From f7f88adc78ba708ff8e76cf09549383657074330 Mon Sep 17 00:00:00 2001
From: Ali Mohammad Pur <ali.mpfard@gmail.com>
Date: Tue, 15 Jun 2021 17:33:47 +0430
Subject: [PATCH] AK: Add a function that casts an enum to its underlying type

This is basically the same thing as `std::to_underlying(Enum)`.
---
 AK/StdLibExtras.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/AK/StdLibExtras.h b/AK/StdLibExtras.h
index 19411fc4b6f..08a5d7a0940 100644
--- a/AK/StdLibExtras.h
+++ b/AK/StdLibExtras.h
@@ -110,6 +110,12 @@ constexpr T exchange(T& slot, U&& value)
 template<typename T>
 using RawPtr = typename Detail::_RawPtr<T>::Type;
 
+template<typename V>
+constexpr decltype(auto) to_underlying(V value) requires(IsEnum<V>)
+{
+    return static_cast<UnderlyingType<V>>(value);
+}
+
 }
 
 using AK::array_size;
@@ -121,3 +127,4 @@ using AK::max;
 using AK::min;
 using AK::RawPtr;
 using AK::swap;
+using AK::to_underlying;