c/5581: Feaure request for GNU extension to find number of elems in an enum

[mark2776@yahoo.com]

>Number:         5581
>Category:       c
>Synopsis:       Feaure request for GNU extension to find number of elems in an enum
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          support
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 04 11:06:02 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     mark2776@yahoo.com
>Release:        gcc-2.95.3
>Organization:
>Environment:

>Description:
I'd like to be able to get compile time information about the
size of an enum. For instance:
enum _enum_type {
	ONE,
	TWO
};
int t=numberof(_enum_type);
will make t=2

I fully understand that I have to use this information correctly
since there may be gaps in the enumeration but the fact that I
could shoot myself in the leg with this is not a reason not to
give this to me (with correct programming I could do good stuff
with this too...).
The same goes for unions.

Other possible attributes could be:
- lastof(enum_type) = the value of the last element.
- firstof(enum_type) = the value of the first element.
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: