Problem with use of anonymous types

[Gabriel Dos Reis]

"Julian Cummings" <cummings@cacr.caltech.edu> writes:

| Hmmm... I just read through the bug reports you cited.  Sounds to me like
| this is still somewhat of an open issue, as to whether the compiler should
| issue an error in these cases or simply silently discard any templated
| function as a possible match for an operation involving an unnamed type.  As

You're right, the issue is still open.  I think people should be
careful in closing PRs related to that issue.  
I can see the reasoning behind the error but it does not make any
sense to me.  

| was pointed out in the discussion, this is a *disastrous* change in the
| standard behavior of gcc because it essentially makes it impossible to
| safely use an unnamed enum type in an arithmetic operation.  There is bound
| to be some template function overload declared in some header file somewhere
| that suddenly makes your code not work.  I am shocked that there is no
| compiler flag made available to restore the previous behavior, especially in
| light of the fact that the disposition of this issue remains unresolved.  I

Please consider filling a PR and expliclty mention the fact that the
issue is under discussion withing the C++ committee.

| have checked several other C++ compilers now (Intel icc 8.1 and IBM xlC 7.0,
| for instance) and they all accept my example.

-- Gaby