mirror of https://github.com/tc39/test262.git
34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
esid: sec-evaldeclarationinstantiation
|
|
description: Initialization of new variable binding
|
|
info: |
|
|
[...]
|
|
16. For each String vn in declaredVarNames, in list order do
|
|
a. If varEnvRec is a global Environment Record, then
|
|
[...]
|
|
b. Else,
|
|
i. Let bindingExists be varEnvRec.HasBinding(vn).
|
|
ii. If bindingExists is false, then
|
|
1. Let status be ! varEnvRec.CreateMutableBinding(vn, true).
|
|
2. Assert: status is not an abrupt completion because of
|
|
validation preceding step 12.
|
|
3. Perform ! varEnvRec.InitializeBinding(vn, undefined).
|
|
[...]
|
|
flags: [noStrict]
|
|
---*/
|
|
|
|
var initial = null;
|
|
var postAssignment;
|
|
|
|
(function() {
|
|
eval('initial = x; x = 4; postAssignment = x; var x;');
|
|
}());
|
|
|
|
assert.sameValue(initial, undefined);
|
|
assert.sameValue(postAssignment, 4, 'binding is mutable');
|
|
assert.throws(ReferenceError, function() {
|
|
x;
|
|
});
|