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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: Re: using `use' : what is the best practice ?
Date: Sun, 12 Jun 2011 07:09:35 +0200
Organization: Ada @ Home
Message-ID: <op.vwx5x9r9ule2fv@douda-yannick>
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 <4DEE60E9.2020408@obry.net>
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Date: 2011-06-12T07:09:35+02:00
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Le Tue, 07 Jun 2011 19:33:29 +0200, Pascal Obry <pascal@obry.net> a =C3=A9=
crit:
> in this case... Look at this code:
>
>     with Ada.Strings.Unbounded;
>     procedure Whatever is
>        S : Ada.Strings.Unbounded.Unbounded_String;
>     begin
>        Ada.Strings.Unbounded.Append (S, "toto");
>     end Whatever;
>
> Far better with:
>
>     with Ada.Strings.Unbounded;
>     procedure Whatever is
>        use Ada.Strings.Unbounded;
>        S : Unbounded_String;
>     begin
>        Append (S, "toto");
>     end Whatever;

You could also use package renaming, to access the leaf of a whole branc=
h  =

via a single short name. By the way, subprogram renaming is an option to=
o  =

in some cases (when a subprogram's invocation is very often encountered =
in  =

some package body).

> Because Ada.Strings.Unbounded (and all Ada runtime packages) has been =
 =

> designed to be used with a use clause.
>
> Now I do prefer:
>
>     package Circle is
>        type Object is...
>
> And use it as:
>
>     with Circle;
>
>     O : Circle.Object;

Good convention indeed. To talk about concrete matters, the name Instanc=
e  =

may also be an option to have in mind along with the name Object (Instan=
ce  =

may be more neutral, depending on one's feeling)

-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D  [Ep=
igrams on  =

Programming =E2=80=94 Alan J. =E2=80=94 P. Yale University]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [Idem]
=E2=80=9Cc++; /* this makes c bigger but returns the old value */=E2=80=9D=
 [Anonymous]