= L =
lexer /lek'sr/ n.
Common hacker shorthand for `lexical
analyzer', the input-tokenizing stage in the parser for a language
(the part that breaks it into word-like pieces). "Some C lexers
get confused by the old-style compound ops like =-."
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.