1 files changed, 73 insertions, 0 deletions
diff --git a/lib/python2.7/lib2to3/fixes/fix_xrange.py b/lib/python2.7/lib2to3/fixes/fix_xrange.py
new file mode 100644
index 0000000..f143672
--- /dev/null
+++ b/lib/python2.7/lib2to3/fixes/fix_xrange.py
@@ -0,0 +1,73 @@
+# Copyright 2007 Google, Inc. All Rights Reserved.
+# Licensed to PSF under a Contributor Agreement.
+
+"""Fixer that changes xrange(...) into range(...)."""
+
+# Local imports
+from .. import fixer_base
+from ..fixer_util import Name, Call, consuming_calls
+from .. import patcomp
+
+
+class FixXrange(fixer_base.BaseFix):
+    BM_compatible = True
+    PATTERN = """
+              power<
+                 (name='range'|name='xrange') trailer< '(' args=any ')' >
+              rest=any* >
+              """
+
+    def start_tree(self, tree, filename):
+        super(FixXrange, self).start_tree(tree, filename)
+        self.transformed_xranges = set()
+
+    def finish_tree(self, tree, filename):
+        self.transformed_xranges = None
+
+    def transform(self, node, results):
+        name = results["name"]
+        if name.value == u"xrange":
+            return self.transform_xrange(node, results)
+        elif name.value == u"range":
+            return self.transform_range(node, results)
+        else:
+            raise ValueError(repr(name))
+
+    def transform_xrange(self, node, results):
+        name = results["name"]
+        name.replace(Name(u"range", prefix=name.prefix))
+        # This prevents the new range call from being wrapped in a list later.
+        self.transformed_xranges.add(id(node))
+
+    def transform_range(self, node, results):
+        if (id(node) not in self.transformed_xranges and
+            not self.in_special_context(node)):
+            range_call = Call(Name(u"range"), [results["args"].clone()])
+            # Encase the range call in list().
+            list_call = Call(Name(u"list"), [range_call],
+                             prefix=node.prefix)
+            # Put things that were after the range() call after the list call.
+            for n in results["rest"]:
+                list_call.append_child(n)
+            return list_call
+
+    P1 = "power< func=NAME trailer< '(' node=any ')' > any* >"
+    p1 = patcomp.compile_pattern(P1)
+
+    P2 = """for_stmt< 'for' any 'in' node=any ':' any* >
+            | comp_for< 'for' any 'in' node=any any* >
+            | comparison< any 'in' node=any any*>
+         """
+    p2 = patcomp.compile_pattern(P2)
+
+    def in_special_context(self, node):
+        if node.parent is None:
+            return False
+        results = {}
+        if (node.parent.parent is not None and
+               self.p1.match(node.parent.parent, results) and
+               results["node"] is node):
+            # list(d.keys()) -> list(d.keys()), etc.
+            return results["func"].value in consuming_calls
+        # for ... in d.iterkeys() -> for ... in d.keys(), etc.
+        return self.p2.match(node.parent, results) and results["node"] is node