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From: "k_leau" <k_leau@yahoo.com>
Newsgroups: comp.lang.ada
References: <40be5080$0$9181$626a14ce@news.free.fr>
 <c9lkp0$iqs$1@a1-hrz.uni-duisburg.de>
Subject: Re: warning: cannot return a local value by reference
Date: Thu, 3 Jun 2004 00:49:59 +0200
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Date: 2004-06-03T00:50:05+02:00
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Thanks

"Georg Bauhaus" <sb463ba@l1-hrz.uni-duisburg.de> wrote in message
news:c9lkp0$iqs$1@a1-hrz.uni-duisburg.de...
> k_leau <k_leau@yahoo.com> wrote:
> : Hello,
> :
> : I am new to Ada programming and I have the following problem:
>
> The value of type item_dbm that your function should return is
>
> a) local to the function
> b) limited.
>
> (b) makes item_dbm a return-by-reference type under current rules.
> (The local value will be lost when the function is done, it can
> no longer be refered to).
>
> Instead you could declare a procedure,
>
>   procedure new_from_old(old: item_dbm; another: out item_dbm);
>
> and then create a new item_db object, `fresh', and initialise it with
> values from a previous item_db object,
>
>   declare
>      fresh: item_dbm;
>   begin
>      new_from_old(..., fresh);
>      ...use fresh...
>   end;
>
>
>
> -- Georg