def parse_unary(self):
token_type = self.stream.current.type
lineno = self.stream.current.lineno
if token_type == 'sub':
next(self.stream)
node = self.parse_unary()
return nodes.Neg(node, lineno=lineno)
if token_type == 'add':
next(self.stream)
node = self.parse_unary()
return nodes.Pos(node, lineno=lineno)
return self.parse_primary()
def parse_unary(self, with_postfix=True):
token_type = self.stream.current.type
lineno = self.stream.current.lineno
if token_type == 'sub':
next(self.stream)
node = nodes.Neg(self.parse_unary(False), lineno=lineno)
elif token_type == 'add':
next(self.stream)
node = nodes.Pos(self.parse_unary(False), lineno=lineno)
else:
node = self.parse_primary()
if with_postfix:
node = self.parse_postfix(node)
return node
def parse_unary(self, with_filter=True):
token_type = self.stream.current.type
lineno = self.stream.current.lineno
if token_type == "sub":
next(self.stream)
node = nodes.Neg(self.parse_unary(False), lineno=lineno)
elif token_type == "add":
next(self.stream)
node = nodes.Pos(self.parse_unary(False), lineno=lineno)
else:
node = self.parse_primary()
node = self.parse_postfix(node)
if with_filter:
node = self.parse_filter_expr(node)
return node
def parse_unary(self):
token_type = self.stream.current.type
lineno = self.stream.current.lineno
if token_type is 'name' and self.stream.current.value == 'not':
self.stream.next()
node = self.parse_unary()
return nodes.Not(node, lineno=lineno)
if token_type is 'sub':
self.stream.next()
node = self.parse_unary()
return nodes.Neg(node, lineno=lineno)
if token_type is 'add':
self.stream.next()
node = self.parse_unary()
return nodes.Pos(node, lineno=lineno)
return self.parse_primary()
