parsing system designed design multiple programming languages EBNF ast tree tac rtl rc

 https://www.webpages.uidaho.edu/~jory/babel.html

https://ebin.pub/design-and-implementation-of-compiler-9788122428650.html

http://ckw.phys.ncku.edu.tw/public/pub/Notes/Computers/Lectures/Old/Programming/The%20Language%20List%20-%20Version%202_4,%20January%2023,%201995.htm

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