Calling a function overloaded in several namespaces from inside one namespace

Question

I have the following code snippet:

void foo(double a) {}

namespace bar_space
{
  struct Bar {};

  void foo(Bar a) {}
}

foo(double) is a g

Answer 1

Yes, bar_space is hiding the original function and no, you can't make foo(5.0) callable from whithin bar_space without explicit scoping if foo(double) is defined in the global namespace.