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Diffstat (limited to 'boost/core/null_deleter.hpp')
| -rw-r--r-- | boost/core/null_deleter.hpp | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/boost/core/null_deleter.hpp b/boost/core/null_deleter.hpp new file mode 100644 index 0000000000..f0af59034e --- /dev/null +++ b/boost/core/null_deleter.hpp @@ -0,0 +1,44 @@ +/* + * Copyright Andrey Semashev 2007 - 2014. + * 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) + */ +/*! + * \file null_deleter.hpp + * \author Andrey Semashev + * \date 22.04.2007 + * + * This header contains a \c null_deleter implementation. This is an empty + * function object that receives a pointer and does nothing with it. + * Such empty deletion strategy may be convenient, for example, when + * constructing <tt>shared_ptr</tt>s that point to some object that should not be + * deleted (i.e. a variable on the stack or some global singleton, like <tt>std::cout</tt>). + */ + +#ifndef BOOST_CORE_NULL_DELETER_HPP +#define BOOST_CORE_NULL_DELETER_HPP + +#include <boost/config.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +namespace boost { + +//! A function object that does nothing and can be used as an empty deleter for \c shared_ptr +struct null_deleter +{ + //! Function object result type + typedef void result_type; + /*! + * Does nothing + */ + template< typename T > + void operator() (T*) const BOOST_NOEXCEPT {} +}; + +} // namespace boost + +#endif // BOOST_CORE_NULL_DELETER_HPP |