vrl/value/
btreemap.rs

1/// A macro to easily create a map containing `Value`
2#[macro_export]
3macro_rules! btreemap {
4    () => (::std::collections::BTreeMap::new());
5
6    // trailing comma case
7    ($($key:expr_2021 => $value:expr_2021,)+) => (btreemap!($($key => $value),+));
8
9    ($($key:expr_2021 => $value:expr_2021),*) => {
10        ::std::collections::BTreeMap::from([
11            $(
12                ($key.into(), $value.into()),
13            )*
14        ])
15    };
16}
17
18#[cfg(test)]
19mod tests {
20    #[test]
21    fn test_btreemap() {
22        use std::collections::BTreeMap;
23
24        assert_eq!(btreemap! {}, BTreeMap::<usize, usize>::new());
25
26        let mut map = BTreeMap::new();
27        map.insert(1, "1");
28        assert_eq!(btreemap! { 1 => "1" }, map);
29
30        let mut map = BTreeMap::new();
31        map.insert("1", "one");
32        map.insert("2", "two");
33        assert_eq!(btreemap! { "1" => "one", "2" => "two" }, map);
34    }
35}