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From: Florian Weimer <fw@deneb.cygnus.argh.org>
Subject: Wide_Character vs. Interfaces.C.wchar_t
Date: 1999/10/13
Message-ID: <87emez6nn6.fsf@deneb.cygnus.argh.org>#1/1
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Date: 1999-10-13T19:55:57+00:00
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ARM B.3 seems to imply the existance of a bijective mapping between
Wide_Character and Interfaces.C.wchar_t.  ARM 3.5.2(3) requires that
Wide_Character has exactly 2**16 distinct values.  What shall be done
if wchar_t (the C version) has more than just 16 significant bits?

This isn't just a theoretical question because with GNU libc 2.1.2,
wchar_t type has actually 32 significant bits (and GNAT declares
Interfaces.C.wchar_t so that its size is 16 bits, which seems to
be wrong).