JSTests/test262/test/annexB/language/function-code/if-decl-else-stmt-func-init.js

// This file was procedurally generated from the following sources:
// - src/annex-b-fns/func-init.case
// - src/annex-b-fns/func/if-decl-else-stmt.template
/*---
description: Variable binding is initialized to `undefined` in outer scope (IfStatement with a declaration in the first statement position in function scope)
esid: sec-functiondeclarations-in-ifstatement-statement-clauses
flags: [generated, noStrict]
info: |
    The following rules for IfStatement augment those in 13.6:

    IfStatement[Yield, Return]:
        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else Statement[?Yield, ?Return]
        if ( Expression[In, ?Yield] ) Statement[?Yield, ?Return] else FunctionDeclaration[?Yield]
        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield] else FunctionDeclaration[?Yield]
        if ( Expression[In, ?Yield] ) FunctionDeclaration[?Yield]


    B.3.3.1 Changes to FunctionDeclarationInstantiation

    [...]
    2. If instantiatedVarNames does not contain F, then
       a. Perform ! varEnvRec.CreateMutableBinding(F, false).
       b. Perform varEnvRec.InitializeBinding(F, undefined).
       c. Append F to instantiatedVarNames.
    [...]
---*/
var init, changed;

(function() {
  init = f;
  f = 123;
  changed = f;

  if (true) function f() {  } else ;

  
}());

assert.sameValue(init, undefined, 'binding is initialized to `undefined`');
assert.sameValue(changed, 123, 'binding is mutable');
assert.throws(ReferenceError, function() {
  f;
}, 'global binding is not created');