Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Returns the number of elements each row in the collection has.
std::size_t num_columns() const;
For every row_view object r obtained from
this collection, r.size() == this->num_columns().
No-throw guarantee.
Constant.