EnumSelection.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include "neml2/misc/error.h"
 
#include <string>
#include <vector>
#include <unordered_map>
#include <set>
 
namespace neml2
{
// Forward decl
class EnumSelection;
std::ostream & operator<<(std::ostream &, const EnumSelection &);
std::stringstream & operator>>(std::stringstream &, EnumSelection &);
 
class EnumSelection
{
public:
  EnumSelection() = default;
  EnumSelection(const EnumSelection & other);
  EnumSelection(const std::vector<std::string> & candidates, const std::string & selection);
  EnumSelection(const std::vector<std::string> & candidates,
                const std::vector<int> & values,
                const std::string & selection);
 
  EnumSelection & operator=(const EnumSelection & other);
 
  friend std::stringstream & operator>>(std::stringstream & ss, EnumSelection &);
 
  bool operator==(const EnumSelection & other) const;
 
  bool operator!=(const EnumSelection & other) const;
 
  operator std::string() const { return _selection; }
 
  operator int() const { return _value; }
 
  const std::unordered_map<std::string, int> & candidates() const { return _values; }
 
  std::string candidates_str() const;
 
  template <typename T>
  T as() const
  {
    return static_cast<T>(_value);
  }
 
private:
  std::unordered_map<std::string, int> _values;
 
  std::string _selection;
 
  int _value;
};
 
} // namespace neml2