Extensible Language One. An extensible language by
B. Wegbreit of Harvard ca 1974. EL1 is internally somewhat
Lisp-like, but fully typed with
records and pointers. The
external
syntax is
ALGOL-like and extensible, supporting
user-defined data structures, control structures and
operations. The
parser is table-driven, with a modifiable
set of productions. Used as the basis for the
ECL
operating system.
["Studies in Extensible Programming Languages", B. Wegbreit,
Garland. Pub 1980].