'a to represent lists of elements of
'a while supporting constant time append operations.
t represents a match statement where every case is documented.
Core.Exn.
Core.Core_filename.
Core.Float.
Core.Gc.
Core.Core_int63
Core.Core_int64
Core.Core_list.
Core.Memo
Core.Core_String.
find.
with_conn opens a connection to the TCP service on host port and
if successful calls f with In_channel.t and Out_channel.t as arguments.
The return value of f will be returned by with_conn.
'state t keeps track of updates of type 'state -> 'state queued to it and runs
them sequentially.