py3kwarn2to3.pytree.WildcardPattern

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A wildcard pattern can match zero or more nodes.

This has all the flexibility needed to implement patterns like:

.*      .+      .?      .{m,n}
(a b c | d e | f)
(...)*  (...)+  (...)?  (...){m,n}

except it always uses non-greedy matching.

src/p/y/py3kwarn-HEAD/py3kwarn2to3/tests/test_pytree.py py3kwarn(Download)

        pl = pytree.LeafPattern(100, "foo", name="pl")
        pn = pytree.NodePattern(1000, [pl], name="pn")
        pw = pytree.WildcardPattern([[pn], [pl, pl]], name="pw")
        r = {}
        self.assertFalse(pw.match_seq([root], r))

        pe = pytree.LeafPattern(1, "e", "pe")
        pf = pytree.LeafPattern(1, "f", "pf")
        pw = pytree.WildcardPattern([[pa, pb, pc], [pd, pe],
                                     [pa, pb], [pc, pd], [pe, pf]],
                                    min=1, max=4, name="pw")

    def test_has_key_example(self):
        pattern = pytree.NodePattern(331,
                                     (pytree.LeafPattern(7),
                                      pytree.WildcardPattern(name="args"),
                                      pytree.LeafPattern(8)))