def parse_exp(cls):
try:
node = Node(Node.EXP)
node.set_data_type(Token.LOGIC_EXP)
left_node = cls.parse_multi_term_exp()
if cls.get_next_token().get_type() in [Token.GT, Token.GET, Token.LT, Token.LET, Token.EQ, Token.NEQ]:
node.set_left(left_node)
node.set_middle(cls.parse_logic_op())
node.set_right(cls.parse_multi_term_exp())
return node
return left_node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_term_exp(cls):
try:
node = Node(Node.EXP)
node.set_data_type(Token.TERM_EXP)
left_node = cls.parse_factor()
if cls.get_next_token().get_type() in [Token.MUL, Token.DIV]:
node.set_left(left_node)
node.set_middle(cls.parse_mul_div_op())
node.set_right(cls.parse_term_exp())
return node
return left_node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_term_exp(cls):
try:
node = Node(Node.EXP)
node.set_data_type(Token.TERM_EXP)
left_node = cls.parse_factor()
if cls.get_next_token().get_type() in [Token.MUL, Token.DIV]:
node.set_left(left_node)
node.set_middle(cls.parse_mul_div_op())
node.set_right(cls.parse_term_exp())
return node
return left_node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_exp(cls):
try:
node = Node(Node.EXP)
node.set_data_type(Token.LOGIC_EXP)
left_node = cls.parse_multi_term_exp()
if cls.get_next_token().get_type() in [Token.GT, Token.GET, Token.LT, Token.LET, Token.EQ, Token.NEQ]:
node.set_left(left_node)
node.set_middle(cls.parse_logic_op())
node.set_right(cls.parse_multi_term_exp())
return node
return left_node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_if_stmt(cls):
try:
node = Node(Node.IF_STMT)
cls.read_token(Token.IF)
cls.read_token(Token.LPARENT)
node.set_left(cls.parse_exp())
cls.read_token(Token.RPARENT)
node.set_middle(cls.switch_stmt())
if cls.iterator.has_next() and cls.get_next_token().get_type() == Token.ELSE:
cls.read_token(Token.ELSE)
node.set_right(cls.switch_stmt())
return node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_if_stmt(cls):
try:
node = Node(Node.IF_STMT)
cls.read_token(Token.IF)
cls.read_token(Token.LPARENT)
node.set_left(cls.parse_exp())
cls.read_token(Token.RPARENT)
node.set_middle(cls.switch_stmt())
if cls.iterator.has_next() and cls.get_next_token().get_type() == Token.ELSE:
cls.read_token(Token.ELSE)
node.set_right(cls.switch_stmt())
return node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_multi_term_exp(cls):
try:
node = Node(Node.EXP)
node.set_data_type(Token.MULTI_TERM_EXP)
left_node = cls.parse_term_exp()
next_token_type = cls.get_next_token().get_type()
if next_token_type == Token.PLUS:
node.set_left(left_node)
node.set_middle(cls.parse_add_minus_op())
node.set_right(cls.parse_multi_term_exp())
elif next_token_type == Token.MINUS:
node.set_left(left_node)
node.set_middle(Node(Node.OP, m_data_type=Token.PLUS))
node.set_right(cls.parse_multi_term_exp())
else:
return left_node
return node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_multi_term_exp(cls):
try:
node = Node(Node.EXP)
node.set_data_type(Token.MULTI_TERM_EXP)
left_node = cls.parse_term_exp()
next_token_type = cls.get_next_token().get_type()
if next_token_type == Token.PLUS:
node.set_left(left_node)
node.set_middle(cls.parse_add_minus_op())
node.set_right(cls.parse_multi_term_exp())
elif next_token_type == Token.MINUS:
node.set_left(left_node)
node.set_middle(Node(Node.OP, m_data_type=Token.PLUS))
node.set_right(cls.parse_multi_term_exp())
else:
return left_node
return node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content