mirror of https://github.com/tc39/test262.git
81 lines
3.0 KiB
JavaScript
81 lines
3.0 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 execution continues through multiple cases and ends
|
||
with an empty abrupt 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
|
||
[...]
|
||
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
|
||
a. Repeat for each CaseClause C in B
|
||
i. If foundInB is false, then
|
||
1. Let clauseSelector be the result of CaseSelectorEvaluation of
|
||
C.
|
||
2. If clauseSelector is an abrupt completion, then
|
||
a. If clauseSelector.[[value]] is empty, return
|
||
Completion{[[type]]: clauseSelector.[[type]], [[value]]:
|
||
undefined, [[target]]: clauseSelector.[[target]]}.
|
||
b. Else, return Completion(clauseSelector).
|
||
3. Let foundInB be the result of performing Strict Equality
|
||
Comparison input === clauseSelector.[[value]].
|
||
ii. If foundInB is true, then
|
||
1. Let R be the result of evaluating CaseClause C.
|
||
2. If R.[[value]] is not empty, let V = R.[[value]].
|
||
3. If R is an abrupt completion, return
|
||
Completion(UpdateEmpty(R, V)).
|
||
---*/
|
||
|
||
assert.sameValue(
|
||
eval('1; switch ("a") { default: case "a": 2; case "b": 3; break; }'),
|
||
3,
|
||
'Non-empty value replaces previous non-empty value'
|
||
);
|
||
assert.sameValue(
|
||
eval('4; switch ("a") { default: case "a": case "b": 5; break; }'),
|
||
5,
|
||
'Non-empty value replaces empty value'
|
||
);
|
||
assert.sameValue(
|
||
eval('6; switch ("a") { default: case "a": 7; case "b": break; }'),
|
||
7,
|
||
'Empty value does not replace previous non-empty value'
|
||
);
|
||
|
||
assert.sameValue(
|
||
eval('8; do { switch ("a") { default: case "a": 9; case "b": 10; continue; } } while (false)'),
|
||
10,
|
||
'Non-empty value replaces previous non-empty value'
|
||
);
|
||
assert.sameValue(
|
||
eval('11; do { switch ("a") { default: case "a": case "b": 12; continue; } } while (false)'),
|
||
12,
|
||
'Non-empty value replaces empty value'
|
||
);
|
||
assert.sameValue(
|
||
eval('13; do { switch ("a") { default: case "a": 14; case "b": continue; } } while (false)'),
|
||
14,
|
||
'Empty value does not replace previous non-empty value'
|
||
);
|