c++/949: __typeof__ extension broken

[gregod@rpi.edu]

>Number:         949
>Category:       c++
>Synopsis:       __typeof__ extension broken
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 30 21:36:00 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     Doug Gregor
>Release:        gcc version 2.97 20001130 (experimental)
>Organization:
>Environment:
i686-pc-linux-gnu
>Description:
The write_type function doesn't not handle the TYPEOF_TYPE case, so g++ aborts. The error message given is:

gettype.C:10: Internal error #20000409.
gettype.C:10: Internal compiler error in write_type, at cp/mangle.c:1353
Please submit a full bug report.
See <URL: http://www.gnu.org/software/gcc/bugs.html > for instructions.

>How-To-Repeat:
g++ gettype.ii
>Fix:
A case for TYPEOF_TYPE needs to be added, though this may require adding nonstandard mangling code for __typeof__. 

As a test, I added a case for TYPEOF_TYPE which does nothing but break. I've found no ill-effects, and the typeof extension has worked wonderfully in code that makes heavy use of template metaprogramming. 

Any information regarding why the above fix will not work is welcome, and I'll be happy to help with a solution if possible.
>Release-Note:
>Audit-Trail:
>Unformatted:
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