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From: =?ISO-8859-1?Q?S=E9bastien?= <seb.morand@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: String declaration and initialization
Date: Thu, 22 May 2008 16:58:51 +0000
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Date: 2008-05-22T16:58:51+00:00
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> The simplest way is to use a bounded or unbounded string:
> 
> declare
>   S : Unbounded_String;
> begin
>   case Some_Test is
>      when T1 => S := To_Unbounded_String ("test1");
>   ...
> end;

Yep I think about it but in this case, I made several conversions 
because I have stuff like that:

	buffer := To_Unbouned_String(Trim(Integer'Image(my_int), Left));

And then treatment use String so:
MyTreatment(To_String(buffer));

So I don't actually know how fast is the conversion between String and 
Unbounded_String but I think it's a waste of ressource.

> Another way is to use a table like you can in C:
> 
> declare
>   Test1 : aliased constant String := "test1";
>   Test2 : aliased constant String := "test2";
> 
>   type Table_Type is array (Test_Type) of
>     not null access constant String;
> 
>   Table : constant Table_Type :=
>     (T1 => Test1'Access,
>      T2 => Test2'Access,
>      ...);
> 
>   S : String renames Table (Some_Test).all;
> begin
> ...
> end;

That's an idea but... Test1 are actually not a constant string, that was 
an example :-) It's calculated sometime it's even a return of some 
function and so on.

But you give me an Idea :
declare
     buffer: access String;
     Free_String is new Unchecked_Deallocation(String, access all String);
begin
     case SomeTest is
         case TEST1 =>
             buffer := new String("Test1");
         case TEST2 =>
             buffer := new String("Test2");
     end case;
     MyTreatment1(buffer.all, buffer.all'Size);
     MyTreatment2(buffer.all, buffer.all'Size);
     MyTreatment3(buffer.all, buffer.all'Size);
end;

but it doesn't work of course since I can't create with new an 
unconstrained object.