On Wed, 27 Feb 2013, xrfang wrote:
Hi,
Is it possible to do the following:
=== example ===
program test;
type
TMyClass = class
type
TDataFilter = function
public
Value : Double;
Filter: TDataFilter;
procedure ViewData;
end;
procedure TMyClass.ViewData;
begin
if Filter = nil then
WriteLn(Value)
else
WriteLn(Filter(Value));
end;
var
t : TMyClass;
begin
t := TMyClass.Create;
t.Value = 2;
t.Filter := @sqr; //this does not work
t.Filter := @ln; //this does not work either
&nbs p; t.ViewData;
t.Free;
end.
=========
The problem is, while assign function pointers to Filter, I would like to make
it accept all numeric functions. That is, if I
define it to accept Double, it should accept Single and Integers, and if I
define it to accept Extended, it should accept all
numbers.
Possible?
No.
Michael.
--
_______________________________________________
Lazarus mailing list
Lazarus@lists.lazarus.freepascal.org
http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
