Re: [Boost-users] ADL comment in noncopyable

Peter Dimov writes:

One common problem of this kind is

template< class T, class A = std::allocator<T> > class X;

X<int> x;

foo( x ); // searches std

Given that this can be characterized as a problem, what's a "positive" example to illustrate the motivation for this rule? There must be something useful it's meant to enable. Or, rather, I hope there is. -- Steven E. Harris