mirror of https://gitee.com/bigwinds/arangodb
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief dynamic_cast or exception
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2011 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 triAGENS GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2009-2011, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef TRIAGENS_BASICS_SAFE_CAST_H
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#define TRIAGENS_BASICS_SAFE_CAST_H 1
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#include <Basics/Common.h>
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#include <Basics/Exceptions.h>
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namespace triagens {
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namespace basics {
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////////////////////////////////////////////////////////////////////////////////
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/// @ingroup Utilities
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/// @brief dynamic_cast or exception
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///
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/// @param[in]
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/// from the from value
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///
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/// @return
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/// return the converted value
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///
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/// @exception
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/// InternalError raised if the cast fails
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////////////////////////////////////////////////////////////////////////////////
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template<typename T, typename F> T safe_cast (F from) {
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T to = dynamic_cast<T>(from);
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if (to == 0) {
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THROW_INTERNAL_ERROR("illegal dynamic cast");
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}
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return to;
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}
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}
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}
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#endif
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