Flex Scanner
[BISON](https://texonom.com/bison-b32877a104514154a5712f4a659846a0) 


## Lexical Analyzer
토큰으로 잘개 쪼개는 부분을 어휘 분석기
스캐너를 생성하는 도구인 LEX





> [FLEX Tutorial](http://alumni.cs.ucr.edu/~lgao/teaching/flex.html)

> [Flex - a scanner generator](https://ftp.gnu.org/old-gnu/Manuals/flex-2.5.4/html_mono/flex.html)

> [flex & bison](https://www.oreilly.com/library/view/flex-bison/9780596805418/ch01.html)





