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Newsgroups: comp.lang.ada
Subject: Re: This can't be done in Ada...or?
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From: Ludovic Brenta <ludovic.brenta@insalien.org>
Date: Sat, 12 Feb 2005 00:51:57 +0100
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Date: 2005-02-12T00:35:25+01:00
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Robert A Duff writes:
> The compiler can optimize away everything inside the "if
> Logging_Enabled".  But it can't optimize away the evaluation of the
> parameters unless it can prove the absence of side effects.  For
> example:
>
>     Trace.Error(..., "Bad value of X " & Debug_Info(X));
>
> where Debug_Info is some user-defined function that produces useful
> debug info about some complicated data structure called X.  It has
> no side effects, but the compiler doesn't know that, usually.

What if Debug_Info is in a Pure package?  Does the compiler still have
to consider possible side effects?  I'm really curious.

-- 
Ludovic Brenta.