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59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
#pragma once
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/*
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* Copyright (c) 2013-2015, 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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#include <sqlpp11/vendor/concat.h>
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#include <sqlpp11/vendor/insert_list.h>
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/*
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* sqlpp11 offers an interpreter that can be used to serialize the expression tree
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* into a standard SQL string.
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*
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* The connector library can specialize the interpreter template to partially or
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* completely change the way the expression tree is interpreted.
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*
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* For example, this specialization will produce indexed parameters instead of just '?'
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*/
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namespace sqlpp
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{
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namespace vendor
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{
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template <typename ValueType, typename NameType>
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struct interpreter_t<database::context_t, parameter_t<ValueType, NameType>>
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{
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using T = parameter_t<ValueType, NameType>;
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static database::context_t& _(const T& t, database::context_t& context)
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{
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context << "?" << context.count();
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context.pop_count();
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return context;
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}
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};
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}
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}
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