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Date: Mon, 29 Jan 2018 14:26:42 -0800 (PST)
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Subject: Re: Iterable container as generic parameter
From: Lionel Draghi <lionel.draghi@gmail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:50201
Date: 2018-01-29T14:26:42-08:00
List-Id: <comp.lang.ada>

Le lundi 29 janvier 2018 14:34:07 UTC+1, briot.e...@gmail.com a =C3=A9crit=
=C2=A0:
> >       function Id_Set_Image is new List_Image.Image
> >            (Cursor      =3D> Cursor,
> >             Image       =3D> Element,
> >             Iterator_If =3D> Set_Iterator_Interfaces,
> >             Container   =3D> Set,
> >             Iterator    =3D> Iterate,
> >             Style       =3D> List_Image.Bracketed_List_Style);
> > Any idea to simplify is welcome.
>=20
> Seems to me that you need not pass Cursor explicitly here, since you are =
already
> gettng it from Set_Iterator_Interfaces.

Good point indeed.

This compile fine :

with Ada.Iterator_Interfaces;

package List_Image is

   generic
      with package Iterator_If is new Ada.Iterator_Interfaces (<>);
      use Iterator_If;
    =20
      with function Image (C : Cursor) return String is <>;
 =20
   function Image return String;

end List_Image;

But this :

package body List_Image is

   function Image return String is
      C1 : Cursor;
   begin
      return "";
   end Image;

end List_Image;

cause a :
        4:12 invalid use of type before its full declaration
        4:7 premature usage of incomplete type "Ada.Iterator_Interfaces.Cur=
sor" from instance at list_image.ads:6

Am I missing something?