Fix in sequence backtracking

9360398a · Igor Dejanovic · 49025b9e · 9360398a
Commit 9360398a authored Aug 06, 2014 by Igor Dejanovic
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__init__.py arpeggio/__init__.py +2 -0

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--- a/arpeggio/__init__.py
+++ b/arpeggio/__init__.py
@@ -269,12 +269,14 @@ class Sequence(ParsingExpression):
    """
    def _parse(self, parser):
        results = []
+        c_pos = parser.position
        try:
            for e in self.nodes:
                result = e.parse(parser)
                if result:
                    results.append(result)
        except NoMatch as m:
+            parser.position = c_pos # Backtracking
            self._nm_change_rule(m, parser)
            raise