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120 lines
3.8 KiB
C++
120 lines
3.8 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_INSERT_VALUE_H
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#define SQLPP_INSERT_VALUE_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/type_traits.h>
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#include <sqlpp11/serializer.h>
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#include <sqlpp11/detail/type_set.h>
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namespace sqlpp
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{
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namespace detail
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{
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template <typename Type, bool>
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struct type_if
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{
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using type = Type;
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};
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template <typename Type>
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struct type_if<Type, false>
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{
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struct type
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{
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using _traits = make_traits<no_value_t, tag::is_noop>;
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using _nodes = detail::type_vector<>;
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};
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};
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}
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template <typename Column>
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struct insert_value_t
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{
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using _is_insert_value = std::true_type;
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using _column_t = Column;
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static constexpr bool _trivial_value_is_null = trivial_value_is_null_t<Column>::value;
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using _pure_value_t = typename value_type_of<Column>::_cpp_value_type;
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using _wrapped_value_t = wrap_operand_t<_pure_value_t>;
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using _tvin_t = tvin_t<_wrapped_value_t>;
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insert_value_t(rhs_wrap_t<_wrapped_value_t, _trivial_value_is_null> rhs)
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: _is_null(rhs._is_null()), _is_default(rhs._is_default()), _value(rhs._expr._t)
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{
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}
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insert_value_t(rhs_wrap_t<_tvin_t, _trivial_value_is_null> rhs)
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: _is_null(rhs._is_null()), _is_default(rhs._is_default()), _value(rhs._expr._value)
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{
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}
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insert_value_t(const rhs_wrap_t<null_t, _trivial_value_is_null>&) : _is_null(true), _is_default(false), _value{}
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{
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}
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insert_value_t(const rhs_wrap_t<default_value_t, _trivial_value_is_null>&)
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: _is_null(false), _is_default(true), _value{}
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{
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}
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insert_value_t(const insert_value_t&) = default;
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insert_value_t(insert_value_t&&) = default;
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insert_value_t& operator=(const insert_value_t&) = default;
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insert_value_t& operator=(insert_value_t&&) = default;
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~insert_value_t() = default;
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bool _is_null;
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bool _is_default;
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_wrapped_value_t _value;
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};
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template <typename Context, typename ValueType>
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struct serializer_t<Context, insert_value_t<ValueType>>
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{
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using _serialize_check = serialize_check_of<Context, ValueType>;
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using T = insert_value_t<ValueType>;
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static Context& _(const T& t, Context& context)
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{
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if ((trivial_value_is_null_t<typename T::_column_t>::value and t._value._is_trivial()) or t._is_null)
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{
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context << "NULL";
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}
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else if (t._is_default)
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context << "DEFAULT";
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else
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serialize_operand(t._value, 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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