| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-id-elision.case |
| // - src/dstr-binding/default/const-stmt.template |
| /*--- |
| description: Rest element following elision elements (`const` statement) |
| esid: sec-let-and-const-declarations-runtime-semantics-evaluation |
| features: [destructuring-binding] |
| flags: [generated] |
| info: | |
| LexicalBinding : BindingPattern Initializer |
| |
| 1. Let rhs be the result of evaluating Initializer. |
| 2. Let value be GetValue(rhs). |
| 3. ReturnIfAbrupt(value). |
| 4. Let env be the running execution context's LexicalEnvironment. |
| 5. Return the result of performing BindingInitialization for BindingPattern |
| using value and env as the arguments. |
| |
| 13.3.3.6 Runtime Semantics: IteratorBindingInitialization |
| ArrayBindingPattern : [ Elisionopt BindingRestElement ] |
| 1. If Elision is present, then |
| a. Let status be the result of performing |
| IteratorDestructuringAssignmentEvaluation of Elision with |
| iteratorRecord as the argument. |
| b. ReturnIfAbrupt(status). |
| 2. Return the result of performing IteratorBindingInitialization for |
| BindingRestElement with iteratorRecord and environment as arguments. |
| ---*/ |
| var values = [1, 2, 3, 4, 5]; |
| |
| const [ , , ...x] = values; |
| |
| assert(Array.isArray(x)); |
| assert.sameValue(x.length, 3); |
| assert.sameValue(x[0], 3); |
| assert.sameValue(x[1], 4); |
| assert.sameValue(x[2], 5); |
| assert.notSameValue(x, values); |