//---------------------------------------------------------------------------//
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// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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// See http://boostorg.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#ifndef BOOST_COMPUTE_TYPES_PAIR_HPP
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#define BOOST_COMPUTE_TYPES_PAIR_HPP
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#include <string>
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#include <utility>
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#include <boost/compute/functional/get.hpp>
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#include <boost/compute/type_traits/type_definition.hpp>
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#include <boost/compute/type_traits/type_name.hpp>
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#include <boost/compute/detail/meta_kernel.hpp>
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namespace boost {
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namespace compute {
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namespace detail {
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// meta_kernel operator for std::pair literals
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template<class T1, class T2>
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inline meta_kernel&
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operator<<(meta_kernel &kernel, const std::pair<T1, T2> &x)
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{
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kernel << "(" << type_name<std::pair<T1, T2> >() << ")"
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<< "{" << kernel.make_lit(x.first) << ", "
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<< kernel.make_lit(x.second) << "}";
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return kernel;
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}
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// inject_type() specialization for std::pair
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template<class T1, class T2>
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struct inject_type_impl<std::pair<T1, T2> >
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{
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void operator()(meta_kernel &kernel)
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{
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typedef std::pair<T1, T2> pair_type;
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kernel.inject_type<T1>();
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kernel.inject_type<T2>();
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kernel.add_type_declaration<pair_type>(type_definition<pair_type>());
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}
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};
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// get<N>() result type specialization for std::pair<>
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template<class T1, class T2>
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struct get_result_type<0, std::pair<T1, T2> >
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{
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typedef T1 type;
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};
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template<class T1, class T2>
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struct get_result_type<1, std::pair<T1, T2> >
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{
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typedef T2 type;
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};
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// get<N>() specialization for std::pair<>
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template<size_t N, class Arg, class T1, class T2>
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inline meta_kernel& operator<<(meta_kernel &kernel,
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const invoked_get<N, Arg, std::pair<T1, T2> > &expr)
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{
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kernel.inject_type<std::pair<T1, T2> >();
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return kernel << expr.m_arg << (N == 0 ? ".first" : ".second");
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}
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} // end detail namespace
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namespace detail {
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// type_name() specialization for std::pair
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template<class T1, class T2>
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struct type_name_trait<std::pair<T1, T2> >
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{
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static const char* value()
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{
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static std::string name =
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std::string("_pair_") +
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type_name<T1>() + "_" + type_name<T2>() +
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"_t";
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return name.c_str();
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}
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};
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// type_definition() specialization for std::pair
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template<class T1, class T2>
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struct type_definition_trait<std::pair<T1, T2> >
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{
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static std::string value()
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{
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typedef std::pair<T1, T2> pair_type;
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std::stringstream declaration;
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declaration << "typedef struct {\n"
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<< " " << type_name<T1>() << " first;\n"
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<< " " << type_name<T2>() << " second;\n"
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<< "} " << type_name<pair_type>() << ";\n";
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return declaration.str();
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}
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};
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} // end detail namespace
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} // end compute namespace
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} // end boost namespace
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#endif // BOOST_COMPUTE_TYPES_PAIR_HPP
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