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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
11 // with the distribution. | 11 // with the distribution. |
12 // * Neither the name of Google Inc. nor the names of its | 12 // * Neither the name of Google Inc. nor the names of its |
13 // contributors may be used to endorse or promote products derived | 13 // contributors may be used to endorse or promote products derived |
14 // from this software without specific prior written permission. | 14 // from this software without specific prior written permission. |
15 // | 15 // |
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
28 // Flags: --harmony-generators --expose-gc | 28 // Flags: --harmony-generators --expose-gc --harmony-iteration |
29 | 29 |
30 // Test generator iteration. | 30 // Test generator iteration. |
31 | 31 |
32 var GeneratorFunction = (function*(){yield 1;}).__proto__.constructor; | 32 var GeneratorFunction = (function*(){yield 1;}).__proto__.constructor; |
33 | 33 |
34 function assertIteratorResult(value, done, result) { | 34 function assertIteratorResult(value, done, result) { |
35 assertEquals({ value: value, done: done}, result); | 35 assertEquals({ value: value, done: done}, result); |
36 } | 36 } |
37 | 37 |
38 function assertIteratorIsClosed(iter) { | 38 function assertIteratorIsClosed(iter) { |
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348 TestGenerator( | 348 TestGenerator( |
349 function* g27() { | 349 function* g27() { |
350 yield | 350 yield |
351 3 | 351 3 |
352 return | 352 return |
353 }, | 353 }, |
354 [undefined, undefined], | 354 [undefined, undefined], |
355 "foo", | 355 "foo", |
356 [undefined, undefined]); | 356 [undefined, undefined]); |
357 | 357 |
| 358 // TODO(wingo): We should use TestGenerator for these, except that |
| 359 // currently yield* will unconditionally propagate a throw() to the |
| 360 // delegate iterator, which fails for these iterators that don't have |
| 361 // throw(). See http://code.google.com/p/v8/issues/detail?id=3484. |
| 362 (function() { |
| 363 function* g28() { |
| 364 yield* [1, 2, 3]; |
| 365 } |
| 366 var iter = g28(); |
| 367 assertIteratorResult(1, false, iter.next()); |
| 368 assertIteratorResult(2, false, iter.next()); |
| 369 assertIteratorResult(3, false, iter.next()); |
| 370 assertIteratorResult(undefined, true, iter.next()); |
| 371 })(); |
| 372 |
| 373 (function() { |
| 374 function* g29() { |
| 375 yield* "abc"; |
| 376 } |
| 377 var iter = g29(); |
| 378 assertIteratorResult("a", false, iter.next()); |
| 379 assertIteratorResult("b", false, iter.next()); |
| 380 assertIteratorResult("c", false, iter.next()); |
| 381 assertIteratorResult(undefined, true, iter.next()); |
| 382 })(); |
| 383 |
358 // Generator function instances. | 384 // Generator function instances. |
359 TestGenerator(GeneratorFunction(), | 385 TestGenerator(GeneratorFunction(), |
360 [undefined], | 386 [undefined], |
361 "foo", | 387 "foo", |
362 [undefined]); | 388 [undefined]); |
363 | 389 |
364 TestGenerator(new GeneratorFunction(), | 390 TestGenerator(new GeneratorFunction(), |
365 [undefined], | 391 [undefined], |
366 "foo", | 392 "foo", |
367 [undefined]); | 393 [undefined]); |
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386 "foo", | 412 "foo", |
387 [42, undefined]); | 413 [42, undefined]); |
388 | 414 |
389 // Test that yield* re-yields received results without re-boxing. | 415 // Test that yield* re-yields received results without re-boxing. |
390 function TestDelegatingYield() { | 416 function TestDelegatingYield() { |
391 function results(results) { | 417 function results(results) { |
392 var i = 0; | 418 var i = 0; |
393 function next() { | 419 function next() { |
394 return results[i++]; | 420 return results[i++]; |
395 } | 421 } |
396 return { next: next } | 422 var iter = { next: next }; |
| 423 var ret = {}; |
| 424 ret[Symbol.iterator] = function() { return iter; }; |
| 425 return ret; |
397 } | 426 } |
398 function* yield_results(expected) { | 427 function* yield_results(expected) { |
399 return yield* results(expected); | 428 return yield* results(expected); |
400 } | 429 } |
401 function collect_results(iter) { | 430 function collect_results(iterable) { |
| 431 var iter = iterable[Symbol.iterator](); |
402 var ret = []; | 432 var ret = []; |
403 var result; | 433 var result; |
404 do { | 434 do { |
405 result = iter.next(); | 435 result = iter.next(); |
406 ret.push(result); | 436 ret.push(result); |
407 } while (!result.done); | 437 } while (!result.done); |
408 return ret; | 438 return ret; |
409 } | 439 } |
410 // We have to put a full result for the end, because the return will re-box. | 440 // We have to put a full result for the end, because the return will re-box. |
411 var expected = [{value: 1}, 13, "foo", {value: 34, done: true}]; | 441 var expected = [{value: 1}, 13, "foo", {value: 34, done: true}]; |
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659 function TestThrowRecursion() { | 689 function TestThrowRecursion() { |
660 function* g() { yield iter.throw(1); } | 690 function* g() { yield iter.throw(1); } |
661 var iter = g(); | 691 var iter = g(); |
662 return iter.next(); | 692 return iter.next(); |
663 } | 693 } |
664 assertThrows(TestNextRecursion, Error); | 694 assertThrows(TestNextRecursion, Error); |
665 assertThrows(TestSendRecursion, Error); | 695 assertThrows(TestSendRecursion, Error); |
666 assertThrows(TestThrowRecursion, Error); | 696 assertThrows(TestThrowRecursion, Error); |
667 } | 697 } |
668 TestRecursion(); | 698 TestRecursion(); |
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