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
boost::parser::make_subrange
// In header: <boost/parser/subrange.hpp> template<std::forward_iterator I, std::sentinel_for< I > S = I> constexpr subrange< I, S > make_subrange(I first, S last);