if-decl-else-decl-a-func-skip-early-err.js (1527B)
1 // This file was procedurally generated from the following sources: 2 // - src/annex-b-fns/func-skip-early-err.case 3 // - src/annex-b-fns/func/if-decl-else-decl-a.template 4 /*--- 5 description: Extension not observed when creation of variable binding would produce an early error (IfStatement with a declaration in both statement positions in function scope) 6 esid: sec-functiondeclarations-in-ifstatement-statement-clauses 7 flags: [generated, noStrict] 8 info: | 9 The following rules for IfStatement augment those in 13.6: 10 11 IfStatement[Yield, Return]: 12 if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else Statement[?Yield, ?Return] 13 if ( Expression[In, ?Yield] ) Statement[?Yield, ?Return] else FunctionDeclaration[?Yield] 14 if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else FunctionDeclaration[?Yield] 15 if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] 16 17 18 B.3.3.1 Changes to FunctionDeclarationInstantiation 19 20 [...] 21 ii. If replacing the FunctionDeclaration f with a VariableStatement that 22 has F as a BindingIdentifier would not produce any Early Errors for 23 func and F is not an element of BoundNames of argumentsList, then 24 [...] 25 ---*/ 26 var init, after; 27 28 (function() { 29 let f = 123; 30 init = f; 31 32 if (true) function f() { } else function _f() {} 33 34 after = f; 35 }()); 36 37 assert.sameValue(init, 123, 'binding is not initialized to `undefined`'); 38 assert.sameValue(after, 123, 'value is not updated following evaluation'); 39 40 reportCompare(0, 0);