==== tests/cases/compiler/callOverloads2.ts (5 errors) ====
    
    
    class Foo {    
        bar1() { /*WScript.Echo("bar1");*/ }
    
        constructor(x: any) {
            // WScript.Echo("Constructor function has executed");
        }
    }
    
    function Foo();
             ~~~
!!! Duplicate identifier 'Foo'.
    
    function F1(s:string) {return s;}
             ~~
!!! Function implementation name must be 'Foo'.
    function F1(a:any) { return a;} // error -  duplicate identifier
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! Duplicate function implementation.
    
    function Goo(s:string); // error - no implementation
             ~~~
!!! Function implementation is missing or not immediately following the declaration.
    
    declare function Gar(s:String); // expect no error
    
    var f1 = new Foo("hey");
    
    
    f1.bar1();
    Foo();
    ~~~~~
!!! Value of type 'typeof Foo' is not callable. Did you mean to include 'new'?