src/test/ui/statics/issue-17718-static-unsafe-interior.rs

   1 // run-pass
   2 #![allow(dead_code)]
   3 #![allow(unused_variables)]
   4 #![allow(unused_imports)]
   5 // pretty-expanded FIXME #23616
   6
   7 use std::marker;
   8 use std::cell::UnsafeCell;
   9
  10 struct MyUnsafePack<T>(UnsafeCell<T>);
  11
  12 unsafe impl<T: Send> Sync for MyUnsafePack<T> {}
  13
  14 struct MyUnsafe<T> {
  15     value: MyUnsafePack<T>
  16 }
  17
  18 impl<T> MyUnsafe<T> {
  19     fn forbidden(&self) {}
  20 }
  21
  22 unsafe impl<T: Send> Sync for MyUnsafe<T> {}
  23
  24 enum UnsafeEnum<T> {
  25     VariantSafe,
  26     VariantUnsafe(UnsafeCell<T>)
  27 }
  28
  29 unsafe impl<T: Send> Sync for UnsafeEnum<T> {}
  30
  31 static STATIC1: UnsafeEnum<isize> = UnsafeEnum::VariantSafe;
  32
  33 static STATIC2: MyUnsafePack<isize> = MyUnsafePack(UnsafeCell::new(1));
  34 const CONST: MyUnsafePack<isize> = MyUnsafePack(UnsafeCell::new(1));
  35 static STATIC3: MyUnsafe<isize> = MyUnsafe{value: CONST};
  36
  37 static STATIC4: &'static MyUnsafePack<isize> = &STATIC2;
  38
  39 struct Wrap<T> {
  40     value: T
  41 }
  42
  43 unsafe impl<T: Send> Sync for Wrap<T> {}
  44
  45 static UNSAFE: MyUnsafePack<isize> = MyUnsafePack(UnsafeCell::new(2));
  46 static WRAPPED_UNSAFE: Wrap<&'static MyUnsafePack<isize>> = Wrap { value: &UNSAFE };
  47
  48 fn main() {
  49     let a = &STATIC1;
  50
  51     STATIC3.forbidden()
  52 }