/******************************************************************************
 * Top contributors (to current version):
 *   Tim King, Mathias Preiner
 *
 * This file is part of the cvc5 project.
 *
 * Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
 * in the top-level source directory and their institutional affiliations.
 * All rights reserved.  See the file COPYING in the top-level source
 * directory for licensing information.
 * ****************************************************************************
 *
 * Utilities for using ostreams.
 */

#include "cvc5_private.h"

#ifndef CVC5__UTIL__OSTREAM_UTIL_H
#define CVC5__UTIL__OSTREAM_UTIL_H

#include <ios>
#include <iosfwd>

namespace cvc5 {

// Saves the formatting of an ostream and restores the previous settings on
// destruction. Example usage:
//   void Foo::Print(std::ostream& out) {
//     StreamFormatScope format_scope(out);
//     out << std::setprecision(6) << bar();
//   }
class StreamFormatScope
{
 public:
  // `out` must outlive StreamFormatScope.
  StreamFormatScope(std::ostream& out);
  ~StreamFormatScope();

 private:
  // Does not own the memory of d_out
  std::ostream& d_out;
  std::ios_base::fmtflags d_format_flags;
  std::streamsize d_precision;
};

}  // namespace cvc5

#endif /* CVC5__UTIL__OSTREAM_UTIL_H */