Pfx.band

You're seeing just the function band, go back to Pfx module for more information.

Specs

band(prefix(), prefix()) :: prefix()

A bitwise AND of two prefix/0's.

Both prefixes should, ultimately, have the same maxlen. If one or more arguments are nog a Pfx-struct they are are converted using Pfx.new/1.

Examples

iex> x = new(<<128, 129, 130, 131>>, 32)
iex> y = new(<<255, 255>>, 32)
iex>
iex> band(x, y)
%Pfx{bits: <<128, 129, 0, 0>>, maxlen: 32}
iex>
iex> band(y,x)
%Pfx{bits: <<128, 129, 0, 0>>, maxlen: 32}

iex> band("1.2.3.4", "255.255.0.0")
"1.2.0.0"

iex> band("1.2.3.4", {255, 255, 0, 0})
"1.2.0.0"

iex> band({1, 2, 3, 4}, "255.255.0.0")
{1, 2, 0, 0}

# both will still have maxlen `32`
iex> band({{1, 2, 3, 4}, 24}, {{255, 255, 0, 0}, 32})
{{1, 2, 0, 0}, 32}

# the work of ancient astrounauts ..
iex> band("1.2.3.4", "255.255")
"1.0.0.4"