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Team Ada: Ada Programming Language Advocacy


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Sender: "Team Ada: Ada Advocacy Issues (83 & 95)" <[log in to unmask]>
Date: Fri, 14 Feb 2003 02:11:21 +0300
Reply-To: "Alexandre E. Kopilovitch" <[log in to unmask]>
From: "Alexandre E. Kopilovitch" <[log in to unmask]>
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In-Reply-To: <[log in to unmask]>; from Jens Jakob Jensen at Thu, 13 Feb 2003 18:31:55 +0100
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>I consider Ada packages as static (non-instantiable) classes, where children
>inherits their static nature.
>  Does that make sense ?
Too narrow sense. Although you do not instantiate non-generic packages (if you
do not treat "with" clause as a kind of instantiation), you may instantiate
new types from them, deriving from private types declared in those packages.
  Look at the difference between "new" in C++ and "new" in Ada. "new" in C++
is run-time action, which produces new copy of object of the class, while
"new" in Ada is compile-time action, which produces new type, and that new
type is neither subtype nor supertype of original type... but it is defined
by the same package as the original type.