[stuhood]

This is a really interesting thought. In the presence of must-use types, you'd imagine that types with side effecting Drop impls (like files), would want to migrate to eventually being used/consumed by a "close" method. But doing that safely in the presence of panics would require... exception handlers?...

[panic]

You could use something like Go's 'defer' statement to ensure 'close' is called before the current function returns.

[belovedeagle]

Which already exists in Rust in the form of... wait for it... the Drop trait. It's the same thing.

[matt_kantor]

The difference is that Go's `defer` is explicitly written out in the relevant scope, while Rust's `Drop` is implicit and defined elsewhere.

[steveklabnik]

There's a "scopeguard" crate that uses Drop to make it explicit.