| // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Constants (static variables) can be used to match in patterns, but mutable |
| // statics cannot. This ensures that there's some form of error if this is |
| // attempted. |
| |
| |
| #![feature(libc)] |
| |
| extern crate libc; |
| |
| #[link(name = "rust_test_helpers")] |
| extern { |
| static mut rust_dbg_static_mut: libc::c_int; |
| pub fn rust_dbg_static_mut_check_four(); |
| } |
| |
| unsafe fn static_bound(_: &'static libc::c_int) {} |
| |
| fn static_bound_set(a: &'static mut libc::c_int) { |
| *a = 3; |
| } |
| |
| unsafe fn run() { |
| assert_eq!(rust_dbg_static_mut, 3); |
| rust_dbg_static_mut = 4; |
| assert_eq!(rust_dbg_static_mut, 4); |
| rust_dbg_static_mut_check_four(); |
| rust_dbg_static_mut += 1; |
| assert_eq!(rust_dbg_static_mut, 5); |
| rust_dbg_static_mut *= 3; |
| assert_eq!(rust_dbg_static_mut, 15); |
| rust_dbg_static_mut = -3; |
| assert_eq!(rust_dbg_static_mut, -3); |
| static_bound(&rust_dbg_static_mut); |
| static_bound_set(&mut rust_dbg_static_mut); |
| } |
| |
| pub fn main() { |
| unsafe { run() } |
| } |