src/test/run-pass/issue-17718-static-unsafe-interior.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // pretty-expanded FIXME #23616
  12
  13 #![feature(core)]
  14 #![feature(const_fn)]
  15
  16
  17 use std::marker;
  18 use std::cell::UnsafeCell;
  19
  20 struct MyUnsafePack<T>(UnsafeCell<T>);
  21
  22 unsafe impl<T: Send> Sync for MyUnsafePack<T> {}
  23
  24 struct MyUnsafe<T> {
  25     value: MyUnsafePack<T>
  26 }
  27
  28 impl<T> MyUnsafe<T> {
  29     fn forbidden(&self) {}
  30 }
  31
  32 unsafe impl<T: Send> Sync for MyUnsafe<T> {}
  33
  34 enum UnsafeEnum<T> {
  35     VariantSafe,
  36     VariantUnsafe(UnsafeCell<T>)
  37 }
  38
  39 unsafe impl<T: Send> Sync for UnsafeEnum<T> {}
  40
  41 static STATIC1: UnsafeEnum<isize> = UnsafeEnum::VariantSafe;
  42
  43 static STATIC2: MyUnsafePack<isize> = MyUnsafePack(UnsafeCell::new(1));
  44 const CONST: MyUnsafePack<isize> = MyUnsafePack(UnsafeCell::new(1));
  45 static STATIC3: MyUnsafe<isize> = MyUnsafe{value: CONST};
  46
  47 static STATIC4: &'static MyUnsafePack<isize> = &STATIC2;
  48
  49 struct Wrap<T> {
  50     value: T
  51 }
  52
  53 unsafe impl<T: Send> Sync for Wrap<T> {}
  54
  55 static UNSAFE: MyUnsafePack<isize> = MyUnsafePack(UnsafeCell::new(2));
  56 static WRAPPED_UNSAFE: Wrap<&'static MyUnsafePack<isize>> = Wrap { value: &UNSAFE };
  57
  58 fn main() {
  59     let a = &STATIC1;
  60
  61     STATIC3.forbidden()
  62 }