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c43344e839
Before making thread_local accept statements inside the const block,
this test would fail to compile as follows:
error: no rules expected the token `let`
--> library/std/tests/thread.rs:26:13
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26 | let value = 1;
| ^^^ no rules expected this token in macro call
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note: while trying to match meta-variable `$init:expr`
--> library/std/src/thread/local.rs:189:69
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189 | ($(#[$attr:meta])* $vis:vis static $name:ident: $t:ty = const { $init:expr }; $($rest:tt)*) => (
| ^^^^^^^^^^
39 lines
1.0 KiB
Rust
39 lines
1.0 KiB
Rust
use std::cell::{Cell, RefCell};
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use std::sync::{Arc, Mutex};
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use std::thread;
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use std::time::Duration;
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#[test]
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#[cfg_attr(target_os = "emscripten", ignore)]
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fn sleep() {
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let finished = Arc::new(Mutex::new(false));
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let t_finished = finished.clone();
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thread::spawn(move || {
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thread::sleep(Duration::new(u64::MAX, 0));
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*t_finished.lock().unwrap() = true;
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});
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thread::sleep(Duration::from_millis(100));
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assert_eq!(*finished.lock().unwrap(), false);
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}
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#[test]
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fn thread_local_containing_const_statements() {
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// This exercises the `const $init:block` cases of the thread_local macro.
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// Despite overlapping with expression syntax, the `const { ... }` is not
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// parsed as `$init:expr`.
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thread_local! {
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static CELL: Cell<u32> = const {
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let value = 1;
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Cell::new(value)
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};
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static REFCELL: RefCell<u32> = const {
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let value = 1;
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RefCell::new(value)
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};
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}
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assert_eq!(CELL.get(), 1);
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assert_eq!(REFCELL.take(), 1);
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}
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