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::lexeme
// In header: <boost/parser/parser.hpp> directive< lexeme_parser > lexeme;
The lexeme directive, whose operator[] returns a parser_interface<lexeme_parser<P>> from a given parser of type parser_interface<P>.