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The platform specific type for a process identifier.

This is always an integral type. Width and signedness are platform specific.

Since: process-1.6.3.0

Type class for values that can be viewed as a Pid.

>>> view viewPid (CPid 42)
42

Type class for values with a lens into a Pid.

>>> view pid (CPid 42)
42

Type class for values that can be constructed from a Pid.

>>> review reviewPid (CPid 42) :: Pid
42

Type class for values with a prism into a Pid.

>>> preview _Pid (CPid 42)
Just 42