Re: Where is the elusive jump command?

[Ole-Hjalmar Kristensen <ohk@clustra.com>]

Robert Dewar <dewar@gnat.com> writes:

> In article <38E312F8.78883ACB@icn.siemens.de>,
>   Alfred Hilscher <Alfred.Hilscher@icn.siemens.de> wrote:
> 
> > unfortunately, ALIASED is neccessary in most bindings to
> > C-written APIs.
> 
> Much less than may programmers think. For example it is usually
> much more appropriate if the C parameter is *int to define
> it as in out INT on the Ada side, so that the call looks like
> 
>   p (x);           -- x need not be aliased
>   p (x'access);    -- x must be aliased
> 
> I perfectly well agree that this does not cover all cases, but
> in my experience of looking at a LOT of code, I often see the
> wrong approach here.
> 
> But in any case, binding to C is hardly a topic that is
> appropriate to people first learning the language!
> 

Certainly, but writing bindings to C is one of the first things you
have to do if you start using Ada for systems programming on Unix,
unfortunately.

> 
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-- 
E pluribus Unix