| 1 | #!./perl |
| 2 | |
| 3 | BEGIN { |
| 4 | chdir 't' if -d 't'; |
| 5 | @INC = '../lib'; |
| 6 | require './test.pl'; |
| 7 | } |
| 8 | |
| 9 | use strict; |
| 10 | use warnings; |
| 11 | |
| 12 | plan tests => 201; |
| 13 | |
| 14 | # The behaviour of the feature pragma should be tested by lib/feature.t |
| 15 | # using the tests in t/lib/feature/*. This file tests the behaviour of |
| 16 | # the switch ops themselves. |
| 17 | |
| 18 | |
| 19 | # Before loading feature, test the switch ops with CORE:: |
| 20 | CORE::given(3) { |
| 21 | CORE::when(3) { pass "CORE::given and CORE::when"; continue } |
| 22 | CORE::default { pass "continue (without feature) and CORE::default" } |
| 23 | } |
| 24 | |
| 25 | |
| 26 | use feature 'switch'; |
| 27 | |
| 28 | eval { continue }; |
| 29 | like($@, qr/^Can't "continue" outside/, "continue outside"); |
| 30 | |
| 31 | eval { break }; |
| 32 | like($@, qr/^Can't "break" outside/, "break outside"); |
| 33 | |
| 34 | # Scoping rules |
| 35 | |
| 36 | { |
| 37 | my $x = "foo"; |
| 38 | given(my $x = "bar") { |
| 39 | is($x, "bar", "given scope starts"); |
| 40 | } |
| 41 | is($x, "foo", "given scope ends"); |
| 42 | } |
| 43 | |
| 44 | sub be_true {1} |
| 45 | |
| 46 | given(my $x = "foo") { |
| 47 | when(be_true(my $x = "bar")) { |
| 48 | is($x, "bar", "given scope starts"); |
| 49 | } |
| 50 | is($x, "foo", "given scope ends"); |
| 51 | } |
| 52 | |
| 53 | $_ = "outside"; |
| 54 | given("inside") { check_outside1() } |
| 55 | sub check_outside1 { is($_, "inside", "\$_ is not lexically scoped") } |
| 56 | |
| 57 | { |
| 58 | my $_ = "outside"; |
| 59 | given("inside") { check_outside2() } |
| 60 | sub check_outside2 { |
| 61 | is($_, "outside", "\$_ lexically scoped (lexical \$_)") |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | # Basic string/numeric comparisons and control flow |
| 66 | |
| 67 | { |
| 68 | my $ok; |
| 69 | given(3) { |
| 70 | when(2) { $ok = 'two'; } |
| 71 | when(3) { $ok = 'three'; } |
| 72 | when(4) { $ok = 'four'; } |
| 73 | default { $ok = 'd'; } |
| 74 | } |
| 75 | is($ok, 'three', "numeric comparison"); |
| 76 | } |
| 77 | |
| 78 | { |
| 79 | my $ok; |
| 80 | use integer; |
| 81 | given(3.14159265) { |
| 82 | when(2) { $ok = 'two'; } |
| 83 | when(3) { $ok = 'three'; } |
| 84 | when(4) { $ok = 'four'; } |
| 85 | default { $ok = 'd'; } |
| 86 | } |
| 87 | is($ok, 'three', "integer comparison"); |
| 88 | } |
| 89 | |
| 90 | { |
| 91 | my ($ok1, $ok2); |
| 92 | given(3) { |
| 93 | when(3.1) { $ok1 = 'n'; } |
| 94 | when(3.0) { $ok1 = 'y'; continue } |
| 95 | when("3.0") { $ok2 = 'y'; } |
| 96 | default { $ok2 = 'n'; } |
| 97 | } |
| 98 | is($ok1, 'y', "more numeric (pt. 1)"); |
| 99 | is($ok2, 'y', "more numeric (pt. 2)"); |
| 100 | } |
| 101 | |
| 102 | { |
| 103 | my $ok; |
| 104 | given("c") { |
| 105 | when("b") { $ok = 'B'; } |
| 106 | when("c") { $ok = 'C'; } |
| 107 | when("d") { $ok = 'D'; } |
| 108 | default { $ok = 'def'; } |
| 109 | } |
| 110 | is($ok, 'C', "string comparison"); |
| 111 | } |
| 112 | |
| 113 | { |
| 114 | my $ok; |
| 115 | given("c") { |
| 116 | when("b") { $ok = 'B'; } |
| 117 | when("c") { $ok = 'C'; continue } |
| 118 | when("c") { $ok = 'CC'; } |
| 119 | default { $ok = 'D'; } |
| 120 | } |
| 121 | is($ok, 'CC', "simple continue"); |
| 122 | } |
| 123 | |
| 124 | # Definedness |
| 125 | { |
| 126 | my $ok = 1; |
| 127 | given (0) { when(undef) {$ok = 0} } |
| 128 | is($ok, 1, "Given(0) when(undef)"); |
| 129 | } |
| 130 | { |
| 131 | my $undef; |
| 132 | my $ok = 1; |
| 133 | given (0) { when($undef) {$ok = 0} } |
| 134 | is($ok, 1, 'Given(0) when($undef)'); |
| 135 | } |
| 136 | { |
| 137 | my $undef; |
| 138 | my $ok = 0; |
| 139 | given (0) { when($undef++) {$ok = 1} } |
| 140 | is($ok, 1, "Given(0) when($undef++)"); |
| 141 | } |
| 142 | { |
| 143 | no warnings "uninitialized"; |
| 144 | my $ok = 1; |
| 145 | given (undef) { when(0) {$ok = 0} } |
| 146 | is($ok, 1, "Given(undef) when(0)"); |
| 147 | } |
| 148 | { |
| 149 | no warnings "uninitialized"; |
| 150 | my $undef; |
| 151 | my $ok = 1; |
| 152 | given ($undef) { when(0) {$ok = 0} } |
| 153 | is($ok, 1, 'Given($undef) when(0)'); |
| 154 | } |
| 155 | ######## |
| 156 | { |
| 157 | my $ok = 1; |
| 158 | given ("") { when(undef) {$ok = 0} } |
| 159 | is($ok, 1, 'Given("") when(undef)'); |
| 160 | } |
| 161 | { |
| 162 | my $undef; |
| 163 | my $ok = 1; |
| 164 | given ("") { when($undef) {$ok = 0} } |
| 165 | is($ok, 1, 'Given("") when($undef)'); |
| 166 | } |
| 167 | { |
| 168 | no warnings "uninitialized"; |
| 169 | my $ok = 1; |
| 170 | given (undef) { when("") {$ok = 0} } |
| 171 | is($ok, 1, 'Given(undef) when("")'); |
| 172 | } |
| 173 | { |
| 174 | no warnings "uninitialized"; |
| 175 | my $undef; |
| 176 | my $ok = 1; |
| 177 | given ($undef) { when("") {$ok = 0} } |
| 178 | is($ok, 1, 'Given($undef) when("")'); |
| 179 | } |
| 180 | ######## |
| 181 | { |
| 182 | my $ok = 0; |
| 183 | given (undef) { when(undef) {$ok = 1} } |
| 184 | is($ok, 1, "Given(undef) when(undef)"); |
| 185 | } |
| 186 | { |
| 187 | my $undef; |
| 188 | my $ok = 0; |
| 189 | given (undef) { when($undef) {$ok = 1} } |
| 190 | is($ok, 1, 'Given(undef) when($undef)'); |
| 191 | } |
| 192 | { |
| 193 | my $undef; |
| 194 | my $ok = 0; |
| 195 | given ($undef) { when(undef) {$ok = 1} } |
| 196 | is($ok, 1, 'Given($undef) when(undef)'); |
| 197 | } |
| 198 | { |
| 199 | my $undef; |
| 200 | my $ok = 0; |
| 201 | given ($undef) { when($undef) {$ok = 1} } |
| 202 | is($ok, 1, 'Given($undef) when($undef)'); |
| 203 | } |
| 204 | |
| 205 | |
| 206 | # Regular expressions |
| 207 | { |
| 208 | my ($ok1, $ok2); |
| 209 | given("Hello, world!") { |
| 210 | when(/lo/) |
| 211 | { $ok1 = 'y'; continue} |
| 212 | when(/no/) |
| 213 | { $ok1 = 'n'; continue} |
| 214 | when(/^(Hello,|Goodbye cruel) world[!.?]/) |
| 215 | { $ok2 = 'Y'; continue} |
| 216 | when(/^(Hello cruel|Goodbye,) world[!.?]/) |
| 217 | { $ok2 = 'n'; continue} |
| 218 | } |
| 219 | is($ok1, 'y', "regex 1"); |
| 220 | is($ok2, 'Y', "regex 2"); |
| 221 | } |
| 222 | |
| 223 | # Comparisons |
| 224 | { |
| 225 | my $test = "explicit numeric comparison (<)"; |
| 226 | my $twenty_five = 25; |
| 227 | my $ok; |
| 228 | given($twenty_five) { |
| 229 | when ($_ < 10) { $ok = "ten" } |
| 230 | when ($_ < 20) { $ok = "twenty" } |
| 231 | when ($_ < 30) { $ok = "thirty" } |
| 232 | when ($_ < 40) { $ok = "forty" } |
| 233 | default { $ok = "default" } |
| 234 | } |
| 235 | is($ok, "thirty", $test); |
| 236 | } |
| 237 | |
| 238 | { |
| 239 | use integer; |
| 240 | my $test = "explicit numeric comparison (integer <)"; |
| 241 | my $twenty_five = 25; |
| 242 | my $ok; |
| 243 | given($twenty_five) { |
| 244 | when ($_ < 10) { $ok = "ten" } |
| 245 | when ($_ < 20) { $ok = "twenty" } |
| 246 | when ($_ < 30) { $ok = "thirty" } |
| 247 | when ($_ < 40) { $ok = "forty" } |
| 248 | default { $ok = "default" } |
| 249 | } |
| 250 | is($ok, "thirty", $test); |
| 251 | } |
| 252 | |
| 253 | { |
| 254 | my $test = "explicit numeric comparison (<=)"; |
| 255 | my $twenty_five = 25; |
| 256 | my $ok; |
| 257 | given($twenty_five) { |
| 258 | when ($_ <= 10) { $ok = "ten" } |
| 259 | when ($_ <= 20) { $ok = "twenty" } |
| 260 | when ($_ <= 30) { $ok = "thirty" } |
| 261 | when ($_ <= 40) { $ok = "forty" } |
| 262 | default { $ok = "default" } |
| 263 | } |
| 264 | is($ok, "thirty", $test); |
| 265 | } |
| 266 | |
| 267 | { |
| 268 | use integer; |
| 269 | my $test = "explicit numeric comparison (integer <=)"; |
| 270 | my $twenty_five = 25; |
| 271 | my $ok; |
| 272 | given($twenty_five) { |
| 273 | when ($_ <= 10) { $ok = "ten" } |
| 274 | when ($_ <= 20) { $ok = "twenty" } |
| 275 | when ($_ <= 30) { $ok = "thirty" } |
| 276 | when ($_ <= 40) { $ok = "forty" } |
| 277 | default { $ok = "default" } |
| 278 | } |
| 279 | is($ok, "thirty", $test); |
| 280 | } |
| 281 | |
| 282 | |
| 283 | { |
| 284 | my $test = "explicit numeric comparison (>)"; |
| 285 | my $twenty_five = 25; |
| 286 | my $ok; |
| 287 | given($twenty_five) { |
| 288 | when ($_ > 40) { $ok = "forty" } |
| 289 | when ($_ > 30) { $ok = "thirty" } |
| 290 | when ($_ > 20) { $ok = "twenty" } |
| 291 | when ($_ > 10) { $ok = "ten" } |
| 292 | default { $ok = "default" } |
| 293 | } |
| 294 | is($ok, "twenty", $test); |
| 295 | } |
| 296 | |
| 297 | { |
| 298 | my $test = "explicit numeric comparison (>=)"; |
| 299 | my $twenty_five = 25; |
| 300 | my $ok; |
| 301 | given($twenty_five) { |
| 302 | when ($_ >= 40) { $ok = "forty" } |
| 303 | when ($_ >= 30) { $ok = "thirty" } |
| 304 | when ($_ >= 20) { $ok = "twenty" } |
| 305 | when ($_ >= 10) { $ok = "ten" } |
| 306 | default { $ok = "default" } |
| 307 | } |
| 308 | is($ok, "twenty", $test); |
| 309 | } |
| 310 | |
| 311 | { |
| 312 | use integer; |
| 313 | my $test = "explicit numeric comparison (integer >)"; |
| 314 | my $twenty_five = 25; |
| 315 | my $ok; |
| 316 | given($twenty_five) { |
| 317 | when ($_ > 40) { $ok = "forty" } |
| 318 | when ($_ > 30) { $ok = "thirty" } |
| 319 | when ($_ > 20) { $ok = "twenty" } |
| 320 | when ($_ > 10) { $ok = "ten" } |
| 321 | default { $ok = "default" } |
| 322 | } |
| 323 | is($ok, "twenty", $test); |
| 324 | } |
| 325 | |
| 326 | { |
| 327 | use integer; |
| 328 | my $test = "explicit numeric comparison (integer >=)"; |
| 329 | my $twenty_five = 25; |
| 330 | my $ok; |
| 331 | given($twenty_five) { |
| 332 | when ($_ >= 40) { $ok = "forty" } |
| 333 | when ($_ >= 30) { $ok = "thirty" } |
| 334 | when ($_ >= 20) { $ok = "twenty" } |
| 335 | when ($_ >= 10) { $ok = "ten" } |
| 336 | default { $ok = "default" } |
| 337 | } |
| 338 | is($ok, "twenty", $test); |
| 339 | } |
| 340 | |
| 341 | |
| 342 | { |
| 343 | my $test = "explicit string comparison (lt)"; |
| 344 | my $twenty_five = "25"; |
| 345 | my $ok; |
| 346 | given($twenty_five) { |
| 347 | when ($_ lt "10") { $ok = "ten" } |
| 348 | when ($_ lt "20") { $ok = "twenty" } |
| 349 | when ($_ lt "30") { $ok = "thirty" } |
| 350 | when ($_ lt "40") { $ok = "forty" } |
| 351 | default { $ok = "default" } |
| 352 | } |
| 353 | is($ok, "thirty", $test); |
| 354 | } |
| 355 | |
| 356 | { |
| 357 | my $test = "explicit string comparison (le)"; |
| 358 | my $twenty_five = "25"; |
| 359 | my $ok; |
| 360 | given($twenty_five) { |
| 361 | when ($_ le "10") { $ok = "ten" } |
| 362 | when ($_ le "20") { $ok = "twenty" } |
| 363 | when ($_ le "30") { $ok = "thirty" } |
| 364 | when ($_ le "40") { $ok = "forty" } |
| 365 | default { $ok = "default" } |
| 366 | } |
| 367 | is($ok, "thirty", $test); |
| 368 | } |
| 369 | |
| 370 | { |
| 371 | my $test = "explicit string comparison (gt)"; |
| 372 | my $twenty_five = 25; |
| 373 | my $ok; |
| 374 | given($twenty_five) { |
| 375 | when ($_ ge "40") { $ok = "forty" } |
| 376 | when ($_ ge "30") { $ok = "thirty" } |
| 377 | when ($_ ge "20") { $ok = "twenty" } |
| 378 | when ($_ ge "10") { $ok = "ten" } |
| 379 | default { $ok = "default" } |
| 380 | } |
| 381 | is($ok, "twenty", $test); |
| 382 | } |
| 383 | |
| 384 | { |
| 385 | my $test = "explicit string comparison (ge)"; |
| 386 | my $twenty_five = 25; |
| 387 | my $ok; |
| 388 | given($twenty_five) { |
| 389 | when ($_ ge "40") { $ok = "forty" } |
| 390 | when ($_ ge "30") { $ok = "thirty" } |
| 391 | when ($_ ge "20") { $ok = "twenty" } |
| 392 | when ($_ ge "10") { $ok = "ten" } |
| 393 | default { $ok = "default" } |
| 394 | } |
| 395 | is($ok, "twenty", $test); |
| 396 | } |
| 397 | |
| 398 | # Make sure it still works with a lexical $_: |
| 399 | { |
| 400 | my $_; |
| 401 | my $test = "explicit comparison with lexical \$_"; |
| 402 | my $twenty_five = 25; |
| 403 | my $ok; |
| 404 | given($twenty_five) { |
| 405 | when ($_ ge "40") { $ok = "forty" } |
| 406 | when ($_ ge "30") { $ok = "thirty" } |
| 407 | when ($_ ge "20") { $ok = "twenty" } |
| 408 | when ($_ ge "10") { $ok = "ten" } |
| 409 | default { $ok = "default" } |
| 410 | } |
| 411 | is($ok, "twenty", $test); |
| 412 | } |
| 413 | |
| 414 | # Optimized-away comparisons |
| 415 | { |
| 416 | my $ok; |
| 417 | given(23) { |
| 418 | when (2 + 2 == 4) { $ok = 'y'; continue } |
| 419 | when (2 + 2 == 5) { $ok = 'n' } |
| 420 | } |
| 421 | is($ok, 'y', "Optimized-away comparison"); |
| 422 | } |
| 423 | |
| 424 | { |
| 425 | my $ok; |
| 426 | given(23) { |
| 427 | when (scalar 24) { $ok = 'n'; continue } |
| 428 | default { $ok = 'y' } |
| 429 | } |
| 430 | is($ok,'y','scalar()'); |
| 431 | } |
| 432 | |
| 433 | # File tests |
| 434 | # (How to be both thorough and portable? Pinch a few ideas |
| 435 | # from t/op/filetest.t. We err on the side of portability for |
| 436 | # the time being.) |
| 437 | |
| 438 | { |
| 439 | my ($ok_d, $ok_f, $ok_r); |
| 440 | given("op") { |
| 441 | when(-d) {$ok_d = 1; continue} |
| 442 | when(!-f) {$ok_f = 1; continue} |
| 443 | when(-r) {$ok_r = 1; continue} |
| 444 | } |
| 445 | ok($ok_d, "Filetest -d"); |
| 446 | ok($ok_f, "Filetest -f"); |
| 447 | ok($ok_r, "Filetest -r"); |
| 448 | } |
| 449 | |
| 450 | # Sub and method calls |
| 451 | sub notfoo {"bar"} |
| 452 | { |
| 453 | my $ok = 0; |
| 454 | given("foo") { |
| 455 | when(notfoo()) {$ok = 1} |
| 456 | } |
| 457 | ok($ok, "Sub call acts as boolean") |
| 458 | } |
| 459 | |
| 460 | { |
| 461 | my $ok = 0; |
| 462 | given("foo") { |
| 463 | when(main->notfoo()) {$ok = 1} |
| 464 | } |
| 465 | ok($ok, "Class-method call acts as boolean") |
| 466 | } |
| 467 | |
| 468 | { |
| 469 | my $ok = 0; |
| 470 | my $obj = bless []; |
| 471 | given("foo") { |
| 472 | when($obj->notfoo()) {$ok = 1} |
| 473 | } |
| 474 | ok($ok, "Object-method call acts as boolean") |
| 475 | } |
| 476 | |
| 477 | # Other things that should not be smart matched |
| 478 | { |
| 479 | my $ok = 0; |
| 480 | given(12) { |
| 481 | when( /(\d+)/ and ( 1 <= $1 and $1 <= 12 ) ) { |
| 482 | $ok = 1; |
| 483 | } |
| 484 | } |
| 485 | ok($ok, "bool not smartmatches"); |
| 486 | } |
| 487 | |
| 488 | { |
| 489 | my $ok = 0; |
| 490 | given(0) { |
| 491 | when(eof(DATA)) { |
| 492 | $ok = 1; |
| 493 | } |
| 494 | } |
| 495 | ok($ok, "eof() not smartmatched"); |
| 496 | } |
| 497 | |
| 498 | { |
| 499 | my $ok = 0; |
| 500 | my %foo = ("bar", 0); |
| 501 | given(0) { |
| 502 | when(exists $foo{bar}) { |
| 503 | $ok = 1; |
| 504 | } |
| 505 | } |
| 506 | ok($ok, "exists() not smartmatched"); |
| 507 | } |
| 508 | |
| 509 | { |
| 510 | my $ok = 0; |
| 511 | given(0) { |
| 512 | when(defined $ok) { |
| 513 | $ok = 1; |
| 514 | } |
| 515 | } |
| 516 | ok($ok, "defined() not smartmatched"); |
| 517 | } |
| 518 | |
| 519 | { |
| 520 | my $ok = 1; |
| 521 | given("foo") { |
| 522 | when((1 == 1) && "bar") { |
| 523 | $ok = 0; |
| 524 | } |
| 525 | when((1 == 1) && $_ eq "foo") { |
| 526 | $ok = 2; |
| 527 | } |
| 528 | } |
| 529 | is($ok, 2, "((1 == 1) && \"bar\") not smartmatched"); |
| 530 | } |
| 531 | |
| 532 | { |
| 533 | my $n = 0; |
| 534 | for my $l (qw(a b c d)) { |
| 535 | given ($l) { |
| 536 | when ($_ eq "b" .. $_ eq "c") { $n = 1 } |
| 537 | default { $n = 0 } |
| 538 | } |
| 539 | ok(($n xor $l =~ /[ad]/), 'when(E1..E2) evaluates in boolean context'); |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | { |
| 544 | my $n = 0; |
| 545 | for my $l (qw(a b c d)) { |
| 546 | given ($l) { |
| 547 | when ($_ eq "b" ... $_ eq "c") { $n = 1 } |
| 548 | default { $n = 0 } |
| 549 | } |
| 550 | ok(($n xor $l =~ /[ad]/), 'when(E1...E2) evaluates in boolean context'); |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | { |
| 555 | my $ok = 0; |
| 556 | given("foo") { |
| 557 | when((1 == $ok) || "foo") { |
| 558 | $ok = 1; |
| 559 | } |
| 560 | } |
| 561 | ok($ok, '((1 == $ok) || "foo") smartmatched'); |
| 562 | } |
| 563 | |
| 564 | { |
| 565 | my $ok = 0; |
| 566 | given("foo") { |
| 567 | when((1 == $ok || undef) // "foo") { |
| 568 | $ok = 1; |
| 569 | } |
| 570 | } |
| 571 | ok($ok, '((1 == $ok || undef) // "foo") smartmatched'); |
| 572 | } |
| 573 | |
| 574 | # Make sure we aren't invoking the get-magic more than once |
| 575 | |
| 576 | { # A helper class to count the number of accesses. |
| 577 | package FetchCounter; |
| 578 | sub TIESCALAR { |
| 579 | my ($class) = @_; |
| 580 | bless {value => undef, count => 0}, $class; |
| 581 | } |
| 582 | sub STORE { |
| 583 | my ($self, $val) = @_; |
| 584 | $self->{count} = 0; |
| 585 | $self->{value} = $val; |
| 586 | } |
| 587 | sub FETCH { |
| 588 | my ($self) = @_; |
| 589 | # Avoid pre/post increment here |
| 590 | $self->{count} = 1 + $self->{count}; |
| 591 | $self->{value}; |
| 592 | } |
| 593 | sub count { |
| 594 | my ($self) = @_; |
| 595 | $self->{count}; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | my $f = tie my $v, "FetchCounter"; |
| 600 | |
| 601 | { my $test_name = "Multiple FETCHes in given, due to aliasing"; |
| 602 | my $ok; |
| 603 | given($v = 23) { |
| 604 | when(undef) {} |
| 605 | when(sub{0}->()) {} |
| 606 | when(21) {} |
| 607 | when("22") {} |
| 608 | when(23) {$ok = 1} |
| 609 | when(/24/) {$ok = 0} |
| 610 | } |
| 611 | is($ok, 1, "precheck: $test_name"); |
| 612 | is($f->count(), 4, $test_name); |
| 613 | } |
| 614 | |
| 615 | { my $test_name = "Only one FETCH (numeric when)"; |
| 616 | my $ok; |
| 617 | $v = 23; |
| 618 | is($f->count(), 0, "Sanity check: $test_name"); |
| 619 | given(23) { |
| 620 | when(undef) {} |
| 621 | when(sub{0}->()) {} |
| 622 | when(21) {} |
| 623 | when("22") {} |
| 624 | when($v) {$ok = 1} |
| 625 | when(/24/) {$ok = 0} |
| 626 | } |
| 627 | is($ok, 1, "precheck: $test_name"); |
| 628 | is($f->count(), 1, $test_name); |
| 629 | } |
| 630 | |
| 631 | { my $test_name = "Only one FETCH (string when)"; |
| 632 | my $ok; |
| 633 | $v = "23"; |
| 634 | is($f->count(), 0, "Sanity check: $test_name"); |
| 635 | given("23") { |
| 636 | when(undef) {} |
| 637 | when(sub{0}->()) {} |
| 638 | when("21") {} |
| 639 | when("22") {} |
| 640 | when($v) {$ok = 1} |
| 641 | when(/24/) {$ok = 0} |
| 642 | } |
| 643 | is($ok, 1, "precheck: $test_name"); |
| 644 | is($f->count(), 1, $test_name); |
| 645 | } |
| 646 | |
| 647 | { my $test_name = "Only one FETCH (undef)"; |
| 648 | my $ok; |
| 649 | $v = undef; |
| 650 | is($f->count(), 0, "Sanity check: $test_name"); |
| 651 | no warnings "uninitialized"; |
| 652 | given(my $undef) { |
| 653 | when(sub{0}->()) {} |
| 654 | when("21") {} |
| 655 | when("22") {} |
| 656 | when($v) {$ok = 1} |
| 657 | when(undef) {$ok = 0} |
| 658 | } |
| 659 | is($ok, 1, "precheck: $test_name"); |
| 660 | is($f->count(), 1, $test_name); |
| 661 | } |
| 662 | |
| 663 | # Loop topicalizer |
| 664 | { |
| 665 | my $first = 1; |
| 666 | for (1, "two") { |
| 667 | when ("two") { |
| 668 | is($first, 0, "Loop: second"); |
| 669 | eval {break}; |
| 670 | like($@, qr/^Can't "break" in a loop topicalizer/, |
| 671 | q{Can't "break" in a loop topicalizer}); |
| 672 | } |
| 673 | when (1) { |
| 674 | is($first, 1, "Loop: first"); |
| 675 | $first = 0; |
| 676 | # Implicit break is okay |
| 677 | } |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | { |
| 682 | my $first = 1; |
| 683 | for $_ (1, "two") { |
| 684 | when ("two") { |
| 685 | is($first, 0, "Explicit \$_: second"); |
| 686 | eval {break}; |
| 687 | like($@, qr/^Can't "break" in a loop topicalizer/, |
| 688 | q{Can't "break" in a loop topicalizer}); |
| 689 | } |
| 690 | when (1) { |
| 691 | is($first, 1, "Explicit \$_: first"); |
| 692 | $first = 0; |
| 693 | # Implicit break is okay |
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | { |
| 699 | my $first = 1; |
| 700 | my $_; |
| 701 | for (1, "two") { |
| 702 | when ("two") { |
| 703 | is($first, 0, "Implicitly lexical loop: second"); |
| 704 | eval {break}; |
| 705 | like($@, qr/^Can't "break" in a loop topicalizer/, |
| 706 | q{Can't "break" in a loop topicalizer}); |
| 707 | } |
| 708 | when (1) { |
| 709 | is($first, 1, "Implicitly lexical loop: first"); |
| 710 | $first = 0; |
| 711 | # Implicit break is okay |
| 712 | } |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | { |
| 717 | my $first = 1; |
| 718 | my $_; |
| 719 | for $_ (1, "two") { |
| 720 | when ("two") { |
| 721 | is($first, 0, "Implicitly lexical, explicit \$_: second"); |
| 722 | eval {break}; |
| 723 | like($@, qr/^Can't "break" in a loop topicalizer/, |
| 724 | q{Can't "break" in a loop topicalizer}); |
| 725 | } |
| 726 | when (1) { |
| 727 | is($first, 1, "Implicitly lexical, explicit \$_: first"); |
| 728 | $first = 0; |
| 729 | # Implicit break is okay |
| 730 | } |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | { |
| 735 | my $first = 1; |
| 736 | for my $_ (1, "two") { |
| 737 | when ("two") { |
| 738 | is($first, 0, "Lexical loop: second"); |
| 739 | eval {break}; |
| 740 | like($@, qr/^Can't "break" in a loop topicalizer/, |
| 741 | q{Can't "break" in a loop topicalizer}); |
| 742 | } |
| 743 | when (1) { |
| 744 | is($first, 1, "Lexical loop: first"); |
| 745 | $first = 0; |
| 746 | # Implicit break is okay |
| 747 | } |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | |
| 752 | # Code references |
| 753 | { |
| 754 | my $called_foo = 0; |
| 755 | sub foo {$called_foo = 1; "@_" eq "foo"} |
| 756 | my $called_bar = 0; |
| 757 | sub bar {$called_bar = 1; "@_" eq "bar"} |
| 758 | my ($matched_foo, $matched_bar) = (0, 0); |
| 759 | given("foo") { |
| 760 | when(\&bar) {$matched_bar = 1} |
| 761 | when(\&foo) {$matched_foo = 1} |
| 762 | } |
| 763 | is($called_foo, 1, "foo() was called"); |
| 764 | is($called_bar, 1, "bar() was called"); |
| 765 | is($matched_bar, 0, "bar didn't match"); |
| 766 | is($matched_foo, 1, "foo did match"); |
| 767 | } |
| 768 | |
| 769 | sub contains_x { |
| 770 | my $x = shift; |
| 771 | return ($x =~ /x/); |
| 772 | } |
| 773 | { |
| 774 | my ($ok1, $ok2) = (0,0); |
| 775 | given("foxy!") { |
| 776 | when(contains_x($_)) |
| 777 | { $ok1 = 1; continue } |
| 778 | when(\&contains_x) |
| 779 | { $ok2 = 1; continue } |
| 780 | } |
| 781 | is($ok1, 1, "Calling sub directly (true)"); |
| 782 | is($ok2, 1, "Calling sub indirectly (true)"); |
| 783 | |
| 784 | given("foggy") { |
| 785 | when(contains_x($_)) |
| 786 | { $ok1 = 2; continue } |
| 787 | when(\&contains_x) |
| 788 | { $ok2 = 2; continue } |
| 789 | } |
| 790 | is($ok1, 1, "Calling sub directly (false)"); |
| 791 | is($ok2, 1, "Calling sub indirectly (false)"); |
| 792 | } |
| 793 | |
| 794 | SKIP: { |
| 795 | skip_if_miniperl("no dynamic loading on miniperl, no Scalar::Util", 14); |
| 796 | # Test overloading |
| 797 | { package OverloadTest; |
| 798 | |
| 799 | use overload '""' => sub{"string value of obj"}; |
| 800 | use overload 'eq' => sub{"$_[0]" eq "$_[1]"}; |
| 801 | |
| 802 | use overload "~~" => sub { |
| 803 | my ($self, $other, $reversed) = @_; |
| 804 | if ($reversed) { |
| 805 | $self->{left} = $other; |
| 806 | $self->{right} = $self; |
| 807 | $self->{reversed} = 1; |
| 808 | } else { |
| 809 | $self->{left} = $self; |
| 810 | $self->{right} = $other; |
| 811 | $self->{reversed} = 0; |
| 812 | } |
| 813 | $self->{called} = 1; |
| 814 | return $self->{retval}; |
| 815 | }; |
| 816 | |
| 817 | sub new { |
| 818 | my ($pkg, $retval) = @_; |
| 819 | bless { |
| 820 | called => 0, |
| 821 | retval => $retval, |
| 822 | }, $pkg; |
| 823 | } |
| 824 | } |
| 825 | |
| 826 | { |
| 827 | my $test = "Overloaded obj in given (true)"; |
| 828 | my $obj = OverloadTest->new(1); |
| 829 | my $matched; |
| 830 | given($obj) { |
| 831 | when ("other arg") {$matched = 1} |
| 832 | default {$matched = 0} |
| 833 | } |
| 834 | |
| 835 | is($obj->{called}, 1, "$test: called"); |
| 836 | ok($matched, "$test: matched"); |
| 837 | } |
| 838 | |
| 839 | { |
| 840 | my $test = "Overloaded obj in given (false)"; |
| 841 | my $obj = OverloadTest->new(0); |
| 842 | my $matched; |
| 843 | given($obj) { |
| 844 | when ("other arg") {$matched = 1} |
| 845 | } |
| 846 | |
| 847 | is($obj->{called}, 1, "$test: called"); |
| 848 | ok(!$matched, "$test: not matched"); |
| 849 | } |
| 850 | |
| 851 | { |
| 852 | my $test = "Overloaded obj in when (true)"; |
| 853 | my $obj = OverloadTest->new(1); |
| 854 | my $matched; |
| 855 | given("topic") { |
| 856 | when ($obj) {$matched = 1} |
| 857 | default {$matched = 0} |
| 858 | } |
| 859 | |
| 860 | is($obj->{called}, 1, "$test: called"); |
| 861 | ok($matched, "$test: matched"); |
| 862 | is($obj->{left}, "topic", "$test: left"); |
| 863 | is($obj->{right}, "string value of obj", "$test: right"); |
| 864 | ok($obj->{reversed}, "$test: reversed"); |
| 865 | } |
| 866 | |
| 867 | { |
| 868 | my $test = "Overloaded obj in when (false)"; |
| 869 | my $obj = OverloadTest->new(0); |
| 870 | my $matched; |
| 871 | given("topic") { |
| 872 | when ($obj) {$matched = 1} |
| 873 | default {$matched = 0} |
| 874 | } |
| 875 | |
| 876 | is($obj->{called}, 1, "$test: called"); |
| 877 | ok(!$matched, "$test: not matched"); |
| 878 | is($obj->{left}, "topic", "$test: left"); |
| 879 | is($obj->{right}, "string value of obj", "$test: right"); |
| 880 | ok($obj->{reversed}, "$test: reversed"); |
| 881 | } |
| 882 | } |
| 883 | |
| 884 | # Postfix when |
| 885 | { |
| 886 | my $ok; |
| 887 | given (undef) { |
| 888 | $ok = 1 when undef; |
| 889 | } |
| 890 | is($ok, 1, "postfix undef"); |
| 891 | } |
| 892 | { |
| 893 | my $ok; |
| 894 | given (2) { |
| 895 | $ok += 1 when 7; |
| 896 | $ok += 2 when 9.1685; |
| 897 | $ok += 4 when $_ > 4; |
| 898 | $ok += 8 when $_ < 2.5; |
| 899 | } |
| 900 | is($ok, 8, "postfix numeric"); |
| 901 | } |
| 902 | { |
| 903 | my $ok; |
| 904 | given ("apple") { |
| 905 | $ok = 1, continue when $_ eq "apple"; |
| 906 | $ok += 2; |
| 907 | $ok = 0 when "banana"; |
| 908 | } |
| 909 | is($ok, 3, "postfix string"); |
| 910 | } |
| 911 | { |
| 912 | my $ok; |
| 913 | given ("pear") { |
| 914 | do { $ok = 1; continue } when /pea/; |
| 915 | $ok += 2; |
| 916 | $ok = 0 when /pie/; |
| 917 | default { $ok += 4 } |
| 918 | $ok = 0; |
| 919 | } |
| 920 | is($ok, 7, "postfix regex"); |
| 921 | } |
| 922 | # be_true is defined at the beginning of the file |
| 923 | { |
| 924 | my $x = "what"; |
| 925 | given(my $x = "foo") { |
| 926 | do { |
| 927 | is($x, "foo", "scope inside ... when my \$x = ..."); |
| 928 | continue; |
| 929 | } when be_true(my $x = "bar"); |
| 930 | is($x, "bar", "scope after ... when my \$x = ..."); |
| 931 | } |
| 932 | } |
| 933 | { |
| 934 | my $x = 0; |
| 935 | given(my $x = 1) { |
| 936 | my $x = 2, continue when be_true(); |
| 937 | is($x, undef, "scope after my \$x = ... when ..."); |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | # Tests for last and next in when clauses |
| 942 | my $letter; |
| 943 | |
| 944 | $letter = ''; |
| 945 | for ("a".."e") { |
| 946 | given ($_) { |
| 947 | $letter = $_; |
| 948 | when ("b") { last } |
| 949 | } |
| 950 | $letter = "z"; |
| 951 | } |
| 952 | is($letter, "b", "last in when"); |
| 953 | |
| 954 | $letter = ''; |
| 955 | LETTER1: for ("a".."e") { |
| 956 | given ($_) { |
| 957 | $letter = $_; |
| 958 | when ("b") { last LETTER1 } |
| 959 | } |
| 960 | $letter = "z"; |
| 961 | } |
| 962 | is($letter, "b", "last LABEL in when"); |
| 963 | |
| 964 | $letter = ''; |
| 965 | for ("a".."e") { |
| 966 | given ($_) { |
| 967 | when (/b|d/) { next } |
| 968 | $letter .= $_; |
| 969 | } |
| 970 | $letter .= ','; |
| 971 | } |
| 972 | is($letter, "a,c,e,", "next in when"); |
| 973 | |
| 974 | $letter = ''; |
| 975 | LETTER2: for ("a".."e") { |
| 976 | given ($_) { |
| 977 | when (/b|d/) { next LETTER2 } |
| 978 | $letter .= $_; |
| 979 | } |
| 980 | $letter .= ','; |
| 981 | } |
| 982 | is($letter, "a,c,e,", "next LABEL in when"); |
| 983 | |
| 984 | # Test goto with given/when |
| 985 | { |
| 986 | my $flag = 0; |
| 987 | goto GIVEN1; |
| 988 | $flag = 1; |
| 989 | GIVEN1: given ($flag) { |
| 990 | when (0) { break; } |
| 991 | $flag = 2; |
| 992 | } |
| 993 | is($flag, 0, "goto GIVEN1"); |
| 994 | } |
| 995 | { |
| 996 | my $flag = 0; |
| 997 | given ($flag) { |
| 998 | when (0) { $flag = 1; } |
| 999 | goto GIVEN2; |
| 1000 | $flag = 2; |
| 1001 | } |
| 1002 | GIVEN2: |
| 1003 | is($flag, 1, "goto inside given"); |
| 1004 | } |
| 1005 | { |
| 1006 | my $flag = 0; |
| 1007 | given ($flag) { |
| 1008 | when (0) { $flag = 1; goto GIVEN3; $flag = 2; } |
| 1009 | $flag = 3; |
| 1010 | } |
| 1011 | GIVEN3: |
| 1012 | is($flag, 1, "goto inside given and when"); |
| 1013 | } |
| 1014 | { |
| 1015 | my $flag = 0; |
| 1016 | for ($flag) { |
| 1017 | when (0) { $flag = 1; goto GIVEN4; $flag = 2; } |
| 1018 | $flag = 3; |
| 1019 | } |
| 1020 | GIVEN4: |
| 1021 | is($flag, 1, "goto inside for and when"); |
| 1022 | } |
| 1023 | { |
| 1024 | my $flag = 0; |
| 1025 | GIVEN5: |
| 1026 | given ($flag) { |
| 1027 | when (0) { $flag = 1; goto GIVEN5; $flag = 2; } |
| 1028 | when (1) { break; } |
| 1029 | $flag = 3; |
| 1030 | } |
| 1031 | is($flag, 1, "goto inside given and when to the given stmt"); |
| 1032 | } |
| 1033 | |
| 1034 | # test with unreified @_ in smart match [perl #71078] |
| 1035 | sub unreified_check { ok([@_] ~~ \@_) } # should always match |
| 1036 | unreified_check(1,2,"lala"); |
| 1037 | unreified_check(1,2,undef); |
| 1038 | unreified_check(undef); |
| 1039 | unreified_check(undef,""); |
| 1040 | |
| 1041 | # Test do { given } as a rvalue |
| 1042 | |
| 1043 | { |
| 1044 | # Simple scalar |
| 1045 | my $lexical = 5; |
| 1046 | my @things = (11 .. 26); # 16 elements |
| 1047 | my @exp = (5, 16, 9); |
| 1048 | no warnings 'void'; |
| 1049 | for (0, 1, 2) { |
| 1050 | my $scalar = do { given ($_) { |
| 1051 | when (0) { $lexical } |
| 1052 | when (2) { 'void'; 8, 9 } |
| 1053 | @things; |
| 1054 | } }; |
| 1055 | is($scalar, shift(@exp), "rvalue given - simple scalar [$_]"); |
| 1056 | } |
| 1057 | } |
| 1058 | { |
| 1059 | # Postfix scalar |
| 1060 | my $lexical = 5; |
| 1061 | my @exp = (5, 7, 9); |
| 1062 | for (0, 1, 2) { |
| 1063 | no warnings 'void'; |
| 1064 | my $scalar = do { given ($_) { |
| 1065 | $lexical when 0; |
| 1066 | 8, 9 when 2; |
| 1067 | 6, 7; |
| 1068 | } }; |
| 1069 | is($scalar, shift(@exp), "rvalue given - postfix scalar [$_]"); |
| 1070 | } |
| 1071 | } |
| 1072 | { |
| 1073 | # Default scalar |
| 1074 | my @exp = (5, 9, 9); |
| 1075 | for (0, 1, 2) { |
| 1076 | my $scalar = do { given ($_) { |
| 1077 | no warnings 'void'; |
| 1078 | when (0) { 5 } |
| 1079 | default { 8, 9 } |
| 1080 | 6, 7; |
| 1081 | } }; |
| 1082 | is($scalar, shift(@exp), "rvalue given - default scalar [$_]"); |
| 1083 | } |
| 1084 | } |
| 1085 | { |
| 1086 | # Simple list |
| 1087 | my @things = (11 .. 13); |
| 1088 | my @exp = ('3 4 5', '11 12 13', '8 9'); |
| 1089 | for (0, 1, 2) { |
| 1090 | my @list = do { given ($_) { |
| 1091 | when (0) { 3 .. 5 } |
| 1092 | when (2) { my $fake = 'void'; 8, 9 } |
| 1093 | @things; |
| 1094 | } }; |
| 1095 | is("@list", shift(@exp), "rvalue given - simple list [$_]"); |
| 1096 | } |
| 1097 | } |
| 1098 | { |
| 1099 | # Postfix list |
| 1100 | my @things = (12); |
| 1101 | my @exp = ('3 4 5', '6 7', '12'); |
| 1102 | for (0, 1, 2) { |
| 1103 | my @list = do { given ($_) { |
| 1104 | 3 .. 5 when 0; |
| 1105 | @things when 2; |
| 1106 | 6, 7; |
| 1107 | } }; |
| 1108 | is("@list", shift(@exp), "rvalue given - postfix list [$_]"); |
| 1109 | } |
| 1110 | } |
| 1111 | { |
| 1112 | # Default list |
| 1113 | my @things = (11 .. 20); # 10 elements |
| 1114 | my @exp = ('m o o', '8 10', '8 10'); |
| 1115 | for (0, 1, 2) { |
| 1116 | my @list = do { given ($_) { |
| 1117 | when (0) { "moo" =~ /(.)/g } |
| 1118 | default { 8, scalar(@things) } |
| 1119 | 6, 7; |
| 1120 | } }; |
| 1121 | is("@list", shift(@exp), "rvalue given - default list [$_]"); |
| 1122 | } |
| 1123 | } |
| 1124 | { |
| 1125 | # Switch control |
| 1126 | my @exp = ('6 7', '', '6 7'); |
| 1127 | for (0, 1, 2, 3) { |
| 1128 | my @list = do { given ($_) { |
| 1129 | continue when $_ <= 1; |
| 1130 | break when 1; |
| 1131 | next when 2; |
| 1132 | 6, 7; |
| 1133 | } }; |
| 1134 | is("@list", shift(@exp), "rvalue given - default list [$_]"); |
| 1135 | } |
| 1136 | } |
| 1137 | { |
| 1138 | # Context propagation |
| 1139 | my $smart_hash = sub { |
| 1140 | do { given ($_[0]) { |
| 1141 | 'undef' when undef; |
| 1142 | when ([ 1 .. 3 ]) { 1 .. 3 } |
| 1143 | when (4) { my $fake; do { 4, 5 } } |
| 1144 | } }; |
| 1145 | }; |
| 1146 | |
| 1147 | my $scalar; |
| 1148 | |
| 1149 | $scalar = $smart_hash->(); |
| 1150 | is($scalar, 'undef', "rvalue given - scalar context propagation [undef]"); |
| 1151 | |
| 1152 | $scalar = $smart_hash->(4); |
| 1153 | is($scalar, 5, "rvalue given - scalar context propagation [4]"); |
| 1154 | |
| 1155 | $scalar = $smart_hash->(999); |
| 1156 | is($scalar, undef, "rvalue given - scalar context propagation [999]"); |
| 1157 | |
| 1158 | my @list; |
| 1159 | |
| 1160 | @list = $smart_hash->(); |
| 1161 | is("@list", 'undef', "rvalue given - list context propagation [undef]"); |
| 1162 | |
| 1163 | @list = $smart_hash->(2); |
| 1164 | is("@list", '1 2 3', "rvalue given - list context propagation [2]"); |
| 1165 | |
| 1166 | @list = $smart_hash->(4); |
| 1167 | is("@list", '4 5', "rvalue given - list context propagation [4]"); |
| 1168 | |
| 1169 | @list = $smart_hash->(999); |
| 1170 | is("@list", '', "rvalue given - list context propagation [999]"); |
| 1171 | } |
| 1172 | { |
| 1173 | # Array slices |
| 1174 | my @list = 10 .. 15; |
| 1175 | my @in_list; |
| 1176 | my @in_slice; |
| 1177 | for (5, 10, 15) { |
| 1178 | given ($_) { |
| 1179 | when (@list) { |
| 1180 | push @in_list, $_; |
| 1181 | continue; |
| 1182 | } |
| 1183 | when (@list[0..2]) { |
| 1184 | push @in_slice, $_; |
| 1185 | } |
| 1186 | } |
| 1187 | } |
| 1188 | is("@in_list", "10 15", "when(array)"); |
| 1189 | is("@in_slice", "10", "when(array slice)"); |
| 1190 | } |
| 1191 | { |
| 1192 | # Hash slices |
| 1193 | my %list = map { $_ => $_ } "a" .. "f"; |
| 1194 | my @in_list; |
| 1195 | my @in_slice; |
| 1196 | for ("a", "e", "i") { |
| 1197 | given ($_) { |
| 1198 | when (%list) { |
| 1199 | push @in_list, $_; |
| 1200 | continue; |
| 1201 | } |
| 1202 | when (@list{"a".."c"}) { |
| 1203 | push @in_slice, $_; |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | is("@in_list", "a e", "when(hash)"); |
| 1208 | is("@in_slice", "a", "when(hash slice)"); |
| 1209 | } |
| 1210 | |
| 1211 | { # RT#84526 - Handle magical TARG |
| 1212 | my $x = my $y = "aaa"; |
| 1213 | for ($x, $y) { |
| 1214 | given ($_) { |
| 1215 | is(pos, undef, "handle magical TARG"); |
| 1216 | pos = 1; |
| 1217 | } |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | # Test that returned values are correctly propagated through several context |
| 1222 | # levels (see RT #93548). |
| 1223 | { |
| 1224 | my $tester = sub { |
| 1225 | my $id = shift; |
| 1226 | |
| 1227 | package fmurrr; |
| 1228 | |
| 1229 | our ($when_loc, $given_loc, $ext_loc); |
| 1230 | |
| 1231 | my $ext_lex = 7; |
| 1232 | our $ext_glob = 8; |
| 1233 | local $ext_loc = 9; |
| 1234 | |
| 1235 | given ($id) { |
| 1236 | my $given_lex = 4; |
| 1237 | our $given_glob = 5; |
| 1238 | local $given_loc = 6; |
| 1239 | |
| 1240 | when (0) { 0 } |
| 1241 | |
| 1242 | when (1) { my $when_lex = 1 } |
| 1243 | when (2) { our $when_glob = 2 } |
| 1244 | when (3) { local $when_loc = 3 } |
| 1245 | |
| 1246 | when (4) { $given_lex } |
| 1247 | when (5) { $given_glob } |
| 1248 | when (6) { $given_loc } |
| 1249 | |
| 1250 | when (7) { $ext_lex } |
| 1251 | when (8) { $ext_glob } |
| 1252 | when (9) { $ext_loc } |
| 1253 | |
| 1254 | 'fallback'; |
| 1255 | } |
| 1256 | }; |
| 1257 | |
| 1258 | my @descriptions = qw< |
| 1259 | constant |
| 1260 | |
| 1261 | when-lexical |
| 1262 | when-global |
| 1263 | when-local |
| 1264 | |
| 1265 | given-lexical |
| 1266 | given-global |
| 1267 | given-local |
| 1268 | |
| 1269 | extern-lexical |
| 1270 | extern-global |
| 1271 | extern-local |
| 1272 | >; |
| 1273 | |
| 1274 | for my $id (0 .. 9) { |
| 1275 | my $desc = $descriptions[$id]; |
| 1276 | |
| 1277 | my $res = $tester->($id); |
| 1278 | is $res, $id, "plain call - $desc"; |
| 1279 | |
| 1280 | $res = do { |
| 1281 | my $id_plus_1 = $id + 1; |
| 1282 | given ($id_plus_1) { |
| 1283 | do { |
| 1284 | when (/\d/) { |
| 1285 | --$id_plus_1; |
| 1286 | continue; |
| 1287 | 456; |
| 1288 | } |
| 1289 | }; |
| 1290 | default { |
| 1291 | $tester->($id_plus_1); |
| 1292 | } |
| 1293 | 'XXX'; |
| 1294 | } |
| 1295 | }; |
| 1296 | is $res, $id, "across continue and default - $desc"; |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | # Check that values returned from given/when are destroyed at the right time. |
| 1301 | { |
| 1302 | { |
| 1303 | package Fmurrr; |
| 1304 | |
| 1305 | sub new { |
| 1306 | bless { |
| 1307 | flag => \($_[1]), |
| 1308 | id => $_[2], |
| 1309 | }, $_[0] |
| 1310 | } |
| 1311 | |
| 1312 | sub DESTROY { |
| 1313 | ${$_[0]->{flag}}++; |
| 1314 | } |
| 1315 | } |
| 1316 | |
| 1317 | my @descriptions = qw< |
| 1318 | when |
| 1319 | break |
| 1320 | continue |
| 1321 | default |
| 1322 | >; |
| 1323 | |
| 1324 | for my $id (0 .. 3) { |
| 1325 | my $desc = $descriptions[$id]; |
| 1326 | |
| 1327 | my $destroyed = 0; |
| 1328 | my $res_id; |
| 1329 | |
| 1330 | { |
| 1331 | my $res = do { |
| 1332 | given ($id) { |
| 1333 | my $x; |
| 1334 | when (0) { Fmurrr->new($destroyed, 0) } |
| 1335 | when (1) { my $y = Fmurrr->new($destroyed, 1); break } |
| 1336 | when (2) { $x = Fmurrr->new($destroyed, 2); continue } |
| 1337 | when (2) { $x } |
| 1338 | default { Fmurrr->new($destroyed, 3) } |
| 1339 | } |
| 1340 | }; |
| 1341 | $res_id = $res->{id}; |
| 1342 | } |
| 1343 | $res_id = $id if $id == 1; # break doesn't return anything |
| 1344 | |
| 1345 | is $res_id, $id, "given/when returns the right object - $desc"; |
| 1346 | is $destroyed, 1, "given/when does not leak - $desc"; |
| 1347 | }; |
| 1348 | } |
| 1349 | |
| 1350 | # break() must reset the stack |
| 1351 | { |
| 1352 | my @res = (1, do { |
| 1353 | given ("x") { |
| 1354 | 2, 3, do { |
| 1355 | when (/[a-z]/) { |
| 1356 | 4, 5, 6, break |
| 1357 | } |
| 1358 | } |
| 1359 | } |
| 1360 | }); |
| 1361 | is "@res", "1", "break resets the stack"; |
| 1362 | } |
| 1363 | |
| 1364 | # RT #94682: |
| 1365 | # must ensure $_ is initialised and cleared at start/end of given block |
| 1366 | |
| 1367 | { |
| 1368 | sub f1 { |
| 1369 | my $_; |
| 1370 | given(3) { |
| 1371 | return sub { $_ } # close over lexical $_ |
| 1372 | } |
| 1373 | } |
| 1374 | is(f1()->(), 3, 'closed over $_'); |
| 1375 | |
| 1376 | package RT94682; |
| 1377 | |
| 1378 | my $d = 0; |
| 1379 | sub DESTROY { $d++ }; |
| 1380 | |
| 1381 | sub f2 { |
| 1382 | my $_ = 5; |
| 1383 | given(bless [7]) { |
| 1384 | ::is($_->[0], 7, "is [7]"); |
| 1385 | } |
| 1386 | ::is($_, 5, "is 5"); |
| 1387 | ::is($d, 1, "DESTROY called once"); |
| 1388 | } |
| 1389 | f2(); |
| 1390 | } |
| 1391 | |
| 1392 | |
| 1393 | |
| 1394 | # Okay, that'll do for now. The intricacies of the smartmatch |
| 1395 | # semantics are tested in t/op/smartmatch.t. Taintedness of |
| 1396 | # returned values is checked in t/op/taint.t. |
| 1397 | __END__ |