switch-dflt-func-skip-early-err-switch.js (1413B)
1 // This file was procedurally generated from the following sources: 2 // - src/annex-b-fns/func-skip-early-err-switch.case 3 // - src/annex-b-fns/func/switch-dflt.template 4 /*--- 5 description: Extension not observed when creation of variable binding would produce an early error (switch statement) (Funtion declaration in the `default` 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 ii. If replacing the FunctionDeclaration f with a VariableStatement that 13 has F as a BindingIdentifier would not produce any Early Errors for 14 func and F is not an element of BoundNames of argumentsList, then 15 [...] 16 ---*/ 17 18 (function() { 19 assert.throws(ReferenceError, function() { 20 f; 21 }, 'An initialized binding is not created prior to evaluation'); 22 assert.sameValue( 23 typeof f, 24 'undefined', 25 'An uninitialized binding is not created prior to evaluation' 26 ); 27 28 switch (0) { 29 default: 30 let f; 31 32 switch (1) { 33 default: 34 function f() { } 35 } 36 37 } 38 39 assert.throws(ReferenceError, function() { 40 f; 41 }, 'An initialized binding is not created following evaluation'); 42 assert.sameValue( 43 typeof f, 44 'undefined', 45 'An uninitialized binding is not created following evaluation' 46 ); 47 }()); 48 49 reportCompare(0, 0);