boost/compute/types/tuple.hpp
//---------------------------------------------------------------------------//
// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
//
// 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
//
// See http://boostorg.github.com/compute for more information.
//---------------------------------------------------------------------------//
#ifndef BOOST_COMPUTE_TYPES_TUPLE_HPP
#define BOOST_COMPUTE_TYPES_TUPLE_HPP
#include <string>
#include <utility>
#include <boost/preprocessor/enum.hpp>
#include <boost/preprocessor/expr_if.hpp>
#include <boost/preprocessor/repetition.hpp>
#include <boost/tuple/tuple.hpp>
#include <boost/compute/config.hpp>
#include <boost/compute/functional/get.hpp>
#include <boost/compute/type_traits/type_name.hpp>
#include <boost/compute/detail/meta_kernel.hpp>
#ifndef BOOST_COMPUTE_NO_STD_TUPLE
#include <tuple>
#endif
namespace boost {
namespace compute {
namespace detail {
// meta_kernel operators for boost::tuple literals
#define BOOST_COMPUTE_PRINT_ELEM(z, n, unused) \
BOOST_PP_EXPR_IF(n, << ", ") \
<< kernel.make_lit(boost::get<n>(x))
#define BOOST_COMPUTE_PRINT_TUPLE(z, n, unused) \
template<BOOST_PP_ENUM_PARAMS(n, class T)> \
inline meta_kernel& \
operator<<(meta_kernel &kernel, \
const boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> &x) \
{ \
return kernel \
<< "(" \
<< type_name<boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> >() \
<< ")" \
<< "{" \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_PRINT_ELEM, ~) \
<< "}"; \
}
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_PRINT_TUPLE, ~)
#undef BOOST_COMPUTE_PRINT_TUPLE
#undef BOOST_COMPUTE_PRINT_ELEM
// inject_type() specializations for boost::tuple
#define BOOST_COMPUTE_INJECT_TYPE(z, n, unused) \
kernel.inject_type<T ## n>();
#define BOOST_COMPUTE_INJECT_DECL(z, n, unused) \
<< " " << type_name<T ## n>() << " v" #n ";\n"
#define BOOST_COMPUTE_INJECT_IMPL(z, n, unused) \
template<BOOST_PP_ENUM_PARAMS(n, class T)> \
struct inject_type_impl<boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> > \
{ \
void operator()(meta_kernel &kernel) \
{ \
typedef boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> tuple_type; \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_INJECT_TYPE, ~) \
std::stringstream declaration; \
declaration << "typedef struct {\n" \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_INJECT_DECL, ~) \
<< "} " << type_name<tuple_type>() << ";\n"; \
kernel.add_type_declaration<tuple_type>(declaration.str()); \
} \
};
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_INJECT_IMPL, ~)
#undef BOOST_COMPUTE_INJECT_IMPL
#undef BOOST_COMPUTE_INJECT_DECL
#undef BOOST_COMPUTE_INJECT_TYPE
#ifdef BOOST_COMPUTE_NO_VARIADIC_TEMPLATES
// type_name() specializations for boost::tuple (without variadic templates)
#define BOOST_COMPUTE_PRINT_TYPE(z, n, unused) \
+ type_name<T ## n>() + "_"
#define BOOST_COMPUTE_PRINT_TYPE_NAME(z, n, unused) \
template<BOOST_PP_ENUM_PARAMS(n, class T)> \
struct type_name_trait<boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> > \
{ \
static const char* value() \
{ \
static std::string name = \
std::string("boost_tuple_") \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_PRINT_TYPE, ~) \
"t"; \
return name.c_str(); \
} \
};
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_PRINT_TYPE_NAME, ~)
#undef BOOST_COMPUTE_PRINT_TYPE_NAME
#undef BOOST_COMPUTE_PRINT_TYPE
#else
template<size_t N, class T, class... Rest>
struct write_tuple_type_names
{
void operator()(std::ostream &os)
{
os << type_name<T>() << "_";
write_tuple_type_names<N-1, Rest...>()(os);
}
};
template<class T, class... Rest>
struct write_tuple_type_names<1, T, Rest...>
{
void operator()(std::ostream &os)
{
os << type_name<T>();
}
};
// type_name<> specialization for boost::tuple<...> (with variadic templates)
template<class... T>
struct type_name_trait<boost::tuple<T...>>
{
static const char* value()
{
static std::string str = make_type_name();
return str.c_str();
}
static std::string make_type_name()
{
typedef typename boost::tuple<T...> tuple_type;
std::stringstream s;
s << "boost_tuple_";
write_tuple_type_names<
boost::tuples::length<tuple_type>::value, T...
>()(s);
s << "_t";
return s.str();
}
};
#endif // BOOST_COMPUTE_NO_VARIADIC_TEMPLATES
#ifndef BOOST_COMPUTE_NO_STD_TUPLE
// type_name<> specialization for std::tuple<T...>
template<class... T>
struct type_name_trait<std::tuple<T...>>
{
static const char* value()
{
static std::string str = make_type_name();
return str.c_str();
}
static std::string make_type_name()
{
typedef typename std::tuple<T...> tuple_type;
std::stringstream s;
s << "std_tuple_";
write_tuple_type_names<
std::tuple_size<tuple_type>::value, T...
>()(s);
s << "_t";
return s.str();
}
};
#endif // BOOST_COMPUTE_NO_STD_TUPLE
// get<N>() result type specialization for boost::tuple<>
#define BOOST_COMPUTE_GET_RESULT_TYPE(z, n, unused) \
template<size_t N, BOOST_PP_ENUM_PARAMS(n, class T)> \
struct get_result_type<N, boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> > \
{ \
typedef typename boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> T; \
typedef typename boost::tuples::element<N, T>::type type; \
};
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_GET_RESULT_TYPE, ~)
#undef BOOST_COMPUTE_GET_RESULT_TYPE
// get<N>() specialization for boost::tuple<>
#define BOOST_COMPUTE_GET_N(z, n, unused) \
template<size_t N, class Arg, BOOST_PP_ENUM_PARAMS(n, class T)> \
inline meta_kernel& operator<<(meta_kernel &kernel, \
const invoked_get<N, Arg, boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> > &expr) \
{ \
typedef typename boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> T; \
BOOST_STATIC_ASSERT(N < size_t(boost::tuples::length<T>::value)); \
kernel.inject_type<T>(); \
return kernel << expr.m_arg << ".v" << int_(N); \
}
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_GET_N, ~)
#undef BOOST_COMPUTE_GET_N
} // end detail namespace
} // end compute namespace
} // end boost namespace
#endif // BOOST_COMPUTE_TYPES_TUPLE_HPP