Possible C++ bug: Are C enum tags unsigned?

[Chip Salzenberg]

According to Eli Zaretskii:
> > 449:    else if (index < -TOTAL_KEYWORDS)
> 
> The problem is in your code [...]

Hey, it's not _my_ code.  :-)  But I get your point.

> The only operations which can meaningfully be used with an enum are
> assignment, equality, and inequality.  And you cannot mix enum with
> other data types [...]

But I vaguely recall a rule in ANSI C that enum values decay to int
when you use them.  Is my memory being over-specific about the type?
-- 
Chip Salzenberg              - a.k.a. -              <chip@valinux.com>
"I wanted to play hopscotch with the impenetrable mystery of existence,
    but he stepped in a wormhole and had to go in early."  // MST3K