ReadFileWithAsyncAwait.swift

class AsyncFileReading {
    func asyncReadFile(_ url: URL) async throws -> Data {
        let (data, _) = try await URLSession.shared.data(from: url)
        return data
    }
    
    static func testout() {
        let instance = AsyncFileReading()
        let filename = "file_to_be_read.txt"
        let url = Bundle.main.bundleURL.appending(component: filename)
        Task {
            let data = try await instance.asyncReadFile(url)
            print(data.count)
        }
    }
}