tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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parse-rest-destructuring-parameter.js (886B)

      1 // |reftest| skip-if(!xulRuntime.shell)
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 function funArgs(params) {
      7    return Reflect.parse(`function f(${params}) {}`).body[0].rest;
      8 }
      9 
     10 var arrayRest = funArgs("...[]");
     11 assertEq(arrayRest.type, "ArrayPattern");
     12 assertEq(arrayRest.elements.length, 0);
     13 
     14 arrayRest = funArgs("...[a]");
     15 assertEq(arrayRest.type, "ArrayPattern");
     16 assertEq(arrayRest.elements.length, 1);
     17 
     18 var objectRest = funArgs("...{}");
     19 assertEq(objectRest.type, "ObjectPattern");
     20 assertEq(objectRest.properties.length, 0);
     21 
     22 objectRest = funArgs("...{p: a}");
     23 assertEq(objectRest.type, "ObjectPattern");
     24 assertEq(objectRest.properties.length, 1);
     25 
     26 if (typeof reportCompare === "function")
     27    reportCompare(0, 0);