Re: on the need to duplicate code for procedure signature in both body and interface files

[Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>]

On 07/07/2012 04:08 PM, Nasser M. Abbasi wrote:
> Basic question from an Ada newbie.
>
> One thing that always bothered me in Ada is the need
> to physically duplicate the code that represents the API
> of the package procedures and functions in both the interface
> and the body files (.ads and .adb).
>
> I do not like duplicating code at all. Even if it is only
> for the signature of the API, and even though the Ada
> compiler will catch any difference (assuming one changes
> the .ads and forget to update the .adb for example).

Consider the following:

package P is
    function F (I : Integer) return Integer;

    type Integer_List is array (Integer range <>) of Integer;

    function F return Integer_List;
end P;

How are you going to write the body of P so the compiler knows which body 
implements which function F without repeating the parameter list and return type 
profile, which is what distinguishes these 2 overloaded functions?

-- 
Jeff Carter
"This school was here before you came,
and it'll be here before you go."
Horse Feathers
48



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