`bit::matrix` — Check on Set Bits

Checks whether all, any, or none of the elements in a bit-matrix are set (i.e. 1).

1constexpr bool all() const;
2constexpr bool any() const;
3constexpr bool none() const;

1: Return true if all the elements in the bit-matrix are 1; otherwise, false.
2: Return true if any elements in the bit-matrix are 1; otherwise, false.
3: Return true if none of the elements in the bit-matrix are 1; otherwise, false.

Calling these methods for an empty bit-matrix is likely an error — if you set the BIT_VERIFY flag at compile time, we throw an exception with a helpful message. If the BIT_VERIFY flag is not set, all() and none() both return true while any() will return false.

Example

#include <bit/bit.h>
int main()
{
    bit::matrix<> m1("000 000 000");
    bit::matrix<> m2("010 101 010");
    bit::matrix<> m3("111 111 111");

    std::cout
        << "matrix\t\t" << "all\t" << "any\t" << "none\n"
        << m1 << "\t\t" << m1.all() << '\t' << m1.any() << '\t' << m1.none() << "\n\n"
        << m2 << "\t\t" << m2.all() << '\t' << m2.any() << '\t' << m2.none() << "\n\n"
        << m3 << "\t\t" << m3.all() << '\t' << m3.any() << '\t' << m3.none() << "\n";
}

Output

matrix          all     any     none
│0 0 0│
│0 0 0│
│0 0 0│         0       0       1

│0 1 0│
│1 0 1│
│0 1 0│         0       1       0

│1 1 1│
│1 1 1│
│1 1 1│         1       1       0

See Also