Struct template make_expr<Tag, Domain, A...>

Boost C++ Libraries

Struct template make_expr<Tag, Domain, A...>

boost::proto::result_of::make_expr<Tag, Domain, A...> — Metafunction that computes the return type of the proto::make_expr() function, within the specified domain.

Synopsis

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

template<typename Tag, typename Domain, typename... A> 
struct make_expr<Tag, Domain, A...> {
  // types
  typedef see-below type;
};

Description

Computes the return type of the proto::make_expr() function.

`make_expr` public types

typedef see-below type;

If Tag is proto::tag::terminal, then type is a typedef for boost::result_of<Domain(proto::expr< proto::tag::terminal, proto::term< A₀ > >)>::type.

Otherwise, type is a typedef for boost::result_of<Domain(proto::expr< Tag, proto::listN< typename proto::result_of::as_child<A>::type...> >)>::type