scala for循环 带条件过滤

case class Student(name:String,isMale:Boolean,children:Student*)
object test2{
  def main(args: Array[String]): Unit = {
    val lauren = Student("lauren",false)   
    val rocky = Student("Rocky",true)
    val vivican = Student("vivican",false,lauren,rocky)
    val students = List(lauren,rocky,vivican)
    val forResult = for{
                      student<-students;
                      name=student.name;
                      if !student.isMale;child<-student.children}
      yield (student.name,child.name)
      println(forResult)
  }
}