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Path: utzoo!mnetor!seismo!think!ima!haddock!karl
From: karl@haddock
Newsgroups: net.lang.c
Subject: Unsigned promotions
Message-ID: <86900028@haddock>
Date: Mon, 25-Aug-86 14:41:00 EDT
Article-I.D.: haddock.86900028
Posted: Mon Aug 25 14:41:00 1986
Date-Received: Mon, 25-Aug-86 22:58:06 EDT
Lines: 12
Nf-ID: #N:haddock:86900028:000:497
Nf-From: haddock!karl    Aug 25 14:41:00 1986


When an unsigned char or unsigned short is used in an expression, is it
promoted to int or unsigned int?  (It is zero-extended either way, but the
type of the result is significant, e.g. in a divide.)

K&R seems not to mention unsigned datatypes other than int.
My local C compiler promotes it to unsigned.
X3J11 (May, 1986) says the result is int.

Do some existing compilers promote to signed int?  What does H&S say?

Karl W. Z. Heuer (karl@haddock.isc.com; ima!haddock!karl), The Walking Lint