Template declaration inside function

[Florian Weimer]

* Mattias Karlsson:

> Given:
>
> void f(void)
> {
>    template<typename T> class A
>    {
>    };
> }
>
> g++ 4.0/3.4 gives: 
> bug.cpp:4: error: expected primary-expression before 'template'
>
> Can a language lawer please confirm that this is even valid before I
> create a PR?

It's not valid (local template declarations are not allowed, see
14(2)), but it makes sense to create a PR.  The error message is very
hard to understand.