macro_rules! indexset { ($($value:expr,)+) => { ... }; ($($value:expr),*) => { ... }; }
Create an IndexSet from a list of values
IndexSet
use indexmap::indexset; let set = indexset!{ "a", "b", }; assert!(set.contains("a")); assert!(set.contains("b")); assert!(!set.contains("c")); // "a" is the first value assert_eq!(set.iter().next(), Some(&"a"));