range/adaptor/define_adaptor.hpp

0001 // Boost.Range library
0002 //
0003 //  Copyright Neil Groves 2010. Use, modification and
0004 //  distribution is subject to the Boost Software License, Version
0005 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0006 //  http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008 // For more information, see http://www.boost.org/libs/range/
0009 //
0010
0011 #ifndef BOOST_RANGE_DEFINE_ADAPTOR_HPP_INCLUDED
0012 #define BOOST_RANGE_DEFINE_ADAPTOR_HPP_INCLUDED
0013
0014 #include <boost/tuple/tuple.hpp>
0015
0016 #define BOOST_DEFINE_RANGE_ADAPTOR( adaptor_name, range_adaptor ) \
0017     struct adaptor_name##_forwarder {}; \
0018     \
0019     template<typename Range> range_adaptor <Range> \
0020         operator|(Range& rng, adaptor_name##_forwarder) \
0021     { \
0022         return range_adaptor <Range>( rng ); \
0023     } \
0024     \
0025     template<typename Range> range_adaptor <const Range> \
0026         operator|(const Range& rng, adaptor_name##_forwarder) \
0027     { \
0028         return range_adaptor <const Range>( rng ); \
0029     } \
0030     \
0031     static adaptor_name##_forwarder adaptor_name = adaptor_name##_forwarder(); \
0032     \
0033     template<typename Range> \
0034     range_adaptor <Range> \
0035     make_##adaptor_name(Range& rng) \
0036     { \
0037         return range_adaptor <Range>(rng); \
0038     } \
0039     \
0040     template<typename Range> \
0041     range_adaptor <const Range> \
0042     make_##adaptor_name(const Range& rng) \
0043     { \
0044         return range_adaptor <const Range>(rng); \
0045     }
0046
0047 #define BOOST_DEFINE_RANGE_ADAPTOR_1( adaptor_name, range_adaptor, arg1_type ) \
0048     struct adaptor_name \
0049     { \
0050         explicit adaptor_name (arg1_type arg1_) \
0051             : arg1(arg1_) {} \
0052         arg1_type arg1; \
0053     }; \
0054     \
0055     template<typename Range> range_adaptor <Range> \
0056         operator|(Range& rng, adaptor_name args) \
0057     { \
0058         return range_adaptor <Range>(rng, args.arg1); \
0059     } \
0060     \
0061     template<typename Range> range_adaptor <const Range> \
0062         operator|(const Range& rng, adaptor_name args) \
0063     { \
0064         return range_adaptor <const Range>(rng, args.arg1); \
0065     } \
0066     \
0067     template<typename Range> \
0068     range_adaptor <Range> \
0069     make_##adaptor_name(Range& rng, arg1_type arg1) \
0070     { \
0071         return range_adaptor <Range>(rng, arg1); \
0072     } \
0073     \
0074     template<typename Range> \
0075     range_adaptor <const Range> \
0076     make_##adaptor_name(const Range& rng, arg1_type arg1) \
0077     { \
0078         return range_adaptor <const Range>(rng, arg1); \
0079     }
0080
0081 #define BOOST_RANGE_ADAPTOR_2( adaptor_name, range_adaptor, arg1_type, arg2_type ) \
0082     struct adaptor_name \
0083     { \
0084         explicit adaptor_name (arg1_type arg1_, arg2_type arg2_) \
0085             : arg1(arg1_), arg2(arg2_) {} \
0086         arg1_type arg1; \
0087         arg2_type arg2; \
0088     }; \
0089     \
0090     template<typename Range> range_adaptor <Range> \
0091     operator|(Range& rng, adaptor_name args) \
0092     { \
0093         return range_adaptor <Range>(rng, args.arg1, args.arg2); \
0094     } \
0095     template<typename Range> \
0096     range_adaptor <Range> \
0097     make_##adaptor_name(Range& rng, arg1_type arg1, arg2_type arg2) \
0098     { \
0099         return range_adaptor <Range>(rng, arg1, arg2); \
0100     } \
0101     template<typename Range> \
0102     range_adaptor <const Range> \
0103     make_##adaptor_name(const Range& rng, arg1_type arg1, arg2_type arg2) \
0104     { \
0105         return range_adaptor <const Range>(rng, arg1, arg2); \
0106     }
0107
0108
0109 #endif // include guard