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diff --git a/src/util/statistics.h b/src/util/statistics.h
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+/*********************                                                        */
+/*! \file statistics.h
+ ** \verbatim
+ ** Original author: mdeters
+ ** Major contributors: none
+ ** Minor contributors (to current version): none
+ ** This file is part of the CVC4 prototype.
+ ** Copyright (c) 2009-2012  The Analysis of Computer Systems Group (ACSys)
+ ** Courant Institute of Mathematical Sciences
+ ** New York University
+ ** See the file COPYING in the top-level source directory for licensing
+ ** information.\endverbatim
+ **
+ ** \brief [[ Add one-line brief description here ]]
+ **
+ ** [[ Add lengthier description here ]]
+ ** \todo document this file
+ **/
+
+#include "cvc4_public.h"
+
+#ifndef __CVC4__STATISTICS_H
+#define __CVC4__STATISTICS_H
+
+#include "util/sexpr.h"
+
+#include <string>
+#include <ostream>
+#include <set>
+#include <iterator>
+#include <utility>
+
+namespace CVC4 {
+
+class Stat;
+
+class CVC4_PUBLIC StatisticsBase {
+protected:
+
+  static std::string s_regDelim;
+
+  /** A helper class for comparing two statistics */
+  struct StatCmp {
+    bool operator()(const Stat* s1, const Stat* s2) const;
+  };/* struct StatisticsRegistry::StatCmp */
+
+  /** A type for a set of statistics */
+  typedef std::set< Stat*, StatCmp > StatSet;
+
+  std::string d_prefix;
+
+  /** The set of statistics in this object */
+  StatSet d_stats;
+
+  StatisticsBase();
+  StatisticsBase(const StatisticsBase& stats);
+  StatisticsBase& operator=(const StatisticsBase& stats);
+
+public:
+
+  virtual ~StatisticsBase() { }
+
+  class CVC4_PUBLIC iterator : public std::iterator< std::input_iterator_tag, std::pair<std::string, SExpr> > {
+    StatSet::iterator d_it;
+
+    iterator(StatSet::iterator it) : d_it(it) { }
+
+    friend class StatisticsBase;
+
+  public:
+    value_type operator*() const;
+    iterator& operator++() { ++d_it; return *this; }
+    iterator operator++(int) { iterator old = *this; ++d_it; return old; }
+    bool operator==(const iterator& i) const { return d_it == i.d_it; }
+    bool operator!=(const iterator& i) const { return d_it != i.d_it; }
+  };/* class StatisticsBase::iterator */
+
+  /** An iterator type over a set of statistics. */
+  typedef iterator const_iterator;
+
+  /** Set the output prefix for this set of statistics. */
+  virtual void setPrefix(const std::string& prefix);
+
+  /** Flush all statistics to the given output stream. */
+  void flushInformation(std::ostream& out) const;
+
+  /** Get the value of a named statistic. */
+  SExpr getStatistic(std::string name) const;
+
+  /**
+   * Get an iterator to the beginning of the range of the set of
+   * statistics.
+   */
+  const_iterator begin() const;
+
+  /**
+   * Get an iterator to the end of the range of the set of statistics.
+   */
+  const_iterator end() const;
+
+};/* class StatisticsBase */
+
+class CVC4_PUBLIC Statistics : public StatisticsBase {
+  void clear();
+  void copyFrom(const StatisticsBase&);
+
+public:
+
+  /**
+   * Override the copy constructor to do a "deep" copy of statistics
+   * values.
+   */
+  Statistics(const StatisticsBase& stats);
+  Statistics(const Statistics& stats);
+
+  ~Statistics();
+
+  /**
+   * Override the assignment operator to do a "deep" copy of statistics
+   * values.
+   */
+  Statistics& operator=(const StatisticsBase& stats);
+  Statistics& operator=(const Statistics& stats);
+
+};/* class Statistics */
+
+}/* CVC4 namespace */
+
+#endif /* __CVC4__STATISTICS_H */