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From: "Gavino" <invalid@invalid.invalid>
Newsgroups: comp.lang.ada
Subject: Re: Q: SPARK visibility rules and inherit annotations.
Date: Fri, 21 May 2010 12:42:53 +0200
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"Yannick Duch�ne (Hibou57)" <yannick_duchene@yahoo.fr> wrote in message
news:op.vc0hbmfnxmjfy8@garhos...
>Le Thu, 20 May 2010 13:03:01 +0200, Gavino <invalid@invalid.invalid> a
�crit:
>> It's to avoid overloading, especially the implicit declaration of
>> user-defined subprograms.
>While this only occurs with tagged types, and SPARK 95 has support for
>tagged type. Or may be I'm wrong somewhere, or else, I did not understood
>what you were to say.

Firstly, derived types can introduce overloaded enumeration literals, which
SPARK prohibits.
Secondly, if the parent type is one declared immediately within the visible
part of a package, then certain subprograms declared there are implicitly
declared for the derived type, again a form of overloading.