tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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switch-dflt-global-skip-early-err-block.js (1268B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/annex-b-fns/global-skip-early-err-block.case
      3 // - src/annex-b-fns/global/switch-dflt.template
      4 /*---
      5 description: Extension not observed when creation of variable binding would produce an early error (Block statement) (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    B.3.3.2 Changes to GlobalDeclarationInstantiation
     10 
     11    [...]
     12    b. If replacing the FunctionDeclaration f with a VariableStatement that has
     13       F as a BindingIdentifier would not produce any Early Errors for script,
     14       then
     15    [...]
     16 ---*/
     17 assert.throws(ReferenceError, function() {
     18  f;
     19 }, 'An initialized binding is not created prior to evaluation');
     20 assert.sameValue(
     21  typeof f,
     22  'undefined',
     23  'An uninitialized binding is not created prior to evaluation'
     24 );
     25 
     26 {
     27 let f = 123;
     28 
     29 switch (1) {
     30  default:
     31    function f() {  }
     32 }
     33 
     34 }
     35 
     36 assert.throws(ReferenceError, function() {
     37  f;
     38 }, 'An initialized binding is not created following evaluation');
     39 assert.sameValue(
     40  typeof f,
     41  'undefined',
     42  'An uninitialized binding is not created following evaluation'
     43 );
     44 
     45 reportCompare(0, 0);