48 lines
1.4 KiB
Rust
48 lines
1.4 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Constants (static variables) can be used to match in patterns, but mutable
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// statics cannot. This ensures that there's some form of error if this is
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// attempted.
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use std::libc;
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#[nolink]
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extern {
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static mut rust_dbg_static_mut: libc::c_int;
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pub fn rust_dbg_static_mut_check_four();
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}
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unsafe fn static_bound(_: &'static libc::c_int) {}
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fn static_bound_set(a: &'static mut libc::c_int) {
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*a = 3;
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}
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#[fixed_stack_segment] #[inline(never)]
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unsafe fn run() {
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assert!(rust_dbg_static_mut == 3);
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rust_dbg_static_mut = 4;
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assert!(rust_dbg_static_mut == 4);
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rust_dbg_static_mut_check_four();
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rust_dbg_static_mut += 1;
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assert!(rust_dbg_static_mut == 5);
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rust_dbg_static_mut *= 3;
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assert!(rust_dbg_static_mut == 15);
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rust_dbg_static_mut = -3;
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assert!(rust_dbg_static_mut == -3);
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static_bound(&rust_dbg_static_mut);
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static_bound_set(&mut rust_dbg_static_mut);
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}
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pub fn main() {
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unsafe { run() }
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}
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