...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::proto::result_of::as_expr — A metafunction that computes the return type of the
proto::as_expr()
function.
// In header: <boost/proto/traits.hpp> template<typename T, typename Domain = proto::default_domain> struct as_expr { // types typedef typename Domain::template as_expr< T >::result_type type; };
The proto::result_of::as_expr<>
metafunction turns types
into Proto expression types, if they are not already, in a domain-specific way. It is intended
for use to compute the type of a local variable that can hold the result of the
proto::as_expr()
function.
See proto::domain::as_expr<>
for a complete description of the default behavior.