Macro im::get_in

macro_rules! get_in {
    ($target:expr, $path:expr => $($tail:tt) => * ) => { ... };
    ($target:expr, $path:expr) => { ... };
}

Get a value inside multiple levels of data structures.

This macro takes a Vector, OrdMap or HashMap, along with a key or a series of keys, and returns the value at the location inside the data structure described by the key sequence, or None if any of the keys didn’t exist.

Examples

let vec_inside_vec = vector![vector![1, 2, 3], vector![4, 5, 6]];

assert_eq!(Some(&6), get_in![vec_inside_vec, 1 => 2]);