if-decl-else-stmt-global-block-scoping.js (1983B)
1 // This file was procedurally generated from the following sources: 2 // - src/annex-b-fns/global-block-scoping.case 3 // - src/annex-b-fns/global/if-decl-else-stmt.template 4 /*--- 5 description: A block-scoped binding is created (IfStatement with a declaration in the first statement position in the global 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 13.2.14 Runtime Semantics: BlockDeclarationInstantiation 19 20 [...] 21 4. For each element d in declarations do 22 a. For each element dn of the BoundNames of d do 23 i. If IsConstantDeclaration of d is true, then 24 [...] 25 ii. Else, 26 2. Perform ! envRec.CreateMutableBinding(dn, false). 27 28 b. If d is a GeneratorDeclaration production or a FunctionDeclaration 29 production, then 30 i. Let fn be the sole element of the BoundNames of d. 31 ii. Let fo be the result of performing InstantiateFunctionObject for 32 d with argument env. 33 iii. Perform envRec.InitializeBinding(fn, fo). 34 ---*/ 35 var initialBV, currentBV; 36 37 if (true) function f() { initialBV = f; f = 123; currentBV = f; return 'decl'; } else ; 38 39 f(); 40 41 assert.sameValue( 42 initialBV(), 43 'decl', 44 'Block-scoped binding value is function object at execution time' 45 ); 46 assert.sameValue(currentBV, 123, 'Block-scoped binding is mutable'); 47 assert.sameValue( 48 f(), 49 'decl', 50 'Block-scoped binding is independent of outer var-scoped binding' 51 ); 52 53 reportCompare(0, 0);