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From: vsnyder@math.jpl.nasa.gov (Van Snyder)
Subject: Can't find the answer
Date: 1997/11/22
Message-ID: <655s7e$ei9@netline.jpl.nasa.gov>#1/1
X-Deja-AN: 291540727
Organization: Jet Propulsion Laboratory
Newsgroups: comp.lang.ada
Date: 1997-11-22T00:00:00+00:00
List-Id: <comp.lang.ada>


I looked in the Ada-95 standard, and in Barnes's book, and in
Cohen's book, for the answer to the following question.  I
remember reading the answer long ago, but I forgot which way
it went.  And where I read it.

Suppose I have a type T1, and extend it to a type T2.

Suppose I have a procedure P that takes an argument of type T1,
not T1'class.

Can I invoke P directly on an object of type T2?  Not a classwide
object of T1'class, and not an object of type T2 converted explicitly
to T1 by T1().

E-mail would help me most, but post, too, if you like.

Van Snyder
vsnyder@gyre.jpl.nasa.gov
-- 
What fraction of Americans believe   |  Van Snyder
Wrestling is real and NASA is fake?  |  vsnyder@math.jpl.nasa.gov