mirror of https://github.com/tc39/test262.git
39 lines
1.4 KiB
JavaScript
39 lines
1.4 KiB
JavaScript
// 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);
|