auto bitarray = 100.bitRcslice; // allocates 16 bytes total (plus RC context)
assert(bitarray.shape == cast(size_t[1])[100]);
assert(bitarray[72] == false);
bitarray[72] = true;
assert(bitarray[72] == true);

auto bitmatrix = bitRcslice(20, 6); // allocates 16 bytes total (plus RC context)
assert(bitmatrix.shape == cast(size_t[2])[20, 6]);
assert(bitmatrix[3, 4] == false);
bitmatrix[3, 4] = true;
assert(bitmatrix[3, 4] == true);