tor-browser

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lgcl-or-assignment-operator-bigint.js (945B)

      1 // Copyright (c) 2020 Ecma International.  All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-assignment-operators-runtime-semantics-evaluation
      6 description: Logical Or Assignment Operator
      7 features: [BigInt, logical-assignment-operators]
      8 info: |
      9    AssignmentExpression:
     10      LeftHandSideExpression ||= AssignmentExpression
     11 
     12    1. Let lref be the result of evaluating LeftHandSideExpression.
     13    2. Let lval be ? GetValue(lref).
     14    3. Let lbool be ! ToBoolean(lval).
     15    4. If lbool is true, return lval.
     16    5. Let rref be the result of evaluating AssignmentExpression.
     17    6. Let rval be ? GetValue(rref).
     18    7. Perform ? PutValue(lref, rval).
     19    8. Return rval.
     20 
     21 ---*/
     22 
     23 var value = 0n;
     24 assert.sameValue(value ||= 1n, 1n, "(value ||= 1n) === 1n; where value = 0n");
     25 
     26 value = 2n;
     27 assert.sameValue(value ||= 1n, 2n, "(value ||= 1n) === 2n; where value = 2n");
     28 
     29 reportCompare(0, 0);