Mojo C++ bindings: disallow copy and assign for generated classes when necessary.

mojo/public/tools/bindings/generators/mojom_cpp_generator.py

 # Copyright 2013 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.
 
 """Generates C++ source files from a mojom.Module."""
 
 import mojom.generate.generator as generator
 import mojom.generate.module as mojom
 import mojom.generate.pack as pack
 from mojom.generate.template_expander import UseJinja
@@ skipping 365 matching lines @@
 
 def ShouldInlineStruct(struct):
   # TODO(darin): Base this on the size of the wrapper class.
   if len(struct.fields) > 4:
     return False
   for field in struct.fields:
     if mojom.IsReferenceKind(field.kind) and not mojom.IsStringKind(field.kind):
       return False
   return True
 
+def ContainsMoveOnlyMembers(struct):
+  for field in struct.fields:
+    if IsMoveOnlyKind(field.kind):
+      return True
+  return False
+
 def ShouldInlineUnion(union):
   return not any(
       mojom.IsReferenceKind(field.kind) and not mojom.IsStringKind(field.kind)
            for field in union.fields)
 
 def GetContainerValidateParamsCtorArgs(kind):
   if mojom.IsStringKind(kind):
     expected_num_elements = 0
     element_is_nullable = False
     key_validate_params = "nullptr"
@@ skipping 33 matching lines @@
       not mojom.IsStringKind(kind)):
     return "nullptr"
 
   return "new mojo::internal::ContainerValidateParams(%s)" % (
       GetContainerValidateParamsCtorArgs(kind))
 
 class Generator(generator.Generator):
 
   cpp_filters = {
     "constant_value": ConstantValue,
+    "contains_move_only_members": ContainsMoveOnlyMembers,
     "cpp_wrapper_param_type": GetCppWrapperParamType,
     "cpp_data_view_type": GetCppDataViewType,
     "cpp_field_type": GetCppFieldType,
     "cpp_union_field_type": GetCppUnionFieldType,
     "cpp_pod_type": GetCppPodType,
     "cpp_union_getter_return_type": GetUnionGetterReturnType,
     "cpp_wrapper_type": GetCppWrapperType,
     "default_value": DefaultValue,
     "expression_to_text": ExpressionToText,
     "get_container_validate_params_ctor_args":
@@ skipping 110 matching lines @@
       _variant = self.variant
       suffix = "-%s" % self.variant if self.variant else ""
       self.Write(self.GenerateModuleHeader(),
                  self.MatchMojomFilePath("%s%s.h" % (self.module.name, suffix)))
       self.Write(self.GenerateModuleInternalHeader(),
                  self.MatchMojomFilePath("%s%s-internal.h" %
                                              (self.module.name, suffix)))
       self.Write(
           self.GenerateModuleSource(),
           self.MatchMojomFilePath("%s%s.cc" % (self.module.name, suffix)))