...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
A case-insensitive less predicate for strings.
Defined in header <boost/url/grammar/ci_string.hpp>
using ci_less = see-below;
The comparison algorithm implements a case-insensitive total order on the set of all ASCII strings; however, it is not a lexicographical comparison. This is a suitable predicate for ordered containers. The function is defined only for strings containing low-ASCII characters.
boost::container::map< std::string, std::string, ci_less > m1; std::map< std::string, std::string, ci_less > m2; // (since C++14)
Convenience header <boost/url/grammar.hpp>