參考資料:
https://stackoverflow.com/questions/32266199/flex-input-rules-are-too-complicated-32000-nfa-states-while-compiling-hla
問題:
flex -8 -i hla.flx flex: input rules are too complicated (>= 32000 NFA states) make: *** [makefile:28: lex.yy.o] Error 1
解法(加上-Ca):
flex -Ca -8 -i hla.flx