Delphi Compiler Error
E2208 Interface ‘%s’ already implemented by ‘%s’
Reason for the Error & Solution
The class specified by name2 has specified the interface name1 more than once in the inheritance section of the class definition.
program Produce;
type
IBaseIntf = interface
end;
TBaseClass = class (TInterfacedObject, IBaseIntf, IBaseIntf)
end;
begin
end.
In this example, the IBaseIntf interface is specified multiple times in the inheritance section of the definition of TBaseClass. As a class can not implement the same interface more than once, this cause the compiler to emit the error message.
program Solve;
type
IBaseIntf = interface
end;
TBaseClass = class (TInterfacedObject, IBaseIntf)
end;
begin
end.
The only solution to this error message is to ensure that a particular interface appears no more than once in the inheritance section of a class definition.
