1 files changed, 24 insertions, 0 deletions
diff --git a/absl/types/optional.cc b/absl/types/optional.cc
new file mode 100644
index 000000000000..ef2729041990
--- /dev/null
+++ b/absl/types/optional.cc
@@ -0,0 +1,24 @@
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/types/optional.h"
+
+#ifndef ABSL_HAVE_STD_OPTIONAL
+namespace absl {
+
+nullopt_t::init_t nullopt_t::init;
+extern const nullopt_t nullopt{nullopt_t::init};
+
+}  // namespace absl
+#endif  // ABSL_HAVE_STD_OPTIONAL