From 771473b62a3371eade3ac5ceb5789a9f9d3b3393 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Wed, 25 Feb 2026 09:22:39 -0500
Subject: [PATCH] Rename template parameter to reduce chance of conflict

---
 include/rcp.h |  2 +-
 tests.cpp     | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/include/rcp.h b/include/rcp.h
index 5912a2a..896af56 100644
--- a/include/rcp.h
+++ b/include/rcp.h
@@ -292,7 +292,7 @@ rcp<T> rcp_dynamic_cast(rcp<U> && other)
         { \
             return rcp_ref_count.load(std::memory_order_relaxed); \
         } \
-        template <typename T> friend class rcp; \
+        template <typename RCP_T_> friend class rcp; \
     rcp_managed(classname)
 
 #define rcp_managed(classname) \
diff --git a/tests.cpp b/tests.cpp
index 0f9d695..82159e5 100644
--- a/tests.cpp
+++ b/tests.cpp
@@ -413,6 +413,27 @@ void test_hash()
     assert(map.find(c) == map.end());
 }
 
+template <typename T>
+struct Box
+{
+    rcp_managed_root(Box);
+protected:
+    Box(T v) : v(v) {}
+public:
+    T v;
+};
+
+void test_class_template()
+{
+    auto a = Box<int>::create(42);
+    auto b = Box<int>::create(99);
+    assert(a->v == 42);
+    assert(b->v == 99);
+    auto c = a;
+    assert(c->v == 42);
+    assert(c.use_count() == 2);
+}
+
 void test_external_class()
 {
     int before = external_destruct;
@@ -454,6 +475,7 @@ int main(int argc, char * argv[])
     test_use_count();
     test_swap();
     test_hash();
+    test_class_template();
     test_external_class();
     return 0;
 }