---
title: "replacing(_:subrange:maxReplacements:with:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/rangereplaceablecollection/replacing(_:subrange:maxreplacements:with:)"
---

# replacing(_:subrange:maxReplacements:with:)

Returns a new collection in which all occurrences of a sequence matching the given regex are replaced by another regex match.

## Declaration

```swift
func replacing<Output, Replacement>(_ regex: some RegexComponent, subrange: Range<Self.Index>, maxReplacements: Int = .max, with replacement: (Regex<Output>.Match) throws -> Replacement) rethrows -> Self where Replacement : Collection, Replacement.Element == Character
```

## Parameters

- `regex`: A regex describing the sequence to replace.
- `subrange`: The range in the collection in which to search for regex.
- `maxReplacements`: A number specifying how many occurrences of the sequence matching regex to replace. Default is Int.max.
- `replacement`: A closure that receives the full match information, including captures, and returns a replacement collection.

## Return Value

Return Value A new collection in which all occurrences of subsequence matching regex are replaced by replacement.