tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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cptn-dflt-final.js (2155B)

      1 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 es6id: 13.12.11
      5 description: Completion value when the default case matches and is final
      6 info: |
      7    SwitchStatement : switch ( Expression ) CaseBlock
      8 
      9    [...]
     10    8. Let R be the result of performing CaseBlockEvaluation of CaseBlock with
     11       argument switchValue.
     12    9. Set the running execution context’s LexicalEnvironment to oldEnv.
     13    10. Return R.
     14 
     15    13.12.9 Runtime Semantics: CaseBlockEvaluation
     16 
     17    CaseBlock : { CaseClauses }
     18 
     19    1. Let V = undefined.
     20    2. Let A be the list of CaseClause items in the first CaseClauses, in
     21       source text order. If the first CaseClauses is not present A is « ».
     22    3. Let found be false.
     23    4. Repeat for each CaseClause C in A
     24       [...]
     25    5. Let foundInB be false.
     26    6. Let B be the List containing the CaseClause items in the second
     27       CaseClauses, in source text order. If the second CaseClauses is not
     28       present B is « ».
     29    7. If found is false, then
     30       a. Repeat for each CaseClause C in B
     31       [...]
     32    8. If foundInB is true, return NormalCompletion(V).
     33    9. Let R be the result of evaluating DefaultClause.
     34    10. If R.[[value]] is not empty, let V = R.[[value]].
     35    [...]
     36    13. Return NormalCompletion(V).
     37 ---*/
     38 
     39 assert.sameValue(
     40  eval('1; switch ("a") { default: }'),
     41  undefined,
     42  'empty StatementList (lone case)'
     43 );
     44 assert.sameValue(
     45  eval('2; switch ("a") { default: 3; }'),
     46  3,
     47  'non-empy StatementList (lone case)'
     48 );
     49 assert.sameValue(
     50  eval('4; switch ("b") { case "a": default: }'),
     51  undefined,
     52  'empty StatementList (following an empty case)'
     53 );
     54 assert.sameValue(
     55  eval('5; switch ("b") { case "a": default: 6; }'),
     56  6,
     57  'non-empty StatementList (following an empty case)'
     58 );
     59 assert.sameValue(
     60  eval('7; switch ("b") { case "a": 8; default: }'),
     61  undefined,
     62  'empty StatementList (following a non-empty case)'
     63 );
     64 assert.sameValue(
     65  eval('9; switch ("b") { case "a": 10; default: 11; }'),
     66  11,
     67  'non-empty StatementList (following a non-empty case)'
     68 );
     69 
     70 reportCompare(0, 0);