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Diffstat (limited to 'js/src/tests/test262/language/statements/for/dstr/var-ary-ptrn-elision.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for/dstr/var-ary-ptrn-elision.js | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for/dstr/var-ary-ptrn-elision.js b/js/src/tests/test262/language/statements/for/dstr/var-ary-ptrn-elision.js new file mode 100644 index 0000000000..2a811a9707 --- /dev/null +++ b/js/src/tests/test262/language/statements/for/dstr/var-ary-ptrn-elision.js @@ -0,0 +1,70 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-ptrn-elision.case +// - src/dstr-binding/default/for-var.template +/*--- +description: Elision advances iterator (for statement) +esid: sec-for-statement-runtime-semantics-labelledevaluation +features: [generators, destructuring-binding] +flags: [generated] +info: | + IterationStatement : + for ( var VariableDeclarationList ; Expressionopt ; Expressionopt ) Statement + + 1. Let varDcl be the result of evaluating VariableDeclarationList. + [...] + + 13.3.2.4 Runtime Semantics: Evaluation + + VariableDeclarationList : VariableDeclarationList , VariableDeclaration + + 1. Let next be the result of evaluating VariableDeclarationList. + 2. ReturnIfAbrupt(next). + 3. Return the result of evaluating VariableDeclaration. + + VariableDeclaration : BindingPattern Initializer + + 1. Let rhs be the result of evaluating Initializer. + 2. Let rval be GetValue(rhs). + 3. ReturnIfAbrupt(rval). + 4. Return the result of performing BindingInitialization for BindingPattern + passing rval and undefined as arguments. + + 13.3.3.6 Runtime Semantics: IteratorBindingInitialization + + ArrayBindingPattern : [ Elision ] + + 1. Return the result of performing + IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord + as the argument. + + 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation + + Elision : , + + 1. If iteratorRecord.[[done]] is false, then + a. Let next be IteratorStep(iteratorRecord.[[iterator]]). + 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. + 2. Return NormalCompletion(empty). + +---*/ +var first = 0; +var second = 0; +function* g() { + first += 1; + yield; + second += 1; +}; + +var iterCount = 0; + +for (var [,] = g(); iterCount < 1; ) { + assert.sameValue(first, 1); + assert.sameValue(second, 0); + iterCount += 1; +} + +assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); + +reportCompare(0, 0); |