tor-browser

The Tor Browser
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computed-name-toprimitive.js (3194B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/class-elements/computed-name-toprimitive.case
      3 // - src/class-elements/default/cls-decl.template
      4 /*---
      5 description: ToPrimitive evaluation in the ComputedPropertyName (field definitions in a class declaration)
      6 esid: prod-FieldDefinition
      7 features: [class-fields-public, computed-property-names, Symbol.toPrimitive, class]
      8 flags: [generated]
      9 includes: [propertyHelper.js]
     10 info: |
     11    Runtime Semantics: ClassDefinitionEvaluation
     12 
     13    ...
     14    27. For each ClassElement e in order from elements
     15      a. If IsStatic of me is false, then
     16        i. Let fields be the result of performing ClassElementEvaluation for e with arguments proto and false.
     17      b. Else,
     18        i. Let fields be the result of performing ClassElementEvaluation for e with arguments F and false.
     19      c. If fields is an abrupt completion, then
     20        i. Set the running execution context's LexicalEnvironment to lex.
     21        ii. Set the running execution context's PrivateNameEnvironment to outerPrivateEnvironment.
     22        iii. Return Completion(status).
     23    ...
     24 
     25    Runtime Semantics: ClassElementEvaluation
     26 
     27    ClassElement: FieldDefinition;
     28      Return ClassFieldDefinitionEvaluation of FieldDefinition with parameter false and object.
     29 
     30    Runtime Semantics: ClassFieldDefinitionEvaluation
     31      With parameters isStatic and homeObject.
     32 
     33    1. Let fieldName be the result of evaluating ClassElementName.
     34    2. ReturnIfAbrupt(fieldName).
     35    ...
     36 
     37    Runtime Semantics: Evaluation
     38      ComputedPropertyName: [ AssignmentExpression ]
     39 
     40    1. Let exprValue be the result of evaluating AssignmentExpression.
     41    2. Let propName be ? GetValue(exprValue).
     42    3. Return ? ToPropertyKey(propName).
     43 
     44 ---*/
     45 var err = function() { throw new Test262Error(); };
     46 var obj1 = {
     47  [Symbol.toPrimitive]: function() { return "d"; },
     48  toString: err,
     49  valueOf: err
     50 };
     51 
     52 var obj2 = {
     53  toString: function() { return "e"; },
     54  valueOf: err
     55 };
     56 
     57 var obj3 = {
     58  toString: undefined,
     59  valueOf: function() { return "f"; }
     60 };
     61 
     62 
     63 
     64 class C {
     65  [obj1] = 42;
     66  [obj2] = 43;
     67  [obj3] = 44;
     68 }
     69 
     70 var c = new C();
     71 
     72 assert(
     73  !Object.prototype.hasOwnProperty.call(C.prototype, "d"),
     74  "d doesn't appear as an own property on C prototype"
     75 );
     76 assert(
     77  !Object.prototype.hasOwnProperty.call(C, "d"),
     78  "d doesn't appear as an own property on C constructor"
     79 );
     80 
     81 verifyProperty(c, "d", {
     82  value: 42,
     83  enumerable: true,
     84  writable: true,
     85  configurable: true
     86 });
     87 
     88 assert(
     89  !Object.prototype.hasOwnProperty.call(C.prototype, "e"),
     90  "e doesn't appear as an own property on C prototype"
     91 );
     92 assert(
     93  !Object.prototype.hasOwnProperty.call(C, "e"),
     94  "e doesn't appear as an own property on C constructor"
     95 );
     96 
     97 verifyProperty(c, "e", {
     98  value: 43,
     99  enumerable: true,
    100  writable: true,
    101  configurable: true
    102 });
    103 
    104 assert(
    105  !Object.prototype.hasOwnProperty.call(C.prototype, "f"),
    106  "f doesn't appear as an own property on C prototype"
    107 );
    108 assert(!
    109  Object.prototype.hasOwnProperty.call(C, "f"),
    110  "f doesn't appear as an own property on C constructor"
    111 );
    112 
    113 verifyProperty(c, "f", {
    114  value: 44,
    115  enumerable: true,
    116  writable: true,
    117  configurable: true
    118 });
    119 
    120 reportCompare(0, 0);