initialize_from_result

array_utils

Function initialize_from_result 

Source 
pub fn initialize_from_result<T, F, E, const OUTPUT_SIZE: usize>(
    f: F,
    fill: T,
) -> ([T; OUTPUT_SIZE], usize)
where
    T: Copy,
    F: Fn(usize) -> Result<T, E>,
Expand description

Initialize a sized array from a closure taking the index and outputting an Result of a element, stopping when the first Err is encountered.

Generates a new sized array generated from generator closure, which turns a index into a Result<T, E> with T being elements of the generated array. If a Err value is found, the rest of the output array is filled with the fill value. Along with the generated array, this utility returns at what index the given Err value was found (OUTPUT_SIZE if not found).

§Examples

use array_utils::initialize_from_result;
assert_eq!(
    initialize_from_result(|index| if index == 5 { Err(()) } else { Ok(index) }, 42),
    ([0, 1, 2, 3, 4, 42, 42, 42], 5)
);

§Panics

Only panics if the given f panics.