def comp_expr(self):
res = ParseResult()
if self.current_tok.matches(token.T_KEYWORD, 'not'):
op_tok = self.current_tok
res.register_advancement()
self.advance()
node = res.register(self.comp_expr())
if res.error: return res
return res.success(nodes.UnaryOpNode(op_tok, node))
node = res.register(
self.bin_op(self.arithm_expr,
(token.T_EE, token.T_NE, token.T_LT, token.T_GT,
token.T_LTE, token.T_GTE)))
if res.error:
return res.failure(
errors.InvalidSyntaxError(
self.current_tok.pos_start, self.current_tok.pos_end,
"Expected int or float, identifier, '+', '-', '(', '[' or 'not'"
))
return res.success(node)
def factor(self):
res = ParseResult()
tok = self.current_tok
if tok.type in (token.T_PLUS, token.T_MINUS):
res.register_advancement()
self.advance()
factor = res.register(self.factor())
if res.error: return res
return res.success(nodes.UnaryOpNode(tok, factor))
return self.power()