Does inheriting constructors work with templates in C++0x?

Question

In C++0x, you can use the using keyword to inherit constructors, like so:

class B { B(int) {} };

class A : public B { using B::B; };
         


        

Answer 1

Yes, it appears it does, from the standard (Feb 2011 Draft), section 12.9:

template< class T >
struct D : T {
using T::T; // declares all constructors from class T
~D() { std::clog << "Destroying wrapper" << std::endl; }
};

Class template D wraps any class and forwards all of its constructors, while writing a message to the standard log whenever an object of class D is destroyed. —end example

Another thing to note, while the standard allows it, according to this list, only 1 compiler, IBM XLC++, supports this feature in a release version. GCC only currently supports it with a patch.

Edit: AJG85 pointed out that the T in the template always refers to the placeholder, so the 'using T::T' always refers to the template argument.