Known issues

Duplicate function names

Problem

Functions with the same opening function name but distinct signatures via different parameter names will conflict.

For example, the two functions below:

func data(for request: URLRequest) async throws -> (Data, URLResponse)
func data(from url: URL) async throws -> (Data, URLResponse)

Will be expanded to:

var _data: (URLRequest) async throws -> (Data, URLResponse)
var _data: (URL) async throws -> (Data, URLResponse)

which will conflict because the two property names _data are the same and will throw a compiler error:

❌ Invalid redeclaration of '_data'

Workaround

Distinguish the function's opening names explicitly, eg, the above example can be turned in to:

func dataForRequest(_ request: URLRequest) async throws -> (Data, URLResponse)
func dataFromURL(_ url: URL) async throws -> (Data, URLResponse)

Which is expanded to:

var _dataForRequest: (URLRequest) async throws -> (Data, URLResponse)
var _dataFromURL: (URL) async throws -> (Data, URLResponse)

And leaves a happy compiler 🤖