boost::yap::expression_function
// In header: <boost/yap/algorithm.hpp> template<typename Expr> struct expression_function { // public member functions template<typename... U> decltype(auto) operator()(U &&...); // public data members Expr expr; };
A callable type that evaluates its contained expression when called.
See Also:
make_expression_function()
expression_function
template<typename... U> decltype(auto) operator()(U &&... u);