grammar-private-field-optional-chaining.js (1030B)
1 // This file was procedurally generated from the following sources: 2 // - src/class-elements/grammar-private-field-optional-chaining.case 3 // - src/class-elements/default/cls-decl.template 4 /*--- 5 description: PrivateName after '?.' is valid syntax (field definitions in a class declaration) 6 esid: prod-FieldDefinition 7 features: [class-fields-private, optional-chaining, class] 8 flags: [generated] 9 info: | 10 Updated Productions 11 12 OptionalChain[Yield, Await]: 13 `?.` `[` Expression[+In, ?Yield, ?Await] `]` 14 `?.` IdentifierName 15 `?.` Arguments[?Yield, ?Await] 16 `?.` TemplateLiteral[?Yield, ?Await, +Tagged] 17 `?.` PrivateIdentifier 18 19 ---*/ 20 21 22 class C { 23 #m = 'test262'; 24 25 static access(obj) { 26 return obj?.#m; 27 } 28 } 29 30 let c = new C(); 31 32 assert.sameValue(C.access(c), 'test262'); 33 34 assert.sameValue(C.access(null), undefined); 35 assert.sameValue(C.access(undefined), undefined); 36 37 assert.throws(TypeError, function() { 38 C.access({}); 39 }, 'accessed private field from an ordinary object'); 40 41 42 reportCompare(0, 0);