==== tests/cases/compiler/assignmentCompatability_checking-call-member-off-of-function-interface.ts (8 errors) ====
    // 3.8.4 Assignment Compatibility 
    
    interface Callable {
        call(blah: any); // also works for 'apply'
    }
    
    var x: Callable;
    
    // Should fail
    x = '';
    ~
!!! Type 'string' is not assignable to type 'Callable':
!!!   Property 'call' is missing in type 'String'.
    x = [''];
    ~
!!! Type 'string[]' is not assignable to type 'Callable':
!!!   Property 'call' is missing in type 'string[]'.
    x = 4;
    ~
!!! Type 'number' is not assignable to type 'Callable':
!!!   Property 'call' is missing in type 'Number'.
    x = {};
    ~
!!! Type '{}' is not assignable to type 'Callable':
!!!   Property 'call' is missing in type '{}'.
    
    // Should work
    function f() { };
    x = f;
    
    function fn(c: Callable) { }
    
    // Should Fail
    fn('');
       ~~
!!! Argument of type 'string' is not assignable to parameter of type 'Callable'.
    fn(['']);
       ~~~~
!!! Argument of type 'string[]' is not assignable to parameter of type 'Callable'.
    fn(4);
       ~
!!! Argument of type 'number' is not assignable to parameter of type 'Callable'.
    fn({});
       ~~
!!! Argument of type '{}' is not assignable to parameter of type 'Callable'.
!!!   Property 'call' is missing in type '{}'.
    
    
    // Should work
    fn(a => { });