LinePair gather_tag(char *line, unsigned char *linep);
LinePair gather_string(char *line, unsigned char *linep);
Boolean is_character_class(unsigned char ch, TokenType character_class);
LinePair gather_tag(char *line, unsigned char *linep);
LinePair gather_string(char *line, unsigned char *linep);
Boolean is_character_class(unsigned char ch, TokenType character_class);