src/test/compile-fail/typeck-default-trait-impl-negation-sync.rs

   1 // Copyright 2015 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 // ignore-tidy-linelength
  12
  13 #![feature(optin_builtin_traits)]
  14
  15 struct Managed;
  16 impl !Send for Managed {}
  17 impl !Sync for Managed {}
  18
  19 use std::cell::UnsafeCell;
  20
  21 struct MySync {
  22    t: *mut u8
  23 }
  24
  25 unsafe impl Sync for MySync {}
  26
  27 struct MyNotSync {
  28    t: *mut u8
  29 }
  30
  31 impl !Sync for MyNotSync {}
  32
  33 struct MyTypeWUnsafe {
  34    t: UnsafeCell<u8>
  35 }
  36
  37 struct MyTypeManaged {
  38    t: Managed
  39 }
  40
  41 fn is_sync<T: Sync>() {}
  42
  43 fn main() {
  44     is_sync::<MySync>();
  45     is_sync::<MyNotSync>();
  46     //~^ ERROR `MyNotSync: std::marker::Sync` is not satisfied
  47
  48     is_sync::<MyTypeWUnsafe>();
  49     //~^ ERROR `std::cell::UnsafeCell<u8>: std::marker::Sync` is not satisfied
  50
  51     is_sync::<MyTypeManaged>();
  52     //~^ ERROR `Managed: std::marker::Sync` is not satisfied
  53 }