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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_COPY_TUPLE_ARGS_H
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#define SQLPP_DETAIL_COPY_TUPLE_ARGS_H
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#include <tuple>
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#include <sqlpp11/auto_alias.h>
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namespace sqlpp
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{
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template <typename Table>
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struct all_of_t;
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namespace detail
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{
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template <typename T>
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struct as_column_tuple
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{
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static std::tuple<auto_alias_t<T>> _(T t)
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{
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return std::tuple<auto_alias_t<T>>(auto_alias_t<T>{t});
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}
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};
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template <typename T>
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struct as_column_tuple<all_of_t<T>>
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{
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static typename all_of_t<T>::_column_tuple_t _(all_of_t<T>)
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{
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return {};
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}
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};
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template <typename... Args>
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struct as_column_tuple<std::tuple<Args...>>
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{
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static std::tuple<auto_alias_t<Args>...> _(std::tuple<Args...> t)
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{
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return t;
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}
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};
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template <template <typename, typename...> class Target, typename First, typename T>
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struct copy_tuple_args_impl
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{
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static_assert(wrong_t<copy_tuple_args_impl>::value, "copy_tuple_args must be called with a tuple");
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};
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template <template <typename First, typename...> class Target, typename First, typename... Args>
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struct copy_tuple_args_impl<Target, First, std::tuple<Args...>>
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{
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using type = Target<First, Args...>;
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};
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template <template <typename First, typename...> class Target, typename First, typename T>
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using copy_tuple_args_t = typename copy_tuple_args_impl<Target, First, T>::type;
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template <typename... Columns>
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auto column_tuple_merge(Columns... columns) -> decltype(std::tuple_cat(as_column_tuple<Columns>::_(columns)...))
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{
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return std::tuple_cat(as_column_tuple<Columns>::_(columns)...);
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}
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}
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}
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#endif
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