==== tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/classExtendingPrimitive.ts (11 errors) ====
    // classes cannot extend primitives
    
    class C extends number { }
                    ~~~~~~
!!! Cannot find name 'number'.
    class C2 extends string { }
                     ~~~~~~
!!! Cannot find name 'string'.
    class C3 extends boolean { }
                     ~~~~~~~
!!! Cannot find name 'boolean'.
    class C4 extends Void  { }
                     ~~~~
!!! Cannot find name 'Void'.
    class C4a extends void {}
                      ~~~~
!!! Identifier expected.
    class C5 extends Null { }
                     ~~~~
!!! Cannot find name 'Null'.
    class C5a extends null { }
                      ~~~~
!!! Identifier expected.
                           ~
!!! ';' expected.
    class C6 extends undefined { }
                     ~~~~~~~~~
!!! Cannot find name 'undefined'.
    class C7 extends Undefined { }
                     ~~~~~~~~~
!!! Cannot find name 'Undefined'.
    
    enum E { A }
    class C8 extends E { }
                     ~
!!! A class may only extend another class.