Method string_view substring

include/ada/helpers.h:107–118

* @private * Return the substring from input going from index pos1 to the pos2 (non * included). The length of the substring is pos2 - pos1. */

 * included). The length of the substring is pos2 - pos1.
 */
ada_really_inline constexpr std::string_view substring(std::string_view input,
                                                       size_t pos1,
                                                       size_t pos2) {
#if ADA_DEVELOPMENT_CHECKS
  if (pos2 < pos1) {
    std::cerr << "Negative-length substring: [" << pos1 << " to " << pos2 << ")"
              << std::endl;
    abort();
  }
#endif
  return input.substr(pos1, pos2 - pos1);
}

/**
 * @private