module Unique_id_intf: sig .. end
Signature for use by module : Unique_id.
Signature for use by module : Unique_id.
module type Id = sig .. end
Signature for use by module : Unique_id.
The sexps and strings look like integers.
CAVEAT: Values created with of_float, of_sexp, or of_string may be equal to
previously created values.
Always returns a value that is not equal to any other value created with
create.