FPC TList Specialization not supported

Question

I am using Lazarus 1.0.4 with FPC 2.6

I am trying to create a TList of an own class (I just use string here, because it is more easy), but when I try to use

type
TStringList = specialize TList<string>;

it says "Specialization is only supported for generic types.

What am I doing wrong?

Clearly TList is not generic. You are using the class from Classes I guess. In the Delphi RTL you'd use the generic TList from Generics.Collections. Not sure where you find the equivalent in FPC. — David Heffernan, Nov 25 '13 at 15:49
@TLama the string in the Q is just an example. In the real code it is TList — David Heffernan, Nov 25 '13 at 15:55
@DavidHeffernan yes, I am. I already tried using Generigc.Collections, but Lazarus said it is an unknown unit. — Pinguin895, Nov 25 '13 at 15:55
@DavidHeffernan you are right. At the moment TList is defined by Classes. — Pinguin895, Nov 25 '13 at 16:04
@TLama as far as I know I would not have to define an own class for my List if i could use Generics.Collections, would I? And in your Post he talks about defining an own generic class. — Pinguin895, Nov 25 '13 at 16:07
according to the wiki it's the fgl unit, see http://wiki.freepascal.org/Generics#fgl_unit — R-D, Nov 25 '13 at 16:17
@RoaldvanDoorn yes that seems to work! Thank you everyone for helping me! — Pinguin895, Nov 25 '13 at 16:48

score 1 · Accepted Answer · answered Nov 28 '13 at 13:07

1

Might as well post it as answer, since it seems to have done the trick.

You need to use the fgl unit. See the Wiki at freepascal.org.

answered Nov 28 '13 at 13:07

R-D

1 Answers1