Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!aplcen!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!mips!excelan!sjsumcs!horstman
From: horstman@sjsumcs.sjsu.edu (Cay Horstmann)
Newsgroups: comp.lang.c++
Subject: Conversion between enum and int
Summary: Do && || ! work on enum Bool { FALSE, TRUE }; ?
Message-ID: <1989Dec18.034022.19303@sjsumcs.sjsu.edu>
Date: 18 Dec 89 03:40:22 GMT
Expires: 12/30/89
Sender: Cay Horstmann
Reply-To: horstman@sjsumcs.SJSU.EDU (Cay Horstmann)
Distribution: na
Organization: San Jose State University
Lines: 24

I just got around to firing up my Zortech compiler version 2.0. It flags
as an *error* the following:

enum Bool { FALSE, TRUE };
// ...
Bool x;
// ...
x = !x;


Is this really an error? It was my impression that conversions from enum
to int and from int to enum are ok, i.e. the above should correctly work
to
	(1) Convert x to an int
	(2) ! that int
	(3) Convert the result back to enum Bool and stuff into x

I know that conversions *between* two different enums aren't ok without a cast.

I sure hope I am right and Walter isn't--I *like* enum Bool { FALSE, TRUE };
and it would be pretty useless if one couldn't do && || ! on it. Hey, if I
wanted fascism in enumerated types, I'd program in Ada :-)

Cay