reserved = {
        'C': 'C',
        }

tokens = [
        'LPAREN',
        'RPAREN',
        'SEMICOLON',
        'STRING',
        'ID',
        ] + list(reserved.values())

states = (
        ('string', 'exclusive'),
        )

t_LPAREN = r'\('
t_RPAREN = r'\)'
t_SEMICOLON = r';'

t_ignore = ' \t\r'

def t_ID(t):
    r'[a-zA-Z_][a-zA-Z_0-9]*'
    t.type = reserved.get(t.value, 'ID')
    return t

def t_STRING(t):
    r'\"'
    t.lexer.str_buildup = ''
    t.lexer.begin('string')

def t_string_1(t):
    r'[^\\\n\"]'
    t.lexer.str_buildup += t.value

def t_string_2(t):
    r'\\[^\n]'
    c = {
            't': '\t',
            'r': '\r',
            'n': '\n',
            'f': '\f',
            'b': '\b',
            'v': '\v',
        }.get(t.value[1], t.value[1])
    t.lexer.str_buildup += c

def t_string_3(t):
    r'\"'
    t.type = 'STRING'
    t.value = t.lexer.str_buildup
    t.lexer.begin('INITIAL')
    return t

def t_newline(t):
    r'\n+'
    t.lexer.lineno += len(t.value)
    return None

def t_error(t):
    print 'Illegal character "%s"' % t.value[0]
    t.lexer.skip(1)