Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!mips!excelan!sjsumcs!horstman
From: horstman@sjsumcs.sjsu.edu (Cay Horstmann)
Newsgroups: comp.lang.c++
Subject: Re: Conversion between enum and int
Message-ID: <1989Dec23.072942.24069@sjsumcs.sjsu.edu>
Date: 23 Dec 89 07:29:42 GMT
References: <34022@<1989Dec18> <21000006@inmet>
Reply-To: horstman@sjsumcs.SJSU.EDU (Cay Horstmann)
Organization: San Jose State University
Lines: 20

In article <21000006@inmet> stt@inmet.inmet.com writes:
>
>Presumably, you can get x = !x to work if you implement
>your own operator! for Bool (and &&, || -- are those possible?).

(This was in response to my query whether indeed a type conversion
from int to enum Bool { FALSE, TRUE }; required a cast.)

NO! You cannot attach overloaded operators to an enum, only to a class.
I must say that I have been somewhat unwilling to go as far as to
define
	class Bool { int truthValue; Bool operator!(); /* ... */ };
There are limits to everything. 

In fact, I am going back to good old
	#define FALSE 0
	#define TRUE 1
	#define Bool int

Cay