Specs

bsl(prefix(), integer()) :: prefix()

Performs an arithmetic shift left of the bits in pfx by n positions.

A positive n shifts to the left, negative n shifts to the right. The length of the bits stays the same.

Examples

iex> bsl("1.2.3.4", 1)
"2.4.6.8"

iex> bsl("1.2.0.0/16", 2)
"4.8.0.0/16"

iex> bsl({1, 2, 3, 4}, 2)
{4, 8, 12, 16}

# note: the `bits` <<1, 2>> get shifted left 2 bits
iex> bsl({{1, 2, 0, 0}, 16}, 2)
{{4, 8, 0, 0}, 16}

iex> bsl(%Pfx{bits: <<1, 2>>, maxlen: 32}, 2)
%Pfx{bits: <<4, 8>>, maxlen: 32}

iex> bsl(%Pfx{bits: <<1, 2>>, maxlen: 32}, -2)
%Pfx{bits: <<0, 64>>, maxlen: 32}