Function IntFromChars

libraries/lib-string-utils/FromChars.cpp:125–150

template <typename ResultType>
FromCharsResult
IntFromChars(const char* buffer, const char* last, ResultType& value) noexcept
{
   const char* origin = buffer;

   if (buffer >= last)
      return { buffer, std::errc::invalid_argument };

   const bool isNegative = *buffer == '-';

   if (isNegative)
   {
      if constexpr (std::is_signed_v<ResultType>)
         ++buffer;
      else
         return { origin, std::errc::invalid_argument };
   }

   const auto fastStringResult =
      FastStringToInt(buffer, last, value, isNegative);

   if (fastStringResult.ec == std::errc::invalid_argument)
      return { origin, std::errc::invalid_argument };

   return fastStringResult;
}
} // namespace

FromCharsResult FromChars(const char* buffer, const char* last, float& value) noexcept