obj-rest-same-name.js (1565B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/obj-rest-same-name.case 3 // - src/dstr-assignment/default/for-of.template 4 /*--- 5 description: Proper setting in the values for rest name equal to a property name. (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 info: | 10 IterationStatement : 11 for ( LeftHandSideExpression of AssignmentExpression ) Statement 12 13 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », 14 AssignmentExpression, iterate). 15 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, 16 keyResult, assignment, labelSet). 17 18 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 19 20 [...] 21 4. If destructuring is true and if lhsKind is assignment, then 22 a. Assert: lhs is a LeftHandSideExpression. 23 b. Let assignmentPattern be the parse of the source text corresponding to 24 lhs using AssignmentPattern as the goal symbol. 25 [...] 26 ---*/ 27 var o = { 28 x: 42, 29 y: 39, 30 z: 'cheeseburger' 31 }; 32 33 var x, y, z; 34 35 var counter = 0; 36 37 for ({ x, ...z } of [o]) { 38 assert.sameValue(x, 42); 39 assert.sameValue(y, undefined); 40 assert.sameValue(z.y, 39); 41 assert.sameValue(z.z, 'cheeseburger'); 42 43 var keys = Object.getOwnPropertyNames(z); 44 assert.sameValue(keys.length, 2); 45 assert.sameValue(keys[0], 'y'); 46 assert.sameValue(keys[1], 'z'); 47 counter += 1; 48 } 49 50 assert.sameValue(counter, 1); 51 52 reportCompare(0, 0);