Array.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "Templates/TypeHash.h"
 
#if !COMPILE_WITHOUT_UNREAL_SUPPORT
#include "Containers/Array.h"
#else
#include <vector>
 
template<class T>
class TArray : public std::vector<T>
{
  public:
    TArray()
        : std::vector<T>() {}
    TArray(TArray<T>&& Other)
        : std::vector<T>(std::move(Other)) {}
    TArray(const TArray<T>& Other)
        : std::vector<T>(Other) {}
    TArray(std::initializer_list<T> l)
        : std::vector<T>(l) {}
    void operator=(TArray<T>&& Other)
    {
        std::vector<T>::operator=(std::move(Other));
    }
    void SetNum(const int32 Size)
    {
        std::vector<T>::resize(Size);
    }
    int32 Num() const
    {
        return static_cast<int32>(std::vector<T>::size());
    }
    void Add(const T& Elem)
    {
        std::vector<T>::push_back(Elem);
    }
    void Sort()
    {
        std::sort(begin(), end());
    }
 
    friend uint32 GetTypeHash(const TArray<int32>& Array)
    {
        uint32 Seed = 0;
        for (const auto& Elem : Array)
            Seed ^= GetTypeHash(Elem) + 0x9e3779b9 + (Seed << 6) + (Seed >> 2);
        return Seed;
    }
};
 
namespace std
{
template<>
struct hash<TArray<int32>>
{
    std::size_t operator()(const TArray<int32>& Array) const
    {
        size_t Seed = 0;
        for (const auto& Elem : Array)
            Seed ^= std::hash<int>()(Elem) + 0x9e3779b9 + (Seed << 6) + (Seed >> 2);
        return Seed;
    }
};
}
#endif