Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Header <boost/icl/left_open_interval.hpp>

namespace boost {
  namespace icl {
    template<typename DomainT, 
             ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)> 
      class left_open_interval;

    template<typename DomainT, ICL_COMPARE Compare> 
      struct interval_traits<icl::left_open_interval< DomainT, Compare >>;
    template<typename DomainT, ICL_COMPARE Compare> 
      struct interval_bound_type<left_open_interval< DomainT, Compare >>;
    template<typename DomainT, ICL_COMPARE Compare> 
      struct type_to_string<icl::left_open_interval< DomainT, Compare >>;
    template<typename DomainT, ICL_COMPARE Compare> 
      struct value_size<icl::left_open_interval< DomainT, Compare >>;
  }
}