Rust supports arena allocator https://docs.rs/bumpalo/latest/bumpalo/ https://docs.rs/bumpalo/latest/bumpalo/ and the dropping plays well with arena as long as

Rust supports arena allocator https://docs.rs/bumpalo/latest/bumpalo/ https://docs.rs/bumpalo/latest/bumpalo/ and the dropping plays well with arena as long as you use bumpalo::boxed::Box