ecency-mobile/ios/Pods/boost-for-react-native/boost/compute/lambda/make_tuple.hpp

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4.9 KiB
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//---------------------------------------------------------------------------//
// Copyright (c) 2013-2014 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_LAMBDA_MAKE_TUPLE_HPP
#define BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_HPP
#include <boost/preprocessor/repetition.hpp>
#include <boost/compute/config.hpp>
#include <boost/compute/types/tuple.hpp>
namespace boost {
namespace compute {
namespace lambda {
namespace detail {
// function wrapper for make_tuple() in lambda expressions
struct make_tuple_func
{
template<class Expr, class Args, int N>
struct make_tuple_result_type;
#define BOOST_COMPUTE_MAKE_TUPLE_RESULT_GET_ARG(z, n, unused) \
typedef typename proto::result_of::child_c<Expr, BOOST_PP_INC(n)>::type BOOST_PP_CAT(Arg, n);
#define BOOST_COMPUTE_MAKE_TUPLE_RESULT_GET_ARG_TYPE(z, n, unused) \
typedef typename lambda::result_of<BOOST_PP_CAT(Arg, n), Args>::type BOOST_PP_CAT(T, n);
#define BOOST_COMPUTE_MAKE_TUPLE_RESULT_TYPE(z, n, unused) \
template<class Expr, class Args> \
struct make_tuple_result_type<Expr, Args, n> \
{ \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_MAKE_TUPLE_RESULT_GET_ARG, ~) \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_MAKE_TUPLE_RESULT_GET_ARG_TYPE, ~) \
typedef boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> type; \
};
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_MAKE_TUPLE_RESULT_TYPE, ~)
#undef BOOST_COMPUTE_MAKE_TUPLE_RESULT_GET_ARG
#undef BOOST_COMPUTE_MAKE_TUPLE_RESULT_GET_ARG_TYPE
#undef BOOST_COMPUTE_MAKE_TUPLE_RESULT_TYPE
template<class Expr, class Args>
struct lambda_result
{
typedef typename make_tuple_result_type<
Expr, Args, proto::arity_of<Expr>::value - 1
>::type type;
};
#define BOOST_COMPUTE_MAKE_TUPLE_GET_ARG_TYPE(z, n, unused) \
typedef typename lambda::result_of< \
BOOST_PP_CAT(Arg, n), typename Context::args_tuple \
>::type BOOST_PP_CAT(T, n);
#define BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_APPLY_ARG(z, n, unused) \
BOOST_PP_COMMA_IF(n) BOOST_PP_CAT(const Arg, n) BOOST_PP_CAT(&arg, n)
#define BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_APPLY_EVAL_ARG(z, n, unused) \
BOOST_PP_EXPR_IF(n, ctx.stream << ", ";) proto::eval(BOOST_PP_CAT(arg, n), ctx);
#define BOOST_COMPUTE_MAKE_TUPLE_APPLY(z, n, unused) \
template<class Context, BOOST_PP_ENUM_PARAMS(n, class Arg)> \
static void apply(Context &ctx, BOOST_PP_REPEAT(n, BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_APPLY_ARG, ~)) \
{ \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_MAKE_TUPLE_GET_ARG_TYPE, ~) \
typedef typename boost::tuple<BOOST_PP_ENUM_PARAMS(n, T)> tuple_type; \
ctx.stream.template inject_type<tuple_type>(); \
ctx.stream << "((" << type_name<tuple_type>() << "){"; \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_APPLY_EVAL_ARG, ~) \
ctx.stream << "})"; \
}
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_MAKE_TUPLE_APPLY, ~)
#undef BOOST_COMPUTE_MAKE_TUPLE_GET_ARG_TYPE
#undef BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_APPLY_ARG
#undef BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_APPLY_EVAL_ARG
#undef BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_APPLY
};
} // end detail namespace
#define BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_ARG(z, n, unused) \
BOOST_PP_COMMA_IF(n) BOOST_PP_CAT(const Arg, n) BOOST_PP_CAT(&arg, n)
#define BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_ARG_TYPE(z, n, unused) \
BOOST_PP_COMMA_IF(n) BOOST_PP_CAT(const Arg, n) &
#define BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_REF_ARG(z, n, unused) \
BOOST_PP_COMMA_IF(n) ::boost::ref(BOOST_PP_CAT(arg, n))
#define BOOST_COMPUTE_LAMBDA_MAKE_TUPLE(z, n, unused) \
template<BOOST_PP_ENUM_PARAMS(n, class Arg)> \
inline typename proto::result_of::make_expr< \
proto::tag::function, \
detail::make_tuple_func, \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_ARG_TYPE, ~) \
>::type \
make_tuple(BOOST_PP_REPEAT(n, BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_ARG, ~)) \
{ \
return proto::make_expr<proto::tag::function>( \
detail::make_tuple_func(), \
BOOST_PP_REPEAT(n, BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_REF_ARG, ~) \
); \
}
BOOST_PP_REPEAT_FROM_TO(1, BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_LAMBDA_MAKE_TUPLE, ~)
#undef BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_ARG
#undef BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_ARG_TYPE
#undef BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_REF_ARG
#undef BOOST_COMPUTE_LAMBDA_MAKE_TUPLE
} // end lambda namespace
} // end compute namespace
} // end boost namespace
#endif // BOOST_COMPUTE_LAMBDA_MAKE_TUPLE_HPP