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Language peer sets for EL1: United States↑ United States/1970↑ Designed 1970 ↑ 1970s languages ↑ Third generation↑ High Cold War↑ Genus Grammar and Syntax-oriented ↑ Grammar and Syntax-oriented↑ Language-related↑ Content-reflexive ↑ Grammar and Syntax-oriented/1970↑ Language-related/1970↑ Content-reflexive/1970↑ Grammar and Syntax-oriented/United States↑ Language-related/United States↑ Content-reflexive/United States↑ EL1(ID:640/el:001)Extensible Languagealternate simple viewCountry: United States Designed 1970 Genus: Grammar and Syntax-oriented Extensible Language One. B. Wegbreit, Harvard ca 1974. An extensible language, 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. One of many experiments to use Algol syntax with S-expressions from Steele "Evolution of Lisp" The EL1 language was designed by Ben Wegbreit as part of his Ph.D. research [Wegbreit, 1970]. It may be loosely characterized as a Lisp with an Algol like surface syntax and strong data typing. A complete programming system called ECL was built around EL1 at Harvard in the early 1970 s [Wegbreit, 1971; Wegbreit, 1972; Wegbreit, 1974] The UNION function in EL1 looks like this: union ..." from Shutt "Recursive Adaptible Grammars" "Wegbreit s ECFGs In the late 1960s, Ben Wegbreit developed an adaptable grammar formalism, as part of an extensible programming language called EL1. Extensible languages will be mentioned in x3.4. He called his grammars ECFGs (Extensible Context Free Grammars) The basic reference is [Wegb 70] An ECFG G consists of a context free grammar together with a deterministic finite state transducer (see x1.4.2) The input alphabet of the transducer is TG ; the output alphabet is ZG , plus some reserved symbols that are used for the unambiguous expression of rules. The output of the .... Places Related languages
References: in [ACM] (1974) [ACM] CACM 17(05) (May 1974) in (1974) The Computer Journal 17(1) February 1974 in (1974) The Computer Journal 17(1) February 1974 in (1976) ACM Computing Reviews 17(02) March 1976 in (1976) ACM Computing Reviews 17(02) March 1976 in [SIGPLAN] (1978) SIGPLAN Notices 13(11) Nov 1978 in [SIGPLAN] (1978) SIGPLAN Notices 13(11) Nov 1978 in [HOPL II] (1993) [ACM SIGPLAN] SIGPLAN Notices 28(03) March 1993 The second ACM SIGPLAN conference on History of programming languages (HOPL II) Search in: Google Google scholar World Cat Yahoo Overture DBLP Monash bib NZ IEEE  ACM portal CiteSeer CSB ncstrl jstor Bookfinder |