Bug#829604: g++-6: In c++11/14 mode whitespaces are ignored between enum type and ::

[Gert Wollny <gw.fossdev@gmail.com>]

I might add that clan++ shows the same behavior, I've just filed a bug
with llvm upstream [1]. 

Some more details: 

If the enum is replaced by a struct then compilation fails in both, in
c++03 and in c++11 mode. 

I suspect now that it is assumed to be permissible by the standard that
white spaces occur before (ans also after?) the "::" in the
specification of fully qualified names and that this might actually be
a bug in the C++ standard itself since it ignores the here presented
case when a function in the global name space with a non-trivial return
type must be specified withing another scope (like here in the friend
declaration).

But I don't know the standard well enough to be sure.

Best, 
Gert 


[1] https://llvm.org/bugs/show_bug.cgi?id=28422