AMDG Mathieu - wrote:

I was reading the boost.container vector sources, and I can't figure how this vector instantiations can work :

boost::container::vector<int> foo;

considering that the vector definition looks like :

template <typename T, typename A> vector;

As the second template parameter A has no default type, I believe it's actually mandatory but it's not the case as this : boost::container::vector<Type> compiles fine.

I've been reading through the whole source file but I can't find where the trick is. if anyone can enlighten me?

The default parameters are in the declaration in container_forward.hpp In Christ, Steven Watanabe