You didn't code it, you stole it from open source OS and compiler maintainers
"before Bison version 1.24, Bison-generated parsers could be used only in programs that were free software."
https://www.gnu.org/software/bison/manual/html_node/Conditio...
"before Bison version 1.24, Bison-generated parsers could be used only in programs that were free software."
https://www.gnu.org/software/bison/manual/html_node/Conditio...