From daae3011b722202a8b5fbe5d39cff3add39bab3c Mon Sep 17 00:00:00 2001
From: pybind11_protobuf authors <no-reply@google.com>
Date: Sat, 4 Jul 2026 00:16:25 -0700
Subject: [PATCH] Automated Code Change

PiperOrigin-RevId: 942391721
---
 pybind11_protobuf/proto_cast_util.cc | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/pybind11_protobuf/proto_cast_util.cc b/pybind11_protobuf/proto_cast_util.cc
index ddd81d6..666fec8 100644
--- a/pybind11_protobuf/proto_cast_util.cc
+++ b/pybind11_protobuf/proto_cast_util.cc
@@ -87,7 +87,7 @@ absl::optional<py::object> ResolveAttrs(
     PyObject* attr = PyObject_GetAttrString(obj.ptr(), name);
     if (attr == nullptr) {
       PyErr_Clear();
-      return absl::nullopt;
+      return std::nullopt;
     }
     tmp = py::reinterpret_steal<py::object>(attr);
     obj = py::handle(attr);
@@ -110,7 +110,7 @@ absl::optional<py::object> ResolveAttrMRO(py::handle obj, const char* name) {
       return py::reinterpret_steal<py::object>(attr);
     }
     PyErr_Clear();
-    return absl::nullopt;
+    return std::nullopt;
   }
 
   auto unicode = py::reinterpret_steal<py::object>(PyUnicode_FromString(name));
@@ -132,7 +132,7 @@ absl::optional<py::object> ResolveAttrMRO(py::handle obj, const char* name) {
       PyErr_Clear();
     }
   }
-  return absl::nullopt;
+  return std::nullopt;
 }
 
 absl::optional<std::string> CastToOptionalString(py::handle src) {
@@ -141,7 +141,7 @@ absl::optional<std::string> CastToOptionalString(py::handle src) {
   if (c.load(src, false)) {
     return pybind11::detail::cast_op<std::string>(std::move(c));
   }
-  return absl::nullopt;
+  return std::nullopt;
 }
 
 class GlobalState {
@@ -498,7 +498,7 @@ absl::optional<std::string> PyProtoDescriptorFullName(py::handle py_proto) {
   if (py_full_name) {
     return CastToOptionalString(*py_full_name);
   }
-  return absl::nullopt;
+  return std::nullopt;
 }
 
 bool PyProtoHasMatchingFullName(py::handle py_proto,