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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.
/*---
es6id: 13.12.11
description: >
Completion value when execution continues through multiple cases and ends
with a normal completion
info: |
SwitchStatement : switch ( Expression ) CaseBlock
[...]
8. Let R be the result of performing CaseBlockEvaluation of CaseBlock with
argument switchValue.
9. Set the running execution context’s LexicalEnvironment to oldEnv.
10. Return R.
13.12.9 Runtime Semantics: CaseBlockEvaluation
CaseBlock : { CaseClausesopt DefaultClause CaseClausesopt }
1. Let V = undefined.
2. Let A be the list of CaseClause items in the first CaseClauses, in
source text order. If the first CaseClauses is not present A is « ».
3. Let found be false.
4. Repeat for each CaseClause C in A
a. If found is false, then
i. Let clauseSelector be the result of CaseSelectorEvaluation of C.
ii. If clauseSelector is an abrupt completion, then
[...]
iii. Let found be the result of performing Strict Equality Comparison
input === clauseSelector.[[value]].
b. If found is true, then
i. Let R be the result of evaluating C.
ii. If R.[[value]] is not empty, let V = R.[[value]].
[...]
5. Let foundInB be false.
6. Let B be the List containing the CaseClause items in the second
CaseClauses, in source text order. If the second CaseClauses is not
present B is « ».
7. If found is false, then
[...]
[...]
9. Let R be the result of evaluating DefaultClause.
10. If R.[[value]] is not empty, let V = R.[[value]].
11. If R is an abrupt completion, return Completion(UpdateEmpty(R, V)).
12. Repeat for each CaseClause C in B (NOTE this is another complete
iteration of the second CaseClauses)
[...]
13. Return NormalCompletion(V).
---*/
assert.sameValue(
eval('1; switch ("a") { case "a": 2; default: 3; }'),
3,
'Non-empty value replaces previous non-empty value'
);
assert.sameValue(
eval('4; switch ("a") { case "a": default: 5; }'),
5,
'Non-empty value replaces empty value'
);
assert.sameValue(
eval('6; switch ("a") { case "a": 7; default: }'),
7,
'Empty value does not replace previous non-empty value'
);
reportCompare(0, 0);