FormatFlag.hh

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#ifndef FORMATFLAG_HH
#define FORMATFLAG_HH
 
#include <iostream>
 
namespace CASM {
 
class FormatFlag {
 public:
  enum Value {
    cart = 0,
    va_off = 0,
    header_on = 0,
    frac = (1u << 0),
    va_on = (1u << 1),
    header_off = (1u << 2)
    // add up to (1u << 7)
  };
 
  FormatFlag(int _value) : m_value(_value) {}
 
  FormatFlag(std::ostream &_stream) : m_value(_stream.iword(iword_index())) {}
 
  int value() const { return m_value; }
 
  std::ostream &set(std::ostream &_stream) const {
    _stream.iword(iword_index()) = value();
    return _stream;
  }
 
  bool print_header() const { return !bool(m_value & header_off); }
 
  FormatFlag &print_header(bool _set) {
    if (_set)
      m_value &= ~header_off;
    else
      m_value |= header_off;
    return *this;
  }
 
  bool print_va() const { return bool(m_value & va_on); }
 
  FormatFlag operator|(int RHS) {
    FormatFlag tflag(*this);
    return tflag |= RHS;
  }
 
  FormatFlag operator^(int RHS) {
    FormatFlag tflag(*this);
    return tflag ^= RHS;
  }
 
  FormatFlag operator&(int RHS) {
    FormatFlag tflag(*this);
    return tflag &= RHS;
  }
 
  FormatFlag &operator|=(int RHS) {
    m_value |= RHS;
    return *this;
  }
 
  FormatFlag &operator^=(int RHS) {
    m_value ^= RHS;
    return *this;
  }
 
  FormatFlag &operator&=(int RHS) {
    m_value &= RHS;
    return *this;
  }
 
 private:
  static int iword_index();
  int m_value;
};
 
std::ostream &operator<<(std::ostream &_stream, const FormatFlag &flag);
 
}  // namespace CASM
#endif