cpp14/impl/any_of_c.hpp

0001 #ifndef BOOST_METAPARSE_V1_CPP14_IMPL_ANY_OF_C_HPP
0002 #define BOOST_METAPARSE_V1_CPP14_IMPL_ANY_OF_C_HPP
0003
0004 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2017.
0005 // Distributed under the Boost Software License, Version 1.0.
0006 //    (See accompanying file LICENSE_1_0.txt or copy at
0007 //          http://www.boost.org/LICENSE_1_0.txt)
0008
0009 #include <boost/mpl/bool.hpp>
0010
0011 namespace boost
0012 {
0013   namespace metaparse
0014   {
0015     namespace v1
0016     {
0017       namespace impl
0018       {
0019         template <char... Cs>
0020         struct any_of_c
0021         {
0022           typedef any_of_c type;
0023
0024           static constexpr bool run(char c_)
0025           {
0026             const bool values[] = {(c_ == Cs)...};
0027             for (const bool* i = values; i != values + sizeof...(Cs); ++i)
0028             {
0029               if (*i)
0030               {
0031                 return true;
0032               }
0033             }
0034             return false;
0035           }
0036
0037           template <class Chr>
0038           struct apply : boost::mpl::bool_<any_of_c::run(Chr::type::value)> {};
0039         };
0040
0041         template <>
0042         struct any_of_c<>
0043         {
0044           typedef any_of_c type;
0045
0046           template <class>
0047           struct apply : boost::mpl::false_ {};
0048         };
0049       }
0050     }
0051   }
0052 }
0053
0054 #endif
0055