TVariant.h File Reference

#include "Templates/Requires.h"
#include "TVariantMeta.h"
#include <type_traits>

Go to the source code of this file.

Classes
struct	TInPlaceType< T >
struct	UE::Core::Private::TUninitializedType< T >
struct	FEmptyVariantState
class	TVariant< T, Ts >

Namespaces
namespace	UE
namespace	UE::Core
namespace	UE::Core::Private
	implementation

Functions
template<typename Func , typename... Variants>
decltype(auto)	Visit (Func &&Callable, Variants &&... Args)
template<typename... Ts>
FArchive &	operator<< (typename UE::Core::Private::TAlwaysFArchive< TVariant< Ts... > >::Type &Ar, TVariant< Ts... > &Variant)

Function Documentation

operator<<()

template<typename... Ts>

FArchive & operator<< ( typename UE::Core::Private::TAlwaysFArchive< TVariant< Ts... > >::Type &  Ar, TVariant< Ts... > &  Variant  )

inline

Serialization function for TVariants.

In order for a TVariant to be serializable, each type in its template parameter pack must:

1. Have a default constructor. This is required because when reading the type from an archive, it must be default constructed before being loaded.
2. Implement the FArchive& operator<<(FArchive&, T&) function. This is required to serialize the actual type that's stored in TVariant.

Visit()

template<typename Func , typename... Variants>

decltype(auto) Visit	(	Func &&	Callable,
		Variants &&...	Args
	)

Apply a visitor function to the list of variants