file:打印当前文件路径

line:打印当前行号，整数

function:打印当前函数或方法

column :所在的列数

     printSome(lineStr: Int(#line), fileStr: String(#file), funStr: String(#function))

    func printSome(lineStr: Int = #line, fileStr: String = #file, funStr: String = #function) {
        print("line:\(lineStr)  file:\(fileStr)  fun:\(funStr)")
    }