#include <env.hpp>
Public Types | |
| typedef mpl::not_< is_same < typename remove_reference < Env >::type::template lookup < Key >::type, key_not_found > >  | result_type | 
Public Member Functions | |
| result_type | operator() (detail::arg< Env >) const | 
| typedef mpl::not_< is_same< typename remove_reference<Env>::type::template lookup<Key>::type , key_not_found > > boost::proto::functional::has_env_var< Key >::impl< Env, IsEnv >::result_type | 
      
  | 
  inline |