| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-id.case |
| // - src/dstr-binding/default/for-var.template |
| /*--- |
| description: Lone rest element (for statement) |
| esid: sec-for-statement-runtime-semantics-labelledevaluation |
| features: [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 |
| BindingRestElement : ... BindingIdentifier |
| [...] 3. Let A be ArrayCreate(0). [...] 5. Repeat |
| [...] |
| f. Let status be CreateDataProperty(A, ToString (n), nextValue). |
| [...] |
| ---*/ |
| var values = [1, 2, 3]; |
| |
| var iterCount = 0; |
| |
| for (var [...x] = values; iterCount < 1; ) { |
| assert(Array.isArray(x)); |
| assert.sameValue(x.length, 3); |
| assert.sameValue(x[0], 1); |
| assert.sameValue(x[1], 2); |
| assert.sameValue(x[2], 3); |
| assert.notSameValue(x, values); |
| iterCount += 1; |
| } |
| |
| assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); |