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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Elaboration of nested packages.
Date: 1997/06/20
Message-ID: <dewar.866853665@merv>#1/1
X-Deja-AN: 251466051
References: <yrQ8RCAF8EqzEwgc@marnhull.demon.co.uk>
Organization: New York University
Newsgroups: comp.lang.ada
Date: 1997-06-20T00:00:00+00:00
List-Id: <comp.lang.ada>


Bill Keen asks about

<<with Ada.text_io; use Ada.text_io;
procedure P is
  package OP is
    generic
    package IG is
    end IG;
  end OP;
  package PI is new OP.IG; -- Is this ok?
  package body OP is
    package body IG is
    begin
      put_line("Elaborated body IG");
    end;
  begin
    put_line("Elaborated body OP");
  end;
begin
  put_line("Main program");
end P;>>


This is invalid code, since the instantiation appears before the body of
the generic. It should raise Program_Error, but this check is not in GNAT
3.07.

The current version of GNAT (3.10) will generate a static warning that this
instantiation will raise Program_Error, and then if you execute the program,
it *will* raise program_error.