TypedElementQueryFunctionArgumentTypes.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/ArrayView.h"
 
namespace UE::Editor::DataStorage::Queries
{
     // Forward declarations.
    namespace Private
    {
        template<typename... Args>
        struct TArgumentInfo;
    }
 
    enum class EFlowControl
    {
        Continue, 
        Break 
    };
 
    template<typename ResultType>
    struct TResult
    {
        virtual void Add(ResultType ResultValue) = 0;
    };
    template<> struct TResult<void>{}; // Used as a placeholder for internal use.
 
    template<typename T>
    class TBatch
    {
        template<typename... Args>
        friend struct Private::TArgumentInfo;
 
    public:
        TBatch() = default;
 
        TArrayView<T> GetView(int32 BatchSize) { return TArrayView<T>(Values, BatchSize); };
        
        T* GetData() { return Values; }
        const T* GetData() const { return Values; }
 
    private:
        TBatch(T* Values) : Values(Values) {}
        TBatch& operator=(T* InValues) { Values = InValues; return *this; }
 
        T* Values = nullptr;
    };
 
    template<typename T>
    using TConstBatch = TBatch<const T>;
} // namespace UE::Editor::DataStorage::Queries