EL1
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].
