---
title: NSEnumerationOptions
framework: foundation
role: symbol
role_heading: Structure
path: foundation/nsenumerationoptions
---

# NSEnumerationOptions

Options for block enumeration operations.

## Declaration

```swift
struct NSEnumerationOptions
```

## Topics

### Constants

- [concurrent](foundation/nsenumerationoptions/concurrent.md)
- [reverse](foundation/nsenumerationoptions/reverse.md)

### Initializers

- [init(rawValue:)](foundation/nsenumerationoptions/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [ExpressibleByArrayLiteral](swift/expressiblebyarrayliteral.md)
- [OptionSet](swift/optionset.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [SetAlgebra](swift/setalgebra.md)

## See Also

### Iteration

- [NSEnumerator](foundation/nsenumerator.md)
- [NSFastEnumeration](foundation/nsfastenumeration.md)
- [NSFastEnumerationIterator](foundation/nsfastenumerationiterator.md)
- [NSIndexSetIterator](foundation/nsindexsetiterator.md)
- [NSSortOptions](foundation/nssortoptions.md)