#include <env.hpp>
Public Types | |
typedef mpl::not_< is_same < typename remove_reference < Env >::type::template lookup < data_type >::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<data_type>::type , key_not_found > > boost::proto::functional::has_env_var< data_type >::impl< Env, IsEnv >::result_type |
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inline |