Mojo: Mojom: Add Import, ImportList, and Mojom AST types.

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 61 matching lines @@
 class Attribute(NodeBase):
   """Represents an attribute."""
 
   def __init__(self, key, value, **kwargs):
     assert isinstance(key, str)
     NodeBase.__init__(self, **kwargs)
     self.key = key
     self.value = value
 
   def __eq__(self, other):
-    return self.key == other.key and self.value == other.value
+    return type(self) == type(other) and \
+           self.key == other.key and \
+           self.value == other.value
 
 
 class AttributeList(NodeListBase):
   """Represents a list attributes."""
 
   _list_item_type = Attribute
 
 
 class Import(NodeBase):
   """Represents an import statement."""
 
   def __init__(self, import_filename, **kwargs):
     assert isinstance(import_filename, str)
     NodeBase.__init__(self, **kwargs)
     self.import_filename = import_filename
 
   def __eq__(self, other):
-    return self.import_filename == other.import_filename
+    return type(self) == type(other) and \
+           self.import_filename == other.import_filename
 
 
 class ImportList(NodeListBase):
   """Represents a list (i.e., sequence) of import statements."""
 
   _list_item_type = Import
 
 
 class Module(NodeBase):
   """Represents a module statement."""
 
   def __init__(self, name, attribute_list, **kwargs):
     # |name| is either none or a "wrapped identifier".
     assert name is None or isinstance(name, tuple)
     assert attribute_list is None or isinstance(attribute_list, AttributeList)
     NodeBase.__init__(self, **kwargs)
     self.name = name
     self.attribute_list = attribute_list
 
   def __eq__(self, other):
-    return self.name == other.name and \
+    return type(self) == type(other) and \
+           self.name == other.name and \
            self.attribute_list == other.attribute_list
 
 
+class Mojom(NodeBase):
+  """Represents an entire .mojom file. (This is the root node."""
+
+  def __init__(self, module, import_list, definition_list, **kwargs):
+    assert module is None or isinstance(module, Module)
+    assert isinstance(import_list, ImportList)
+    assert isinstance(definition_list, list)
+    NodeBase.__init__(self, **kwargs)
+    self.module = module
+    self.import_list = import_list
+    self.definition_list = definition_list
+
+  def __eq__(self, other):
+    return type(self) == type(other) and \
+           self.module == other.module and \
+           self.import_list == other.import_list and \
+           self.definition_list == other.definition_list
+
+  def __repr__(self):
+    return "%s(%r, %r, %r)" % (self.__class__.__name__, self.module,
+                               self.import_list, self.definition_list)
+
+
 class Ordinal(NodeBase):
   """Represents an ordinal value labeling, e.g., a struct field."""
 
   def __init__(self, value, **kwargs):
     assert value is None or isinstance(value, int)
     NodeBase.__init__(self, **kwargs)
     self.value = value
 
   def __eq__(self, other):
-    return self.value == other.value
+    return type(self) == type(other) and self.value == other.value
 
 
 class Parameter(NodeBase):
   """Represents a method request or response parameter."""
 
   def __init__(self, typename, name, ordinal, **kwargs):
     assert isinstance(ordinal, Ordinal)
     NodeBase.__init__(self, **kwargs)
     self.typename = typename
     self.name = name
     self.ordinal = ordinal
 
   def __eq__(self, other):
-    return self.typename == other.typename and \
+    return type(self) == type(other) and \
+           self.typename == other.typename and \
            self.name == other.name and \
            self.ordinal == other.ordinal
 
 
 class ParameterList(NodeListBase):
   """Represents a list of (method request or response) parameters."""
 
   _list_item_type = Parameter