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91 lines
3.0 KiB
C++
91 lines
3.0 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_DETAIL_LOGIC_H
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#define SQLPP_DETAIL_LOGIC_H
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#include <ciso646> // Required for some compilers to use aliases for boolean operators
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#include <type_traits>
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namespace sqlpp
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{
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namespace logic
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{
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template <bool... B>
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struct logic_helper;
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// see http://lists.boost.org/Archives/boost/2014/05/212946.php :-)
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// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2086629
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template <bool... B>
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struct all
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{
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using type = std::is_same<logic_helper<B...>, logic_helper<(B or true)...>>;
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};
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template <bool... B>
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using all_t = std::is_same<logic_helper<B...>, logic_helper<(B or true)...>>;
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// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2086629
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template <bool... B>
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struct any
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{
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using type =
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std::integral_constant<bool, not std::is_same<logic_helper<B...>, logic_helper<(B and false)...>>::value>;
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};
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template <bool... B>
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using any_t =
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std::integral_constant<bool, not std::is_same<logic_helper<B...>, logic_helper<(B and false)...>>::value>;
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template <bool... B>
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using none_t = std::is_same<logic_helper<B...>, logic_helper<(B and false)...>>;
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template <bool>
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struct not_impl;
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template <>
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struct not_impl<true>
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{
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using type = std::false_type;
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};
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template <>
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struct not_impl<false>
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{
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using type = std::true_type;
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};
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template <template <typename> class Predicate, typename... T>
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using not_t = typename not_impl<Predicate<T>::value...>::type;
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template <typename T>
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using identity_t = T;
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}
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}
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#endif
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