scala案例类复制实现

这是一个给定的例子：

case class Test(s: String,i: Int)

这是过滤掉复制噪声后的输出：

case class Test extends Object with Product with Serializable {
    private[this] val s: String = _;
    def s(): String = Test.this.s;

    private[this] val i: Int = _;
    def i(): Int = Test.this.i;

    def copy(s: String,i: Int): common.Test = new common.Test(s,i);
    def copy$default$1(): String = Test.this.s();
    def copy$default$2(): Int = Test.this.i();
}