`value-preserving' promotions (was IsUnsigned() function)

[Stephen Clamage]

This topic is discussed at some length, including the ruminations of
the ANSI C committee, in P. J. Plauger's column "Standard C" in the
August 1988 (vol 6, no 6) and March 1990 (vol 8, no 3) issues of
"The C Users Journal".

Two incompatible schemes were in wide use on promoting unsigned types,
and after a long battle a consensus was achieved, the losers retiring
bloody but unbowed.
-- 

Steve Clamage, TauMetric Corp, steve at taumet.com