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239 lines
8.6 KiB
C++
239 lines
8.6 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2006-2014. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/move for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_MOVE_MAKE_UNIQUE_HPP_INCLUDED
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#define BOOST_MOVE_MAKE_UNIQUE_HPP_INCLUDED
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/move/detail/config_begin.hpp>
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#include <boost/move/detail/workaround.hpp>
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#include <boost/move/utility_core.hpp>
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#include <boost/move/unique_ptr.hpp>
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#include <cstddef> //for std::size_t
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#include <boost/move/detail/unique_ptr_meta_utils.hpp>
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#ifdef BOOST_NO_CXX11_VARIADIC_TEMPLATES
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# include <boost/move/detail/fwd_macros.hpp>
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#endif
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//!\file
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//! Defines "make_unique" functions, which are factories to create instances
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//! of unique_ptr depending on the passed arguments.
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//!
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//! This header can be a bit heavyweight in C++03 compilers due to the use of the
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//! preprocessor library, that's why it's a a separate header from <tt>unique_ptr.hpp</tt>
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#if !defined(BOOST_MOVE_DOXYGEN_INVOKED)
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namespace std { //no namespace versioning in clang+libc++
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struct nothrow_t;
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} //namespace std {
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namespace boost{
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namespace move_upmu {
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//Compile time switch between
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//single element, unknown bound array
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//and known bound array
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template<class T>
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struct unique_ptr_if
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{
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typedef ::boost::movelib::unique_ptr<T> t_is_not_array;
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};
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template<class T>
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struct unique_ptr_if<T[]>
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{
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typedef ::boost::movelib::unique_ptr<T[]> t_is_array_of_unknown_bound;
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};
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template<class T, std::size_t N>
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struct unique_ptr_if<T[N]>
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{
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typedef void t_is_array_of_known_bound;
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};
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template <int Dummy = 0>
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struct nothrow_holder
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{
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static std::nothrow_t *pnothrow;
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};
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template <int Dummy>
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std::nothrow_t *nothrow_holder<Dummy>::pnothrow =
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reinterpret_cast<std::nothrow_t *>(0x1234); //Avoid reference to null errors in sanitizers
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} //namespace move_upmu {
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} //namespace boost{
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#endif //!defined(BOOST_MOVE_DOXYGEN_INVOKED)
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namespace boost{
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namespace movelib {
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#if defined(BOOST_MOVE_DOXYGEN_INVOKED) || !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is not an array.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new T(std::forward<Args>(args)...))</tt>.
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template<class T, class... Args>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_not_array)
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make_unique(BOOST_FWD_REF(Args)... args)
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{ return unique_ptr<T>(new T(::boost::forward<Args>(args)...)); }
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is not an array.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new T(std::nothrow)(std::forward<Args>(args)...))</tt>.
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template<class T, class... Args>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_not_array)
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make_unique_nothrow(BOOST_FWD_REF(Args)... args)
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{ return unique_ptr<T>(new (*boost::move_upmu::nothrow_holder<>::pnothrow)T(::boost::forward<Args>(args)...)); }
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#else
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#define BOOST_MOVE_MAKE_UNIQUE_CODE(N)\
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template<class T BOOST_MOVE_I##N BOOST_MOVE_CLASS##N>\
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_not_array\
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make_unique( BOOST_MOVE_UREF##N)\
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{ return unique_ptr<T>( new T( BOOST_MOVE_FWD##N ) ); }\
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\
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template<class T BOOST_MOVE_I##N BOOST_MOVE_CLASS##N>\
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_not_array\
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make_unique_nothrow( BOOST_MOVE_UREF##N)\
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{ return unique_ptr<T>( new (*boost::move_upmu::nothrow_holder<>::pnothrow)T ( BOOST_MOVE_FWD##N ) ); }\
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//
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BOOST_MOVE_ITERATE_0TO9(BOOST_MOVE_MAKE_UNIQUE_CODE)
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#undef BOOST_MOVE_MAKE_UNIQUE_CODE
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#endif
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is not an array.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new T)</tt> (default initialization)
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template<class T>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_not_array)
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make_unique_definit()
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{
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return unique_ptr<T>(new T);
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}
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is not an array.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new T(std::nothrow)</tt> (default initialization)
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template<class T>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_not_array)
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make_unique_nothrow_definit()
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{
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return unique_ptr<T>(new (*boost::move_upmu::nothrow_holder<>::pnothrow)T);
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}
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is an array of
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//! unknown bound.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new remove_extent_t<T>[n]())</tt> (value initialization)
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template<class T>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_unknown_bound)
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make_unique(std::size_t n)
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{
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typedef typename ::boost::move_upmu::remove_extent<T>::type U;
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return unique_ptr<T>(new U[n]());
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}
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is an array of
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//! unknown bound.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new (std::nothrow)remove_extent_t<T>[n]())</tt> (value initialization)
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template<class T>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_unknown_bound)
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make_unique_nothrow(std::size_t n)
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{
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typedef typename ::boost::move_upmu::remove_extent<T>::type U;
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return unique_ptr<T>(new (*boost::move_upmu::nothrow_holder<>::pnothrow)U[n]());
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}
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is an array of
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//! unknown bound.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new remove_extent_t<T>[n])</tt> (default initialization)
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template<class T>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_unknown_bound)
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make_unique_definit(std::size_t n)
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{
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typedef typename ::boost::move_upmu::remove_extent<T>::type U;
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return unique_ptr<T>(new U[n]);
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}
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is an array of
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//! unknown bound.
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//!
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//! <b>Returns</b>: <tt>unique_ptr<T>(new (std::nothrow)remove_extent_t<T>[n])</tt> (default initialization)
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template<class T>
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inline BOOST_MOVE_DOC1ST(unique_ptr<T>,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_unknown_bound)
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make_unique_nothrow_definit(std::size_t n)
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{
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typedef typename ::boost::move_upmu::remove_extent<T>::type U;
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return unique_ptr<T>(new (*boost::move_upmu::nothrow_holder<>::pnothrow) U[n]);
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}
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#if !defined(BOOST_NO_CXX11_DELETED_FUNCTIONS)
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is
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//! an array of known bound.
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template<class T, class... Args>
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inline BOOST_MOVE_DOC1ST(unspecified,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_known_bound)
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make_unique(BOOST_FWD_REF(Args) ...) = delete;
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is
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//! an array of known bound.
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template<class T, class... Args>
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inline BOOST_MOVE_DOC1ST(unspecified,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_known_bound)
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make_unique_definit(BOOST_FWD_REF(Args) ...) = delete;
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is
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//! an array of known bound.
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template<class T, class... Args>
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inline BOOST_MOVE_DOC1ST(unspecified,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_known_bound)
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make_unique_nothrow(BOOST_FWD_REF(Args) ...) = delete;
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//! <b>Remarks</b>: This function shall not participate in overload resolution unless T is
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//! an array of known bound.
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template<class T, class... Args>
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inline BOOST_MOVE_DOC1ST(unspecified,
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typename ::boost::move_upmu::unique_ptr_if<T>::t_is_array_of_known_bound)
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make_unique_nothrow_definit(BOOST_FWD_REF(Args) ...) = delete;
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#endif
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} //namespace movelib {
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} //namespace boost{
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#include <boost/move/detail/config_end.hpp>
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#endif //#ifndef BOOST_MOVE_MAKE_UNIQUE_HPP_INCLUDED
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