core :: Int :: is_pow2
self
assert not 3.is_pow2 assert 2.is_pow2 assert 1.is_pow2 assert not 0.is_pow2
# Is `self` a power of two ? # # ~~~nit # assert not 3.is_pow2 # assert 2.is_pow2 # assert 1.is_pow2 # assert not 0.is_pow2 # ~~~ fun is_pow2: Bool do return self != 0 and (self & self - 1) == 0