diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-ary-empty-init.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-ary-empty-init.js | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-ary-empty-init.js b/js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-ary-empty-init.js new file mode 100644 index 0000000000..0b7d99fda1 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-ary-empty-init.js @@ -0,0 +1,66 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-ptrn-elem-ary-empty-init.case +// - src/dstr-binding/default/for-of-const.template +/*--- +description: BindingElement with array binding pattern and initializer is used (for-of statement) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [generators, destructuring-binding] +flags: [generated] +info: | + IterationStatement : + for ( ForDeclaration of AssignmentExpression ) Statement + + [...] + 3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, + lexicalBinding, labelSet). + + 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation + + [...] + 3. Let destructuring be IsDestructuring of lhs. + [...] + 5. Repeat + [...] + h. If destructuring is false, then + [...] + i. Else + i. If lhsKind is assignment, then + [...] + ii. Else if lhsKind is varBinding, then + [...] + iii. Else, + 1. Assert: lhsKind is lexicalBinding. + 2. Assert: lhs is a ForDeclaration. + 3. Let status be the result of performing BindingInitialization + for lhs passing nextValue and iterationEnv as arguments. + [...] + + 13.3.3.6 Runtime Semantics: IteratorBindingInitialization + + BindingElement : BindingPatternInitializer opt + + [...] + 2. If iteratorRecord.[[done]] is true, let v be undefined. + 3. If Initializer is present and v is undefined, then + a. Let defaultValue be the result of evaluating Initializer. + b. Let v be ? GetValue(defaultValue). + 4. Return the result of performing BindingInitialization of BindingPattern + with v and environment as the arguments. + +---*/ +var initCount = 0; +var iterCount = 0; +var iter = function*() { iterCount += 1; }(); + +var iterCount = 0; + +for (const [[] = function() { initCount += 1; return iter; }()] of [[]]) { + assert.sameValue(initCount, 1); + assert.sameValue(iterCount, 0); + + iterCount += 1; +} + +assert.sameValue(iterCount, 1, 'iteration occurred as expected'); + +reportCompare(0, 0); |