==== tests/cases/conformance/expressions/binaryOperators/instanceofOperator/instanceofOperatorWithInvalidOperands.ts (21 errors) ====
    class C {
        foo() { }
    }
    
    var x: any;
    
    // invalid left operand
    // the left operand is required to be of type Any, an object type, or a type parameter type
    var a1: number;
    var a2: boolean;
    var a3: string;
    var a4: void;
    
    var ra1 = a1 instanceof x;
              ~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra2 = a2 instanceof x;
              ~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra3 = a3 instanceof x;
              ~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra4 = a4 instanceof x;
              ~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra5 = 0 instanceof x;
              ~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra6 = true instanceof x;
              ~~~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra7 = '' instanceof x;
              ~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra8 = null instanceof x;
              ~~~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    var ra9 = undefined instanceof x;
              ~~~~~~~~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
    
    // invalid right operand
    // the right operand to be of type Any or a subtype of the 'Function' interface type
    var b1: number;
    var b2: boolean;
    var b3: string;
    var b4: void;
    var o1: {};
    var o2: Object;
    var o3: C;
    
    var rb1 = x instanceof b1;
                           ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb2 = x instanceof b2;
                           ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb3 = x instanceof b3;
                           ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb4 = x instanceof b4;
                           ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb5 = x instanceof 0;
                           ~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb6 = x instanceof true;
                           ~~~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb7 = x instanceof '';
                           ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb8 = x instanceof o1;
                           ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb9 = x instanceof o2;
                           ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    var rb10 = x instanceof o3;
                            ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.
    
    // both operands are invalid
    var rc1 = '' instanceof {};
              ~~
!!! The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.
                            ~~
!!! The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.