get package:protolude
Return the state from the internals of the monad.
Computation
getArgs returns a list of the program's command
line arguments (not including the program name).
Extract a list of call-sites from the
CallStack.
The list is ordered by most recent call.
Read all user input on
stdin as a single string.
Selector function to extract the field from the record.
Read a single line of user input from
stdin.
Returns the number of Haskell threads that can run truly
simultaneously (on separate physical processors) at any given time. To
change this value, use
setNumCapabilities.
Get a trace of the current execution stack state.
Returns Nothing if stack trace support isn't available on
host machine.
Gets specific component of the state, using a projection function
supplied.