lex(lextab, package, reflags=64)¶
Create a lexer from local variables.
It automatically compiles the lexer in optimized mode, writing to
lextabin the same directory as the calling file.
This function is thread-safe. The returned lexer is not thread-safe, but if it is used exclusively with a single parser returned by
yacc()then it will be safe.
It is only intended to work with lexers defined within the calling function, rather than at class or module scope.