Documentation for method pid assembled from the following pages:
Class: Proc §
From Proc
(Proc) method pid §
method pid()Returns the PID value of the process if available, or Nil.
Class: Proc::Async §
From Proc::Async
(Proc::Async) method pid §
method pid(Proc::Async: --> Promise)Equivalent to ready.
Returns a Promise that will be kept once the process has successfully started. Promise will be broken if the program fails to start. Returned promise will hold the process id (PID).
Implementation-specific note: Available starting from Rakudo 2018.04.