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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
 =?utf-8?Q?=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Ada 2012 : aliased parameters ?
Date: Mon, 28 Mar 2011 13:47:22 +0200
Organization: Ada @ Home
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Date: 2011-03-28T13:47:22+02:00
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Hello,

I was looking at what the Ada 2012 reference looks like so far, and  =

especially at all the =E2=80=9CExtensions to Ada 2005=E2=80=9D sections.=
 In =E2=80=9CSubprogram  =

Declarations=E2=80=9D there is such an extension.

     Quote from Ada 2012:

     Parameters can now be explicitly aliased, allowing parts of
     function results to designate parameters and forcing
     by-reference parameter passing.

I'm not sure I've understood. What was wrong with access type parameters=
 ?  =

I don't see a reason why aliased parameters may be required (and don't  =

feel this can be clean). Well, why not in/out parameter for functions, a=
s  =

things like test-and-set are common idioms, but I really can't figure wh=
y  =

this one in particular was required.

I may look at the related AI later, but it's long (so I will deffer it).=
 A  =

quick overview of good reasons from someone who know ?


-- =

Si les chats miaulent et font autant de vocalises bizarres, c=E2=80=99es=
t pas pour  =

les chiens.
=E2=80=9C c++; /* this makes c bigger but returns the old value */ =E2=80=
=9D [Anonymous]