def expr(self):
node = self.term()
if self.is_next(Type.BinaryOperation.Or):
while self.token.type in (Type.BinaryOperation.Or):
operation_token = self.token
self.next_token()
new_node = self.term()
node = Node.BinaryOperation(node, new_node, operation_token)
else:
while self.token.type in (Type.BinaryOperation.Plus,
Type.BinaryOperation.Minus):
operation_token = self.token
self.next_token()
new_node = self.term()
node = Node.BinaryOperation(node, new_node, operation_token)
return node
def term(self):
node = self.factor()
if self.is_next(Type.BinaryOperation.And):
while self.token.type in (Type.BinaryOperation.And):
operation_token = self.token
self.next_token()
new_node = self.factor()
node = Node.BinaryOperation(node, new_node, operation_token)
else:
while self.token.type in (Type.BinaryOperation.Mul,
Type.BinaryOperation.Div,
Type.BinaryOperation.Mod,
Type.BinaryOperation.DivInt):
operation_token = self.token
self.next_token()
new_node = self.factor()
node = Node.BinaryOperation(node, new_node, operation_token)
return node
def comparing_expr(self):
handle_operations = [
Type.BinaryOperation.Equal,
Type.BinaryOperation.NotEqual,
Type.BinaryOperation.Less,
Type.BinaryOperation.LessEqual,
Type.BinaryOperation.Bigger,
Type.BinaryOperation.BiggerEqual,
]
node = self.expr()
if self.is_next(handle_operations):
operation_token = self.token
self.next_token()
new_node = self.expr()
node = Node.BinaryOperation(node, new_node, operation_token)
return node