Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!decvax!ima!haddock!karl
From: karl@haddock.ima.isc.com (Karl Heuer)
Newsgroups: comp.std.c
Subject: Re: Initialized bitfileds - help me read
Message-ID: <12112@haddock.ima.isc.com>
Date: 21 Mar 89 17:37:15 GMT
References: <13363@steinmetz.ge.com> <1989Mar15.165019.21562@utzoo.uucp> <12417@watdragon.waterloo.edu> <1989Mar17.175208.1064@utzoo.uucp>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Organization: Interactive Systems, Boston
Lines: 14

In article <1989Mar17.175208.1064@utzoo.uucp> henry@utzoo.uucp (Henry Spencer) writes:
>Initialization of bitfields is not special in any way in ANSI C -- they are
>ordinary structure members for this purpose.

Except that "All unnamed structure or union members are ignored during
initialization" (3.5.7), and I believe that only bitfields can be unnamed.

So, what is the correct way to initialize an object of type
	struct alpha { int a; struct beta { int :3; } b; int c; }
, where one of the members is a struct with no initializable members?  Does
the initializer {1,2} initialize a and c?  Or is {1,{},2} the proper (fully-
bracketed) syntax?

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