Invoking begin and end via using-directive?

Question

The established idiom for invoking swap is:

using std::swap
swap(foo, bar);

This way, swap can be overloaded for user

Answer 1

If your some_container is standard container, std:: prefix is needless

#include 
#include 
#include 
int main(){ 
       std::vectorv { 1, 7, 1, 3, 6, 7 };
       std::sort( begin(v), end(v) ); // here ADL search finds std::begin, std::end
}