This is the sample implementation of SRFI 189: Maybe and Either.
This library should be portable to any R7RS Scheme. The following SRFIs are used, as well:
To run the provided tests, evaluate the following in a Scheme REPL running in the source directory:
(load "189.sld") (load "test.scm") (check-all)
Wolfgang Corcoran-Mathe email@example.com