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83 lines
2.9 KiB
C++
83 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_ASSIGNMENT_H
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#define SQLPP_ASSIGNMENT_H
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#include <sqlpp11/default_value.h>
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#include <sqlpp11/null.h>
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#include <sqlpp11/tvin.h>
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#include <sqlpp11/rhs_wrap.h>
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#include <sqlpp11/serialize.h>
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#include <sqlpp11/serializer.h>
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#include <sqlpp11/simple_column.h>
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namespace sqlpp
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{
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template <typename Lhs, typename Rhs>
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struct assignment_t
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{
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using _traits = make_traits<no_value_t, tag::is_assignment>;
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using _lhs_t = Lhs;
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using _rhs_t = rhs_wrap_t<allow_tvin_t<Rhs>, trivial_value_is_null_t<_lhs_t>::value>;
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using _nodes = detail::type_vector<_lhs_t, _rhs_t>;
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static_assert(can_be_null_t<_lhs_t>::value ? true
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: not(std::is_same<_rhs_t, null_t>::value or is_tvin_t<_rhs_t>::value),
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"column must not be null");
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assignment_t(_lhs_t lhs, _rhs_t rhs) : _lhs(lhs), _rhs(rhs)
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{
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}
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assignment_t(const assignment_t&) = default;
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assignment_t(assignment_t&&) = default;
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assignment_t& operator=(const assignment_t&) = default;
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assignment_t& operator=(assignment_t&&) = default;
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~assignment_t() = default;
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_lhs_t _lhs;
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_rhs_t _rhs;
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};
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template <typename Context, typename Lhs, typename Rhs>
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struct serializer_t<Context, assignment_t<Lhs, Rhs>>
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{
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using T = assignment_t<Lhs, Rhs>;
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using _serialize_check = serialize_check_of<Context, typename T::_lhs_t, typename T::_rhs_t>;
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static Context& _(const T& t, Context& context)
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{
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serialize(simple_column(t._lhs), context);
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context << "=";
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serialize_operand(t._rhs, context);
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return context;
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}
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};
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}
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#endif
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