| // This file was procedurally generated from the following sources: |
| // - src/async-generators/yield-star-sync-return.case |
| // - src/async-generators/default/async-class-decl-method.template |
| /*--- |
| description: execution order for yield* with sync iterator and return() (Async Generator method as a ClassDeclaration element) |
| esid: prod-AsyncGeneratorMethod |
| features: [Symbol.iterator, async-iteration, Symbol.asyncIterator] |
| flags: [generated, async] |
| info: | |
| ClassElement : |
| MethodDefinition |
| |
| MethodDefinition : |
| AsyncGeneratorMethod |
| |
| Async Generator Function Definitions |
| |
| AsyncGeneratorMethod : |
| async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody } |
| |
| |
| YieldExpression: yield * AssignmentExpression |
| |
| ... |
| 6. Repeat |
| ... |
| c. Else, |
| i. Assert: received.[[Type]] is return. |
| ii. Let return be ? GetMethod(iterator, "return"). |
| iii. If return is undefined, return Completion(received). |
| iv. Let innerReturnResult be ? Call(return, iterator, |
| « received.[[Value]] »). |
| v. If generatorKind is async, then set innerReturnResult to |
| ? Await(innerReturnResult). |
| ... |
| vii. Let done be ? IteratorComplete(innerReturnResult). |
| viii. If done is true, then |
| 1. Let value be ? IteratorValue(innerReturnResult). |
| 2. Return Completion{[[Type]]: return, [[Value]]: value, |
| [[Target]]: empty}. |
| ix. Let received be GeneratorYield(innerResult). |
| |
| %AsyncFromSyncIteratorPrototype%.return ( value ) |
| |
| 5. Let return be GetMethod(syncIterator, "return"). |
| ... |
| ... |
| 8. Let returnResult be Call(return, syncIterator, « value »). |
| ... |
| 11. Let returnValue be IteratorValue(returnResult). |
| .. |
| 13. Let returnDone be IteratorComplete(returnResult). |
| ... |
| 16. Perform ! Call(valueWrapperCapability.[[Resolve]], undefined, « returnValue »). |
| ... |
| 18. Set onFulfilled.[[Done]] to returnDone. |
| 19. Perform ! PerformPromiseThen(valueWrapperCapability.[[Promise]], |
| onFulfilled, undefined, promiseCapability). |
| ... |
| |
| ---*/ |
| var log = []; |
| var obj = { |
| [Symbol.iterator]() { |
| var returnCount = 0; |
| return { |
| name: "syncIterator", |
| get next() { |
| log.push({ name: "get next" }); |
| return function() { |
| return { |
| value: "next-value-1", |
| done: false |
| }; |
| }; |
| }, |
| get return() { |
| log.push({ |
| name: "get return", |
| thisValue: this |
| }); |
| return function() { |
| log.push({ |
| name: "call return", |
| thisValue: this, |
| args: [...arguments] |
| }); |
| |
| returnCount++; |
| if (returnCount == 1) { |
| return { |
| name: "return-result-1", |
| get value() { |
| log.push({ |
| name: "get return value (1)", |
| thisValue: this |
| }); |
| return "return-value-1"; |
| }, |
| get done() { |
| log.push({ |
| name: "get return done (1)", |
| thisValue: this |
| }); |
| return false; |
| } |
| }; |
| } |
| |
| return { |
| name: "return-result-2", |
| get value() { |
| log.push({ |
| name: "get return value (2)", |
| thisValue: this |
| }); |
| return "return-value-2"; |
| }, |
| get done() { |
| log.push({ |
| name: "get return done (2)", |
| thisValue: this |
| }); |
| return true; |
| } |
| }; |
| }; |
| } |
| }; |
| } |
| }; |
| |
| |
| |
| var callCount = 0; |
| |
| class C { async *gen() { |
| callCount += 1; |
| log.push({ name: "before yield*" }); |
| yield* obj; |
| |
| }} |
| |
| var gen = C.prototype.gen; |
| |
| var iter = gen(); |
| |
| assert.sameValue(log.length, 0, "log.length"); |
| |
| iter.next().then(v => { |
| assert.sameValue(log[0].name, "before yield*"); |
| |
| assert.sameValue(log[1].name, "get next"); |
| |
| assert.sameValue(v.value, "next-value-1"); |
| assert.sameValue(v.done, false); |
| |
| assert.sameValue(log.length, 2, "log.length"); |
| |
| iter.return("return-arg-1").then(v => { |
| assert.sameValue(log[2].name, "get return"); |
| assert.sameValue(log[2].thisValue.name, "syncIterator", "get return thisValue"); |
| |
| assert.sameValue(log[3].name, "call return"); |
| assert.sameValue(log[3].thisValue.name, "syncIterator", "return thisValue"); |
| assert.sameValue(log[3].args.length, 1, "return args.length"); |
| assert.sameValue(log[3].args[0], "return-arg-1", "return args[0]"); |
| |
| assert.sameValue(log[4].name, "get return done (1)"); |
| assert.sameValue(log[4].thisValue.name, "return-result-1", "get return done thisValue"); |
| |
| assert.sameValue(log[5].name, "get return value (1)"); |
| assert.sameValue(log[5].thisValue.name, "return-result-1", "get return value thisValue"); |
| |
| assert.sameValue(v.value, "return-value-1"); |
| assert.sameValue(v.done, false); |
| |
| assert.sameValue(log.length, 6, "log.length"); |
| |
| iter.return().then(v => { |
| assert.sameValue(log[6].name, "get return"); |
| assert.sameValue(log[6].thisValue.name, "syncIterator", "get return thisValue"); |
| |
| assert.sameValue(log[7].name, "call return"); |
| assert.sameValue(log[7].thisValue.name, "syncIterator", "get return thisValue"); |
| assert.sameValue(log[7].args.length, 1, "return args.length"); |
| assert.sameValue(log[7].args[0], undefined, "return args[0]"); |
| |
| assert.sameValue(log[8].name, "get return done (2)"); |
| assert.sameValue(log[8].thisValue.name, "return-result-2", "get return done thisValue"); |
| |
| assert.sameValue(log[9].name, "get return value (2)"); |
| assert.sameValue(log[9].thisValue.name, "return-result-2", "get return value thisValue"); |
| |
| assert.sameValue(v.value, "return-value-2"); |
| assert.sameValue(v.done, true); |
| |
| assert.sameValue(log.length, 10, "log.length"); |
| }).then($DONE, $DONE); |
| }).catch($DONE); |
| }).catch($DONE); |
| |
| assert.sameValue(callCount, 1); |