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
This version of Boost is under active development. You are currently in the master branch. The current version is 1.91.0.
Returns the number of elements each row in the collection has.
std::size_t num_columns() const noexcept;
For every row_view object r obtained from
this collection, r.size() == this->num_columns().
No-throw guarantee.
Constant.