Macro assert_duplicates

macro_rules! assert_duplicates {
    ($iter:expr) => { ... };
    ($iter:expr, $($msg:tt)+) => { ... };
}

Asserts that the input contains at least one duplicate.

Example

use quantor::assert_duplicates;
 
let numbers = vec!(0, 0, 1, 2);
 
assert_duplicates!(&numbers);