struct Box[T]{
	field buffer:[sizeof(T)] u8;

	method new(self:out Box[T], t:in T){
		unsafe{
			*self = Box[T]{
				buffer = uninitialized
			};
			*(self->buffer as out T) = *t;
		}
	}

	method borrow(self:ref Box[T]):ref T{
		unsafe{
			return (self->buffer as ref T);
		}
	}
}

function outer(){
	let b:Box[i32] = Box[i32]::new(&in 42);

	inner(b.borrow());
}

function inner(p:ref i32){
	//do whatever you want with p
}