---
title: "CFStringGetRangeOfComposedCharactersAtIndex(_:_:)"
framework: corefoundation
role: symbol
role_heading: Function
path: "corefoundation/cfstringgetrangeofcomposedcharactersatindex(_:_:)"
---

# CFStringGetRangeOfComposedCharactersAtIndex(_:_:)

Returns the range of the composed character sequence at a specified index.

## Declaration

```swift
func CFStringGetRangeOfComposedCharactersAtIndex(_ theString: CFString!, _ theIndex: CFIndex) -> CFRange
```

## Parameters

- `theString`: The string to examine.
- `theIndex`: The index of the character contained in the composed character sequence. If the index is outside the range of the string (0 to N-1 inclusive, where N is the length of the string), the behavior is undefined.

## Return Value

Return Value The range of the composed character sequence.

## Discussion

Discussion A composed character sequence is a series of one or more characters where each is a combining character, zero-width joiner or non-joiner, voiced mark, or enclosing mark, optionally including a base character.

## See Also

### Accessing Characters

- [CFStringCreateExternalRepresentation(_:_:_:_:)](corefoundation/cfstringcreateexternalrepresentation(_:_:_:_:).md)
- [CFStringGetBytes(_:_:_:_:_:_:_:_:)](corefoundation/cfstringgetbytes(_:_:_:_:_:_:_:_:).md)
- [CFStringGetCharacterAtIndex(_:_:)](corefoundation/cfstringgetcharacteratindex(_:_:).md)
- [CFStringGetCharacters(_:_:_:)](corefoundation/cfstringgetcharacters(_:_:_:).md)
- [CFStringGetCharactersPtr(_:)](corefoundation/cfstringgetcharactersptr(_:).md)
- [CFStringGetCharacterFromInlineBuffer(_:_:)](corefoundation/cfstringgetcharacterfrominlinebuffer(_:_:).md)
- [CFStringGetCString(_:_:_:_:)](corefoundation/cfstringgetcstring(_:_:_:_:).md)
- [CFStringGetCStringPtr(_:_:)](corefoundation/cfstringgetcstringptr(_:_:).md)
- [CFStringGetLength(_:)](corefoundation/cfstringgetlength(_:).md)
- [CFStringGetPascalString(_:_:_:_:)](corefoundation/cfstringgetpascalstring(_:_:_:_:).md)
- [CFStringGetPascalStringPtr(_:_:)](corefoundation/cfstringgetpascalstringptr(_:_:).md)
- [CFStringInitInlineBuffer(_:_:_:)](corefoundation/cfstringinitinlinebuffer(_:_:_:).md)