obj-rest-computed-property.js (1763B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/obj-rest-computed-property.case 3 // - src/dstr-assignment/default/for-of.template 4 /*--- 5 description: Destructuring field can be a computed property, i.e it can be defined only at runtime. Rest operantion needs to skip these properties as well. (For..of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [object-rest, destructuring-binding] 8 flags: [generated] 9 includes: [propertyHelper.js] 10 info: | 11 IterationStatement : 12 for ( LeftHandSideExpression of AssignmentExpression ) Statement 13 14 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », 15 AssignmentExpression, iterate). 16 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, 17 keyResult, assignment, labelSet). 18 19 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 20 21 [...] 22 4. If destructuring is true and if lhsKind is assignment, then 23 a. Assert: lhs is a LeftHandSideExpression. 24 b. Let assignmentPattern be the parse of the source text corresponding to 25 lhs using AssignmentPattern as the goal symbol. 26 [...] 27 ---*/ 28 var a = "foo"; 29 var b, rest; 30 31 var counter = 0; 32 33 for ({[a]:b, ...rest} of [{ foo: 1, bar: 2, baz: 3 }]) { 34 assert.sameValue(b, 1); 35 assert.sameValue(rest.bar, 2); 36 assert.sameValue(rest.baz, 3); 37 38 assert.sameValue(Object.getOwnPropertyDescriptor(rest, "foo"), undefined); 39 40 verifyProperty(rest, "bar", { 41 enumerable: true, 42 writable: true, 43 configurable: true 44 }); 45 46 verifyProperty(rest, "baz", { 47 enumerable: true, 48 writable: true, 49 configurable: true 50 }); 51 52 counter += 1; 53 } 54 55 assert.sameValue(counter, 1); 56 57 reportCompare(0, 0);