Swift "async throws" to "async Result" https://twitter.com/inamiy/status/1433055765946798082

async-throws-to-async-result.swift

func asyncThrowsToAsyncResult<A, B>(_ f: @escaping (A) async throws -> B) 
    -> (A) async -> Result<B, Error> 
{
    { a in
        do {
            return .success(try await f(a))
        } catch {
            return .failure(error)
        }
    }
}

func asyncResultToAsyncThrows<A, B>(_ f: @escaping (A) async -> Result<B, Error>) 
    -> (A) async throws -> B 
{
    { a in
        switch await f(a) {
        case let .success(success):
            return success
        case let .failure(error):
            throw error
        }
    }
}