rust/tests/ui/no_send-enum.rs

#![feature(negative_impls)]

use std::marker::Send;

struct NoSend;
impl !Send for NoSend {}

enum Foo {
    A(NoSend)
}

fn bar<T: Send>(_: T) {}

fn main() {
    let x = Foo::A(NoSend);
    bar(x);
    //~^ ERROR `NoSend` cannot be sent between threads safely
}
introduce `negative_impls` feature gate and document They used to be covered by `optin_builtin_traits` but negative impls are now applicable to all traits, not just auto traits. This also adds docs in the unstable book for the current state of auto traits. 2020-01-09 10:56:38 +00:00			`#![feature(negative_impls)]`
Don't use NoSend/NoSync in tests 2015-01-11 12:14:39 +00:00
			`use std::marker::Send;`

			`struct NoSend;`
			`impl !Send for NoSend {}`
Introduce marker types for indicating variance and for opting out of builtin bounds. Fixes #10834. Fixes #11385. cc #5922. 2014-01-22 19:03:02 +00:00
			`enum Foo {`
Don't use NoSend/NoSync in tests 2015-01-11 12:14:39 +00:00			`A(NoSend)`
Introduce marker types for indicating variance and for opting out of builtin bounds. Fixes #10834. Fixes #11385. cc #5922. 2014-01-22 19:03:02 +00:00			`}`
compile-fail tests for #[non_owned] and #[mutable] 2013-05-05 19:55:32 +00:00
librustc: Change "Owned" to "Send" everywhere 2013-06-06 00:56:24 +00:00			`fn bar<T: Send>(_: T) {}`
compile-fail tests for #[non_owned] and #[mutable] 2013-05-05 19:55:32 +00:00
			`fn main() {`
Don't use NoSend/NoSync in tests 2015-01-11 12:14:39 +00:00			`let x = Foo::A(NoSend);`
Added tests to make tidy 2014-02-05 22:33:10 +00:00			`bar(x);`
Add message to `rustc_on_unimplemented` attributes in core 2018-06-09 23:53:36 +00:00			//~^ ERROR `NoSend` cannot be sent between threads safely
compile-fail tests for #[non_owned] and #[mutable] 2013-05-05 19:55:32 +00:00			`}`