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result_types.hpp
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result_types.hpp
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// Copyright (c) 2020-2023 Hartmut Kaiser
// Copyright (c) 2021 Giannis Gonidelis
// Copyright (c) 2021 Chuanqiu He
//
// SPDX-License-Identifier: BSL-1.0
// 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)
// make sure inspect doesn't get upset about the unproteced min()/max() below
// hpxinspect:nominmax
#pragma once
#include <hpx/config.hpp>
#include <hpx/datastructures/tuple.hpp>
#include <hpx/execution/algorithms/then.hpp>
#include <hpx/execution_base/completion_signatures.hpp>
#include <hpx/modules/futures.hpp>
#include <type_traits>
#include <utility>
namespace hpx::parallel::util {
///////////////////////////////////////////////////////////////////////////
template <typename I1, typename I2>
struct in_in_result
{
HPX_NO_UNIQUE_ADDRESS I1 in1;
HPX_NO_UNIQUE_ADDRESS I2 in2;
template <typename II1, typename II2,
typename Enable =
std::enable_if_t<std::is_convertible_v<I1 const&, II1> &&
std::is_convertible_v<I2 const&, II2>>>
constexpr operator in_in_result<II1, II2>() const&
{
return {in1, in2};
}
template <typename II1, typename II2,
typename Enable = std::enable_if_t<std::is_convertible_v<I1, II1> &&
std::is_convertible_v<I2, II2>>>
constexpr operator in_in_result<II1, II2>() &&
{
return {HPX_MOVE(in1), HPX_MOVE(in2)};
}
template <typename Archive>
void serialize(Archive& ar, unsigned)
{
// clang-format off
ar & in1 & in2;
// clang-format on
}
};
template <typename I1, typename I2>
I2 get_in2_element(util::in_in_result<I1, I2>&& p)
{
return p.in2;
}
template <typename I1, typename I2>
hpx::future<I2> get_in2_element(hpx::future<util::in_in_result<I1, I2>>&& f)
{
return hpx::make_future<I2>(
HPX_MOVE(f), [](util::in_in_result<I1, I2>&& p) { return p.in2; });
}
// clang-format off
template <typename InInResultSender,
HPX_CONCEPT_REQUIRES_(
hpx::execution::experimental::is_sender_v<InInResultSender>
)>
// clang-format on
decltype(auto) get_in2_element(InInResultSender&& result_sender)
{
return hpx::execution::experimental::then(
HPX_FORWARD(InInResultSender, result_sender), [](auto&& result) {
return util::get_in2_element(
HPX_FORWARD(decltype(result), result));
});
}
///////////////////////////////////////////////////////////////////////////
template <typename I, typename O>
struct in_out_result
{
HPX_NO_UNIQUE_ADDRESS I in;
HPX_NO_UNIQUE_ADDRESS O out;
template <typename I2, typename O2,
typename Enable =
std::enable_if_t<std::is_convertible_v<I const&, I2> &&
std::is_convertible_v<O const&, O2>>>
constexpr operator in_out_result<I2, O2>() const&
{
return {in, out};
}
template <typename I2, typename O2,
typename Enable = std::enable_if_t<std::is_convertible_v<I, I2> &&
std::is_convertible_v<O, O2>>>
constexpr operator in_out_result<I2, O2>() &&
{
return {HPX_MOVE(in), HPX_MOVE(out)};
}
template <typename Archive>
void serialize(Archive& ar, unsigned)
{
// clang-format off
ar & in & out;
// clang-format on
}
};
///////////////////////////////////////////////////////////////////////
template <typename I, typename O>
std::pair<I, O> get_pair(util::in_out_result<I, O>&& p)
{
return std::pair<I, O>{p.in, p.out};
}
template <typename I, typename O>
hpx::future<std::pair<I, O>> get_pair(
hpx::future<util::in_out_result<I, O>>&& f)
{
return hpx::make_future<std::pair<I, O>>(
HPX_MOVE(f), [](util::in_out_result<I, O>&& p) {
return std::pair<I, O>{p.in, p.out};
});
}
///////////////////////////////////////////////////////////////////////
template <typename I, typename O>
O get_second_element(util::in_out_result<I, O>&& p)
{
return p.out;
}
template <typename I, typename O>
hpx::future<O> get_second_element(
hpx::future<util::in_out_result<I, O>>&& f)
{
return hpx::make_future<O>(
HPX_MOVE(f), [](util::in_out_result<I, O>&& p) { return p.out; });
}
namespace functional {
struct get_second_element
{
// clang-format off
template <typename T>
decltype(auto) operator()(T&& val) const
{
return hpx::parallel::util::get_second_element(
HPX_FORWARD(T, val));
}
// clang-format on
};
} // namespace functional
// clang-format off
template <typename Sender,
HPX_CONCEPT_REQUIRES_(
hpx::execution::experimental::is_sender_v<Sender>
)>
// clang-format on
decltype(auto) get_second_element(Sender&& sender)
{
return hpx::execution::experimental::then(
HPX_FORWARD(Sender, sender), functional::get_second_element{});
}
// converts a in_out_result into a iterator_range
template <typename I, typename O>
hpx::util::iterator_range<I, O> get_subrange(in_out_result<I, O> const& ior)
{
return hpx::util::iterator_range<I, O>(ior.in, ior.out);
}
template <typename I, typename O>
hpx::future<hpx::util::iterator_range<I, O>> get_subrange(
hpx::future<in_out_result<I, O>>&& ior)
{
return hpx::make_future<hpx::util::iterator_range<I, O>>(
HPX_MOVE(ior), [](in_out_result<I, O>&& ior) {
return hpx::util::iterator_range<I, O>(ior.in, ior.out);
});
}
///////////////////////////////////////////////////////////////////////////
template <typename T>
struct min_max_result
{
HPX_NO_UNIQUE_ADDRESS T min;
HPX_NO_UNIQUE_ADDRESS T max;
template <typename T2,
typename Enable =
std::enable_if_t<std::is_convertible_v<T const&, T>>>
constexpr operator min_max_result<T2>() const&
{
return {min, max};
}
template <typename T2,
typename Enable = std::enable_if_t<std::is_convertible_v<T, T2>>>
constexpr operator min_max_result<T2>() &&
{
return {HPX_MOVE(min), HPX_MOVE(max)};
}
template <typename Archive>
void serialize(Archive& ar, unsigned)
{
// clang-format off
ar & min & max;
// clang-format on
}
};
///////////////////////////////////////////////////////////////////////////
template <typename I1, typename I2, typename O>
struct in_in_out_result
{
HPX_NO_UNIQUE_ADDRESS I1 in1;
HPX_NO_UNIQUE_ADDRESS I2 in2;
HPX_NO_UNIQUE_ADDRESS O out;
template <typename II1, typename II2, typename O1,
typename Enable =
std::enable_if_t<std::is_convertible_v<I1 const&, II1> &&
std::is_convertible_v<I2 const&, II2> &&
std::is_convertible_v<O const&, O1>>>
constexpr operator in_in_out_result<II1, II2, O1>() const&
{
return {in1, in2, out};
}
template <typename II2, typename II1, typename O1,
typename Enable = std::enable_if_t<std::is_convertible_v<I1, II1> &&
std::is_convertible_v<I2, II2> && std::is_convertible_v<O, O1>>>
constexpr operator in_in_out_result<II1, II2, O1>() &&
{
return {HPX_MOVE(in1), HPX_MOVE(in2), HPX_MOVE(out)};
}
template <typename Archive>
void serialize(Archive& ar, unsigned)
{
// clang-format off
ar & in1 & in2 & out;
// clang-format on
}
};
///////////////////////////////////////////////////////////////////////
template <typename I1, typename I2, typename O>
O get_third_element(util::in_in_out_result<I1, I2, O>&& p)
{
return p.out;
}
template <typename I1, typename I2, typename O>
hpx::future<O> get_third_element(
hpx::future<util::in_in_out_result<I1, I2, O>>&& f)
{
return hpx::make_future<O>(
HPX_MOVE(f), [](in_in_out_result<I1, I2, O>&& p) { return p.out; });
}
// clang-format off
template <typename InInOutResultSender,
HPX_CONCEPT_REQUIRES_(
hpx::execution::experimental::is_sender_v<InInOutResultSender>
)>
// clang-format on
decltype(auto) get_third_element(InInOutResultSender&& result_sender)
{
return hpx::execution::experimental::then(
HPX_FORWARD(InInOutResultSender, result_sender), [](auto&& result) {
return util::get_third_element(
HPX_FORWARD(decltype(result), result));
});
}
///////////////////////////////////////////////////////////////////////////
template <typename I, typename O1, typename O2>
struct in_out_out_result
{
HPX_NO_UNIQUE_ADDRESS I in;
HPX_NO_UNIQUE_ADDRESS O1 out1;
HPX_NO_UNIQUE_ADDRESS O2 out2;
template <typename II, typename OO1, typename OO2,
typename Enable =
std::enable_if_t<std::is_convertible_v<I const&, II> &&
std::is_convertible_v<O1 const&, OO1> &&
std::is_convertible_v<O2 const&, OO2>>>
constexpr operator in_out_out_result<II, OO1, OO2>() const&
{
return {in, out1, out2};
}
template <typename II, typename OO1, typename OO2,
typename Enable = std::enable_if_t<std::is_convertible_v<I, II> &&
std::is_convertible_v<O1, OO1> &&
std::is_convertible_v<O2, OO2>>>
constexpr operator in_out_out_result<II, OO1, OO2>() &&
{
return {HPX_MOVE(in), HPX_MOVE(out1), HPX_MOVE(out2)};
}
template <typename Archive>
void serialize(Archive& ar, unsigned)
{
// clang-format off
ar & in & out1 & out2;
// clang-format on
}
};
template <typename... Ts>
constexpr HPX_FORCEINLINE in_out_out_result<Ts...> make_in_out_out_result(
hpx::tuple<Ts...>&& t)
{
static_assert(hpx::tuple_size<hpx::tuple<Ts...>>::value == 3,
"size of tuple should be 3 to convert to in_out_out_result");
using result_type = in_out_out_result<Ts...>;
return result_type{hpx::get<0>(t), hpx::get<1>(t), hpx::get<2>(t)};
}
template <typename... Ts>
hpx::future<in_out_out_result<Ts...>> make_in_out_out_result(
hpx::future<hpx::tuple<Ts...>>&& f)
{
static_assert(hpx::tuple_size<hpx::tuple<Ts...>>::value == 3,
"size of tuple should be 3 to convert to in_out_out_result");
using result_type = in_out_out_result<Ts...>;
return hpx::make_future<result_type>(
HPX_MOVE(f), [](hpx::tuple<Ts...>&& t) -> result_type {
return make_in_out_out_result(HPX_MOVE(t));
});
}
///////////////////////////////////////////////////////////////////////////
template <typename I, typename F>
struct in_fun_result
{
HPX_NO_UNIQUE_ADDRESS I in;
HPX_NO_UNIQUE_ADDRESS F fun;
template <typename I2, typename F2,
typename Enable =
std::enable_if_t<std::is_convertible_v<I const&, I2> &&
std::is_convertible_v<F const&, F2>>>
constexpr operator in_fun_result<I2, F2>() const&
{
return {in, fun};
}
template <typename I2, typename F2,
typename Enable = std::enable_if_t<std::is_convertible_v<I, I2> &&
std::is_convertible_v<F, F2>>>
constexpr operator in_fun_result<I2, F2>() &&
{
return {HPX_MOVE(in), HPX_MOVE(fun)};
}
template <typename Archive>
void serialize(Archive& ar, unsigned)
{
// clang-format off
ar & in & fun;
// clang-format on
}
};
template <typename Iterator, typename Sentinel = Iterator>
hpx::util::iterator_range<Iterator, Sentinel> make_subrange(
Iterator iterator, Sentinel sentinel)
{
return hpx::util::iterator_range(iterator, sentinel);
}
template <typename Iterator, typename Sentinel = Iterator>
hpx::future<hpx::util::iterator_range<Iterator, Sentinel>> make_subrange(
hpx::future<Iterator>&& iterator, Sentinel sentinel)
{
return hpx::make_future<hpx::util::iterator_range<Iterator, Sentinel>>(
HPX_MOVE(iterator), [sentinel](Iterator&& it) {
return hpx::util::iterator_range(it, sentinel);
});
}
///////////////////////////////////////////////////////////////////////////
namespace detail {
template <typename ZipIter>
in_out_result<typename hpx::tuple_element<0,
typename ZipIter::iterator_tuple_type>::type,
typename hpx::tuple_element<1,
typename ZipIter::iterator_tuple_type>::type>
get_in_out_result(ZipIter&& zipiter)
{
using iterator_tuple_type = typename ZipIter::iterator_tuple_type;
using result_type = in_out_result<
typename hpx::tuple_element<0, iterator_tuple_type>::type,
typename hpx::tuple_element<1, iterator_tuple_type>::type>;
iterator_tuple_type t = zipiter.get_iterator_tuple();
return result_type{hpx::get<0>(t), hpx::get<1>(t)};
}
// clang-format off
template <typename ZipIterSender,
HPX_CONCEPT_REQUIRES_(
hpx::execution::experimental::is_sender_v<ZipIterSender>
)>
// clang-format on
decltype(auto) get_in_out_result(ZipIterSender&& zipiter_sender)
{
return hpx::execution::experimental::then(
HPX_FORWARD(ZipIterSender, zipiter_sender), [](auto&& zipiter) {
return get_in_out_result(
HPX_FORWARD(decltype(zipiter), zipiter));
});
}
template <typename ZipIter>
hpx::future<
in_out_result<typename hpx::tuple_element<0,
typename ZipIter::iterator_tuple_type>::type,
typename hpx::tuple_element<1,
typename ZipIter::iterator_tuple_type>::type>>
get_in_out_result(hpx::future<ZipIter>&& zipiter)
{
using iterator_tuple_type = typename ZipIter::iterator_tuple_type;
using result_type = in_out_result<
typename hpx::tuple_element<0, iterator_tuple_type>::type,
typename hpx::tuple_element<1, iterator_tuple_type>::type>;
return hpx::make_future<result_type>(
HPX_MOVE(zipiter), [](ZipIter zipiter) {
return get_in_out_result(HPX_MOVE(zipiter));
});
}
template <typename ZipIter>
min_max_result<typename hpx::tuple_element<0,
typename ZipIter::iterator_tuple_type>::type>
get_min_max_result(ZipIter&& zipiter)
{
using iterator_tuple_type = typename ZipIter::iterator_tuple_type;
using result_type = min_max_result<
typename hpx::tuple_element<0, iterator_tuple_type>::type>;
iterator_tuple_type t = zipiter.get_iterator_tuple();
return result_type{hpx::get<0>(t), hpx::get<1>(t)};
}
template <typename ZipIter>
hpx::future<min_max_result<typename hpx::tuple_element<0,
typename ZipIter::iterator_tuple_type>::type>>
get_min_max_result(hpx::future<ZipIter>&& zipiter)
{
using iterator_tuple_type = typename ZipIter::iterator_tuple_type;
using result_type = min_max_result<
typename hpx::tuple_element<0, iterator_tuple_type>::type>;
return hpx::make_future<result_type>(
HPX_MOVE(zipiter), [](ZipIter zipiter) {
return get_min_max_result(HPX_MOVE(zipiter));
});
}
template <typename ZipIter>
in_in_out_result<typename hpx::tuple_element<0,
typename ZipIter::iterator_tuple_type>::type,
typename hpx::tuple_element<1,
typename ZipIter::iterator_tuple_type>::type,
typename hpx::tuple_element<2,
typename ZipIter::iterator_tuple_type>::type>
get_in_in_out_result(ZipIter&& zipiter)
{
using iterator_tuple_type = typename ZipIter::iterator_tuple_type;
using result_type = in_in_out_result<
typename hpx::tuple_element<0, iterator_tuple_type>::type,
typename hpx::tuple_element<1, iterator_tuple_type>::type,
typename hpx::tuple_element<2, iterator_tuple_type>::type>;
iterator_tuple_type t = zipiter.get_iterator_tuple();
return result_type{hpx::get<0>(t), hpx::get<1>(t), hpx::get<2>(t)};
}
// clang-format off
template <typename ZipIterSender,
HPX_CONCEPT_REQUIRES_(
hpx::execution::experimental::is_sender_v<ZipIterSender>
)>
// clang-format on
decltype(auto) get_in_in_out_result(ZipIterSender&& zipiter_sender)
{
return hpx::execution::experimental::then(
HPX_FORWARD(ZipIterSender, zipiter_sender), [](auto&& zipiter) {
return get_in_in_out_result(
HPX_FORWARD(decltype(zipiter), zipiter));
});
}
template <typename ZipIter>
hpx::future<
in_in_out_result<typename hpx::tuple_element<0,
typename ZipIter::iterator_tuple_type>::type,
typename hpx::tuple_element<1,
typename ZipIter::iterator_tuple_type>::type,
typename hpx::tuple_element<2,
typename ZipIter::iterator_tuple_type>::type>>
get_in_in_out_result(hpx::future<ZipIter>&& zipiter)
{
using iterator_tuple_type = typename ZipIter::iterator_tuple_type;
using result_type = in_in_out_result<
typename hpx::tuple_element<0, iterator_tuple_type>::type,
typename hpx::tuple_element<1, iterator_tuple_type>::type,
typename hpx::tuple_element<2, iterator_tuple_type>::type>;
return hpx::make_future<result_type>(
HPX_MOVE(zipiter), [](ZipIter zipiter) {
return get_in_in_out_result(HPX_MOVE(zipiter));
});
}
} // namespace detail
} // namespace hpx::parallel::util
namespace hpx::ranges {
using hpx::parallel::util::in_fun_result;
using hpx::parallel::util::in_in_out_result;
using hpx::parallel::util::in_in_result;
using hpx::parallel::util::in_out_out_result;
using hpx::parallel::util::in_out_result;
using hpx::parallel::util::min_max_result;
} // namespace hpx::ranges
// namespace hpx::ranges