Fixed bug #31 in many() backtracking

mvasilkov · Nov 17, 2011 · f955c70 · f955c70
1 parent a17117c
commit f955c70
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/src/funcparserlib/parser.py b/src/funcparserlib/parser.py
@@ -323,7 +323,7 @@ def __call__(self, tokens, s):
                 v, s = self.p(tokens, s)
                 res.append(v)
         except _NoParseError, e:
-            return res, e.state
+            return res, _State(s.pos, e.state.max)
 
     def ebnf(self):
         return u'{ %s }' % self.p

diff --git a/tests/test_parsing.py b/tests/test_parsing.py
@@ -0,0 +1,10 @@
+from nose.tools import eq_
+from funcparserlib.parser import a, many
+
+# Issue 31
+def test_many_backtracking():
+    x = a('x')
+    y = a('y')
+    expr = many(x + y) + x + x
+    eq_(expr.parse('xyxyxx'), ([('x', 'y'), ('x', 'y')], 'x', 'x'))
+