MapBuilder.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Containers/ContainerAllocationPolicies.h"
#include "Containers/Map.h"
 
template<typename KeyType, typename ValueType, typename SetAllocator = FDefaultSetAllocator> class TMapBuilder
{
public:
 
    [[nodiscard]] TMapBuilder()
    {
    }
 
    template<typename OtherAllocator>
    [[nodiscard]] TMapBuilder( const TMap<KeyType, ValueType, OtherAllocator>& InMap )
        : Map(InMap)
    {
    }
 
public:
 
    TMapBuilder& Add( KeyType InKey, ValueType InValue )
    {
        Map.Add(InKey, InValue);
 
        return *this;
    }
 
    TMapBuilder& Append( const TMap<KeyType, ValueType, SetAllocator>& OtherMap )
    {
        Map.Append(OtherMap);
 
        return *this;
    }
 
public:
 
    [[nodiscard]] TMap<KeyType, ValueType, SetAllocator> Build()
    {
        return Map;
    }
 
    [[nodiscard]] operator TMap<KeyType, ValueType, SetAllocator>()
    {
        return Build();
    }
 
private:
 
    TMap<KeyType, ValueType, SetAllocator> Map;
};