==== tests/cases/compiler/parseTypes.ts (4 errors) ====
    
    var x = <() => number>null;
    var y = <{(): number; }>null;
    var z = <{new(): number; }>null
    var w = <{[x:number]: number; }>null
    function f() { return 3 };
    function g(s: string) { true };
    y=f;
    y=g;
    ~
!!! Type '(s: string) => void' is not assignable to type '() => number'.
    x=g;
    ~
!!! Type '(s: string) => void' is not assignable to type '() => number'.
    w=g;
    ~
!!! Type '(s: string) => void' is not assignable to type '{ [x: number]: number; }':
!!!   Index signature is missing in type '(s: string) => void'.
    z=g;
    ~
!!! Type '(s: string) => void' is not assignable to type 'new () => number'.