dflt-params-ref-later.js (1931B)
1 // This file was procedurally generated from the following sources: 2 // - src/function-forms/dflt-params-ref-later.case 3 // - src/function-forms/error/arrow-function.template 4 /*--- 5 description: Referencing a parameter that occurs later in the ParameterList (arrow function expression) 6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation 7 features: [default-parameters] 8 flags: [generated] 9 info: | 10 ArrowFunction : ArrowParameters => ConciseBody 11 12 [...] 13 4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict). 14 [...] 15 16 9.2.1 [[Call]] ( thisArgument, argumentsList) 17 18 [...] 19 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). 20 [...] 21 22 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) 23 24 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). 25 [...] 26 27 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) 28 29 [...] 30 23. Let iteratorRecord be Record {[[iterator]]: 31 CreateListIterator(argumentsList), [[done]]: false}. 32 24. If hasDuplicates is true, then 33 [...] 34 25. Else, 35 b. Let formalStatus be IteratorBindingInitialization for formals with 36 iteratorRecord and env as arguments. 37 [...] 38 39 14.1.19 Runtime Semantics: IteratorBindingInitialization 40 41 FormalsList : FormalsList , FormalParameter 42 43 1. Let status be the result of performing IteratorBindingInitialization for 44 FormalsList using iteratorRecord and environment as the arguments. 45 2. ReturnIfAbrupt(status). 46 3. Return the result of performing IteratorBindingInitialization for 47 FormalParameter using iteratorRecord and environment as the arguments. 48 49 ---*/ 50 var x = 0; 51 52 var callCount = 0; 53 var f; 54 f = (x = y, y) => { 55 56 callCount = callCount + 1; 57 }; 58 59 assert.throws(ReferenceError, function() { 60 f(); 61 }); 62 assert.sameValue(callCount, 0, 'arrow function body not evaluated'); 63 64 reportCompare(0, 0);