[RFC] how to test for swap specializations?

[Benjamin Kosnik]

Anybody have any ideas on how to test for this? (It's what is left of
libstdc++/13658)

#include <vector>

int main()
{
  // Should use vector specialization for swap, and does not.
  {
    std::vector<int> A;
    std::vector<int> B;
    std::swap(A, B); 
  }

  // Should use vector specialization for swap, and does.
  {
    using namespace std;
    vector<int> A;
    vector<int> B;
    swap(A, B); 
  }

  return 0;
}

-benjamin