#ifndef BOOST_METAPARSE_V1_IMPL_ONE_OF_FWD_OP_HPP #define BOOST_METAPARSE_V1_IMPL_ONE_OF_FWD_OP_HPP // Copyright Abel Sinkovics (abel@sinkovics.hu) 2015. // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) #include <boost/metaparse/v1/is_error.hpp> #include <boost/metaparse/v1/cpp98/impl/later_result.hpp> #include <boost/mpl/eval_if.hpp> namespace boost { namespace metaparse { namespace v1 { namespace impl { template <class S, class Pos> struct one_of_fwd_op { typedef one_of_fwd_op type; template <class State, class P> struct apply : boost::mpl::eval_if< typename is_error<State>::type, boost::mpl::eval_if< typename is_error<typename P::template apply<S, Pos> >::type, later_result<State, typename P::template apply<S, Pos> >, typename P::template apply<S, Pos> >, State > {}; }; } } } } #endif