| // Copyright (C) 2019 Aleksey Shvayka. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-getfunctionrealm |
| description: > |
| The realm of a Proxy exotic object is the realm of its target function. |
| GetFunctionRealm is called recursively. |
| info: | |
| Boolean ( value ) |
| |
| [...] |
| 3. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%Boolean.prototype%", « [[BooleanData]] »). |
| [...] |
| 5. Return O. |
| |
| OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] ) |
| |
| [...] |
| 2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto). |
| 3. Return OrdinaryObjectCreate(proto, internalSlotsList). |
| |
| GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto ) |
| |
| [...] |
| 3. Let proto be ? Get(constructor, "prototype"). |
| 4. If Type(proto) is not Object, then |
| a. Let realm be ? GetFunctionRealm(constructor). |
| b. Set proto to realm's intrinsic object named intrinsicDefaultProto. |
| 5. Return proto. |
| |
| GetFunctionRealm ( obj ) |
| |
| [...] |
| 2. If obj has a [[Realm]] internal slot, then |
| a. Return obj.[[Realm]]. |
| [...] |
| 4. If obj is a Proxy exotic object, then |
| [...] |
| b. Let proxyTarget be obj.[[ProxyTarget]]. |
| c. Return ? GetFunctionRealm(proxyTarget). |
| features: [cross-realm, Reflect, Proxy] |
| ---*/ |
| |
| var realm1 = $262.createRealm().global; |
| var realm2 = $262.createRealm().global; |
| var realm3 = $262.createRealm().global; |
| var realm4 = $262.createRealm().global; |
| |
| var newTarget = new realm1.Function(); |
| newTarget.prototype = null; |
| |
| var newTargetProxy = new realm2.Proxy(newTarget, {}); |
| var newTargetProxyProxy = new realm3.Proxy(newTargetProxy, {}); |
| var boolean = Reflect.construct(realm4.Boolean, [], newTargetProxyProxy); |
| |
| assert(boolean instanceof realm1.Boolean); |
| assert.sameValue(Object.getPrototypeOf(boolean), realm1.Boolean.prototype); |