Function num_traits::pow::checked_pow

pub fn checked_pow<T: Clone + One + CheckedMul>(base: T,
                                                exp: usize)
                                                -> Option<T>

Raises a value to the power of exp, returning None if an overflow occurred.

Otherwise same as the pow function.

Example

use num_traits::checked_pow;

assert_eq!(checked_pow(2i8, 4), Some(16));
assert_eq!(checked_pow(7i8, 8), None);
assert_eq!(checked_pow(7u32, 8), Some(5_764_801));