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85 lines
3.0 KiB
C++
85 lines
3.0 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_BOOLEAN_EXPRESSION_H
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#define SQLPP_BOOLEAN_EXPRESSION_H
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#include <sqlpp11/type_traits.h>
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#include <sqlpp11/interpretable.h>
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namespace sqlpp
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{
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template<typename Database>
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struct boolean_expression_t: public expression_operators<boolean_expression_t<Database>, boolean>
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{
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using _traits = make_traits<boolean, tag::is_expression>;
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using _recursive_traits = make_recursive_traits<>;
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template<typename Expr>
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boolean_expression_t(Expr expr):
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_expr(expr)
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{
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static_assert(is_expression_t<Expr>::value, "boolean_expression requires a boolean expression argument");
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static_assert(is_boolean_t<Expr>::value, "boolean_expression requires a boolean expression argument");
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}
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boolean_expression_t(const boolean_expression_t&) = default;
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boolean_expression_t(boolean_expression_t&&) = default;
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boolean_expression_t& operator=(const boolean_expression_t&) = default;
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boolean_expression_t& operator=(boolean_expression_t&&) = default;
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~boolean_expression_t() = default;
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interpretable_t<Database> _expr;
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};
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template<typename Database, typename T>
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boolean_expression_t<Database> boolean_expression(T t)
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{
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using Expr = wrap_operand_t<T>;
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return {Expr{t}};
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}
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template<typename Database, typename T>
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boolean_expression_t<Database> boolean_expression(const Database&, T t)
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{
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return boolean_expression<Database>(t);
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}
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template<typename Context, typename Database>
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struct serializer_t<Context, boolean_expression_t<Database>>
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{
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using T = boolean_expression_t<Database>;
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static Context& _(const T& t, Context& context)
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{
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return serialize(t._expr, context);
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}
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};
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}
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#endif
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