mirror of https://github.com/tc39/test262.git
33 lines
1.4 KiB
JavaScript
33 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: Retainment of existing variable environment (`case` 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.
|
|
[...]
|
|
flags: [noStrict]
|
|
---*/
|
|
|
|
var probeExpr, probeSelector, probeStmt;
|
|
var probeBefore = function() { return x; };
|
|
|
|
switch (eval('var x = 1;'), probeExpr = function() { return x; }, null) {
|
|
case eval('var x = 2;'), probeSelector = function() { return x; }, null:
|
|
probeStmt = function() { return x; };
|
|
var x = 3;
|
|
}
|
|
|
|
assert.sameValue(probeBefore(), 3, 'reference preceding statement');
|
|
assert.sameValue(probeExpr(), 3, 'reference from first Expression');
|
|
assert.sameValue(probeSelector(), 3, 'reference from "selector" Expression');
|
|
assert.sameValue(probeStmt(), 3, 'reference from Statement position');
|
|
assert.sameValue(x, 3, 'reference following statement');
|