RoundingModeGuard.hpp

 
#pragma once
 
#include <cfenv>
 
namespace dlinear {
 
class RoundingModeGuard {
 public:
  explicit RoundingModeGuard(int new_round) : round_mode_{fegetround()} { fesetround(new_round); }
 
  RoundingModeGuard(const RoundingModeGuard &) = delete;
  RoundingModeGuard(RoundingModeGuard &&) = delete;
  RoundingModeGuard &operator=(const RoundingModeGuard &) = delete;
  RoundingModeGuard &operator=(RoundingModeGuard &&) = delete;
 
  ~RoundingModeGuard() { fesetround(round_mode_); }
 
 private:
  const int round_mode_{};  
};
 
}  // namespace dlinear