There's some ugly hacks that may or may not help here: https://www.reddit.com/r/rust/comments/xxhp3s/perhaps_not_a_new_discovery_but_box_syntax_on/ https://www

There's some ugly hacks that may or may not help here: https://www.reddit.com/r/rust/comments/xxhp3s/perhaps_not_a_new_discovery_but_box_syntax_on/ https://www.reddit.com/r/rust/comments/xxhp3s/perhaps_not_a_... r#box!(make_my_elem()) This crate is marked as deprecated because apparently upstream rust optimises its use-case now, but you never know: https://github.com/kvark/copyless https://github.com/kvark/copyless Box::alloc().init(make_my_elem())