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/*
* Copyright (c) 2009-2020, Albertas Vyšniauskas
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
* * Neither the name of the software author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef GPICK_COMMON_CAST_TO_VARIANT_H_
#define GPICK_COMMON_CAST_TO_VARIANT_H_
#include <boost/variant.hpp>
namespace common {
template<typename TResult, typename TValue>
TResult castToVariantInternal(TValue value) {
return TResult(value);
}
template<typename TResult, typename TValue, typename Cast1, typename... CastN>
TResult castToVariantInternal(TValue value) {
auto result = dynamic_cast<Cast1>(value);
if (result)
return TResult(result);
else
return castToVariantInternal<TResult, TValue, CastN...>(value);
}
template<typename TValue, typename Cast1, typename... CastN>
boost::variant<TValue, Cast1, CastN...> castToVariant(TValue value) {
return castToVariantInternal<boost::variant<TValue, Cast1, CastN...>, TValue, Cast1, CastN...>(value);
}
}
#endif /* GPICK_COMMON_CAST_TO_VARIANT_H_ */
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