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From: Marius Amado Alves <amado.alves@netcabo.pt>
Newsgroups: comp.lang.ada
Subject: Re: oo problem help please
Date: Mon, 08 Dec 2003 23:19:37 +0000
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Date: 2003-12-08T23:19:37+00:00

On Mon, 2003-12-08 at 19:49, shoko wrote:
> what is wrong with the following code:
> ...
>      type car is tagged 
>      record
>          name:String(1..256);
>      end record;
> ...
>   procedure set_name(name:String;This:in out car)is
>   begin 
>      this.name:=name;

My guess is this last line.

> ... the problem is that i get constraint error when the code is executed
> why???

Ditto.

Possible fixes:

- pad (or trim) to 256 before assigning;

- make sure the target is initialized to spaces (say), and that the
source is no longer than the target, and then write This.Name (1 ..
Target'Length) := Name;

- redefine the component to be a pointer to string, then write This.Name
:= new String' (Name);