Consumes and discards all data received at its input.

sieve(din, *, key) → din[key]

Outputs a slice of the din input interface. The sieve() gear is automatically instantiated when an index operator [] is used on an interfaces. The key parameter can be both a single key or a sequence of keys. Which keys are exactly supported depends on the type of the din input interface, so checkout the __getitem__ method of the specific type. For an example of Uint[8] interface

din = Intf(Uint[8])

we could slice it using Python index operator to obtain a high nibble:

>>> din[4:]

which outputs an interface of the type Uint[4]. The same would be achieved if the sieve gear were instantiated explicitly:

>>> sieve(din, key=slice(4, None, None))