Re: How can I avoid Using a Semaphore?

[mark_lundquist@my-deja.com]

> In my opinion this is one of the weak points of Ada 95.  It would
have been
> better to not have the 'input and 'output pre-defined for built in
types (as
> a part of the language) but to include a package for defining these
> attributes.  That way an arbitrary representation of built in types
could be
> used with streams when desired.

Why don't you just derive from the predefined type, then override the
stream attributes on your derived type?  That doesn't seem like a huge
inconvenience... OTOH, it seems like Ada is helping, not hurting, by
supplying predefined implementations of those attributes for predefined
types (for when you *don't* care how they are implemented!)

Maybe I'm missing your point when you say this is a weak point...?  If
so, try again and I'll try to follow :-)

Said another way, if you say you want different stream I/O methods for
Integer than the predefined ones, what you really mean is that you
don't want an Integer! :-)  What you want is something that is just
like an Integer but has different I/O methods.

Mark Lundquist
Rational Software



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