mirror of
https://github.com/rbock/sqlpp11.git
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138 lines
5.4 KiB
C++
138 lines
5.4 KiB
C++
/*
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* Copyright (c) 2013, 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_BASIC_OPERATORS_H
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#define SQLPP_DETAIL_BASIC_OPERATORS_H
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#include <sqlpp11/alias.h>
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#include <sqlpp11/sort_order.h>
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#include <sqlpp11/vendor/expression_fwd.h>
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#include <sqlpp11/vendor/in_fwd.h>
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#include <sqlpp11/vendor/is_null_fwd.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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struct boolean;
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}
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// basic operators
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template<typename Base, template<typename> class Constraint>
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struct basic_operators
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{
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template<typename T>
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vendor::equal_t<Base, typename Constraint<T>::type> operator==(T&& t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used as left hand side operand");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)} };
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}
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template<typename T>
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vendor::not_equal_t<Base, typename Constraint<T>::type> operator!=(T&& t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used as left hand side operand");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)} };
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}
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template<typename T>
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vendor::less_than_t<Base, typename Constraint<T>::type> operator<(T&& t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used as left hand side operand");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)} };
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}
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template<typename T>
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vendor::less_equal_t<Base, typename Constraint<T>::type> operator<=(T&& t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used as left hand side operand");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)} };
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}
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template<typename T>
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vendor::greater_than_t<Base, typename Constraint<T>::type> operator>(T&& t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used as left hand side operand");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)} };
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}
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template<typename T>
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vendor::greater_equal_t<Base, typename Constraint<T>::type> operator>=(T&& t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used as left hand side operand");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)} };
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}
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vendor::is_null_t<true, Base> is_null() const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used with is_null()");
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return { *static_cast<const Base*>(this) };
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}
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vendor::is_null_t<false, Base> is_not_null() const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used with is_not_null()");
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return { *static_cast<const Base*>(this) };
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}
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sort_order_t<Base, sort_type::asc> asc()
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used for sorting");
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return { *static_cast<const Base*>(this) };
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}
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sort_order_t<Base, sort_type::desc> desc()
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used for sorting");
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return { *static_cast<const Base*>(this) };
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}
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// Hint: use value_list wrapper for containers...
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template<typename... T>
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vendor::in_t<true, Base, typename Constraint<T>::type...> in(T&&... t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot be used with in()");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)}... };
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}
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template<typename... T>
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vendor::in_t<false, Base, typename Constraint<T>::type...> not_in(T&&... t) const
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot with be used with not_in()");
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return { *static_cast<const Base*>(this), {std::forward<T>(t)}... };
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}
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template<typename alias_provider>
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expression_alias_t<Base, typename std::decay<alias_provider>::type> as(alias_provider&&)
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{
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static_assert(not is_multi_expression_t<Base>::value, "multi-expression cannot have a name");
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return { *static_cast<const Base*>(this) };
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}
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};
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}
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#endif
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