public LiteralList(LiteralList previous, LiteralToken value): this(previous, null, value) {}
public LiteralList(LiteralList previous, LiteralToken name, LiteralToken value) {
Debug.Assert(value != null);
this.previous = previous;
this.name = (name != null) ? name.Value : null;
this.value = value.Value;
}
public LiteralList(LiteralToken value): this(null, null, value) {}