From 5809adc5cdaad64d1a73458e6c3fa19d6823cd83 Mon Sep 17 00:00:00 2001
From: Jakub Piasecki <piaseckijakub@meta.com>
Date: Tue, 10 Mar 2026 06:37:32 -0700
Subject: [PATCH] Fix ordering of `const` and `mutable` keywords (#56027)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/56027

Changelog: [Internal]

The current implementation swaps the ordering of `const` and `mutable` keywords. This diff fixes it.

Differential Revision: D95912404
---
 scripts/cxx-api/parser/member.py              |  6 +++---
 .../snapshot.api                              |  5 +++++
 .../test.h                                    | 19 +++++++++++++++++++
 3 files changed, 27 insertions(+), 3 deletions(-)
 create mode 100644 scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/snapshot.api
 create mode 100644 scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/test.h

diff --git a/scripts/cxx-api/parser/member.py b/scripts/cxx-api/parser/member.py
index 3fd415f2d229..92a5c8631e6f 100644
--- a/scripts/cxx-api/parser/member.py
+++ b/scripts/cxx-api/parser/member.py
@@ -171,12 +171,12 @@ def to_string(
         if self.is_constexpr:
             result += "constexpr "
 
-        if self.is_const and not self.is_constexpr:
-            result += "const "
-
         if self.is_mutable:
             result += "mutable "
 
+        if self.is_const and not self.is_constexpr:
+            result += "const "
+
         if self._is_function_pointer():
             formatted_args = format_arguments(self._fp_arguments)
             qualified_type = format_parsed_type(self._parsed_type)
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/snapshot.api b/scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/snapshot.api
new file mode 100644
index 000000000000..2066064f32f6
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/snapshot.api
@@ -0,0 +1,5 @@
+class test::Cache {
+  public const int* constPtr;
+  public mutable const int* mutableConstPtr;
+  public mutable int* mutablePtr;
+}
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/test.h b/scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/test.h
new file mode 100644
index 000000000000..06b03e665c32
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_mutable_const_pointer_ordering/test.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+namespace test {
+
+class Cache {
+ public:
+  mutable int *mutablePtr;
+  const int *constPtr;
+  mutable const int *mutableConstPtr;
+};
+
+} // namespace test