newtarget-proto-custom.js (1764B)
1 // |reftest| shell-option(--enable-explicit-resource-management) skip-if(!(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('explicit-resource-management'))||!xulRuntime.shell) -- explicit-resource-management is not enabled unconditionally, requires shell-options 2 // Copyright (C) 2023 Ron Buckton. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 5 /*--- 6 esid: sec-suppressederror-constructor 7 description: > 8 Use a custom NewTarget prototype 9 info: | 10 SuppressedError ( error, suppressed, message ) 11 12 1. If NewTarget is undefined, let newTarget be the active function object, else let newTarget be NewTarget. 13 2. Let O be ? OrdinaryCreateFromConstructor(newTarget, "%SuppressedError.prototype%", « [[ErrorData]], [[AggregateErrors]] »). 14 ... 15 6. Return O. 16 17 OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] ) 18 19 ... 20 2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto). 21 3. Return ObjectCreate(proto, internalSlotsList). 22 23 GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto ) 24 25 ... 26 3. Let proto be ? Get(constructor, "prototype"). 27 4. If Type(proto) is not Object, then 28 a. Let realm be ? GetFunctionRealm(constructor). 29 b. Set proto to realm's intrinsic object named intrinsicDefaultProto. 30 Return proto. 31 features: [explicit-resource-management, Reflect.construct] 32 ---*/ 33 34 var custom = { x: 42 }; 35 var newt = new Proxy(function() {}, { 36 get(t, p) { 37 if (p === 'prototype') { 38 return custom; 39 } 40 41 return t[p]; 42 } 43 }); 44 45 var obj = Reflect.construct(SuppressedError, [], newt); 46 47 assert.sameValue(Object.getPrototypeOf(obj), custom); 48 assert.sameValue(obj.x, 42); 49 50 reportCompare(0, 0);