swift 自定义打印方法

func WPrint(_msg:T,file:String = #file, lineNum:Int = #line) {

    #if DEBUG

    let fileArr = file.components(separatedBy: ["/","."])

    let filename = fileArr[fileArr.endIndex-2];

    print("\(filename)(\(lineNum)): \(msg)");

    #endif

}