From 47001ad23349fae130d6faae9409117899eb11cc Mon Sep 17 00:00:00 2001
From: capitalistspz <keipitalists@proton.me>
Date: Wed, 30 Oct 2024 22:10:32 +0000
Subject: [PATCH] Make `MEMPTR<T>` a little more `T*`-like (#1385)

---
 src/Common/MemPtr.h | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/src/Common/MemPtr.h b/src/Common/MemPtr.h
index 7825e4d5..2dc92040 100644
--- a/src/Common/MemPtr.h
+++ b/src/Common/MemPtr.h
@@ -98,35 +98,36 @@ class MEMPTR : MEMPTRBase
 		return MEMPTR<X>(this->m_value);
 	}
 
-	MEMPTR operator+(const MEMPTR& ptr) noexcept
+	sint32 operator-(const MEMPTR& ptr) noexcept
+		requires(!std::is_void_v<T>)
 	{
-		return MEMPTR(this->GetMPTR() + ptr.GetMPTR());
-	}
-	MEMPTR operator-(const MEMPTR& ptr) noexcept
-	{
-		return MEMPTR(this->GetMPTR() - ptr.GetMPTR());
+		return static_cast<sint32>(this->GetMPTR() - ptr.GetMPTR());
 	}
 
 	MEMPTR operator+(sint32 v) noexcept
+		requires(!std::is_void_v<T>)
 	{
 		// pointer arithmetic
-		return MEMPTR(this->GetMPTR() + v * 4);
+		return MEMPTR(this->GetMPTR() + v * sizeof(T));
 	}
 
 	MEMPTR operator-(sint32 v) noexcept
+		requires(!std::is_void_v<T>)
 	{
 		// pointer arithmetic
-		return MEMPTR(this->GetMPTR() - v * 4);
+		return MEMPTR(this->GetMPTR() - v * sizeof(T));
 	}
 
 	MEMPTR& operator+=(sint32 v) noexcept
+		requires(!std::is_void_v<T>)
 	{
 		m_value += v * sizeof(T);
 		return *this;
 	}
 
 	template<typename Q = T>
-	std::enable_if_t<!std::is_same_v<Q, void>, Q>& operator*() const noexcept
+		requires(!std::is_void_v<Q>)
+	Q& operator*() const noexcept
 	{
 		return *GetPtr();
 	}
@@ -137,7 +138,8 @@ class MEMPTR : MEMPTRBase
 	}
 
 	template<typename Q = T>
-	std::enable_if_t<!std::is_same_v<Q, void>, Q>& operator[](int index) noexcept
+		requires(!std::is_void_v<Q>)
+	Q& operator[](int index) noexcept
 	{
 		return GetPtr()[index];
 	}