If you understand the borrow checker, closures are just not that much on top of things.

In fact I can’t remember the last time I had to fight with them.

I really wanted just yesterday to create a dyn AsyncFnMut, which apparently still needs async-trait to build the stable. but I was pretty much unable to figure out how to make that work with a lambda. saying this is all trivial once you understand the borrow machinery is really understating it.

	▲	kibwen 4 hours ago \| parent \| next [-]
		> saying this is all trivial The comment above isn't saying that closures are trivial. Once you understand the borrow checker, you understand that it's a miracle that closures in Rust can possibly work at all, given Rust's other dueling goals of being a GC-less language with guaranteed memory safety despite letting closures close over arbitrary references. Rust is in uncharted territory here, drawing the map as it goes.
	▲	speed_spread 3 hours ago \| parent \| prev [-]
		Async is the stuff that messes up everything. Closures are not complicated.