Function parse_decimal_native 

fn parse_decimal_native<T: DecimalType>(
    s: &str,
    scale: i8,
) -> Result<(T::Native, usize), DecimalParseError>

Parses s as a decimal with the given scale into the native type of T, checking only that the result fits the native type (not the precision), and returns it with an upper bound on its number of decimal digits.

See parse_decimal for the accepted syntax and rounding behaviour.