dflt-params-ref-later.js (1438B)
1 // This file was procedurally generated from the following sources: 2 // - src/function-forms/dflt-params-ref-later.case 3 // - src/function-forms/error/async-gen-func-decl.template 4 /*--- 5 description: Referencing a parameter that occurs later in the ParameterList (async generator function declaration) 6 esid: sec-asyncgenerator-definitions-instantiatefunctionobject 7 features: [default-parameters, async-iteration] 8 flags: [generated] 9 info: | 10 AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier 11 ( FormalParameters ) { AsyncGeneratorBody } 12 13 [...] 14 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, 15 scope, strict). 16 [...] 17 18 19 14.1.19 Runtime Semantics: IteratorBindingInitialization 20 21 FormalsList : FormalsList , FormalParameter 22 23 1. Let status be the result of performing IteratorBindingInitialization for 24 FormalsList using iteratorRecord and environment as the arguments. 25 2. ReturnIfAbrupt(status). 26 3. Return the result of performing IteratorBindingInitialization for 27 FormalParameter using iteratorRecord and environment as the arguments. 28 29 ---*/ 30 var x = 0; 31 32 33 var callCount = 0; 34 async function* f(x = y, y) { 35 36 callCount = callCount + 1; 37 } 38 39 assert.throws(ReferenceError, function() { 40 f(); 41 }); 42 43 assert.sameValue(callCount, 0, 'generator function body not evaluated'); 44 45 reportCompare(0, 0);