// 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);