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78 lines
3.2 KiB
C++
78 lines
3.2 KiB
C++
#pragma once
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/*
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* Copyright (c) 2013-2020, Roland Bock, MacDue
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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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#include <sqlpp11/data_types/no_value.h>
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#include <sqlpp11/type_traits.h>
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#include <sqlpp11/serialize.h>
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#include <utility>
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namespace sqlpp
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{
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template <typename ValueType, typename Expr>
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struct parameterized_verbatim_t : public expression_operators<verbatim_t<ValueType>, ValueType>,
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public alias_operators<verbatim_t<ValueType>>
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{
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using _traits = make_traits<ValueType, tag::is_expression>;
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using _nodes = detail::type_vector<Expr>;
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using _can_be_null =
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std::true_type; // since we do not know what's going on inside the verbatim, we assume it can be null
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parameterized_verbatim_t(
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const Expr expr, std::string verbatim_lhs, std::string verbatim_rhs)
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: _expr(expr), _verbatim_lhs(std::move(verbatim_lhs)), _verbatim_rhs(std::move(verbatim_rhs)) { }
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parameterized_verbatim_t(const parameterized_verbatim_t&) = default;
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parameterized_verbatim_t(parameterized_verbatim_t&&) = default;
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parameterized_verbatim_t& operator=(const parameterized_verbatim_t&) = default;
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parameterized_verbatim_t& operator=(parameterized_verbatim_t&&) = default;
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~parameterized_verbatim_t() = default;
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Expr _expr;
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std::string _verbatim_lhs, _verbatim_rhs;
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};
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template <typename Context, typename ValueType, typename Expr>
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Context& serialize(const parameterized_verbatim_t<ValueType, Expr>& t, Context& context)
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{
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context << t._verbatim_lhs;
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serialize(t._expr, context);
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context << t._verbatim_rhs;
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return context;
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}
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template <typename ValueType, typename Expr>
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auto parameterized_verbatim(std::string lhs, Expr expr, std::string rhs)
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-> parameterized_verbatim_t<ValueType, wrap_operand_t<Expr>>
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{
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static_assert(is_expression_t<wrap_operand_t<Expr>>::value, "parameterized_verbatim() requires an expression as argument");
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return {expr, lhs, rhs};
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}
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} // namespace sqlpp
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