Method if

src/toml.hpp:13998–14007

						set_error_and_return_default("expected exponent digit, saw '"sv, to_sv(*cp), "'"sv);
				}
				else if (is_decimal_digit(*cp))
				{
					if (!seen_decimal)
					{
						if (!first_integer_part)
							first_integer_part = static_cast<char>(cp->bytes[0]);
						else if (first_integer_part == '0')
							set_error_and_return_default("leading zeroes are prohibited"sv);
					}
				}
				else
					set_error_and_return_default("expected decimal digit, saw '"sv, to_sv(*cp), "'"sv);