switch-case-func-existing-block-fn-update.js (1384B)
1 // This file was procedurally generated from the following sources: 2 // - src/annex-b-fns/func-existing-block-fn-update.case 3 // - src/annex-b-fns/func/switch-case.template 4 /*--- 5 description: Variable-scoped binding is updated (Function declaration in the `case` clause of a `switch` statement in function scope) 6 esid: sec-web-compat-functiondeclarationinstantiation 7 flags: [generated, noStrict] 8 info: | 9 B.3.3.1 Changes to FunctionDeclarationInstantiation 10 11 [...] 12 3. When the FunctionDeclaration f is evaluated, perform the following steps 13 in place of the FunctionDeclaration Evaluation algorithm provided in 14 14.1.21: 15 a. Let fenv be the running execution context's VariableEnvironment. 16 b. Let fenvRec be fenv's EnvironmentRecord. 17 c. Let benv be the running execution context's LexicalEnvironment. 18 d. Let benvRec be benv's EnvironmentRecord. 19 e. Let fobj be ! benvRec.GetBindingValue(F, false). 20 f. Perform ! fenvRec.SetMutableBinding(F, fobj, false). 21 g. Return NormalCompletion(empty). 22 ---*/ 23 var updated; 24 25 (function() { 26 { 27 function f() { 28 return 'first declaration'; 29 } 30 } 31 32 switch (1) { 33 case 1: 34 function f() { return 'second declaration'; } 35 } 36 37 updated = f; 38 }()); 39 40 assert.sameValue(typeof updated, 'function'); 41 assert.sameValue(updated(), 'second declaration'); 42 43 reportCompare(0, 0);