array-elem-target-yield-expr.js (1367B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/array-elem-target-yield-expr.case 3 // - src/dstr-assignment/default/assignment-expr.template 4 /*--- 5 description: When a `yield` token appears within the DestructuringAssignmentTarget of an AssignmentElement within a generator function body, it behaves as a YieldExpression. (AssignmentExpression) 6 esid: sec-variable-statement-runtime-semantics-evaluation 7 features: [generators, destructuring-binding] 8 flags: [generated] 9 info: | 10 VariableDeclaration : BindingPattern Initializer 11 12 1. Let rhs be the result of evaluating Initializer. 13 2. Let rval be GetValue(rhs). 14 3. ReturnIfAbrupt(rval). 15 4. Return the result of performing BindingInitialization for 16 BindingPattern passing rval and undefined as arguments. 17 ---*/ 18 var value = [33]; 19 var x = {}; 20 var iterationResult, iter; 21 22 iter = (function*() { 23 24 var result; 25 var vals = [33]; 26 27 result = [ x[yield] ] = vals; 28 29 30 31 assert.sameValue(result, vals); 32 33 }()); 34 35 iterationResult = iter.next(); 36 37 assert.sameValue(iterationResult.value, undefined); 38 assert.sameValue(iterationResult.done, false); 39 assert.sameValue(x.prop, undefined); 40 41 iterationResult = iter.next('prop'); 42 43 assert.sameValue(iterationResult.value, undefined); 44 assert.sameValue(iterationResult.done, true); 45 assert.sameValue(x.prop, 33); 46 47 reportCompare(0, 0);