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diff --git a/3rdparty/asio/include/asio/execution/detail/bulk_sender.hpp b/3rdparty/asio/include/asio/execution/detail/bulk_sender.hpp
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+++ b/3rdparty/asio/include/asio/execution/detail/bulk_sender.hpp
@@ -0,0 +1,261 @@
+//
+// execution/detail/bulk_sender.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot 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)
+//
+
+#ifndef ASIO_EXECUTION_DETAIL_BULK_SENDER_HPP
+#define ASIO_EXECUTION_DETAIL_BULK_SENDER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include "asio/detail/type_traits.hpp"
+#include "asio/execution/connect.hpp"
+#include "asio/execution/executor.hpp"
+#include "asio/execution/set_done.hpp"
+#include "asio/execution/set_error.hpp"
+#include "asio/traits/connect_member.hpp"
+#include "asio/traits/set_done_member.hpp"
+#include "asio/traits/set_error_member.hpp"
+#include "asio/traits/set_value_member.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace execution {
+namespace detail {
+
+template <typename Receiver, typename Function, typename Number, typename Index>
+struct bulk_receiver
+{
+ typename remove_cvref<Receiver>::type receiver_;
+ typename decay<Function>::type f_;
+ typename decay<Number>::type n_;
+
+ template <typename R, typename F, typename N>
+ explicit bulk_receiver(ASIO_MOVE_ARG(R) r,
+ ASIO_MOVE_ARG(F) f, ASIO_MOVE_ARG(N) n)
+ : receiver_(ASIO_MOVE_CAST(R)(r)),
+ f_(ASIO_MOVE_CAST(F)(f)),
+ n_(ASIO_MOVE_CAST(N)(n))
+ {
+ }
+
+ void set_value()
+ {
+ for (Index i = 0; i < n_; ++i)
+ f_(i);
+
+ execution::set_value(
+ ASIO_MOVE_OR_LVALUE(
+ typename remove_cvref<Receiver>::type)(receiver_));
+ }
+
+ template <typename Error>
+ void set_error(ASIO_MOVE_ARG(Error) e) ASIO_NOEXCEPT
+ {
+ execution::set_error(
+ ASIO_MOVE_OR_LVALUE(
+ typename remove_cvref<Receiver>::type)(receiver_),
+ ASIO_MOVE_CAST(Error)(e));
+ }
+
+ void set_done() ASIO_NOEXCEPT
+ {
+ execution::set_done(
+ ASIO_MOVE_OR_LVALUE(
+ typename remove_cvref<Receiver>::type)(receiver_));
+ }
+};
+
+template <typename Sender, typename Receiver,
+ typename Function, typename Number>
+struct bulk_receiver_traits
+{
+ typedef bulk_receiver<
+ Receiver, Function, Number,
+ typename execution::executor_index<
+ typename remove_cvref<Sender>::type
+ >::type
+ > type;
+
+#if defined(ASIO_HAS_MOVE)
+ typedef type arg_type;
+#else // defined(ASIO_HAS_MOVE)
+ typedef const type& arg_type;
+#endif // defined(ASIO_HAS_MOVE)
+};
+
+template <typename Sender, typename Function, typename Number>
+struct bulk_sender : sender_base
+{
+ typename remove_cvref<Sender>::type sender_;
+ typename decay<Function>::type f_;
+ typename decay<Number>::type n_;
+
+ template <typename S, typename F, typename N>
+ explicit bulk_sender(ASIO_MOVE_ARG(S) s,
+ ASIO_MOVE_ARG(F) f, ASIO_MOVE_ARG(N) n)
+ : sender_(ASIO_MOVE_CAST(S)(s)),
+ f_(ASIO_MOVE_CAST(F)(f)),
+ n_(ASIO_MOVE_CAST(N)(n))
+ {
+ }
+
+ template <typename Receiver>
+ typename connect_result<
+ ASIO_MOVE_OR_LVALUE_TYPE(typename remove_cvref<Sender>::type),
+ typename bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::type connect(ASIO_MOVE_ARG(Receiver) r,
+ typename enable_if<
+ can_connect<
+ typename remove_cvref<Sender>::type,
+ typename bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::value
+ >::type* = 0) ASIO_RVALUE_REF_QUAL ASIO_NOEXCEPT
+ {
+ return execution::connect(
+ ASIO_MOVE_OR_LVALUE(typename remove_cvref<Sender>::type)(sender_),
+ typename bulk_receiver_traits<Sender, Receiver, Function, Number>::type(
+ ASIO_MOVE_CAST(Receiver)(r),
+ ASIO_MOVE_CAST(typename decay<Function>::type)(f_),
+ ASIO_MOVE_CAST(typename decay<Number>::type)(n_)));
+ }
+
+ template <typename Receiver>
+ typename connect_result<
+ const typename remove_cvref<Sender>::type&,
+ typename bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::type connect(ASIO_MOVE_ARG(Receiver) r,
+ typename enable_if<
+ can_connect<
+ const typename remove_cvref<Sender>::type&,
+ typename bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::value
+ >::type* = 0) const ASIO_LVALUE_REF_QUAL ASIO_NOEXCEPT
+ {
+ return execution::connect(sender_,
+ typename bulk_receiver_traits<Sender, Receiver, Function, Number>::type(
+ ASIO_MOVE_CAST(Receiver)(r), f_, n_));
+ }
+};
+
+} // namespace detail
+} // namespace execution
+namespace traits {
+
+#if !defined(ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
+
+template <typename Receiver, typename Function, typename Number, typename Index>
+struct set_value_member<
+ execution::detail::bulk_receiver<Receiver, Function, Number, Index>,
+ void()>
+{
+ ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef void result_type;
+};
+
+#endif // !defined(ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
+
+#if !defined(ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)
+
+template <typename Receiver, typename Function,
+ typename Number, typename Index, typename Error>
+struct set_error_member<
+ execution::detail::bulk_receiver<Receiver, Function, Number, Index>,
+ Error>
+{
+ ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef void result_type;
+};
+
+#endif // !defined(ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)
+
+#if !defined(ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)
+
+template <typename Receiver, typename Function, typename Number, typename Index>
+struct set_done_member<
+ execution::detail::bulk_receiver<Receiver, Function, Number, Index> >
+{
+ ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef void result_type;
+};
+
+#endif // !defined(ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)
+
+#if !defined(ASIO_HAS_DEDUCED_CONNECT_MEMBER_TRAIT)
+
+template <typename Sender, typename Function,
+ typename Number, typename Receiver>
+struct connect_member<
+ execution::detail::bulk_sender<Sender, Function, Number>,
+ Receiver,
+ typename enable_if<
+ execution::can_connect<
+ ASIO_MOVE_OR_LVALUE_TYPE(typename remove_cvref<Sender>::type),
+ typename execution::detail::bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::value
+ >::type>
+{
+ ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef typename execution::connect_result<
+ ASIO_MOVE_OR_LVALUE_TYPE(typename remove_cvref<Sender>::type),
+ typename execution::detail::bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::type result_type;
+};
+
+template <typename Sender, typename Function,
+ typename Number, typename Receiver>
+struct connect_member<
+ const execution::detail::bulk_sender<Sender, Function, Number>,
+ Receiver,
+ typename enable_if<
+ execution::can_connect<
+ const typename remove_cvref<Sender>::type&,
+ typename execution::detail::bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::value
+ >::type>
+{
+ ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef typename execution::connect_result<
+ const typename remove_cvref<Sender>::type&,
+ typename execution::detail::bulk_receiver_traits<
+ Sender, Receiver, Function, Number
+ >::arg_type
+ >::type result_type;
+};
+
+#endif // !defined(ASIO_HAS_DEDUCED_CONNECT_MEMBER_TRAIT)
+
+} // namespace traits
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_EXECUTION_DETAIL_BULK_SENDER_HPP