Error.h

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/*
 *                 Copyright (C) 2017, UChicago Argonne, LLC
 *                            All Rights Reserved
 *
 *           Hardware/Hybrid Cosmology Code (HACC), Version 1.0
 *
 * Salman Habib, Adrian Pope, Hal Finkel, Nicholas Frontiere, Katrin Heitmann,
 *      Vitali Morozov, Jeffrey Emberson, Thomas Uram, Esteban Rangel
 *                        (Argonne National Laboratory)
 *
 *  David Daniel, Patricia Fasel, Chung-Hsing Hsu, Zarija Lukic, James Ahrens
 *                      (Los Alamos National Laboratory)
 *
 *                               George Zagaris
 *                                 (Kitware)
 *
 *                            OPEN SOURCE LICENSE
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#ifndef HACC_ERROR_H
#define HACC_ERROR_H
 
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <string>
 
#include <errno.h>
#include <string.h>
 
namespace hacc {
// Use this class to generate a fatal error, like this:
// Error() << "Something bad happened: " << 5 << " is not " << 6;
// which will format a string and throw a std::runtime_error.
class Error {
public:
  Error(bool UseErrno = false) : SysError(0) {
    if (UseErrno)
      SysError = strerror(errno);
  }
 
  ~Error() {
    if (SysError)
      SS << ": " << SysError;
 
    throw std::runtime_error(SS.str());
  }
 
  template <typename T>
  Error &operator << (const T &Value) {
    SS << Value;
    return *this;
  }
 
protected:
  std::stringstream SS;
  const char *SysError;
};
} // namespace hacc
 
#endif // HACC_ERROR_H