`bit::matrix` — Clear out a Bit-Matrix

We provide a method to remove all elements from a bit-matrix.

constexpr bit::matrix &clear();

The bit-matrix’s rows(), cols(), and size() all become 0, but the capacity is not changed. This method returns a reference to *this so it can be chained with other calls.

Example

#include <bit/bit.h>
int main()
{
    auto m = bit::matrix<>::random(8ul, 16ul);
    std::cout << "Pre-clear:\n"  << m         << '\n';
    std::cout << "Post-clear:\n" << m.clear() << '\n';
    std::cout << "m.rows(): "    << m.rows()  << '\n';
    std::cout << "m.cols(): "    << m.cols()  << '\n';
    std::cout << "m.size(): "    << m.size()  << '\n';
}

Output

Pre-clear:
│0 1 0 1 0 0 1 0 0 1 0 0 0 1 1 1│
│0 0 1 1 0 0 0 0 1 1 1 0 1 1 1 0│
│0 1 0 1 0 0 0 0 0 0 1 1 0 1 1 0│
│1 0 0 0 1 1 1 0 0 0 1 1 1 1 1 1│
│0 0 0 0 1 0 0 1 0 1 0 1 1 1 1 0│
│1 0 1 1 1 1 0 0 1 0 0 1 1 1 1 1│
│1 1 0 0 0 1 0 0 1 1 1 1 0 1 1 0│
│1 1 0 0 0 0 1 0 1 0 1 1 0 1 1 1│
Post-clear:
[]
m.rows(): 0
m.cols(): 0
m.size(): 0

See Also