builtins/integer_bits/operations_parens.rb

tests/_examples/builtins/integer_bits/operations_parens.rb in the metorex repository.

# Integer bit operations: shifts, complement, and bit_length.

shifts = [1 << 3, 1 << 35, 8 >> 2, -8 >> 2]
puts(shifts.inspect)

# A negative count shifts the other way.
reversed = [5 << -1, 5 >> -1]
puts(reversed.inspect)

# A count past the width leaves 0, or the sign bit on a right shift.
saturated = [1 << 200, -1 >> 200, 1 >> 200]
puts(saturated.inspect)

negative_one = -1
complements = [~5, ~0, ~negative_one]
puts(complements.inspect)

lengths = [255.bit_length, 256.bit_length, 0.bit_length, negative_one.bit_length]
puts(lengths.inspect)

masks = [1 & 3, 1 | 2, 1 ^ 3]
puts(masks.inspect)

round_trip = (1 << 35) * 42 / (1 << 35)
puts(round_trip.to_s)
puts(42.equal?(round_trip).to_s)

Output:

[8, 34359738368, 2, -2]
[2, 10]
[1606938044258990275541962092341162602522202993782792835301376, -1, 0]
[-6, -1, 0]
[8, 9, 0, 0]
[1, 3, 2]
42
true