From 5bf994d2d9fffa73f22f25f792e1482dc43a694e Mon Sep 17 00:00:00 2001
From: Emanuele Torre <torreemanuele6@gmail.com>
Date: Sat, 1 Aug 2020 07:13:50 +0200
Subject: [PATCH] AK: Use C++20 concepts to only allow Userspace wrappers of
 pointers

It was a bit odd that you could create a Userspace<int> and that
Userspace<int>::ptr() returned an int instead of an int*.

Let's use C++20 concepts to only allow creating Userspace objects with
pointer types. :^)
---
 AK/Userspace.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/AK/Userspace.h b/AK/Userspace.h
index 8f02f6d72f5..d499363de6b 100644
--- a/AK/Userspace.h
+++ b/AK/Userspace.h
@@ -26,11 +26,15 @@
 
 #pragma once
 
+#include <AK/StdLibExtras.h>
 #include <AK/Types.h>
 
 namespace AK {
 
 template<typename T>
+concept PointerTypeName = IsPointer<T>::value;
+
+template<PointerTypeName T>
 class Userspace {
 public:
     Userspace() { }