tests/cases/conformance/classes/classDeclarations/classImplementsMergedClassInterface.ts(9,7): error TS2720: Class 'C2' incorrectly implements class 'C1'. Did you mean to extend 'C1' and inherit its members as a subclass?
  Type 'C2' is missing the following properties from type 'C1': x, y
tests/cases/conformance/classes/classDeclarations/classImplementsMergedClassInterface.ts(12,7): error TS2720: Class 'C3' incorrectly implements class 'C1'. Did you mean to extend 'C1' and inherit its members as a subclass?
  Property 'y' is missing in type 'C3' but required in type 'C1'.
tests/cases/conformance/classes/classDeclarations/classImplementsMergedClassInterface.ts(16,7): error TS2720: Class 'C4' incorrectly implements class 'C1'. Did you mean to extend 'C1' and inherit its members as a subclass?
  Property 'x' is missing in type 'C4' but required in type 'C1'.


==== tests/cases/conformance/classes/classDeclarations/classImplementsMergedClassInterface.ts (3 errors) ====
    declare class C1 {
        x : number;
    }
    
    interface C1 {
        y : number;
    }
    
    class C2 implements C1 { // error -- missing x
          ~~
!!! error TS2720: Class 'C2' incorrectly implements class 'C1'. Did you mean to extend 'C1' and inherit its members as a subclass?
!!! error TS2720:   Type 'C2' is missing the following properties from type 'C1': x, y
    }
    
    class C3 implements C1 { // error -- missing y
          ~~
!!! error TS2720: Class 'C3' incorrectly implements class 'C1'. Did you mean to extend 'C1' and inherit its members as a subclass?
!!! error TS2720:   Property 'y' is missing in type 'C3' but required in type 'C1'.
!!! related TS2728 tests/cases/conformance/classes/classDeclarations/classImplementsMergedClassInterface.ts:6:5: 'y' is declared here.
        x : number;
    }
    
    class C4 implements C1 { // error -- missing x
          ~~
!!! error TS2720: Class 'C4' incorrectly implements class 'C1'. Did you mean to extend 'C1' and inherit its members as a subclass?
!!! error TS2720:   Property 'x' is missing in type 'C4' but required in type 'C1'.
!!! related TS2728 tests/cases/conformance/classes/classDeclarations/classImplementsMergedClassInterface.ts:2:5: 'x' is declared here.
        y : number;
    }
    
    class C5 implements C1 { // okay
        x : number;
        y : number;
    }