12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970 |
- #ifndef BOOST_METAPARSE_V1_CPP98_IMPL_IS_NONE_HPP
- #define BOOST_METAPARSE_V1_CPP98_IMPL_IS_NONE_HPP
- // Copyright Abel Sinkovics (abel@sinkovics.hu) 2013.
- // 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/limit_one_char_except_size.hpp>
- #include <boost/mpl/eval_if.hpp>
- #include <boost/mpl/bool.hpp>
- #include <boost/preprocessor/cat.hpp>
- #include <boost/preprocessor/arithmetic/dec.hpp>
- #include <boost/preprocessor/repetition/enum_params.hpp>
- #include <boost/preprocessor/repetition/repeat_from_to.hpp>
- namespace boost
- {
- namespace metaparse
- {
- namespace v1
- {
- namespace impl
- {
- template <class Stub = int>
- struct is_none0
- {
- template <class C>
- struct apply : boost::mpl::true_ {};
- };
- #ifdef BOOST_METAPARSE_DEFINE_IS_NONE
- # error BOOST_METAPARSE_DEFINE_IS_NONE already defined
- #endif
- #define BOOST_METAPARSE_DEFINE_IS_NONE(z, n, unused) \
- template <BOOST_PP_ENUM_PARAMS(n, class T)> \
- struct BOOST_PP_CAT(is_none, n) \
- { \
- template <class C> \
- struct apply : \
- boost::mpl::eval_if< \
- boost::mpl::bool_< \
- C::type::value \
- == BOOST_PP_CAT(T, BOOST_PP_DEC(n))::type::value \
- >, \
- boost::mpl::false_, \
- typename BOOST_PP_CAT(is_none, BOOST_PP_DEC(n))< \
- BOOST_PP_ENUM_PARAMS(BOOST_PP_DEC(n), T) \
- >::template apply<C> \
- > \
- {}; \
- };
- BOOST_PP_REPEAT_FROM_TO(
- 1,
- BOOST_METAPARSE_LIMIT_ONE_CHAR_EXCEPT_SIZE,
- BOOST_METAPARSE_DEFINE_IS_NONE,
- ~
- )
- #undef BOOST_METAPARSE_DEFINE_IS_NONE
- }
- }
- }
- }
- #endif
|