absinthe_strategy.h

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// Author(s): Wieger Wesselink
// Copyright: see the accompanying file COPYING or copy at
// https://github.com/mCRL2org/mCRL2/blob/master/COPYING
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
/// \file mcrl2/pbes/absinthe_strategy.h
/// \brief add your file description here.
 
#ifndef MCRL2_PBES_ABSINTHE_STRATEGY_H
#define MCRL2_PBES_ABSINTHE_STRATEGY_H
 
#include "mcrl2/utilities/exception.h"
#include <string>
 
namespace mcrl2::pbes_system {
 
/// The approximation strategies of the absinthe tool.
enum absinthe_strategy
{
  absinthe_over,
  absinthe_under
};
 
/// \brief Parses an absinthe strategy
inline
absinthe_strategy parse_absinthe_strategy(const std::string& strategy)
{
  if (strategy == "over")
  {
    return absinthe_over;
  }
  else if (strategy == "under")
  {
    return absinthe_under;
  }
  else
  {
    throw mcrl2::runtime_error("unknown approximation strategy specified (got `" + strategy + "')");
  }
}
 
/// \brief Prints an absinthe strategy
inline
std::string print_absinthe_strategy(const absinthe_strategy strategy)
{
  switch (strategy)
  {
    case absinthe_over:
      return "over";
    case absinthe_under:
      return "under";
  }
  throw mcrl2::runtime_error("unknown absinthe strategy");
}
 
inline
std::istream& operator>>(std::istream& is, absinthe_strategy& strategy)
{
  try
  {
    std::string s;
    is >> s;
    strategy = parse_absinthe_strategy(s);
  }
  catch(mcrl2::runtime_error&)
  {
    is.setstate(std::ios_base::failbit);
  }
  return is;
}
 
inline
std::ostream& operator <<(std::ostream& os, const absinthe_strategy strategy)
{
  os << print_absinthe_strategy(strategy);
  return os;
}
 
/// \brief Prints an absinthe strategy
inline
std::string description(const absinthe_strategy strategy)
{
  switch (strategy)
  {
    case absinthe_over:
      return "an over-approximation";
    case absinthe_under:
      return "an under-approximation";
  }
  throw mcrl2::runtime_error("unknown absinthe strategy");
}
 
} // namespace mcrl2::pbes_system
 
 
 
#endif // MCRL2_PBES_ABSINTHE_STRATEGY_H