Update mojo sdk to rev 59145288bae55b0fce4276b017df6a1117bcf00f

mojo/public/tools/bindings/pylib/mojom/parse/ast.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Node classes for the AST for a Mojo IDL file."""
 
 # Note: For convenience of testing, you probably want to define __eq__() methods
 # for all node types; it's okay to be slightly lax (e.g., not compare filename
 # and lineno). You may also define __repr__() to help with analyzing test
 # failures, especially for more complex types.
@@ skipping 334 matching lines @@
            self.ordinal == other.ordinal and \
            self.typename == other.typename and \
            self.default_value == other.default_value
 
 
 # This needs to be declared after |StructField|.
 class StructBody(NodeListBase):
   """Represents the body of (i.e., list of definitions inside) a struct."""
 
   _list_item_type = (Const, Enum, StructField)
+
+
+class Union(Definition):
+  """Represents a union definition."""
+
+  def __init__(self, name, body, **kwargs):
+    assert isinstance(body, UnionBody)
+    super(Union, self).__init__(name, **kwargs)
+    self.body = body
+
+  def __eq__(self, other):
+    return super(Union, self).__eq__(other) and \
+           self.body == other.body
+
+
+class UnionField(Definition):
+
+  def __init__(self, name, ordinal, typename, **kwargs):
+    assert isinstance(name, str)
+    assert ordinal is None or isinstance(ordinal, Ordinal)
+    assert isinstance(typename, str)
+    super(UnionField, self).__init__(name, **kwargs)
+    self.ordinal = ordinal
+    self.typename = typename
+
+  def __eq__(self, other):
+    return super(UnionField, self).__eq__(other) and \
+           self.ordinal == other.ordinal and \
+           self.typename == other.typename
+
+
+class UnionBody(NodeListBase):
+
+  _list_item_type = UnionField