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[IRC.git] /

package IR.Flat;
import java.util.Vector;

public class FlatNode {
  protected Vector next;
  protected Vector prev;

  public FlatNode() {
    next=new Vector();
    prev=new Vector();
  }

  public String toString() {
    throw new Error(this.getClass().getName() + "does not implement toString!");
  }
  public int numNext() {
    return next.size();
  }
  public FlatNode getNext(int i) {
    return (FlatNode) next.get(i);
  }

  public int numPrev() {
    return prev.size();
  }
  public FlatNode getPrev(int i) {
    return (FlatNode) prev.get(i);
  }

  public void addNext(FlatNode n) {
    next.add(n);
    n.addPrev(this);
  }

  /** This function modifies the graph */
  public void setNext(int i, FlatNode n) {
    FlatNode old=getNext(i);
    next.set(i, n);
    old.prev.remove(this);
    n.addPrev(this);
  }

  protected void addPrev(FlatNode p) {
    prev.add(p);
  }
  public int kind() {
    throw new Error();
  }

  public TempDescriptor [] readsTemps() {
    return new TempDescriptor[0];
  }

  public TempDescriptor [] writesTemps() {
    return new TempDescriptor[0];
  }
}