Delphi Compiler Error
E2539 Missing implementation for abstract method ‘%s.%s’
Reason for the Error & Solution
This occurs when you fail to implement abstract methods in a derived class that is also declared sealed (can no longer be derived from).
program E2539;
{E2539 Missing implementation for abstract method '%s.%s'}
{$APPTYPE CONSOLE}
uses
SysUtils;
type
MyClass = class abstract
public
procedure MyAbstract (a:integer; s: string); virtual; abstract;
end;
MyDerivClass = class sealed(MyClass)
public
end;
var
MyObj: MyDerivClass;
begin
MyObj := MyDerivClass.Create;
end.
