Bitfield Class

#include <iostream>

using namespace std;

template<int nbits>
class BitField
{
    static constexpr unsigned int size = (nbits + 7)/8;
    unsigned char data[ size ];

    struct setter
    {
        BitField & bf;
        int i;

        setter(BitField & bf, int i):bf(bf),i(i){}

        setter operator<<(bool bit)
        {
            bf.setBit(i, bit);
            setter bs(bf, i+1);
            return bs;
        }
    };

public:
    static const int bits = nbits;

    BitField():data{0} {
        cout << size << endl;
    }

    void setBit(int i, bool value)
    {
        const int p1 = i/8;
        const int p2 = i%8;
        // clear
        data[p1] &= ~(1 << p2);
        // set
        data[p1] |= value << p2;
    }
    bool bit(int i) const
    {
        return data[i/8] & (1 << (i%8));
    }

    setter operator<<(bool bit)
    {
        setter bs(*this, 0);
        return bs << bit;
    }
    setter set(int i)
    {
        setter bs(*this, i);
        return bs;
    }
};

int main()
{
    BitField<8> a, b;

    a << 1 << 0 << 1 << 0 << 1 << 1 << 0 << 0;
    a.set(4) << 0 << 1 << 0 << 1;

    for(int i=0; i<a.bits; ++i)
    {
        cout << a.bit(i) << " ";
    }
    return 0;
}