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== `sqlite/row.hpp`
This type represents one row of data from a query. Is a random-access range.
WARNING: This type is a pure view type, and will be invalidated when the next row is read.
[source,cpp]
----
struct row
{
// The size of the row, i.e. number of colums
std::size_t size() const;
// Returns the field at `idx`, @throws std::out_of_range
field at(std::size_t idx) const;
// Returns the field at `idx`.
field operator[](std::size_t idx) const;
// Random access iterator used to iterate over the columns.
struct const_iterator
{
using difference_type = int;
using reference = field&;
using iterator_category = std::random_access_iterator_tag;
const_iterator & operator++();
const_iterator operator++(int);
const_iterator & operator--();
const_iterator operator--(int);
field operator[](int i) const;
const_iterator operator+(int i) const;
const_iterator operator-(int i) const;
const_iterator & operator+=(int i);
const_iterator & operator-=(int i);
const field & operator*() const;
const field * operator->() const;
bool operator==(const const_iterator& other) const;
bool operator!=(const const_iterator& other) const;
bool operator<(const const_iterator& other) const;
bool operator>(const const_iterator& other) const;
const_iterator() = default;
};
// Returns the begin of the column-range.
const_iterator begin() const;
// Returns the end of the column-range.
const_iterator end() const
};
----
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