ReverseIterate.h File Reference

#include "HAL/Platform.h"
#include <iterator>

Go to the source code of this file.

Classes
struct	TReversePointerIterator< T >

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

Functions
template<typename RangeType >
constexpr UE::Core::Private::TReverseIterationAdapter< RangeType >	ReverseIterate (RangeType &&Range UE_LIFETIMEBOUND)

Function Documentation

ReverseIterate()

template<typename RangeType >

constexpr UE::Core::Private::TReverseIterationAdapter< RangeType > ReverseIterate ( RangeType &&Range  UE_LIFETIMEBOUND )

inlineconstexpr

Allows a range to be iterated backwards. The container must not be modified during iteration, but elements may be. The container must outlive the adapter.

Parameters

Range

The range to iterate over backwards.

Returns

An adapter which allows reverse iteration over the range. The adapter is not intended to be handled directly, but rather as a parameter to an algorithm or ranged-for loop.

Example:

TArray<int> Array = { 1, 2, 3, 4, 5 };

for (int& Element : ReverseIterate(Array)) { UE_LOG(LogTemp, Log, TEXT("%d"), Element); } // Logs: 5 4 3 2 1

TArray<FString> Output; Algo::Transform(ReverseIterate(Array), Output, UE_PROJECTION(LexToString)); // Output: [ "5", "4", "3", "2", "1" ]