From 7d5316bd79cc720f8c35694cc6443563f304789c Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Wed, 25 Feb 2026 08:25:03 -0500
Subject: [PATCH] Allow get_rcp() to be called on a const reference

---
 include/rcp.h |  4 ++--
 tests.cpp     | 11 +++++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/include/rcp.h b/include/rcp.h
index 9d33a6a..1d169bc 100644
--- a/include/rcp.h
+++ b/include/rcp.h
@@ -297,9 +297,9 @@ rcp<T> rcp_dynamic_cast(rcp<U> && other)
 
 #define rcp_managed(classname) \
     public: \
-        rcp<classname> get_rcp() \
+        rcp<classname> get_rcp() const \
         { \
-            return rcp<classname>(this); \
+            return rcp<classname>(const_cast<classname *>(this)); \
         } \
         template <typename... Args> \
         static rcp<classname> create(Args&&... args) \
diff --git a/tests.cpp b/tests.cpp
index a1d4df9..0f9d695 100644
--- a/tests.cpp
+++ b/tests.cpp
@@ -114,6 +114,16 @@ struct Receiver
     }
 };
 
+void test_get_rcp_const()
+{
+    auto a = MyObj::create();
+    const MyObj & ref = *a;
+    rcp<MyObj> b = ref.get_rcp();
+    assert(b);
+    assert(b->v == 42);
+    assert(b.use_count() == 2);
+}
+
 void test_multi_construct_from_raw_pointers()
 {
     Receiver r;
@@ -423,6 +433,7 @@ int main(int argc, char * argv[])
     test_dereference();
     test_booleans();
     test_create();
+    test_get_rcp_const();
     test_multi_construct_from_raw_pointers();
     test_listener_self_registration();
     test_copy_assignment_decrements_previous_reference();