//
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// execution/invocable_archetype.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_EXECUTION_INVOCABLE_ARCHETYPE_HPP
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#define BOOST_ASIO_EXECUTION_INVOCABLE_ARCHETYPE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/asio/detail/config.hpp>
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#include <boost/asio/detail/type_traits.hpp>
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#include <boost/asio/detail/variadic_templates.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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namespace execution {
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/// An archetypal function object used for determining adherence to the
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/// execution::executor concept.
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struct invocable_archetype
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{
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#if !defined(GENERATING_DOCUMENTATION)
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// Necessary for compatibility with a C++03 implementation of result_of.
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typedef void result_type;
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#endif // !defined(GENERATING_DOCUMENTATION)
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#if defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES) \
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|| defined(GENERATING_DOCUMENTATION)
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/// Function call operator.
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template <typename... Args>
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void operator()(BOOST_ASIO_MOVE_ARG(Args)...)
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{
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}
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#else // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
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// || defined(GENERATING_DOCUMENTATION)
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void operator()()
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{
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}
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#define BOOST_ASIO_PRIVATE_INVOCABLE_ARCHETYPE_CALL_DEF(n) \
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template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \
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void operator()(BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS(n)) \
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{ \
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} \
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/**/
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BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_INVOCABLE_ARCHETYPE_CALL_DEF)
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#undef BOOST_ASIO_PRIVATE_INVOCABLE_ARCHETYPE_CALL_DEF
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#endif // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
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// || defined(GENERATING_DOCUMENTATION)
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};
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} // namespace execution
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#endif // BOOST_ASIO_EXECUTION_INVOCABLE_ARCHETYPE_HPP
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