projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
1 | //---------------------------------------------------------------------------// |
| 2 | // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com> | |
| 3 | // | |
| 4 | // Distributed under the Boost Software License, Version 1.0 | |
| 5 | // See accompanying file LICENSE_1_0.txt or copy at | |
| 6 | // http://www.boost.org/LICENSE_1_0.txt | |
| 7 | // | |
| 8 | // See http://boostorg.github.com/compute for more information. | |
| 9 | //---------------------------------------------------------------------------// | |
| 10 | ||
| 11 | #ifndef BOOST_COMPUTE_LAMBDA_MAKE_PAIR_HPP | |
| 12 | #define BOOST_COMPUTE_LAMBDA_MAKE_PAIR_HPP | |
| 13 | ||
| 14 | #include <boost/compute/types/pair.hpp> | |
| 15 | ||
| 16 | namespace boost { | |
| 17 | namespace compute { | |
| 18 | namespace lambda { | |
| 19 | namespace detail { | |
| 20 | ||
| 21 | // function wrapper for make_pair() in lambda expressions | |
| 22 | struct make_pair_func | |
| 23 | { | |
| 24 | template<class Expr, class Args> | |
| 25 | struct lambda_result | |
| 26 | { | |
| 27 | typedef typename proto::result_of::child_c<Expr, 1>::type Arg1; | |
| 28 | typedef typename proto::result_of::child_c<Expr, 2>::type Arg2; | |
| 29 | ||
| 30 | typedef typename lambda::result_of<Arg1, Args>::type T1; | |
| 31 | typedef typename lambda::result_of<Arg2, Args>::type T2; | |
| 32 | ||
| 33 | typedef std::pair<T1, T2> type; | |
| 34 | }; | |
| 35 | ||
| 36 | template<class Context, class Arg1, class Arg2> | |
| 37 | static void apply(Context &ctx, const Arg1 &arg1, const Arg2 &arg2) | |
| 38 | { | |
| 39 | typedef typename lambda::result_of<Arg1, typename Context::args_tuple>::type T1; | |
| 40 | typedef typename lambda::result_of<Arg2, typename Context::args_tuple>::type T2; | |
| 41 | ||
| 42 | ctx.stream << "boost_make_pair("; | |
| 43 | ctx.stream << type_name<T1>() << ", "; | |
| 44 | proto::eval(arg1, ctx); | |
| 45 | ctx.stream << ", "; | |
| 46 | ctx.stream << type_name<T2>() << ", "; | |
| 47 | proto::eval(arg2, ctx); | |
| 48 | ctx.stream << ")"; | |
| 49 | } | |
| 50 | }; | |
| 51 | ||
| 52 | } // end detail namespace | |
| 53 | ||
| 54 | // make_pair(first, second) | |
| 55 | template<class Arg1, class Arg2> | |
| 56 | inline typename proto::result_of::make_expr< | |
| 57 | proto::tag::function, detail::make_pair_func, const Arg1&, const Arg2& | |
| 58 | >::type const | |
| 59 | make_pair(const Arg1 &first, const Arg2 &second) | |
| 60 | { | |
| 61 | return proto::make_expr<proto::tag::function>( | |
| 62 | detail::make_pair_func(), ::boost::ref(first), ::boost::ref(second) | |
| 63 | ); | |
| 64 | } | |
| 65 | ||
| 66 | } // end lambda namespace | |
| 67 | } // end compute namespace | |
| 68 | } // end boost namespace | |
| 69 | ||
| 70 | #endif // BOOST_COMPUTE_LAMBDA_MAKE_PAIR_HPP |