Re: [C++ PATCH] PR c++/90590 Suppress warning for enumeration value not handled in switch warning

[Jason Merrill]

On 7/9/19 11:18 AM, Matthew Beliveau wrote:
This patch suppresses the warning:  "enumeration value not handled in
switch", for enumerators that are defined in system headers and use
reserved names.

+      if (decl == NULL_TREE)
+       decl = lookup_name (TREE_PURPOSE (chain));

This seems likely to find an unrelated declaration.  If we have a name 
without a decl, I think it would be better to just look at that name 
rather than try to find the corresponding decl.  For location, we can 
use the location of the type.

Jason