Difference between revisions of "Interfaces"

From Lazarus wiki
Jump to navigationJump to search
m (Added links; updated syntax highlighting)
(Distinguish from "interface".)
Line 1: Line 1:
Interfaces can be utilized as an alternative solution to the need of multiple inheritance, which Object Pascal currently does not support.
+
Interfaces can be utilized as an alternative solution to the need of multiple inheritance, which Object Pascal currently does not support. These are distinct from the '''interface''' reserved word.
  
 
==Full example program==
 
==Full example program==

Revision as of 13:40, 25 February 2020

Interfaces can be utilized as an alternative solution to the need of multiple inheritance, which Object Pascal currently does not support. These are distinct from the interface reserved word.

Full example program

program project1;

{$mode delphi}
{$interfaces corba}

type
  IMyDelegate = interface
    procedure DoThis (value: integer);
  end;

  TMyClass = class (TInterfacedObject, IMyDelegate)
    procedure DoThis (value: integer);
  end;

procedure TestDelegate;
var
  delegate: TMyClass;
  intfdelegate: IMyDelegate;
begin
  delegate := TMyClass.Create;
  intfdelegate := IMyDelegate(delegate);
  intfdelegate.DoThis(1);
end;

{ TMyClass }

procedure TMyClass.DoThis(value: integer);
var
  Str: string;
begin
  WriteLn('Success!!! Type <enter> to continue');
  ReadLn(Str);
end;

begin
  TestDelegate;
end.

See also