mirror of https://github.com/tc39/test262.git
47 lines
1.4 KiB
JavaScript
47 lines
1.4 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-switch-statement-runtime-semantics-evaluation
|
|
description: Removal of lexical environment (from `default` clause)
|
|
info: |
|
|
1. Let exprRef be the result of evaluating Expression.
|
|
2. Let switchValue be ? GetValue(exprRef).
|
|
3. Let oldEnv be the running execution context's LexicalEnvironment.
|
|
4. Let blockEnv be NewDeclarativeEnvironment(oldEnv).
|
|
5. Perform BlockDeclarationInstantiation(CaseBlock, blockEnv).
|
|
6. Set the running execution context's LexicalEnvironment to blockEnv.
|
|
7. Let R be the result of performing CaseBlockEvaluation of CaseBlock with
|
|
argument switchValue.
|
|
[...]
|
|
features: [let]
|
|
---*/
|
|
|
|
let x = 'outside';
|
|
var probeDefault, probeDefaultBeforeCase, probeCase;
|
|
|
|
switch (null) {
|
|
default:
|
|
let x = 'inside';
|
|
probeDefault = function() { return x; };
|
|
}
|
|
|
|
assert.sameValue(probeDefault(), 'inside', 'from lone `default` clause`');
|
|
assert.sameValue(x, 'outside');
|
|
|
|
switch (null) {
|
|
default:
|
|
let x = 'inside';
|
|
probeDefaultBeforeCase = function() { return x; };
|
|
case 0:
|
|
probeCase = function() { return x; };
|
|
}
|
|
|
|
assert.sameValue(
|
|
probeDefaultBeforeCase(),
|
|
'inside',
|
|
'from `default` clause preceeding `case` clause'
|
|
);
|
|
assert.sameValue(
|
|
probeCase(), 'inside', 'from `case` clause following `default` clause'
|
|
);
|