src/test/compile-fail/traits-negative-impls.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 // The dummy functions are used to avoid adding new cfail files.
  12 // What happens is that the compiler attempts to squash duplicates and some
  13 // errors are not reported. This way, we make sure that, for each function, different
  14 // typeck phases are involved and all errors are reported.
  15
  16 #![feature(optin_builtin_traits)]
  17
  18 use std::marker::Send;
  19
  20 struct Outer<T: Send>(T);
  21
  22 struct Outer2<T>(T);
  23
  24 unsafe impl<T: Send> Sync for Outer2<T> {}
  25
  26 fn is_send<T: Send>(_: T) {}
  27 fn is_sync<T: Sync>(_: T) {}
  28
  29 fn dummy() {
  30     struct TestType;
  31     impl !Send for TestType {}
  32
  33     Outer(TestType);
  34     //~^ ERROR the trait `core::marker::Send` is not implemented for the type `dummy::TestType`
  35
  36     is_send(TestType);
  37     //~^ ERROR the trait `core::marker::Send` is not implemented for the type `dummy::TestType`
  38
  39     is_send((8, TestType));
  40     //~^ ERROR the trait `core::marker::Send` is not implemented for the type `dummy::TestType`
  41 }
  42
  43 fn dummy2() {
  44     struct TestType;
  45     impl !Send for TestType {}
  46
  47     is_send(Box::new(TestType));
  48     //~^ ERROR the trait `core::marker::Send` is not implemented for the type `dummy2::TestType`
  49 }
  50
  51 fn dummy3() {
  52     struct TestType;
  53     impl !Send for TestType {}
  54
  55     is_send(Box::new(Outer2(TestType)));
  56     //~^ ERROR the trait `core::marker::Send` is not implemented for the type `dummy3::TestType`
  57 }
  58
  59 fn main() {
  60     struct TestType;
  61     impl !Send for TestType {}
  62
  63     // This will complain about a missing Send impl because `Sync` is implement *just*
  64     // for T that are `Send`. Look at #20366 and #19950
  65     is_sync(Outer2(TestType));
  66     //~^ ERROR the trait `core::marker::Send` is not implemented for the type `main::TestType`
  67 }