tests/cases/compiler/ParameterList7.ts(2,14): error TS2369: A parameter property is only allowed in a constructor implementation. tests/cases/compiler/ParameterList7.ts(3,14): error TS2369: A parameter property is only allowed in a constructor implementation. ==== tests/cases/compiler/ParameterList7.ts (2 errors) ==== class C1 { constructor(public p1:string); // ERROR ~~~~~~~~~~~~~~~~ !!! error TS2369: A parameter property is only allowed in a constructor implementation. constructor(private p2:number); // ERROR ~~~~~~~~~~~~~~~~~ !!! error TS2369: A parameter property is only allowed in a constructor implementation. constructor(public p3:any) {} // OK }