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114 lines
3.1 KiB
C++
114 lines
3.1 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_INTERPRETABLE_LIST_H
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#define SQLPP_INTERPRETABLE_LIST_H
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#include <vector>
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#include <sqlpp11/interpretable.h>
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namespace sqlpp
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{
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template <typename Db>
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struct interpretable_list_t
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{
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std::vector<interpretable_t<Db>> _serializables;
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std::size_t size() const
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{
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return _serializables.size();
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}
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bool empty() const
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{
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return _serializables.empty();
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}
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template <typename Expr>
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void emplace_back(Expr expr)
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{
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_serializables.emplace_back(expr);
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}
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};
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template <>
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struct interpretable_list_t<void>
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{
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static constexpr std::size_t size()
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{
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return 0;
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}
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static constexpr bool empty()
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{
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return true;
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}
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};
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template <typename Context, typename List>
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struct serializable_list_interpreter_t
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{
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using T = List;
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template <typename Separator>
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static Context& _(const T& t, const Separator& separator, Context& context)
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{
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bool first = true;
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for (const auto entry : t._serializables)
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{
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if (not first)
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{
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context << separator;
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}
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first = false;
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serialize(entry, context);
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}
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return context;
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}
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};
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template <typename Context>
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struct serializable_list_interpreter_t<Context, interpretable_list_t<void>>
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{
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using T = interpretable_list_t<void>;
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template <typename Separator>
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static Context& _(const T&, const Separator& /* separator */, Context& context)
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{
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return context;
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}
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};
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template <typename T, typename Separator, typename Context>
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auto interpret_list(const T& t, const Separator& separator, Context& context)
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-> decltype(serializable_list_interpreter_t<Context, T>::_(t, separator, context))
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{
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return serializable_list_interpreter_t<Context, T>::_(t, separator, context);
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}
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}
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#endif
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