| //@ run-pass |
| |
| #![feature(rustc_private)] |
| |
| extern crate libc; |
| |
| mod rustrt { |
| extern crate libc; |
| |
| #[link(name = "rust_test_helpers", kind = "static")] |
| extern "C" { |
| pub fn rust_dbg_call( |
| cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t, |
| data: libc::uintptr_t, |
| ) -> libc::uintptr_t; |
| } |
| } |
| |
| extern "C" fn cb(data: libc::uintptr_t) -> libc::uintptr_t { |
| if data == 1 { data } else { fact(data - 1) * data } |
| } |
| |
| fn fact(n: libc::uintptr_t) -> libc::uintptr_t { |
| unsafe { |
| println!("n = {}", n); |
| rustrt::rust_dbg_call(cb, n) |
| } |
| } |
| |
| pub fn main() { |
| let result = fact(10); |
| println!("result = {}", result); |
| assert_eq!(result, 3628800); |
| } |
