1 files changed, 49 insertions, 0 deletions
diff --git a/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup_modifier.cc b/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup_modifier.cc
new file mode 100644
index 00000000000..c5744533083
--- /dev/null
+++ b/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup_modifier.cc
@@ -0,0 +1,49 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2019 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup depsgraph
+ */
+
+#include "intern/eval/deg_eval_runtime_backup_modifier.h"
+
+namespace DEG {
+
+ModifierDataBackupID::ModifierDataBackupID(const Depsgraph * /*depsgraph*/)
+    : ModifierDataBackupID(NULL, eModifierType_None)
+{
+}
+
+ModifierDataBackupID::ModifierDataBackupID(ModifierData *modifier_data, ModifierType type)
+    : modifier_data(modifier_data), type(type)
+{
+}
+
+bool ModifierDataBackupID::operator<(const ModifierDataBackupID &other) const
+{
+  if (modifier_data < other.modifier_data) {
+    return true;
+  }
+  if (modifier_data == other.modifier_data) {
+    return static_cast<int>(type) < static_cast<int>(other.type);
+  }
+  return false;
+}
+
+}  // namespace DEG