throw std::system_error with errno values quickly

throwerrno.h

#ifndef THROW_ERRNO_H
#define THROW_ERRNO_H

#include <cerrno>
#include <string>
#include <system_error>

[[noreturn]]
inline void throw_errno() {
  throw std::system_error(errno, std::system_category());
}

[[noreturn]]
inline void throw_errno(const std::string& msg) {
  throw std::system_error(errno, std::system_category(), msg);
}

[[noreturn]]
inline void throw_errno(int ev) {
  throw std::system_error(ev, std::system_category());
}

[[noreturn]]
inline void throw_errno(int ev, const std::string& msg) {
  throw std::system_error(ev, std::system_category(), msg);
}

#endif // THROW_ERRNO_H