# function() Produces the name of the declaration in which it appears. ``` @freestanding(expression) macro function() -> T where T : ExpressibleByStringLiteral ``` ## Overview Inside a function, the value `#function` produces is the name of that function, inside a method it’s the name of that method, inside a property getter or setter it’s the name of that property, inside special members like `init` or `subscript` it’s the name of that keyword, and at the top level of a file it’s the name of the current module. When used as the default value of a function or method parameter, this macro’s value is determined when the default value expression is evaluated at the call site. For example: ```swift func logFunctionName(string: String = #function) { print(string) } func myFunction() { logFunctionName() // Prints "myFunction()". } ``` --- 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)