89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
// Copyright (C) 2012 Vicente J. Botet Escriba
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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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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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// The invoke code is based on the one from libcxx.
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//===----------------------------------------------------------------------===//
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#ifndef BOOST_THREAD_DETAIL_INVOKE_HPP
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#define BOOST_THREAD_DETAIL_INVOKE_HPP
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#include <boost/config.hpp>
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#include <boost/static_assert.hpp>
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namespace boost
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{
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namespace detail
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{
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#if ! defined(BOOST_NO_SFINAE_EXPR) && \
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! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && \
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! defined(BOOST_NO_CXX11_DECLTYPE) && \
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! defined(BOOST_NO_CXX11_DECLTYPE_N3276) && \
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! defined(BOOST_NO_CXX11_AUTO) && \
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! defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
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// // bullets 1 and 2
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template <class Fp, class A0, class ...Args>
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inline
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auto
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invoke(Fp&& f, A0&& a0, Args&& ...args)
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-> decltype((boost::forward<A0>(a0).*f)(boost::forward<Args>(args)...))
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{
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return (boost::forward<A0>(a0).*f)(boost::forward<Args>(args)...);
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}
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template <class Fp, class A0, class ...Args>
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inline
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auto
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invoke(Fp&& f, A0&& a0, Args&& ...args)
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-> decltype(((*boost::forward<A0>(a0)).*f)(boost::forward<Args>(args)...))
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{
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return ((*boost::forward<A0>(a0)).*f)(boost::forward<Args>(args)...);
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}
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// bullets 3 and 4
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template <class Fp, class A0>
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inline
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auto
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invoke(Fp&& f, A0&& a0)
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-> decltype(boost::forward<A0>(a0).*f)
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{
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return boost::forward<A0>(a0).*f;
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}
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template <class Fp, class A0>
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inline
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auto
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invoke(Fp&& f, A0&& a0)
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-> decltype((*boost::forward<A0>(a0)).*f)
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{
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return (*boost::forward<A0>(a0)).*f;
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}
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// bullet 5
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template <class Fp, class ...Args>
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inline
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auto invoke(Fp&& f, Args&& ...args)
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-> decltype(boost::forward<Fp>(f)(boost::forward<Args>(args)...))
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{
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return boost::forward<Fp>(f)(boost::forward<Args>(args)...);
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}
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#endif
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}
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}
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#endif // header
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