On Sat, Nov 1, 2014 at 1:54 AM, leledumbo <leledumbo_c...@yahoo.co.id>
wrote:
> > Hm... so I'll choose the mode delphi in my new projects to type less code
> hehe...
>
> You actually ended up typing much less using objfpc style generics. Think
> of
> how many angle brackets you would need to type in Delphi mode? And how many
> if the specialized type changes? ;)
> Delphi generics can actually do the same (create a new type first), but
> objfpc enforces this.
Yes, but I had some problems to understand the generic sintax in objfpc (it
is not documented). =(
For example, how to compile this code using objfpc?:
unit Core.Singleton;
{$mode delphi}
interface
type
{ TSingleton }
TSingleton<T: class, constructor> = class(TObject)
public
class function GetInstance: T;
end;
implementation
{ TSingleton }
class function TSingleton<T>.GetInstance: T;
begin
{ TODO: implement! }
end;
end.
If I try to use mode objfpc:
unit Core.Singleton;
{$mode objfpc}{$H+}
interface
type
{ TSingleton }
generic TSingleton<T: class, constructor> = class(TObject)
public
class function GetInstance: T;
end;
implementation
{ TSingleton }
class function TSingleton<T>.GetInstance: T;
begin
{ TODO: implement! }
end;
end.
The error is:
Compile Project, Target: project1.exe: Exit code 1, Errors: 1
Core.Singleton.pas(11,32) Error: Illegal expression.
=(
--
Silvio Clécio
My public projects - github.com/silvioprog
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