Macro array_arange

macro_rules! array_arange {
    (Tuple2<$t1:ty, $t2:ty>, $($tt:tt)*) => { ... };
    (Tuple3<$t1:ty, $t2:ty, $t3:ty>, $($tt:tt)*) => { ... };
    (List<$t1:ty>, $($tt:tt)*) => { ... };
    (char, $($tt:tt)*) => { ... };
    (String, $($tt:tt)*) => { ... };
    ($tt:ty, $n:expr, $m:expr) => { ... };
    ($tt:ty, $n:expr, $m:expr, $k:expr) => { ... };
}

Create new 2d array with ones on the diagonal and zeros elsewhere

Examples

use arr_rs::prelude::*;

let arr = array_arange!(i32, 0, 4).unwrap();
assert_eq!(array!(i32, [0, 1, 2, 3, 4]).unwrap(), arr);
let arr = array_arange!(i32, 0, 7, 2).unwrap();
assert_eq!(array!(i32, [0, 2, 4, 6]).unwrap(), arr);