[fpc-devel] objfpc generics how to generate self type reference ?

[Mattias Gaertner]

On Tue, 3 Sep 2019 12:38:49 +0200
Mattias Gaertner via fpc-devel <fpc-devel at lists.freepascal.org> wrote:

> On Tue, 3 Sep 2019 12:15:50 +0200
> Marco van de Voort <fpc at pascalprogramming.org> wrote:
> 
> > I'm trying to let an iterator implement the enumerator pattern and 
> > return itself, but for that I need to use the type of the generic:
> > 
> >       generic THashmapIterator<TKey, TValue, T, TTable>=class
> >           public
> >            type PValue=^TValue;
> > 
> >                  // make type alias
> > 
> >                    TIteratorType = generic THashmapIterator<TKey, 
> > TValue, T, TTable>;  
> 
> Inside the generic the templates are normal types:
> 
>       TIteratorType = specialize THashmapIterator<TKey, TValue, T,
> TTable>;

Btw, mode objfpc allows shortcut THashmapIterator without <> as
shortcut for "specialize THashmapIterator<TKey, TValue, T, TTable>";

Mattias