#125 Partial concept refactor

Source/Cloud9/Tools/Concepts.h

@@ -0,0 +1,56 @@
+// Copyright (c) 2023 Alexei Gladkikh
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+
+#pragma once
+
+/**
+ * std abstraction because UE4 has self APIs to avoid mixin std and UE4 APIs
+ */
+namespace Concepts
+{
+	template <typename SelfType>
+	concept incrementable = requires(SelfType Self)
+	{
+		++Self;
+	};
+
+	template <typename SelfType, typename OtherType>
+	concept plusassingable =
+		incrementable<SelfType>
+		&& requires(SelfType Self, OtherType Other)
+		{
+			Self += Other;
+		};
+
+	template <typename SelfType, typename BoundType>
+	concept dereferencable = requires(SelfType Self)
+	{
+		{ *Self } -> std::convertible_to<BoundType>;
+	};
+
+	template <typename SelfType, typename BoundType>
+	concept convertiable = requires(SelfType Self)
+	{
+		{ Self } -> std::convertible_to<BoundType>;
+	};
+}

Source/Cloud9/Tools/Extensions/FString.h

@@ -24,13 +24,13 @@
 #pragma once
 
 #include "Cloud9/Tools/Macro/Operator.h"
-#include "Cloud9/Tools/Macro/Template.h"
+#include "Cloud9/Tools/Concepts.h"
 
 namespace EFString
 {
 	struct ToCStr
 	{
-		template <typename SelfType, sametype(SelfType, FString)>
+		template <typename SelfType> requires Concepts::convertiable<SelfType, FString>
 		FORCEINLINE const TCHAR* operator()(SelfType&& Self) const { return *Self; }
 
 		OPERATOR_BODY(ToCStr)

Source/Cloud9/Tools/Extensions/FVector.h

@@ -24,13 +24,13 @@
 #pragma once
 
 #include "Cloud9/Tools/Macro/Operator.h"
-#include "Cloud9/Tools/Macro/Template.h"
+#include "Cloud9/Tools/Concepts.h"
 
 namespace EFVector
 {
 	struct Normalize
 	{
-		template <typename SelfType, sametype(SelfType, FVector)>
+		template <typename SelfType> requires Concepts::convertiable<SelfType, FVector>
 		FORCEINLINE FVector operator()(SelfType&& Self) const
 		{
 			FVector Normalized = Self;

Source/Cloud9/Tools/Extensions/TContainer.h

@@ -20,35 +20,13 @@
 
 #pragma once
 
+#include "Cloud9/Tools/Concepts.h"
 #include "Cloud9/Tools/Macro/Common.h"
 #include "Cloud9/Tools/Macro/Logging.h"
 #include "Cloud9/Tools/Macro/Operator.h"
 #include "Cloud9/Tools/Containers/Sequence.h"
 #include "Cloud9/Tools/Extensions/TOptional.h"
 
-namespace Concepts
-{
-	template <typename IteratorType>
-	concept incrementable = requires(IteratorType Iterator)
-	{
-		++Iterator;
-	};
-
-	template <typename IteratorType, typename SizeType>
-	concept moveable =
-		incrementable<IteratorType>
-		&& requires(IteratorType Iterator, SizeType Distance)
-		{
-			Iterator += Distance;
-		};
-
-	template <typename IteratorType, typename ValueType>
-	concept dereferencable = requires(IteratorType Iterator)
-	{
-		{ *Iterator } -> std::convertible_to<ValueType>;
-	};
-}
-
 namespace ETIterator
 {
 	template <typename SizeType>
@@ -62,7 +40,7 @@ namespace ETIterator
 			return Self;
 		}
 
-		constexpr auto operator()(Concepts::moveable<SizeType> auto Self) const
+		constexpr auto operator()(Concepts::plusassingable<SizeType> auto Self) const
 		{
 			Self += Distance;
 			return Self;