mirror of
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129 lines
3.2 KiB
C++
129 lines
3.2 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_RESULT_H
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#define SQLPP_RESULT_H
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#include <sqlpp11/raw_result_row.h>
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#include <iostream>
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namespace sqlpp
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{
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template<typename Db, typename ResultRow>
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class result_t
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{
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using db_result_t = typename Db::_result_t;
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db_result_t _result;
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raw_result_row_t _raw_result_row;
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raw_result_row_t _end;
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ResultRow _result_row;
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public:
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result_t(db_result_t&& result):
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_result(std::forward<db_result_t>(result)),
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_raw_result_row(_result.next()),
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_end({}),
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_result_row(_raw_result_row)
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{}
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result_t(const result_t&) = delete;
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result_t(result_t&&) = default;
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result_t& operator=(const result_t&) = delete;
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result_t& operator=(result_t&&) = default;
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// Iterator
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class iterator
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{
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public:
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iterator(result_t& result, raw_result_row_t& raw_result_row):
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_result(result),
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_raw_result_row(raw_result_row)
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{
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//std::cerr << "result::iterator::constructor" << std::endl;
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}
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const ResultRow& operator*() const
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{
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return _result.front();
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}
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const ResultRow* operator->() const
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{
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return &_result.front();
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}
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bool operator==(const iterator& rhs) const
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{
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return _raw_result_row == rhs._raw_result_row;
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}
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bool operator!=(const iterator& rhs) const
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{
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return not (operator==(rhs));
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}
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void operator++()
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{
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_result.pop_front();
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}
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result_t& _result;
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raw_result_row_t& _raw_result_row;
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};
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iterator begin()
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{
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return iterator(*this, _raw_result_row);
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}
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iterator end()
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{
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return iterator(*this, _end);
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}
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const ResultRow& front() const
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{
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return _result_row;
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}
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bool empty() const
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{
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return _raw_result_row == _end;
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}
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void pop_front()
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{
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_raw_result_row = _result.next();
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_result_row = _raw_result_row;
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}
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};
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}
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#endif
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