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Delegates: Difference between revisions
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return 0;
}</lang>
=={{header|Delphi}}==
Translation of the Java example found at [http://en.wikipedia.org/wiki/Delegation_pattern Wikipedia].
<lang Delphi>
unit Printer;
interface
type
// the "delegate"
TRealPrinter = class
public
procedure Print;
end;
// the "delegator"
TPrinter = class
private
FPrinter: TRealPrinter;
public
constructor Create;
destructor Destroy; override;
procedure Print;
end;
implementation
{ TRealPrinter }
procedure TRealPrinter.Print;
begin
Writeln('Something...');
end;
{ TPrinter }
constructor TPrinter.Create;
begin
inherited Create;
FPrinter:= TRealPrinter.Create;
end;
destructor TPrinter.Destroy;
begin
FPrinter.Free;
inherited;
end;
procedure TPrinter.Print;
begin
FPrinter.Print;
end;
end.
----
program Delegate;
{$APPTYPE CONSOLE}
uses
SysUtils,
Printer in 'Printer.pas';
var
PrinterObj: TPrinter;
begin
PrinterObj:= TPrinter.Create;
try
PrinterObj.Print;
Readln;
finally
PrinterObj.Free;
end;
end.
</lang>
=={{header|E}}==
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