==== tests/cases/compiler/indexTypeCheck.ts (8 errors) ====
    interface Red {
    	[n:number]; // ok
    	~~~~~~~~~~
!!! An index signature must have a type annotation.
    	[s:string]; // ok
    	~~~~~~~~~~
!!! An index signature must have a type annotation.
    }
    
    interface Blue {
    	[n:number]: any; // ok
    	[s:string]: any; // ok
    }
    
    interface Yellow {
    	[n:number]: Red; // ok
    	[s:string]: Red; // ok
    }
    
    interface Orange {
    	[n:number]: number; // ok
    	~~~~~~~~~~~~~~~~~~~
!!! Numeric index type 'number' is not assignable to string index type 'string'.
    	[s:string]: string; // error
    }
    
    interface Green {
    	[n:number]: Orange; // error
    	~~~~~~~~~~~~~~~~~~~
!!! Numeric index type 'Orange' is not assignable to string index type 'Yellow'.
    	[s:string]: Yellow; // ok
    }
    
    interface Cyan {
    	[n:number]: number; // error
    	~~~~~~~~~~~~~~~~~~~
!!! Numeric index type 'number' is not assignable to string index type 'string'.
    	[s:string]: string; // ok
    }
    
    interface Purple {
    	[n:number, s:string]; // error
    	 ~
!!! An index signature must have exactly one parameter.
    }
    
    interface Magenta {
    	[p:Purple]; // error
    	 ~
!!! An index signature parameter type must be 'string' or 'number'.
    }
    
    var yellow: Yellow;
    var blue: Blue;
    var s = "some string";
    
    yellow[5]; // ok
    yellow["hue"]; // ok
    yellow[<any>{}]; // ok
    
    s[0]; // error
    s["s"]; // ok
    s[<any>{}]; // ok
    
    yellow[blue]; // error
    ~~~~~~~~~~~~
!!! An index expression argument must be of type 'string', 'number', or 'any'.
    
    var x:number[];
    x[0];
    
    class Benchmark {
    
        public results: { [x:string]: any; } = <{ [x:string]: any; }>{};
    
        public addTimingFor(name: string, timing: number) {
            this.results[name] = this.results[name];
        }
    }