StduneSourceAppendable lists: concatenation takes O(1) time, conversion to a list takes O(n).
An exception together with the backtrace that raised it.
Hashtable with a simple polymorphic type, but without the polymorphic equality.
A programming error that should be reported upstream
Error meant for humans
A message for the user
Non-fatal user errors
Safe version of Scanf from the stdlib. Does not raise parsing errors errors.
Subset of https://github.com/janestreet/spawn/blob/master/src/spawn.mli