scala - Creating a parent type to multiple enumeration objects -

i want create multiple enumeration objects, inheriting 1 parent. reason why want them inheriting 1 parent want create collection of enumerations objects , group them under type.

object searchable{   trait searchflags{       self: enumeration =>        type value = self.value   } }  object searchablebylocation{     object searchflags extends enumeration{        val flag1 = value     } }  object searchablebyage{     object searchflags extends enumeration{        val flag1 = value     } }  object test extends app{   //i cannot refer members of trait directly,    //underlying type of set invalid   val flags: set[ searchable.searchflags.value ] = set( searchablebylocation.searchflags.flag1, searchablebyage.searchflags.flag1 ) } 

how go achieving this?

well, scala's enumeration objects nothing more series of values of shared type. need create common trait , guarantee constants of type. works:

  trait commonbase    object enum1 extends enumeration   {     protected class enum1val extends val commonbase     protected final def enum1value() = new enum1val()      val a, b, c = enum1value()   }    object enum2 extends enumeration   {     protected class enum2val extends val commonbase     protected final def enum2value() = new enum2val()      val d, e, f = enum2value()   }    def main(args: array[string]): unit = {     val flags: set[ commonbase ] = set( enum1.a, enum2.d )   } 

of course, need create own value type , own factory method produce new type instead of default type comes enumeration.