#define PLUS       '+'
#define MINUS      '-'
#define OR         '|'
#define SHIFT_L    '<'
#define SHIFT_R    '>'

#define TIMES      '*'
#define DIVISION   '/'
#define MODULO     '%'
#define AND        '&'
#define XOR        '^'

#define NEGATIVE   '-'
#define BANG       '!'
#define TWIDDLE    '~'

#define NOTHING    '\0'

#define LPAREN     '('
#define RPAREN     ')'

#define EQUAL      '='

#define LESS_THAN    '<'
#define GREATER_THAN '>'

#define SEMI_COLON   ';'
#define COMMA        ','

#define SINGLE_QUOTE '\''

#define USE_LAST_RESULT '.'