SCALA 隐式转换报错：No implicit view available from com.m24.learn.base.generic.Person => Ordered[com.m24.learn.base.generic.Person]. val comp = new CompareComm(p1, p2)

原代码如下：

class Person(val name: String, val age: Int) {
    override def toString: String = this.name + " " + this.age
}

object MyImplicit {
    implicit def personToOrdered(p: Person)  = new Ordered[Person] {
        override def compare(that: Person): Int = {
            p.age - that.age
        }
    }
}

隐式转换已引入，报错信息如上所述：

问题修改是将隐式转换函数定义时，显式定义返回类型：

implicit def personToOrdered(p: Person) : Ordered[Person] = new Ordered[Person] {
        override def compare(that: Person): Int = {
            p.age - that.age
        }
}