src/class-elements/computed-name-toprimitive-err.case

// Copyright (C) 2017 Leo Balter. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
desc: Custom error evaluating a computed property name
info: |
  Runtime Semantics: ClassDefinitionEvaluation

  ...
  27. For each ClassElement e in order from elements
    a. If IsStatic of me is false, then
      i. Let fields be the result of performing ClassElementEvaluation for e with arguments proto and false.
    b. Else,
      i. Let fields be the result of performing ClassElementEvaluation for e with arguments F and false.
    c. If fields is an abrupt completion, then
      i. Set the running execution context's LexicalEnvironment to lex.
      ii. Set the running execution context's PrivateNameEnvironment to outerPrivateEnvironment.
      iii. Return Completion(status).
  ...

  Runtime Semantics: ClassElementEvaluation

  ClassElement: FieldDefinition;
    Return ClassFieldDefinitionEvaluation of FieldDefinition with parameter false and object.

  Runtime Semantics: ClassFieldDefinitionEvaluation
    With parameters isStatic and homeObject.

  1. Let fieldName be the result of evaluating ClassElementName.
  2. ReturnIfAbrupt(fieldName).
  ...

  Runtime Semantics: Evaluation
    ComputedPropertyName: [ AssignmentExpression ]
  
  1. Let exprValue be the result of evaluating AssignmentExpression.
  2. Let propName be ? GetValue(exprValue).
  3. Return ? ToPropertyKey(propName).
template: class-evaluation-error
features: [class-fields-public, computed-property-names, Symbol.toPrimitive]
---*/

//- setup
var obj = {
  [Symbol.toPrimitive]: function() {
    throw new Test262Error();
  }
};

//- elements
[obj]
//- error
Test262Error