From 9a5dba9e0992d1fe77af0b6ec61dee22e25b1f3e Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Wed, 15 Apr 2020 16:51:36 +0200
Subject: [PATCH] AK: Add MakeUnsigned<T> helper template

---
 AK/StdLibExtras.h | 55 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/AK/StdLibExtras.h b/AK/StdLibExtras.h
index e0fba83309..5a714fee2f 100644
--- a/AK/StdLibExtras.h
+++ b/AK/StdLibExtras.h
@@ -316,6 +316,60 @@ inline constexpr T&& forward(typename RemoveReference<T>::Type&& param) noexcept
     return static_cast<T&&>(param);
 }
 
+template<typename T>
+struct MakeUnsigned {
+};
+
+template<>
+struct MakeUnsigned<char> {
+    typedef unsigned char type;
+};
+
+template<>
+struct MakeUnsigned<short> {
+    typedef unsigned short type;
+};
+
+template<>
+struct MakeUnsigned<int> {
+    typedef unsigned type;
+};
+
+template<>
+struct MakeUnsigned<long> {
+    typedef unsigned long type;
+};
+
+template<>
+struct MakeUnsigned<long long> {
+    typedef unsigned long long type;
+};
+
+template<>
+struct MakeUnsigned<unsigned char> {
+    typedef unsigned char type;
+};
+
+template<>
+struct MakeUnsigned<unsigned short> {
+    typedef unsigned short type;
+};
+
+template<>
+struct MakeUnsigned<unsigned int> {
+    typedef unsigned type;
+};
+
+template<>
+struct MakeUnsigned<unsigned long> {
+    typedef unsigned long type;
+};
+
+template<>
+struct MakeUnsigned<unsigned long long> {
+    typedef unsigned long long type;
+};
+
 }
 
 using AK::ceil_div;
@@ -324,6 +378,7 @@ using AK::Conditional;
 using AK::exchange;
 using AK::forward;
 using AK::IsSame;
+using AK::MakeUnsigned;
 using AK::max;
 using AK::min;
 using AK::move;