mirror of
https://github.com/rbock/sqlpp11.git
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255 lines
7.8 KiB
C++
255 lines
7.8 KiB
C++
/*
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* Copyright (c) 2013-2014, 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_EXPRESSION_H
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#define SQLPP_EXPRESSION_H
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#include <sqlpp11/alias.h>
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#include <sqlpp11/boolean.h>
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#include <sqlpp11/tvin.h>
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#include <sqlpp11/rhs_is_null.h>
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#include <sqlpp11/rhs_is_trivial.h>
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#include <sqlpp11/noop.h>
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#include <sqlpp11/expression_fwd.h>
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#include <sqlpp11/serializer.h>
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#include <sqlpp11/wrap_operand.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 binary_expression_t<Lhs, op::equal_to, Rhs>: public ::sqlpp::boolean::template expression_operators<binary_expression_t<Lhs, op::equal_to, Rhs>>,
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public alias_operators<binary_expression_t<Lhs, op::equal_to, Rhs>>
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{
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using _traits = make_traits<boolean, sqlpp::tag::is_expression>;
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using _recursive_traits = make_recursive_traits<Lhs, Rhs>;
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using _lhs_t = Lhs;
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using _rhs_t = allow_tvin_t<Rhs>;
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binary_expression_t(_lhs_t lhs, _rhs_t rhs):
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_lhs(lhs),
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_rhs(rhs)
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{}
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binary_expression_t(const binary_expression_t&) = default;
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binary_expression_t(binary_expression_t&&) = default;
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binary_expression_t& operator=(const binary_expression_t&) = default;
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binary_expression_t& operator=(binary_expression_t&&) = default;
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~binary_expression_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, equal_to_t<Lhs, Rhs>>
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{
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using T = equal_to_t<Lhs, Rhs>;
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static Context& _(const T& t, Context& context)
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{
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context << "(";
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serialize(t._lhs, context);
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if ((trivial_value_is_null_t<typename T::_lhs_t>::value and rhs_is_trivial(t))
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or rhs_is_null(t))
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{
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context << " IS NULL";
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}
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else
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{
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context << "=";
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serialize(t._rhs, context);
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}
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context << ")";
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return context;
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}
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};
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template<typename Lhs, typename Rhs>
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struct binary_expression_t<Lhs, op::not_equal_to, Rhs>: public ::sqlpp::boolean::template expression_operators<binary_expression_t<Lhs, op::not_equal_to, Rhs>>,
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public alias_operators<binary_expression_t<Lhs, op::not_equal_to, Rhs>>
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{
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using _traits = make_traits<boolean, sqlpp::tag::is_expression>;
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using _recursive_traits = make_recursive_traits<Lhs, Rhs>;
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using _lhs_t = Lhs;
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using _rhs_t = allow_tvin_t<Rhs>;
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binary_expression_t(Lhs lhs, _rhs_t rhs):
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_lhs(lhs),
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_rhs(rhs)
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{}
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binary_expression_t(const binary_expression_t&) = default;
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binary_expression_t(binary_expression_t&&) = default;
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binary_expression_t& operator=(const binary_expression_t&) = default;
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binary_expression_t& operator=(binary_expression_t&&) = default;
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~binary_expression_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, not_equal_to_t<Lhs, Rhs>>
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{
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using T = not_equal_to_t<Lhs, Rhs>;
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static Context& _(const T& t, Context& context)
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{
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context << "(";
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serialize(t._lhs, context);
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if ((trivial_value_is_null_t<typename T::_lhs_t>::value and rhs_is_trivial(t))
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or rhs_is_null(t))
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{
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context << " IS NOT NULL";
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}
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else
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{
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context << "!=";
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serialize(t._rhs, context);
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}
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context << ")";
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return context;
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}
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};
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template<typename Rhs>
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struct unary_expression_t<op::logical_not, Rhs>: public ::sqlpp::boolean::template expression_operators<unary_expression_t<op::logical_not, Rhs>>,
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public alias_operators<unary_expression_t<op::logical_not, Rhs>>
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{
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using _traits = make_traits<boolean, sqlpp::tag::is_expression>;
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using _recursive_traits = make_recursive_traits<Rhs>;
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unary_expression_t(Rhs rhs):
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_rhs(rhs)
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{}
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unary_expression_t(const unary_expression_t&) = default;
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unary_expression_t(unary_expression_t&&) = default;
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unary_expression_t& operator=(const unary_expression_t&) = default;
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unary_expression_t& operator=(unary_expression_t&&) = default;
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~unary_expression_t() = default;
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Rhs _rhs;
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};
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template<typename Context, typename Rhs>
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struct serializer_t<Context, logical_not_t<Rhs>>
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{
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using T = logical_not_t<Rhs>;
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static Context& _(const T& t, Context& context)
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{
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context << "(";
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if (trivial_value_is_null_t<Rhs>::value)
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{
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serialize(t._lhs, context);
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context << " IS NULL ";
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}
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else
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{
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context << "NOT ";
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serialize(t._rhs, context);
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}
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context << ")";
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}
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};
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template<typename Lhs, typename O, typename Rhs>
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struct binary_expression_t: public value_type_of<O>::template expression_operators<binary_expression_t<Lhs, O, Rhs>>,
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public alias_operators<binary_expression_t<Lhs, O, Rhs>>
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{
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using _traits = make_traits<value_type_of<O>, sqlpp::tag::is_expression>;
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using _recursive_traits = make_recursive_traits<Lhs, Rhs>;
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binary_expression_t(Lhs lhs, Rhs rhs):
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_lhs(lhs),
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_rhs(rhs)
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{}
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binary_expression_t(const binary_expression_t&) = default;
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binary_expression_t(binary_expression_t&&) = default;
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binary_expression_t& operator=(const binary_expression_t&) = default;
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binary_expression_t& operator=(binary_expression_t&&) = default;
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~binary_expression_t() = default;
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Lhs _lhs;
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Rhs _rhs;
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};
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template<typename Context, typename Lhs, typename O, typename Rhs>
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struct serializer_t<Context, binary_expression_t<Lhs, O, Rhs>>
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{
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using T = binary_expression_t<Lhs, O, Rhs>;
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static Context& _(const T& t, Context& context)
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{
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context << "(";
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serialize(t._lhs, context);
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context << O::_name;
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serialize(t._rhs, context);
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context << ")";
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return context;
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}
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};
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template<typename O, typename Rhs>
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struct unary_expression_t: public value_type_of<O>::template expression_operators<unary_expression_t<O, Rhs>>,
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public alias_operators<unary_expression_t<O, Rhs>>
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{
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using _traits = make_traits<value_type_of<O>, sqlpp::tag::is_expression>;
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using _recursive_traits = make_recursive_traits<Rhs>;
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unary_expression_t(Rhs rhs):
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_rhs(rhs)
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{}
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unary_expression_t(const unary_expression_t&) = default;
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unary_expression_t(unary_expression_t&&) = default;
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unary_expression_t& operator=(const unary_expression_t&) = default;
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unary_expression_t& operator=(unary_expression_t&&) = default;
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~unary_expression_t() = default;
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Rhs _rhs;
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};
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template<typename Context, typename O, typename Rhs>
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struct serializer_t<Context, unary_expression_t<O, Rhs>>
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{
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using T = unary_expression_t<O, Rhs>;
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static Context& _(const T& t, Context& context)
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{
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context << "(";
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context << O::_name;
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serialize(t._rhs, context);
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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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