2004/05/29 Lex and Yacc
© May 2004 Tony Lawrence
Although separate programs, you'll often see the two tied together. From the Bugs section of the Lex Man Page:
The asteroid to kill this dinosaur is still in orbit.
Lex is "A Lexical Analyzer Generator". It recognizes regular expressions, and generates simple output based on what it is fed. Yacc (Yet Another Compiler Compiler) depends upon that type of lexical parsing to produce a C program that will interpret the input. See https://www.tldp.org/HOWTO/Lex-YACC-HOWTO.html
The Linux version of Lex is Flex and Bison has a yacc compatibility flag.
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