obj-rest-to-property.js (1468B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/obj-rest-to-property.case 3 // - src/dstr-assignment/default/for-of.template 4 /*--- 5 description: When DestructuringAssignmentTarget is an object property, its value should be binded as rest object. (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 src = {}; 29 30 var counter = 0; 31 32 for ({...src.y} of [{ x: 1, y: 2}]) { 33 assert.sameValue(src.y.x, 1); 34 assert.sameValue(src.y.y, 2); 35 36 verifyProperty(src, "y", { 37 enumerable: true, 38 writable: true, 39 configurable: true 40 }); 41 counter += 1; 42 } 43 44 assert.sameValue(counter, 1); 45 46 reportCompare(0, 0);