Contains definition of the integral_c transform and friends. proto::transform< integral_c< T, I > > A PrimitiveTransform that returns the specified integral constant. proto::transform_impl< Expr, State, Data > T T typename impl::expr_param typename impl::state_param typename impl::data_param I Will not throw. proto::integral_c< char, I > A PrimitiveTransform that returns the specified char. proto::integral_c< int, I > A PrimitiveTransform that returns the specified int. proto::integral_c< long, I > A PrimitiveTransform that returns the specified long. proto::integral_c< std::size_t, I > A PrimitiveTransform that returns the specified std::size_t.