001/*
002 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 *  This file is licensed to You under the Eclipse Public License (EPL);
005 *  You may not use this file except in compliance with the License. You
006 *  may obtain a copy of the License at
007 *
008 *      http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 *  See the COPYRIGHT.txt file distributed with this work for information
011 *  regarding copyright ownership.
012 */
013package org.jikesrvm.compilers.opt.regalloc;
014
015import java.util.Comparator;
016import java.util.TreeSet;
017
018abstract class IntervalSet extends TreeSet<BasicInterval> {
019
020  /**
021   * Create an interval set sorted by increasing start or end number
022   *
023   * @param c comparator to use for sorting
024   */
025  IntervalSet(Comparator<BasicInterval> c) {
026    super(c);
027  }
028
029  @Override
030  public String toString() {
031    StringBuilder result = new StringBuilder();
032    for (BasicInterval b : this) {
033      result.append(b);
034      result.append('\n');
035    }
036    return result.toString();
037  }
038}