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From: "Matthew Heaney" <matthew_heaney@acm.org>
Subject: Re: question about functions
Date: 2000/01/25
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In article <uwvozl2hp.fsf@gsfc.nasa.gov> , Stephen Leake 
<Stephen.Leake@gsfc.nasa.gov>  wrote:

> In any case, I have often successfully used 'Address on subprogram
> parameters that are not of a by-reference type, with both ObjectAda
> and GNAT, so at least some compilers go beyond the implementation advice.

Of course it *may* work, but you are depending on an implementation
specific feature, namely the parameter passing mechanism used for
composite types.

Even within one compiler, an array may be passed by value if it's
"small" enough.