import ptr::to_uint; fn borrow(x: &int, f: fn(x: &int)) { f(x) } fn test1(x: @~int) { // Right now, at least, this induces a copy of the unique pointer: do borrow({*x}) |p| { let x_a = ptr::addr_of(**x); assert (x_a as uint) != to_uint(p); assert unsafe{*x_a} == *p; } } fn main() { test1(@~22); }