Macro slice 

macro_rules! slice {
    ([] $t:ty { $($x:expr),* $(,)? }) => { ... };
    ($t:ty ; $($x:expr),* $(,)?) => { ... };
    ($($x:expr),* $(,)?) => { ... };
}

Three forms — pick the one closest to your Go original:

slice!([]string{“a”, “b”}) // Go-shaped: []T{…} slice![string; “a”, “b”] // typed: T; values slice![1, 2, 3] // untyped: just values (vec! alias)

The typed and Go-shaped forms call .into() on each element so &str literals become string, i32 literals widen to int64, etc.