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Introduced result::front, pop_front and empty() to make it more STL-container-like

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Roland Bock
2013-09-19 08:08:59 +02:00
parent 8189dc6a00
commit 683731517a
1 changed files with 69 additions and 64 deletions
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include/sqlpp11/result.h
+69 -64
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@@ -35,89 +35,94 @@ namespace sqlpp
{
template<typename Db, typename ResultRow>
class result_t
{
using db_result_t = typename Db::_result_t;
db_result_t _result;
raw_result_row_t _raw_result_row;
raw_result_row_t _end;
public:
result_t(db_result_t&& result):
_result(std::forward<db_result_t>(result)),
_raw_result_row(_result.next()),
_end({})
{}
result_t(const result_t&) = delete;
result_t(result_t&&) = default;
result_t& operator=(const result_t&) = delete;
result_t& operator=(result_t&&) = default;
// Iterator
class iterator
{
using db_result_t = typename Db::_result_t;
db_result_t _result;
raw_result_row_t _raw_result_row;
raw_result_row_t _end;
ResultRow _result_row;
public:
iterator(db_result_t& result, raw_result_row_t& raw_result_row):
_result(result),
_raw_result_row(raw_result_row),
result_t(db_result_t&& result):
_result(std::forward<db_result_t>(result)),
_raw_result_row(_result.next()),
_end({}),
_result_row(_raw_result_row)
{}
result_t(const result_t&) = delete;
result_t(result_t&&) = default;
result_t& operator=(const result_t&) = delete;
result_t& operator=(result_t&&) = default;
// Iterator
class iterator
{
std::cerr << "result::iterator::constructor" << std::endl;
public:
iterator(result_t& result, raw_result_row_t& raw_result_row):
_result(result),
_raw_result_row(raw_result_row)
{
//std::cerr << "result::iterator::constructor" << std::endl;
}
const ResultRow& operator*() const
{
return _result.front();
}
const ResultRow* operator->() const
{
return &_result.front();
}
bool operator==(const iterator& rhs) const
{
return _raw_result_row == rhs._raw_result_row;
}
bool operator!=(const iterator& rhs) const
{
return not (operator==(rhs));
}
void operator++()
{
_result.pop_front();
}
result_t& _result;
raw_result_row_t& _raw_result_row;
};
iterator begin()
{
return iterator(*this, _raw_result_row);
}
const ResultRow& operator*() const
iterator end()
{
return iterator(*this, _end);
}
const ResultRow& front() const
{
return _result_row;
}
const ResultRow* operator->() const
bool empty() const
{
return &_result_row;
return _raw_result_row == _end;
}
bool operator==(const iterator& rhs) const
{
return _result == rhs._result and _raw_result_row == rhs._raw_result_row;
}
bool operator!=(const iterator& rhs) const
{
return not (operator==(rhs));
}
void operator++()
void pop_front()
{
_raw_result_row = _result.next();
_result_row = _raw_result_row;
}
db_result_t& _result;
raw_result_row_t& _raw_result_row;
ResultRow _result_row;
};
iterator begin()
{
return iterator(_result, _raw_result_row);
}
iterator end()
{
return iterator(_result, _end);
}
const ResultRow operator*()
{
return {_raw_result_row};
}
iterator operator->()
{
return begin();
}
};
}
#endif