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#include <database/row.hpp>
template <typename... T>
class AsyncResult
{
std::unique_ptr<Statement> statement{};
std::string table_name;
public:
AsyncResult(std::unique_ptr<Statement> s, const std::string& table_name):
statement{std::move(s)},
table_name{table_name}
{}
class iterator
{
using iterator_category = std::input_iterator_tag;
using value_type = Row<T...>;
using difference_type = std::ptrdiff_t;
using pointer = Row<T...>*;
using reference = Row<T...>&;
Row<T...> row{};
Statement* statement;
bool is_end;
public:
iterator(Statement* s, const std::string& table_name, bool end=false):
row{table_name},
statement{s},
is_end{end}
{}
reference operator*()
{
extract_row_values(this->row, *statement);
return this->row;
}
bool operator==(const iterator& o) const
{
if (this->is_end && o.is_end)
return true;
return false;
}
bool operator!=(const iterator& o) const
{
return !(*this == o);
}
iterator& operator++()
{
if (statement->step() != StepResult::Row)
this->is_end = true;
return *this;
}
iterator& operator++(int)
{
iterator old = *this;
if (statement->step() != StepResult::Row)
this->is_end = true;
return old;
}
};
iterator begin() const
{
iterator it{this->statement.get(), this->table_name};
++it;
return it;
}
iterator end() const
{
return {this->statement.get(), this->table_name, true};
}
};
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