M-expression LISP - definição. O que é M-expression LISP. Significado, conceito
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O que (quem) é M-expression LISP - definição

PROPOSED SYNTAX FOR THE LISP LANGUAGE
Meta-expression; M expressions; M expression
  • John McCarthy

M-expression LISP      
(MLISP) The original "meta-language" syntax of Lisp, designed by John McCarthy in 1962. MLISP was intended for external use in place of the parenthesised S-expression syntax. ["LISP 1.5 Programmer's Manual", J. McCarthy et al, MIT Press 1962]. (1994-11-22)
LISP 1.5         
  • 4.3 BSD]] from the [[University of Wisconsin]], displaying the [[man page]] for [[Franz Lisp]]
  • pointer]] diagram for the list (42 69 613)
  • A [[Lisp machine]] in the [[MIT Museum]]
FUNCTIONAL PROGRAMMING LANGUAGE BASED ON THE LAMBDA CALCULUS
LISP programming language; Lisp computer language; Lisp atom; Lisp language; LISP language; LISP (programming language); LISP atom; Lisp programming language; LISP (programming); Lisp (programming); Programmable programming language; Lisp renaissance; LISP 1.5; Lisp 1.5; Lithp (programming language); Defun; List Processing; LISP; List processing language; Lisp (language); MuLISP; Lots of Irritating Superfluous Parentheses; Lisp operators; History of the Lisp programming language; Lambde expressions in Lisp; Control structures in Lisp; Object systems in Lisp
The second version of Lisp, successor to LISP 1. Developed at MIT in 1959. Followed by LISP 1.75, LISP 1.9, Lisp 2 and many other versions.
S-expression         
DATA SERIALIZATION FORMAT OFTEN USED FOR LISP
S expression; S-expressions; Sexp; S-exp; S expressions; S-Expression; Sexps; Lisp syntax; Sexpr; S-expr
In computer programming, an S-expression (or symbolic expression, abbreviated as sexpr or sexp) is an expression in a like-named notation for nested list (tree-structured) data. S-expressions were invented for and popularized by the programming language Lisp, which uses them for source code as well as data.

Wikipédia

M-expression

In computer programming, M-expressions (or meta-expressions) were an early proposed syntax for the Lisp programming language, inspired by contemporary languages such as Fortran and ALGOL. The notation was never implemented into the language and, as such, it was never finalized.

Compared to S-expressions, M-expressions introduce function notation, infix operators (including a defun operator), and shorthands for cond and list into the language.