62 строки
1.5 KiB
JavaScript
62 строки
1.5 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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// RUN: %hermes %s | %FileCheck --match-full-lines %s
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// RUN: %hermes -O0 %s | %FileCheck --match-full-lines %s
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/// This tests the behaviour of the interpreter when the same register is
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/// allocated for both the operand and result of IteratorBegin. A correct
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/// implementation should ensure that the register holds the result value after
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/// the instruction has executed.
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function foo() {
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return {
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[Symbol.iterator]() {
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return {
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return() {
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print('RETURN');
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return {}
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},
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next() {
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print('next');
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return { done: true, value: undefined };
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}
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}
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}
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}
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}
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function main() {
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const iteratorVar = foo();
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let [] = iteratorVar;
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for (const i of iteratorVar) {}
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print(2);
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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for (const i of iteratorVar) {}
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}
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main();
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// CHECK: RETURN
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// CHECK-NEXT: next
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// CHECK-NEXT: 2
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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// CHECK-NEXT: next
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