Ada.Containers.Indefinite_Holders in GNAT and Ada2012

[Victor Porton <porton@narod.ru>]

I tried to write:

Element(Object)'Access;

for "Object" being a value of an instance of 
Ada.Containers.Indefinite_Holders.

This does not work because the return type of Element is not aliased.

Then I tried:

Reference(Object).all'Access;

This does not work because in GNAT 4.9 a-coinho.ads source file is not up to 
date with Ada2012 and there are no Reference function here.

My questions:

1. How long to wait for GNAT to work with this? (in which GNAT version?)

2. In a conforming Ada2012 compiler `Reference(Object).all'Access;` is 
semantically correct, isn't it?

In the meantime, I need to write for my private use a container similar to 
Ada.Containers.Indefinite_Holders for aliased objects by myself :-(

-- 
Victor Porton - http://portonvictor.org