Would `Vec::into_boxed_slice` [1] be the answer here? It gives you a `Box<[Foo]>`, which doesn't have a capacity (it still knows its own length). 1: https://do

Would `Vec::into_boxed_slice` [1] be the answer here? It gives you a `Box<[Foo]>`, which doesn't have a capacity (it still knows its own length). 1: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.into_boxed_slice https://doc.rust-lang.org/std/vec/struct.Vec.html#method.int...