What is the X in X-mas?
A lazy function language. A weakly typed, lazy functional language developed by Paul Hudak email@example.com of Yale in 1983. Alfl is implemented as a Scheme preprocessor for the Orbit compiler, by transforming laziness into force-and-delay.
["Alfl Reference Manual and Programmer's Guide", P. Hudak, YALEU/DCS/RR322, Yale U, Oct 1984].
See also ParAlfl.