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

Struct template use_basic_expr

boost::proto::use_basic_expr

// In header: <boost/proto/generate.hpp>

template<typename Generator> 
struct use_basic_expr :  Generator {
};

Annotate a generator to indicate that it would prefer to be passed instances of proto::basic_expr<> rather than proto::expr<>.

use_basic_expr< Generator > is itself a generator.