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Diffstat (limited to 'js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js')
-rw-r--r-- | js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js new file mode 100644 index 0000000000..64234cc410 --- /dev/null +++ b/js/src/tests/test262/language/expressions/function/dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js @@ -0,0 +1,83 @@ +// 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/func-expr-dflt.template +/*--- +description: Array destructuring uses overriden Array.prototype[Symbol.iterator] (function expression (default parameter)) +esid: sec-function-definitions-runtime-semantics-evaluation +features: [Symbol.iterator, generators, destructuring-binding, default-parameters] +flags: [generated] +info: | + FunctionExpression : function ( FormalParameters ) { FunctionBody } + + [...] + 3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody, + scope, strict). + [...] + + 9.2.1 [[Call]] ( thisArgument, argumentsList) + + [...] + 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). + [...] + + 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) + + 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). + [...] + + 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) + + [...] + 23. Let iteratorRecord be Record {[[iterator]]: + CreateListIterator(argumentsList), [[done]]: false}. + 24. If hasDuplicates is true, then + [...] + 25. Else, + b. Let formalStatus be IteratorBindingInitialization for formals with + iteratorRecord and env as 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; + } +}; + +var callCount = 0; +var f; +f = function([x, y, z] = [1, 2, 3]) { + assert.sameValue(x, 1); + assert.sameValue(y, 2); + assert.sameValue(z, 42); + callCount = callCount + 1; +}; + +f(); +assert.sameValue(callCount, 1, 'function invoked exactly once'); + +reportCompare(0, 0); |