |
| 1810 | . '$_[1] eq "e" ? (-e ($f)) :' |
| 1811 | . '$_[1] eq "f" ? (-f ($f)) :' |
| 1812 | . '$_[1] eq "l" ? (-l ($f)) :' |
| 1813 | . '$_[1] eq "t" ? (-t ($f)) :' |
| 1814 | . '$_[1] eq "T" ? (-T ($f)) : 0;}'; |
| 1815 | # Note - we don't care what these filetests return, as |
| 1816 | # long as the tied and untied versions return the same value. |
| 1817 | # The flags below are chosen to test all uses of tryAMAGICftest_MG |
| 1818 | for (qw(r e f l t T)) { |
| 1819 | push @tests, [ 'TEST', "-$_ (%s)", '(-X)', '("")', [ 1, 2, 0 ], 0 ]; |
| 1820 | } |
| 1821 | |
| 1822 | $subs{'${}'} = '%s'; |
| 1823 | push @tests, [ do {my $s=99; \$s}, '${%s}', '(${})', undef, [ 1, 1, 0 ], 0 ]; |
| 1824 | |
| 1825 | # we skip testing '@{}' here because too much of this test |
| 1826 | # framework involves array dereferences! |
| 1827 | |
| 1828 | $subs{'%{}'} = '%s'; |
| 1829 | push @tests, [ {qw(a 1 b 2 c 3)}, 'join "", sort keys %%{%s}', |
| 1830 | '(%{})', undef, [ 1, 2, 0 ], 0 ]; |
| 1831 | |
| 1832 | $subs{'&{}'} = '%s'; |
| 1833 | push @tests, [ sub {99}, 'do {&{%s} for 1,2}', |
| 1834 | '(&{})(&{})', undef, [ 2, 2, 0 ], 0 ]; |
| 1835 | |
| 1836 | our $RT57012A = 88; |
| 1837 | our $RT57012B; |
| 1838 | $subs{'*{}'} = '%s'; |
| 1839 | push @tests, [ \*RT57012A, '*RT57012B = *{%s}; our $RT57012B', |
| 1840 | '(*{})', undef, [ 1, 1, 0 ], 0 ]; |
| 1841 | |
| 1842 | # XXX TODO: '<>' |
| 1843 | |
| 1844 | # eval should do tie, overload on its arg before checking taint */ |
| 1845 | push @tests, [ '1;', 'eval q(eval %s); $@ =~ /Insecure/', |
| 1846 | '("")', '("")', [ 1, 2, 0 ], 0 ]; |
| 1847 | |
| 1848 | |
| 1849 | for my $sub (keys %subs) { |
| 1850 | my $term = $subs{$sub}; |
| 1851 | my $t = sprintf $term, '$_[0][0]'; |
| 1852 | my $e ="sub { \$funcs .= '($sub)'; my \$r; if (\$use_int) {" |
| 1853 | . "use integer; \$r = ($t) } else { \$r = ($t) } \$r }"; |
| 1854 | $subs{$sub} = eval $e; |
| 1855 | die "Compiling sub gave error:\n<$e>\n<$@>\n" if $@; |
| 1856 | } |
| 1857 | } |
| 1858 | |
| 1859 | my $fetches; |
| 1860 | my $stores; |
| 1861 | |
| 1862 | package RT57012_OV; |
| 1863 | |
| 1864 | use overload |
| 1865 | %subs, |
| 1866 | "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] }, |
| 1867 | '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] }, |
| 1868 | '""' => sub { $funcs .= '("")'; "$_[0][0]" }, |
| 1869 | ; |
| 1870 | |
| 1871 | package RT57012_OV_FB; # only contains fallback conversion functions |
| 1872 | |
| 1873 | use overload |
| 1874 | "=" => sub { $funcs .= '(=)'; bless [ $_[0][0] ] }, |
| 1875 | '0+' => sub { $funcs .= '(0+)'; 0 + $_[0][0] }, |
| 1876 | '""' => sub { $funcs .= '("")'; "$_[0][0]" }, |
| 1877 | "nomethod" => sub { |
| 1878 | $funcs .= "(NM:$_[3])"; |
| 1879 | my $e = defined($_[1]) |
| 1880 | ? $_[3] eq 'atan2' |
| 1881 | ? $_[2] |
| 1882 | ? "atan2(\$_[1],\$_[0][0])" |
| 1883 | : "atan2(\$_[0][0],\$_[1])" |
| 1884 | : $_[2] |
| 1885 | ? "\$_[1] $_[3] \$_[0][0]" |
| 1886 | : "\$_[0][0] $_[3] \$_[1]" |
| 1887 | : $_[3] eq 'neg' |
| 1888 | ? "-\$_[0][0]" |
| 1889 | : "$_[3](\$_[0][0])"; |
| 1890 | my $r; |
| 1891 | if ($use_int) { |
| 1892 | use integer; $r = eval $e; |
| 1893 | } |
| 1894 | else { |
| 1895 | $r = eval $e; |
| 1896 | } |
| 1897 | ::diag("eval of nomethod <$e> gave <$@>") if $@; |
| 1898 | $r; |
| 1899 | } |
| 1900 | |
| 1901 | ; |
| 1902 | |
| 1903 | package RT57012_TIE_S; |
| 1904 | |
| 1905 | my $tie_val; |
| 1906 | sub TIESCALAR { bless [ bless [ $tie_val ], $_[1] ] } |
| 1907 | sub FETCH { $fetches++; $_[0][0] } |
| 1908 | sub STORE { $stores++; $_[0][0] = $_[1] } |
| 1909 | |
| 1910 | package RT57012_TIE_A; |
| 1911 | |
| 1912 | sub TIEARRAY { bless [] } |
| 1913 | sub FETCH { $fetches++; $_[0][0] } |
| 1914 | sub STORE { $stores++; $_[0][$_[1]] = $_[2] } |
| 1915 | |
| 1916 | package main; |
| 1917 | |
| 1918 | for my $test (@tests) { |
| 1919 | my ($val, $sub_term, $exp_funcs, $exp_fb_funcs, |
| 1920 | $exp_counts, $exp_taint) = @$test; |
| 1921 | |
| 1922 | my $tainted_val; |
| 1923 | { |
| 1924 | # create tainted version of $val (unless its a ref) |
| 1925 | my $t = substr($^X,0,0); |
| 1926 | my $t0 = $t."0"; |
| 1927 | my $val1 = $val; # use a copy to avoid stringifying original |
| 1928 | $tainted_val = ref($val1) ? $val : |
| 1929 | ($val1 =~ /^[\d\.]+$/) ? $val+$t0 : $val.$t; |
| 1930 | } |
| 1931 | $tie_val = $tainted_val; |
| 1932 | |
| 1933 | for my $int ('', 'use integer; ') { |
| 1934 | $use_int = ($int ne ''); |
| 1935 | my $plain = $tainted_val; |
| 1936 | my $plain_term = $int . sprintf $sub_term, '$plain'; |
| 1937 | my $exp = eval $plain_term; |
| 1938 | diag("eval of plain_term <$plain_term> gave <$@>") if $@; |
| 1939 | is(tainted($exp), $exp_taint, |
| 1940 | "<$plain_term> taint of expected return"); |
| 1941 | |
| 1942 | for my $ov_pkg (qw(RT57012_OV RT57012_OV_FB)) { |
| 1943 | # the deref ops don't support fallback |
| 1944 | next if $ov_pkg eq 'RT57012_OV_FB' |
| 1945 | and not defined $exp_fb_funcs; |
| 1946 | my ($exp_fetch_a, $exp_fetch_s, $exp_store) = |
| 1947 | ($ov_pkg eq 'RT57012_OV' || @$exp_counts < 4) |
| 1948 | ? @$exp_counts[0,1,2] |
| 1949 | : @$exp_counts[3,4,5]; |
| 1950 | |
| 1951 | tie my $ts, 'RT57012_TIE_S', $ov_pkg; |
| 1952 | tie my @ta, 'RT57012_TIE_A'; |
| 1953 | $ta[0] = bless [ $tainted_val ], $ov_pkg; |
| 1954 | my $oload = bless [ $tainted_val ], $ov_pkg; |
| 1955 | |
| 1956 | for my $var ('$ta[0]', '$ts', '$oload') { |
| 1957 | |
| 1958 | $funcs = ''; |
| 1959 | $fetches = 0; |
| 1960 | $stores = 0; |
| 1961 | |
| 1962 | my $res_term = $int . sprintf $sub_term, $var; |
| 1963 | my $desc = "<$res_term> $ov_pkg" ; |
| 1964 | my $res = eval $res_term; |
| 1965 | diag("eval of res_term $desc gave <$@>") if $@; |
| 1966 | # uniquely, the inc/dec ops return tthe original |
| 1967 | # ref rather than a copy, so stringify it to |
| 1968 | # find out if its tainted |
| 1969 | $res = "$res" if $res_term =~ /\+\+|--/; |
| 1970 | is(tainted($res), $exp_taint, |
| 1971 | "$desc taint of result return"); |
| 1972 | is($res, $exp, "$desc return value"); |
| 1973 | my $fns =($ov_pkg eq 'RT57012_OV_FB') |
| 1974 | ? $exp_fb_funcs : $exp_funcs; |
| 1975 | if ($var eq '$oload' && $res_term !~ /oload(\+\+|--)/) { |
| 1976 | # non-tied overloading doesn't trigger a copy |
| 1977 | # except for post inc/dec |
| 1978 | $fns =~ s/^\(=\)//; |
| 1979 | } |
| 1980 | is($funcs, $fns, "$desc methods called"); |
| 1981 | next if $var eq '$oload'; |
| 1982 | my $exp_fetch = ($var eq '$ts') ? |
| 1983 | $exp_fetch_s : $exp_fetch_a; |
| 1984 | is($fetches, $exp_fetch, "$desc FETCH count"); |
| 1985 | is($stores, $exp_store, "$desc STORE count"); |
| 1986 | |
| 1987 | } |
| 1988 | |
| 1989 | } |
| 1990 | } |
| 1991 | } |
| 1992 | } |
| 1993 | |
| 1994 | # Test overload from the main package |
| 1995 | fresh_perl_is |
| 1996 | '$^W = 1; use overload q\""\ => sub {"ning"}; print bless []', |
| 1997 | 'ning', |
| 1998 | { switches => ['-wl'], stderr => 1 }, |
| 1999 | 'use overload from the main package' |
| 2000 | ; |
| 2001 | |
| 2002 | { |
| 2003 | package blessed_methods; |
| 2004 | use overload '+' => sub {}; |
| 2005 | bless overload::Method __PACKAGE__,'+'; |
| 2006 | eval { overload::Method __PACKAGE__,'+' }; |
| 2007 | ::is($@, '', 'overload::Method and blessed overload methods'); |
| 2008 | } |
| 2009 | |
| 2010 | # EOF |