...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Type used to represent the distance between two iterators in the range.
typedef std::ptrdiff_t difference_type;
Header: boost/asio/ip/basic_resolver_results.hpp
Convenience header: boost/asio.hpp