tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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lgcl-and-assignment-operator.js (1927B)

      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 And Assignment Operator
      7 info: |
      8    AssignmentExpression:
      9      LeftHandSideExpression &&= AssignmentExpression
     10 
     11    1. Let lref be the result of evaluating LeftHandSideExpression.
     12    2. Let lval be ? GetValue(lref).
     13    3. Let lbool be ! ToBoolean(lval).
     14    4. If lbool is false, return lval.
     15    5. Let rref be the result of evaluating AssignmentExpression.
     16    6. Let rval be ? GetValue(rref).
     17    7. Perform ? PutValue(lref, rval).
     18    8. Return rval.
     19 features: [logical-assignment-operators]
     20 
     21 ---*/
     22 
     23 var value = undefined;
     24 assert.sameValue(value &&= 1, undefined, "(value &&= 1) === undefined; where value = undefined");
     25 
     26 value = null;
     27 assert.sameValue(value &&= 1, null, "(value &&= 1) === null where value = null");
     28 
     29 value = false;
     30 assert.sameValue(value &&= 1, false, "(value &&= 1) === false; where value = false");
     31 
     32 value = 0;
     33 assert.sameValue(value &&= 1, 0, "(value &&= 1) === 0; where value = 0");
     34 
     35 value = -0;
     36 assert.sameValue(value &&= 1, -0, "(value &&= 1) === -0; where value = -0");
     37 
     38 value = NaN;
     39 assert.sameValue(value &&= 1, NaN, "(value &&= 1) === NaN; where value = NaN");
     40 
     41 value = "";
     42 assert.sameValue(value &&= 1, "", '(value &&= 1) === "" where value = ""');
     43 
     44 
     45 
     46 value = true;
     47 assert.sameValue(value &&= 1, 1, "(value &&= 1) === 1; where value = true");
     48 
     49 value = 2;
     50 assert.sameValue(value &&= 1, 1, "(value &&= 1) === 1; where value = 2");
     51 
     52 value = "test";
     53 assert.sameValue(value &&= 1, 1, '(value &&= 1) === 1; where value = "test"');
     54 
     55 var sym = Symbol("");
     56 value = sym;
     57 assert.sameValue(value &&= 1, 1, "(value &&= 1) === 1; where value = Symbol()");
     58 
     59 var obj = {};
     60 value = obj;
     61 assert.sameValue(value &&= 1, 1, "(value &&= 1) === 1; where value = {}");
     62 
     63 reportCompare(0, 0);