1 /*************************************************************************** 2 * Copyright (C) 2008-2021 by Andrzej Rybczak * 3 * andrzej@rybczak.net * 4 * * 5 * This program is free software; you can redistribute it and/or modify * 6 * it under the terms of the GNU General Public License as published by * 7 * the Free Software Foundation; either version 2 of the License, or * 8 * (at your option) any later version. * 9 * * 10 * This program is distributed in the hope that it will be useful, * 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 13 * GNU General Public License for more details. * 14 * * 15 * You should have received a copy of the GNU General Public License * 16 * along with this program; if not, write to the * 17 * Free Software Foundation, Inc., * 18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. * 19 ***************************************************************************/ 20 21 #ifndef NCMPCPP_UTILITY_SCOPED_VALUE_H 22 #define NCMPCPP_UTILITY_SCOPED_VALUE_H 23 24 template <typename ValueT> 25 struct ScopedValue 26 { ScopedValueScopedValue27 ScopedValue(ValueT &ref, ValueT &&new_value) 28 : m_ref(ref) 29 { 30 m_value = ref; 31 m_ref = std::forward<ValueT>(new_value); 32 } 33 ~ScopedValueScopedValue34 ~ScopedValue() 35 { 36 m_ref = std::move(m_value); 37 } 38 39 private: 40 ValueT &m_ref; 41 ValueT m_value; 42 }; 43 44 #endif // NCMPCPP_UTILITY_SCOPED_VALUE_H 45