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76 lines
2.9 KiB
C++
76 lines
2.9 KiB
C++
/*
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* Copyright (c) 2013-2015, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SQLPP_OPERAND_CHECK_H
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#define SQLPP_OPERAND_CHECK_H
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#include <sqlpp11/wrap_operand.h>
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#include <sqlpp11/detail/enable_if.h>
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namespace sqlpp
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{
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template <typename T, template <typename> class Pred, typename Enable = void>
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struct unary_operand_check
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{
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};
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template <typename T, template <typename> class Pred>
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struct unary_operand_check<T, Pred, detail::enable_if_t<Pred<T>::value>>
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{
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using type = void;
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};
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template <typename T, template <typename> class Pred>
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using unary_operand_check_t = typename unary_operand_check<wrap_operand_t<T>, Pred>::type;
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template <typename T, template <typename> class Pred>
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using unwrapped_unary_operand_check_t = typename unary_operand_check<T, Pred>::type;
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template <typename L,
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template <typename> class LPred,
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typename R,
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template <typename> class RPred,
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typename Enable = void>
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struct binary_operand_check
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{
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};
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template <typename L, template <typename> class LPred, typename R, template <typename> class RPred>
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struct binary_operand_check<L, LPred, R, RPred, detail::enable_if_t<LPred<L>::value and RPred<R>::value>>
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{
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using type = void;
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};
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template <typename L, template <typename> class LPred, typename R, template <typename> class RPred>
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using binary_operand_check_t =
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typename binary_operand_check<wrap_operand_t<L>, LPred, wrap_operand_t<R>, RPred>::type;
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template <typename L, template <typename> class LPred, typename R, template <typename> class RPred>
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using unwrapped_binary_operand_check_t = typename binary_operand_check<L, LPred, R, RPred>::type;
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}
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#endif
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