left-hand-side-private-reference-method-short-circuit-nullish.js (2036B)
1 // This file was procedurally generated from the following sources: 2 // - src/logical-assignment-private/nullish.case 3 // - src/logical-assignment-private/default/method-short-circuit.template 4 /*--- 5 description: Nullish-coalescing assignment with target being a private reference (to a private method (short-circuit version)) 6 esid: sec-assignment-operators-runtime-semantics-evaluation 7 features: [class-fields-private, logical-assignment-operators] 8 flags: [generated] 9 info: | 10 sec-property-accessors-runtime-semantics-evaluation 11 MemberExpression : MemberExpression `.` PrivateIdentifier 12 13 1. Let _baseReference_ be the result of evaluating |MemberExpression|. 14 2. Let _baseValue_ be ? GetValue(_baseReference_). 15 3. Let _fieldNameString_ be the StringValue of |PrivateIdentifier|. 16 4. Return ! MakePrivateReference(_baseValue_, _fieldNameString_). 17 18 PutValue (V, W) 19 ... 20 5.b. If IsPrivateReference(_V_) is *true*, then 21 i. Return ? PrivateSet(_baseObj_, _V_.[[ReferencedName]], _W_). 22 23 PrivateSet (O, P, value) 24 ... 25 4. Else if _entry_.[[Kind]] is ~method~, then 26 a. Throw a *TypeError* exception. 27 28 29 sec-assignment-operators-runtime-semantics-evaluation 30 AssignmentExpression : LeftHandSideExpression ??= AssignmentExpression 31 1. Let _lref_ be the result of evaluating |LeftHandSideExpression|. 32 2. Let _lval_ be ? GetValue(_lref_). 33 3. If _lval_ is neither *undefined* nor *null*, return _lval_. 34 ... 35 6. Perform ? PutValue(_lref_, _rval_). 36 7. Return _rval_. 37 ---*/ 38 39 40 function doNotCall() { 41 throw new Test262Error("The right-hand side should not be evaluated"); 42 } 43 44 class C { 45 #privateMethod() {} 46 compoundAssignment() { 47 return this.#privateMethod ??= doNotCall(); 48 } 49 getPrivateMethodFunctionObject() { 50 return this.#privateMethod; 51 } 52 } 53 54 const o = new C(); 55 assert.sameValue(o.compoundAssignment(), o.getPrivateMethodFunctionObject(), "The expression should evaluate to the short-circuit value"); 56 57 reportCompare(0, 0);