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// 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 preceding `case` clause'
);
assert.sameValue(
probeCase(), 'inside', 'from `case` clause following `default` clause'
);
reportCompare(0, 0);
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