switch-dflt-global-block-scoping.js (1524B)
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/switch-dflt.template 4 /*--- 5 description: A block-scoped binding is created (Funtion declaration in the `default` clause of a `switch` statement in the global scope) 6 esid: sec-web-compat-globaldeclarationinstantiation 7 flags: [generated, noStrict] 8 info: | 9 13.2.14 Runtime Semantics: BlockDeclarationInstantiation 10 11 [...] 12 4. For each element d in declarations do 13 a. For each element dn of the BoundNames of d do 14 i. If IsConstantDeclaration of d is true, then 15 [...] 16 ii. Else, 17 2. Perform ! envRec.CreateMutableBinding(dn, false). 18 19 b. If d is a GeneratorDeclaration production or a FunctionDeclaration 20 production, then 21 i. Let fn be the sole element of the BoundNames of d. 22 ii. Let fo be the result of performing InstantiateFunctionObject for 23 d with argument env. 24 iii. Perform envRec.InitializeBinding(fn, fo). 25 ---*/ 26 var initialBV, currentBV; 27 28 switch (1) { 29 default: 30 function f() { initialBV = f; f = 123; currentBV = f; return 'decl'; } 31 } 32 33 f(); 34 35 assert.sameValue( 36 initialBV(), 37 'decl', 38 'Block-scoped binding value is function object at execution time' 39 ); 40 assert.sameValue(currentBV, 123, 'Block-scoped binding is mutable'); 41 assert.sameValue( 42 f(), 43 'decl', 44 'Block-scoped binding is independent of outer var-scoped binding' 45 ); 46 47 reportCompare(0, 0);