Lexcial Analyzer Generator written in C++. It can generate a simple C99 lexer.
Basic file I/O processor, for processing lex.l and y.tab.h.
Regular expressions with []^-?.*+|()${}%<> are converted to the regular expressions with only ()*|$, where label $ is used as the ending symbol of a regular expression.
This part is written by Jiahuan Song.