Function float_to_decimal_opt 

pub fn float_to_decimal_opt<D>(
    input: f64,
    precision: u8,
    scale: i8,
) -> Option<<D as ArrowPrimitiveType>::Native>
where
    D: DecimalType,
    <D as ArrowPrimitiveType>::Native: DecimalCast,

Like float_to_decimal, but returns None on failure. With valid precision and scale, conversion failures do not allocate an error message.

use arrow_array::types::Decimal32Type;
use arrow_cast::cast::float_to_decimal_opt;

assert_eq!(float_to_decimal_opt::<Decimal32Type>(12.345, 5, 2), Some(1235));
assert_eq!(float_to_decimal_opt::<Decimal32Type>(12345.678, 5, 2), None);