PropertyPathFunctions.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Templates/SharedPointerFwd.h"
 
#define UE_API COREUOBJECT_API
 
class FName;
class FProperty;
class UObject;
class UStruct;
struct FPropertyChangedChainEvent;
class FEditPropertyChain;
 
namespace UE { class FPropertyPathName; }
namespace UE { class FPropertyTypeName; }
 
namespace UE
{
 
UE_API extern const FName NAME_Key;
UE_API extern const FName NAME_Value;
 
UE_API FProperty* FindPropertyByNameAndTypeName(const UStruct* Struct, FName Name, FPropertyTypeName TypeName);
 
struct FPropertyValueInContainer
{
    const FProperty* Property = nullptr;
    const UStruct* Struct = nullptr;
    void* Container = nullptr;
    int32 ArrayIndex = INDEX_NONE;
 
    inline explicit operator bool() const
    {
        return !!Property;
    }
 
    template <typename ValueType>
    inline ValueType* GetValuePtr() const
    {
        // A lambda template allows this to be defined with only a forward declaration of FProperty.
        return [this]<typename PropertyType>(PropertyType* P)
        {
            return P->template ContainerPtrToValuePtr<ValueType>(Container, ArrayIndex);
        }(Property);
    }
 
    inline bool IsDynamicContainerElement() const
    {
        return Struct == nullptr;
    }
};
 
UE_API FPropertyValueInContainer TryResolvePropertyPath(const FPropertyPathName& Path, UObject* Object);
 
UE_API FPropertyValueInContainer TryResolvePropertyPathForChangeEvent(const FPropertyPathName& Path, UObject* Object, uint32 ChangeType, TSharedPtr<FPropertyChangedChainEvent>& OutEvent, FEditPropertyChain& OutChain);
 
} // UE
 
#undef UE_API