233             struct has_env_var  struct
234               : detail::poly_function<has_env_var<Key> >
269             struct has_env_var<data_type>  struct
270               : detail::poly_function<has_env_var<data_type> >
366             struct has_env_var  struct
367               : BOOST_PROTO_RESULT_OF<functional::has_env_var<Key>(Env)>::type
393 …typename proto::result_of::has_env_var<Env &, Key>::type has_env_var(Env &e BOOST_PROTO_DISABLE_IF…  in has_env_var()  function
395             return functional::has_env_var<Key>()(e);  in has_env_var()
399         typename proto::result_of::has_env_var<Env const &, Key>::type has_env_var(Env const &e)  in has_env_var()  function
401             return functional::has_env_var<Key>()(e);  in has_env_var()
499         struct is_callable<functional::has_env_var<Key> >