TUniqueFunction | Unreal Engine 4.27 Documentation

Unreal Engine C++ API Reference > Runtime > Core > Templates

Inheritance Hierarchy

TFunctionRefBase
TUniqueFunction

References


Module	Core
Header	/Engine/Source/Runtime/Core/Public/Templates/Function.h
Include	#include "Templates/Function.h"

Syntax

template<typename FuncType>  
class TUniqueFunction : public UE::Core::Private::Function::TFunctionRefBase< UE::Core::Private::Function::TFunctionStorage< true >, FuncType >

Remarks

TUniqueFunction

See the class definition for intended usage.

TUniqueFunction

Used like TFunction above, but is move-only. This allows non-copyable functors to be bound to it.

Example:

TUniquePtr Thing = MakeUnique();

TFunction CopyableFunc = Thing = MoveTemp(Thing){ Thing->DoSomething(); }; // error - lambda is not copyable TUniqueFunction MovableFunc = Thing = MoveTemp(Thing){ Thing->DoSomething(); }; // ok

void Foo(TUniqueFunction Func); Foo(MovableFunc); // error - TUniqueFunction is not copyable Foo(MoveTemp(MovableFunc)); // ok

Constructors

	Type	Name	Description
		TUniqueFunction ( TYPE_OF_NULLPTR )	Default constructor.
		TUniqueFunction ( FunctorType&& InFunc )	Constructor which binds a TFunction to any function object.
		TUniqueFunction ( TFunction< FuncType >&& Other )	Constructor which takes ownership of a TFunction's functor.
		TUniqueFunction ( const TFunction< FuncType >& Other )	Constructor which takes ownership of a TFunction's functor.
		TUniqueFunction ( TUniqueFunction&& )
		TUniqueFunction ( const TUniqueFunction& Other )

Destructors

	Type	Name	Description
		~TUniqueFunction ()

Functions

	Type	Name	Description
	void	Reset ()	Removes any bound callable from the TFunction, restoring it to the default 'empty' state.

Operators

Type	Name	Description
FORCEINLINE	operator bool ()	Tests if the TUniqueFunction is callable.
TUniqueFunction &	operator= ( TUniqueFunction&& Other )	Copy/move assignment operator.
TUniqueFunction &	operator= ( const TUniqueFunction& Other )

Typedefs

Name	Description
Super

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