obj-rest-order.js (1615B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/obj-rest-order.case 3 // - src/dstr-assignment/default/for-of.template 4 /*--- 5 description: Rest operation follows [[OwnPropertyKeys]] order (For..of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [Symbol, object-rest, destructuring-binding] 8 flags: [generated] 9 includes: [compareArray.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 rest; 29 var calls = []; 30 var o = { get z() { calls.push('z') }, get a() { calls.push('a') } }; 31 Object.defineProperty(o, 1, { get: () => { calls.push(1) }, enumerable: true }); 32 Object.defineProperty(o, Symbol('foo'), { get: () => { calls.push("Symbol(foo)") }, enumerable: true }); 33 34 var counter = 0; 35 36 for ({...rest} of [o]) { 37 assert.compareArray(calls, [1, 'z', 'a', "Symbol(foo)"]); 38 assert.sameValue(Object.keys(rest).length, 3); 39 counter += 1; 40 } 41 42 assert.sameValue(counter, 1); 43 44 reportCompare(0, 0);