Assignment to "enumerated string", is content copied or array information?

[tcak via Digitalmars-d-learn]

enum Values: string{
  NONE = "",
  Value1 = "Apple",
  Value2 = "Peach",
  Value3 = "Lemon"
}

Values lastHeldValue = Value3;


Is the "lastHeldValue" just "pointer + length" information, and it
points to "Lemon"; or is "Lemon" copied to another place in 
memory?

I am doing comparison as "if( lastHeldValue == Value3 )" and am 
not
sure what comparison operation it is doing in the background.