diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js')
-rw-r--r-- | js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js b/js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js new file mode 100644 index 0000000000..398da85705 --- /dev/null +++ b/js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-iter-val-array-prototype.js @@ -0,0 +1,56 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-ptrn-elem-id-iter-val-array-prototype.case +// - src/dstr-binding/default/const-stmt.template +/*--- +description: Array destructuring uses overriden Array.prototype[Symbol.iterator] (`const` statement) +esid: sec-let-and-const-declarations-runtime-semantics-evaluation +features: [Symbol.iterator, generators, destructuring-binding] +flags: [generated] +info: | + LexicalBinding : BindingPattern Initializer + + 1. Let rhs be the result of evaluating Initializer. + 2. Let value be GetValue(rhs). + 3. ReturnIfAbrupt(value). + 4. Let env be the running execution context's LexicalEnvironment. + 5. Return the result of performing BindingInitialization for BindingPattern + using value and env as the arguments. + + Runtime Semantics: IteratorBindingInitialization + + SingleNameBinding : BindingIdentifier Initializer_opt + + 1. Let bindingId be StringValue of BindingIdentifier. + 2. Let lhs be ? ResolveBinding(bindingId, environment). + 3. If iteratorRecord.[[Done]] is false, then + a. Let next be IteratorStep(iteratorRecord). + b. If next is an abrupt completion, set iteratorRecord.[[Done]] to true. + c. ReturnIfAbrupt(next). + d. If next is false, set iteratorRecord.[[Done]] to true. + e. Else, + i. Let v be IteratorValue(next). + ii. If v is an abrupt completion, set iteratorRecord.[[Done]] to true. + iii. ReturnIfAbrupt(v). + [...] + 7. Return InitializeReferencedBinding(lhs, v). + +---*/ +Array.prototype[Symbol.iterator] = function* () { + if (this.length > 0) { + yield this[0]; + } + if (this.length > 1) { + yield this[1]; + } + if (this.length > 2) { + yield 42; + } +}; + +const [x, y, z] = [1, 2, 3]; + +assert.sameValue(x, 1); +assert.sameValue(y, 2); +assert.sameValue(z, 42); + +reportCompare(0, 0); |