# file() Produces the path to the file in which it appears. ``` @freestanding(expression) macro file() -> T where T : ExpressibleByStringLiteral ``` ## Overview The string value from `#file` depends on the language version, to enable migration from the old `#filePath` behavior to the new `#fileID` behavior. Currently, `#file` has the same value as `#filePath`. In a future version of Swift, `#file` will have the same value as `#fileID` instead. To adopt the future behavior, replace `#file` with `#fileID` or `#filePath` as appropriate. This macro’s value can be changed by `#sourceLocation`, as described in [Line Control Statement](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/statements#Line-Control-Statement) in [The Swift Programming Language](https://docs.swift.org/swift-book/). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)