---
title: "consuming(_:startingAt:in:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/date/iso8601formatstyle/consuming(_:startingat:in:)"
---

# consuming(_:startingAt:in:)

## Declaration

```swift
func consuming(_ input: String, startingAt index: String.Index, in bounds: Range<String.Index>) throws -> (upperBound: String.Index, output: Date)?
```