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# NSString.EnumerationOptions

Constants to specify kinds of substrings and styles of enumeration.

```
struct EnumerationOptions
```

## Overview

These options are used with the [`enumerateSubstrings(in:options:using:)`](/documentation/Foundation/NSString/enumerateSubstrings(in:options:using:)) method. Pass in one `NSStringEnumerationBy...` option and combine with any of the remaining enumeration style constants using the C bitwise `OR` operator.

## Topics

### Constants

[`NSStringEnumerationByLines`](/documentation/Foundation/NSString/EnumerationOptions/byLines)

[`NSStringEnumerationByParagraphs`](/documentation/Foundation/NSString/EnumerationOptions/byParagraphs)

[`NSStringEnumerationByComposedCharacterSequences`](/documentation/Foundation/NSString/EnumerationOptions/byComposedCharacterSequences)

[`NSStringEnumerationByWords`](/documentation/Foundation/NSString/EnumerationOptions/byWords)

[`NSStringEnumerationBySentences`](/documentation/Foundation/NSString/EnumerationOptions/bySentences)

[`NSStringEnumerationReverse`](/documentation/Foundation/NSString/EnumerationOptions/reverse)

[`NSStringEnumerationSubstringNotRequired`](/documentation/Foundation/NSString/EnumerationOptions/substringNotRequired)

[`NSStringEnumerationLocalized`](/documentation/Foundation/NSString/EnumerationOptions/localized)

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`OptionSet`](/documentation/Swift/OptionSet)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

[`ExpressibleByArrayLiteral`](/documentation/Swift/ExpressibleByArrayLiteral)

[`Sendable`](/documentation/Swift/Sendable)

[`Equatable`](/documentation/Swift/Equatable)

[`SetAlgebra`](/documentation/Swift/SetAlgebra)

---

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