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74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
#pragma once
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/*
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* Copyright (c) 2013-2015, Roland Bock
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* Copyright (c) 2017, Juan Dent
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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/serialize.h>
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#include <sqlpp11/type_traits.h>
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namespace sqlpp
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{
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template <typename Expr>
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struct trim_t
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{
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using _traits = make_traits<text, tag::is_expression, tag::is_selectable>;
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using _nodes = detail::type_vector<Expr>;
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trim_t(const Expr expr) : _expr(expr)
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{
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}
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trim_t(const trim_t&) = default;
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trim_t(trim_t&&) = default;
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trim_t& operator=(const trim_t&) = default;
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trim_t& operator=(trim_t&&) = default;
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~trim_t() = default;
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Expr _expr;
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};
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template <typename Context, typename Expr>
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Context& serialize(const trim_t<Expr>& t, Context& context)
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{
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context << "TRIM(";
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serialize_operand(t._expr, context);
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context << ")";
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return context;
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}
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template<typename T>
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using check_trim_args = std::enable_if_t<is_text<T>::value>;
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template <typename T, typename = check_trim_args<T>>
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auto trim(T t) -> trim_t<T>
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{
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return {std::move(t)};
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}
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} // namespace sqlpp
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