Performs addition that returns None instead of wrapping around on overflow.

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Signature

pub trait CheckedAdd

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Examples

use core::num::traits::CheckedAdd;

let result = 1_u8.checked_add(2);
assert!(result == Some(3));

let result = 255_u8.checked_add(1);
assert!(result == None); // Overflow

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Trait functions

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checked_add

Adds two numbers, checking for overflow. If overflow happens, None is returned.

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Signature

fn checked_add(self: T, v: T) -> Option