[Bug c++/26448] unnecessary namespace-alias ambiguity

[bangerth at dealii dot org]

------- Comment #3 from bangerth at dealii dot org  2006-03-08 14:59 -------
I didn't make up the rules, so you're barking up the wrong tree :-)

But the difference between using directives for names and namespace
aliases is that a using directive is final: it imports a name into
the present namespace. The namespace alias provides an alternative
name for a namespace, but the namespace name it points to may itself
be an alias, which means that the compiler may have to walk a fairly
long chain of aliases until it finally finds the original.

W.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26448