def parse_declare_stmt(cls):
try:
node = Node(Node.DECLARE_STMT)
var_node = Node(Node.VAR)
if cls.get_next_token().get_type() in [Token.INT, Token.DOUBLE]:
current_token = cls.iterator.next()
data_type = Token.INT if current_token.get_type() == Token.INT else Token.DOUBLE
var_node.set_data_type(data_type)
else:
next_token = cls.get_next_token()
raise ErrorParse(next_token.get_line_num(), next_token.get_type())
if cls.get_next_token().get_type() == Token.ID:
current_token = cls.iterator.next()
var_node.set_value(current_token.get_value())
else:
next_token = cls.get_next_token()
raise ErrorParse(next_token.get_line_num(), next_token.get_type())
if cls.get_next_token().get_type() == Token.ASSIGN:
cls.read_token(Token.ASSIGN)
node.set_middle(cls.parse_exp())
elif cls.get_next_token().get_type() == Token.LBRACKET:
cls.read_token(Token.LBRACKET)
var_node.set_left(cls.parse_exp())
cls.read_token(Token.RBRACKET)
cls.read_token(Token.SEMI)
node.set_left(var_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_declare_stmt(cls):
try:
node = Node(Node.DECLARE_STMT)
var_node = Node(Node.VAR)
if cls.get_next_token().get_type() in [Token.INT, Token.DOUBLE]:
current_token = cls.iterator.next()
data_type = Token.INT if current_token.get_type() == Token.INT else Token.DOUBLE
var_node.set_data_type(data_type)
else:
next_token = cls.get_next_token()
raise ErrorParse(next_token.get_line_num(), next_token.get_type())
if cls.get_next_token().get_type() == Token.ID:
current_token = cls.iterator.next()
var_node.set_value(current_token.get_value())
else:
next_token = cls.get_next_token()
raise ErrorParse(next_token.get_line_num(), next_token.get_type())
if cls.get_next_token().get_type() == Token.ASSIGN:
cls.read_token(Token.ASSIGN)
node.set_middle(cls.parse_exp())
elif cls.get_next_token().get_type() == Token.LBRACKET:
cls.read_token(Token.LBRACKET)
var_node.set_left(cls.parse_exp())
cls.read_token(Token.RBRACKET)
cls.read_token(Token.SEMI)
node.set_left(var_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_assign_stmt(cls):
try:
node = Node(Node.ASSIGN_STMT)
node.set_left(cls.identifier())
cls.read_token(Token.ASSIGN)
node.set_middle(cls.parse_exp())
cls.read_token(Token.SEMI)
return node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_assign_stmt(cls):
try:
node = Node(Node.ASSIGN_STMT)
node.set_left(cls.identifier())
cls.read_token(Token.ASSIGN)
node.set_middle(cls.parse_exp())
cls.read_token(Token.SEMI)
return node
except ErrorParse(cls.get_next_token().get_line_num(), cls.get_next_token().get_type()) as e:
print e.content
def parse_while_stmt(cls):
try:
node = Node(Node.WHILE_STMT)
cls.read_token(Token.WHILE)
cls.read_token(Token.LPARENT)
node.set_left(cls.parse_exp())
cls.read_token(Token.RPARENT)
node.set_middle(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_while_stmt(cls):
try:
node = Node(Node.WHILE_STMT)
cls.read_token(Token.WHILE)
cls.read_token(Token.LPARENT)
node.set_left(cls.parse_exp())
cls.read_token(Token.RPARENT)
node.set_middle(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_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_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
def parse_factor(cls):
try:
if cls.iterator.has_next():
node = Node(Node.FACTOR)
next_token_type = cls.get_next_token().get_type()
if next_token_type in [Token.LITERAL_INT, Token.LITERAL_DOU]:
node.set_left(cls.parse_literal())
elif next_token_type == Token.LPARENT:
cls.read_token(Token.LBRACKET)
node.set_middle(cls.parse_exp())
cls.read_token(Token.RPARENT)
elif next_token_type == Token.MINUS:
node.set_data_type(Token.MINUS)
cls.currentToken = cls.iterator.next()
node.set_left(cls.parse_term_exp())
elif next_token_type == Token.PLUS:
cls.currentToken == cls.iterator.next()
node.set_left(cls.parse_term_exp())
elif next_token_type == Token.ID:
return cls.identifier()
return node
raise ErrorParse(cls.get_next_token().get_line_num(), "factor")
except ErrorParse as e:
print e.content
def parse_factor(cls):
try:
if cls.iterator.has_next():
node = Node(Node.FACTOR)
next_token_type = cls.get_next_token().get_type()
if next_token_type in [Token.LITERAL_INT, Token.LITERAL_DOU]:
node.set_left(cls.parse_literal())
elif next_token_type == Token.LPARENT:
cls.read_token(Token.LBRACKET)
node.set_middle(cls.parse_exp())
cls.read_token(Token.RPARENT)
elif next_token_type == Token.MINUS:
node.set_data_type(Token.MINUS)
cls.currentToken = cls.iterator.next()
node.set_left(cls.parse_term_exp())
elif next_token_type == Token.PLUS:
cls.currentToken == cls.iterator.next()
node.set_left(cls.parse_term_exp())
elif next_token_type == Token.ID:
return cls.identifier()
return node
raise ErrorParse(cls.get_next_token().get_line_num(), "factor")
except ErrorParse as e:
print e.content