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//@ run-pass
// 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.
// FIXME(static_mut_refs): Do not allow `static_mut_refs` lint
#![allow(static_mut_refs)]
use std::ffi::c_int;
#[link(name = "rust_test_helpers", kind = "static")]
extern "C" {
static mut rust_dbg_static_mut: c_int;
pub fn rust_dbg_static_mut_check_four();
}
unsafe fn static_bound(_: &'static c_int) {}
fn static_bound_set(a: &'static mut 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() }
}
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