prop-expr-cls-val.js (1430B)
1 // Copyright (C) 2016 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 esid: sec-super-keyword 5 es6id: 12.3.5 6 description: Value of reference returned by SuperProperty 7 info: | 8 [...] 9 4. If the code matched by the syntactic production that is being evaluated is 10 strict mode code, let strict be true, else let strict be false. 11 5. Return ? MakeSuperPropertyReference(propertyKey, strict). 12 13 12.3.5.3 Runtime Semantics: MakeSuperPropertyReference 14 15 1. Let env be GetThisEnvironment( ). 16 2. If env.HasSuperBinding() is false, throw a ReferenceError exception. 17 3. Let actualThis be ? env.GetThisBinding(). 18 4. Let baseValue be ? env.GetSuperBase(). 19 5. Let bv be ? RequireObjectCoercible(baseValue). 20 6. Return a value of type Reference that is a Super Reference whose base 21 value component is bv, whose referenced name component is propertyKey, 22 whose thisValue component is actualThis, and whose strict reference flag 23 is strict. 24 features: [class] 25 ---*/ 26 27 var fromA, fromB; 28 class A {} 29 class B extends A {} 30 class C extends B { 31 method() { 32 fromA = super['fromA']; 33 fromB = super['fromB']; 34 } 35 } 36 37 A.prototype.fromA = 'a'; 38 A.prototype.fromB = 'a'; 39 B.prototype.fromB = 'b'; 40 C.prototype.fromA = 'c'; 41 C.prototype.fromB = 'c'; 42 43 C.prototype.method(); 44 45 assert.sameValue(fromA, 'a'); 46 assert.sameValue(fromB, 'b'); 47 48 reportCompare(0, 0);