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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: redefinition of the operator
Newsgroups: comp.lang.ada
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Organization: cbb software GmbH
References: <pan.2005.11.20.08.48.47.643720@virgilio.it>
Date: Sun, 20 Nov 2005 11:50:47 +0100
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Date: 2005-11-20T11:50:45+01:00
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On Sun, 20 Nov 2005 09:49:55 +0100, Francesco Bochicchio wrote:

> I need to redefine the standard mathematic operators, to replace them with
> my own version. 
> 
> So, if I do something like this, it works:
> 
> -- ******************************
> procedure Test_MyOperators is
>    A,B : Long_Float;
>    function "+"(X, Y : Long_Float) return Long_Float
>    is
>    begin
>       return X;
>    end;
> 
> begin
>    A := 1.0;
>    B := 2.0;
> 
>    if A = A+B then
>       Put_Line("Yes.");
>    else
>       Put_Line("No");
>    end if;
> end;
> -- -------------------------------------
> 
> But since I have many packages, I want to put the redefined operators 
> in a separate package, say MY_OPERATORS, and doing instead:

Define a new type and its operations in one package:

package My_Operators is
   type My_Real is new Long_Float;
   function "+" (Left, Right : My_Real) return My_Real;
end My_Operators;

> -- *************************************
> 
> with MY_OPERATORS; use MY_OPERATORS;
> 
> procedure Test_MyOperators is
>    A,B : Long_Float;

Use My_Real instead.

> begin
>    A := 1.0;
>    B := 2.0;
> 
>    if A = A+B then
>       Put_Line("Yes.");
>    else
>       Put_Line("No");
>    end if;
> end;

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de