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pos might be undefined

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Loic Nageleisen 2014-01-26 13:06:23 +01:00
parent 457e24fb31
commit ba160588a0
2 changed files with 8 additions and 2 deletions
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3
test.py
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@ -36,6 +36,9 @@ class TestParser(TestCase):
self.assertEqual(str(parser.parse("(+ '1 (* 3 2))")), self.assertEqual(str(parser.parse("(+ '1 (* 3 2))")),
"(+ . ('1 . ((* . (3 . (2 . NIL))) . NIL)))") "(+ . ('1 . ((* . (3 . (2 . NIL))) . NIL)))")
def test_error_unclosed_list(self):
self.assertRaises(ValueError, parser.parse("(42"))
if __name__ == '__main__': if __name__ == '__main__':
import unittest import unittest

7
wasp/parser/__init__.py
View file

@ -18,8 +18,11 @@ pg = ParserGenerator(["QUOTE", "LPAREN", "RPAREN", "ATOM"],
def error_handler(token): def error_handler(token):
type = token.gettokentype() type = token.gettokentype()
pos = token.getsourcepos() pos = token.getsourcepos()
raise ValueError("unexpected %s at (%s, %s)" % if pos is None:
(type, pos.lineno, pos.colno)) raise ValueError("unexpected %s" % type)
else:
raise ValueError("unexpected %s at (%s, %s)" %
(type, pos.lineno, pos.colno))
@pg.production("main : sexpr") @pg.production("main : sexpr")