now we make error if we deal with leading zeros in decimal value , type_precision >= precision will make value overflow and DCHECK will fail , so if here has leading zero we should only make type_precision > precision to make value right
now we make error if we deal with leading zeros in decimal value , type_precision >= precision will make value overflow and DCHECK will fail , so if here has leading zero we should only make type_precision > precision to make value right