From: "Alejandro R. Mosteo" <alejandro@mosteo.com>
Subject: Re: Mixing operators and dot notation
Date: Thu, 2 Jun 2016 23:42:35 +0200
Date: 2016-06-02T23:42:35+02:00 [thread overview]
Message-ID: <niq97n$u7l$2@dont-email.me> (raw)
In-Reply-To: <niq90k$u7l$1@dont-email.me>
Failed to say: tested with gnat gpl 2015 and 2016.
On 02/06/16 23:38, Alejandro R. Mosteo wrote:
> Hello all,
>
> I'm trying to abuse Ada syntax for nefarious purposes and have arrived
> at something that looks inconsistent to me, but I fail to see if it is
> expected behavior or a bug. This is a self-contained example which is
> below.
>
> The gist is to have an operator that returns a class-wide type in order
> to use dot notation on it. The problem is in the last statement. Should
> it work just like the function version?:
>
> procedure Cla is
>
> generic
> package Nested is
> type Object is tagged null record;
> procedure Method (O : Object) is null;
> end Nested;
>
> package Nest is new Nested;
>
> function Op (X, Y : Integer) return Nest.Object'Class is
> pragma Unreferenced (X, Y);
> begin
> return Nest.Object'(null record);
> end Op;
>
> function "&" (X, Y : Integer) return Nest.Object'Class renames Op;
>
> N : Nest.Object'Class := Op (1, 2);
> M : Nest.Object'Class := 1 & 2; -- Both work
>
> begin
> N.Method;
> M.Method; -- Of course both work
>
> Op (1, 2).Method; -- Fine
>
> -- (1 & 2).Method; -- Error: statement expected
> end Cla;
next prev parent reply other threads:[~2016-06-02 21:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-02 21:38 Mixing operators and dot notation Alejandro R. Mosteo
2016-06-02 21:42 ` Alejandro R. Mosteo [this message]
2016-06-02 22:28 ` Robert A Duff
2016-06-02 23:26 ` Randy Brukardt
2016-06-03 11:09 ` Alejandro R. Mosteo
2016-06-03 12:19 ` Dmitry A. Kazakov
2016-06-03 14:45 ` G.B.
2016-06-03 17:31 ` Shark8
2016-06-03 20:41 ` Alejandro R. Mosteo
2016-06-06 8:14 ` briot.emmanuel
2016-06-06 13:51 ` Alejandro R. Mosteo
2016-06-07 11:24 ` Traits and iterators (was: Mixing operators and dot notation) Alejandro R. Mosteo
2016-06-08 7:31 ` briot.emmanuel
2016-06-08 11:18 ` Traits and iterators Alejandro R. Mosteo
2016-06-06 8:10 ` Mixing operators and dot notation briot.emmanuel
2016-06-06 13:58 ` Alejandro R. Mosteo
2016-06-02 23:05 ` Jeffrey R. Carter
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