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45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
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/*
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* Copyright Andrey Semashev 2007 - 2014.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file null_deleter.hpp
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* \author Andrey Semashev
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* \date 22.04.2007
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*
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* This header contains a \c null_deleter implementation. This is an empty
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* function object that receives a pointer and does nothing with it.
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* Such empty deletion strategy may be convenient, for example, when
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* constructing <tt>shared_ptr</tt>s that point to some object that should not be
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* deleted (i.e. a variable on the stack or some global singleton, like <tt>std::cout</tt>).
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*/
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#ifndef BOOST_CORE_NULL_DELETER_HPP
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#define BOOST_CORE_NULL_DELETER_HPP
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#include <boost/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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//! A function object that does nothing and can be used as an empty deleter for \c shared_ptr
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struct null_deleter
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{
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//! Function object result type
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typedef void result_type;
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/*!
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* Does nothing
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*/
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template< typename T >
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void operator() (T*) const BOOST_NOEXCEPT {}
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};
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} // namespace boost
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#endif // BOOST_CORE_NULL_DELETER_HPP
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