mirror of https://github.com/tc39/test262.git
71 lines
2.3 KiB
JavaScript
71 lines
2.3 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.
|
||
/*---
|
||
es6id: 13.12.11
|
||
description: Completion value when only the final case matches
|
||
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 : { CaseClauses }
|
||
|
||
1. Let V = undefined.
|
||
2. Let A be the List of CaseClause items in CaseClauses, in source text
|
||
order.
|
||
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
|
||
1. If clauseSelector.[[value]] is empty, return
|
||
Completion{[[type]]: clauseSelector.[[type]], [[value]]:
|
||
undefined, [[target]]: clauseSelector.[[target]]}.
|
||
2. Else, return Completion(clauseSelector).
|
||
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]].
|
||
iii. If R is an abrupt completion, return Completion(UpdateEmpty(R,
|
||
V)).
|
||
5. Return NormalCompletion(V).
|
||
---*/
|
||
|
||
assert.sameValue(
|
||
eval('1; switch ("a") { case "a": }'),
|
||
undefined,
|
||
'empty StatementList (lone case)'
|
||
);
|
||
assert.sameValue(
|
||
eval('2; switch ("a") { case "a": 3; }'),
|
||
3,
|
||
'non-empy StatementList (lone case)'
|
||
);
|
||
assert.sameValue(
|
||
eval('4; switch ("b") { case "a": case "b": }'),
|
||
undefined,
|
||
'empty StatementList (following an empty case)'
|
||
);
|
||
assert.sameValue(
|
||
eval('5; switch ("b") { case "a": case "b": 6; }'),
|
||
6,
|
||
'non-empty StatementList (following an empty case)'
|
||
);
|
||
assert.sameValue(
|
||
eval('7; switch ("b") { case "a": 8; case "b": }'),
|
||
undefined,
|
||
'empty StatementList (following a non-empty case)'
|
||
);
|
||
assert.sameValue(
|
||
eval('9; switch ("b") { case "a": 10; case "b": 11; }'),
|
||
11,
|
||
'non-empty StatementList (following a non-empty case)'
|
||
);
|