[fpc-pascal] cloning data containers

[Chriss Kalogeropoulos]

Hi,

FPC does not support copy-construction so either you must override the
TPersistent.Assign method or in case of TComponent you can use
ReadComponent/WriteComponent.

You should also take into account deep vs swallow copy semantics as well as
the type of the container and contained classes
(TPersistent/TCmponent/TCollection descendant).

For records I am not sure, probably you should need a method on the
container or check on some internal (compiler magic) functions such as
CopyRecord and others.

Hope that helps.

Chriss
On Dec 27, 2014 6:22 PM, "Marc Santhoff" <M.Santhoff at web.de> wrote:

> On Sa, 2014-12-27 at 16:45 +0100, Bart wrote:
> > On 12/27/14, Marc Santhoff <M.Santhoff at web.de> wrote:
> >
> > > function clone(data_in: a_record): a_record;
> > > var
> > >   data: Pa_record;
> > > begin
> > >   new(data);
> >      data^ := data_in;  //should work*
> > > end;
> >
> > * Might not be a good idea if data contains a class(reference).
>
> Oops, I just typed that away and did not hit CTRL-F9 - which is useless
> in the mailer anyway. ;)
>
> --
> Marc Santhoff <M.Santhoff at web.de>
>
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>
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