#253 Added FromIterator Extension

xthebat · Mar 18, 2024 · 3abd6d0 · 3abd6d0
1 parent 3e976d8
commit 3abd6d0
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Showing 4 changed files with 73 additions and 6 deletions.
diff --git a/Source/Cloud9/Tools/Cloud9ToolsLibrary.cpp b/Source/Cloud9/Tools/Cloud9ToolsLibrary.cpp
@@ -128,3 +128,18 @@ FVector UCloud9ToolsLibrary::VInterpTo(
 		ClampLerp(Current.Z, Dist.Z, Alpha.Z, Target.Z),
 	};
 }
+
+TArray<FString> UCloud9ToolsLibrary::GetObjectEditorProperties(UClass* Class)
+{
+	if (IsValid(Class))
+	{
+		return TFieldIterator<FProperty>(Class)
+			| ETContainer::FromIterator{}
+			| ETContainer::Filter{[](let& It) { return It.HasAnyPropertyFlags(CPF_Edit); }}
+			| ETContainer::Transform{[](let& It) { return It.GetName(); }}
+			| ETContainer::ToArray{};
+	}
+
+	log(Error, "Input class is invalid");
+	return {};
+}
diff --git a/Source/Cloud9/Tools/Cloud9ToolsLibrary.h b/Source/Cloud9/Tools/Cloud9ToolsLibrary.h
@@ -101,4 +101,6 @@ class CLOUD9_API UCloud9ToolsLibrary : public UBlueprintFunctionLibrary
 		const FVector Target,
 		float DeltaTime,
 		const FVector InterpSpeed);
+
+	static TArray<FString> GetObjectEditorProperties(UClass* Class);
 };
diff --git a/Source/Cloud9/Tools/Containers/Sequence.h b/Source/Cloud9/Tools/Containers/Sequence.h
@@ -54,7 +54,7 @@ class TSequence
 	/**
 	 * Function returns current underlying Iterator value.
 	 */
-	ElementType operator*() const { return *Iterator; }
+	const ElementType& operator*() { return *Iterator; }
 
 	/**
 	 * Function returns false if sequence is empty.

diff --git a/Source/Cloud9/Tools/Extensions/TContainer.h b/Source/Cloud9/Tools/Extensions/TContainer.h
@@ -62,6 +62,9 @@ namespace ETIterator
 
 namespace Private_ETContainer
 {
+	template <typename OperatorType, typename ContainerType>
+	struct TFromIteratorIterator;
+
 	template <typename OperatorType, typename ContainerType>
 	struct TTransformIterator;
 
@@ -77,6 +80,19 @@ namespace Private_ETContainer
 
 namespace ETContainer
 {
+	struct FromIterator
+	{
+		template <typename ElementType>
+		constexpr auto operator()(TFieldIterator<ElementType>&& Self) const
+		{
+			using FIteratorType = TFieldIterator<ElementType>;
+			var Iterator = Private_ETContainer::TFromIteratorIterator<ElementType, FIteratorType>(Self);
+			return TSequence<ElementType, decltype(Iterator)>(MoveTemp(Iterator));
+		}
+
+		OPERATOR_BODY(FromIterator)
+	};
+
 	struct Random
 	{
 		template <typename ContainerType, typename ElementType = typename ContainerType::ElementType>
@@ -299,6 +315,33 @@ namespace ETContainer
 
 namespace Private_ETContainer
 {
+	template <typename InElementType, typename InIteratorType>
+	struct TFromIteratorIterator
+	{
+		using IteratorType = InIteratorType;
+		using ElementType = InElementType;
+
+		constexpr explicit TFromIteratorIterator(IteratorType Iterator): Iterator(Iterator) {}
+
+		// ReSharper disable once CppMemberFunctionMayBeStatic
+		constexpr void Initialize() {}
+
+		constexpr TFromIteratorIterator& operator++()
+		{
+			++Iterator;
+			return *this;
+		}
+
+		constexpr const ElementType& operator*() { return **Iterator; }
+
+		// constexpr ElementType operator*() { return **Iterator; }
+
+		constexpr explicit operator bool() const { return not Iterator; }
+
+	private:
+		IteratorType Iterator;;
+	};
+
 	template <typename OperatorType, typename ContainerType>
 	struct TTransformIterator
 	{
@@ -323,7 +366,11 @@ namespace Private_ETContainer
 
 		// constexpr const ElementType& operator->() const { return Iterator; }
 
-		constexpr ElementType operator*() const { return Operator.Operation(*Iterator); }
+		constexpr const ElementType& operator*()
+		{
+			Cache = Operator.Operation(*Iterator);
+			return *Cache;
+		}
 
 		constexpr explicit operator bool() const { return not Iterator; }
 
@@ -333,6 +380,8 @@ namespace Private_ETContainer
 		ContainerType Container;
 		IteratorType Iterator;
 		OperatorType Operator;
+
+		TOptional<ElementType> Cache;
 	};
 
 	template <typename OperatorType, typename ContainerType>
@@ -356,7 +405,7 @@ namespace Private_ETContainer
 
 		constexpr const ElementType& operator->() const { return Iterator; }
 
-		constexpr ElementType operator*() const { return *Iterator; }
+		constexpr const ElementType& operator*() { return *Iterator; }
 
 		constexpr explicit operator bool() const { return not Iterator; }
 
@@ -371,7 +420,8 @@ namespace Private_ETContainer
 
 			if (not bIsFound)
 			{
-				while (Iterator and not Operator.Predicate(*Iterator))
+				let& Value = *Iterator;
+				while (Iterator and not Operator.Predicate(Value))
 				{
 					++Iterator;
 				}
@@ -416,7 +466,7 @@ namespace Private_ETContainer
 
 		constexpr const ElementType& operator->() const { return Iterator; }
 
-		constexpr ElementType operator*() const { return *Iterator; }
+		constexpr const ElementType& operator*() { return *Iterator; }
 
 		constexpr explicit operator bool() const { return not Iterator; }
 
@@ -449,7 +499,7 @@ namespace Private_ETContainer
 
 		constexpr const ElementType& operator->() const { return Iterator; }
 
-		constexpr ElementType operator*() const { return *Iterator; }
+		constexpr const ElementType& operator*() { return *Iterator; }
 
 		constexpr explicit operator bool() const
 		{