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
This is an older version of Boost and was released in 2021. The current version is 1.89.0.
boost::proto::transform::result<This(Expr)>
// In header: <boost/proto/transform/impl.hpp> template<typename This, typename Expr> struct result<This(Expr)> { // types typedef typename PrimitiveTransform::template impl< Expr,unspecified,unspecified>::result_type type; };