ArrayBuilder.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Containers/ContainerAllocationPolicies.h"
#include "Containers/Array.h"
 
template<typename ElementType, typename Allocator = FDefaultAllocator> class TArrayBuilder
{
public:
 
    TArrayBuilder() { }
 
    template<typename OtherAllocator> TArrayBuilder( const TArray<ElementType, OtherAllocator>& InArray )
        : Array(InArray)
    { }
 
public:
 
    TArrayBuilder& Add( const ElementType& Item )
    {
        Array.Add(Item);
 
        return *this;
    }
 
    TArrayBuilder& AddUnique( const ElementType& Item )
    {
        Array.AddUnique(Item);
 
        return *this;
    }
 
    template<typename OtherAllocator> TArrayBuilder& Append( const TArray<ElementType, OtherAllocator>& OtherArray )
    {
        Array.Append(OtherArray);
 
        return *this;
    }
 
public:
 
    TArray<ElementType, Allocator> Build()
    {
        return Array;
    }
 
    operator TArray<ElementType, Allocator>()
    {
        return Build();
    }
 
private:
 
    TArray<ElementType, Allocator> Array;
};