mirror of https://gitee.com/bigwinds/arangodb
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_BASICS_CONDITIONAL_DELETER_H
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#define ARANGODB_BASICS_CONDITIONAL_DELETER_H 1
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#include "Basics/Common.h"
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namespace arangodb {
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/// @brief a custom deleter that deletes an object only if the condition is true
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/// to be used in conjunction with unique or shared ptrs when ownership needs to
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/// be transferred
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template <typename T>
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struct ConditionalDeleter {
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explicit ConditionalDeleter(bool& condition) : condition(condition) {}
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void operator()(T* object) {
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if (condition) {
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delete object;
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}
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}
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bool& condition;
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};
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} // namespace arangodb
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#endif
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