From 703abac9c80f85300e90d51208a2dbba469ccf6d Mon Sep 17 00:00:00 2001
From: Andrew Kaster <andrew@ladybird.org>
Date: Tue, 15 Apr 2025 15:56:58 -0600
Subject: [PATCH] AK: Add const_cast escape hatch for converting const T& to
 `RefPtr<T>`

There are parts of the codebase where properly const-correctifying the
the code would be a giant spaghetti mess, so add this loud workaround
to defer the refactoring for later.
---
 AK/RefPtr.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/AK/RefPtr.h b/AK/RefPtr.h
index 4276b82b786..ad0199b47f6 100644
--- a/AK/RefPtr.h
+++ b/AK/RefPtr.h
@@ -312,6 +312,24 @@ inline RefPtr<T> static_ptr_cast(RefPtr<U> const& ptr)
     return RefPtr<T>(static_cast<T const*>(ptr.ptr()));
 }
 
+template<typename T>
+inline NonnullRefPtr<T> fixme_launder_const_through_pointer_cast(NonnullRefPtr<T const> const& ptr)
+{
+    return NonnullRefPtr<T>(const_cast<T&>(*ptr));
+}
+
+template<typename T>
+inline RefPtr<T> fixme_launder_const_through_pointer_cast(RefPtr<T const> const& ptr)
+{
+    return RefPtr<T>(const_cast<T*>(ptr.ptr()));
+}
+
+template<typename T>
+inline NonnullRefPtr<T> fixme_launder_const_through_pointer_cast(T const& ptr)
+{
+    return NonnullRefPtr<T>(const_cast<T&>(ptr));
+}
+
 template<typename T, typename U>
 requires(IsConvertible<U*, T*>)
 inline void swap(RefPtr<T>& a, RefPtr<U>& b)