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From: tmoran@bix.com (Tom Moran)
Subject: Re: PRECOMPILATION
Date: 1999/02/10
Message-ID: <36c20b5b.18435714@news.pacbell.net>#1/1
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References: <918556681.260459@dedale.pandemonium.fr>
 <36c0b3ad.367441@news.pacbell.net> <36C1E9E8.EE698090@magic.fr>
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X-Trace: typhoon-sf.pbi.net 918686884 206.170.2.129 (Wed,
 10 Feb 1999 14:48:04 PDT)
Organization: SBC Internet Services
NNTP-Posting-Date: Wed, 10 Feb 1999 14:48:04 PDT
Newsgroups: comp.lang.ada
Date: 1999-02-10T00:00:00+00:00
List-Id: <comp.lang.ada>

>Is it legal Ada to write
>Sometimes : constant Boolean := False;
>if Sometimes then
>  -- representation clause
>else
>  -- another representation caluse of the same type
  No, since "if Sometimes then" can't appear in a declaration part.
You might be able to
if Sometimes then
  declare
     ..... do all the 32 bit declarations and usage thereof
  end;
else
  declare
     ... do the 64 bit version
   end;
end if;
if that doesn't generate other problems.  Tucker Taft's solution of
putting the variable stuff into different variants of a low level
package is what I've done in the past, though.