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Highlight thread_local! const init in docs

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Kornel 2025-02-17 17:05:21 +00:00
parent a18bd8acfc
commit b94162078d
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1 changed files with 6 additions and 5 deletions
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11
library/std/src/thread/local.rs
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@ -50,7 +50,8 @@ use crate::fmt;
/// use std::cell::Cell;
/// use std::thread;
///
/// thread_local!(static FOO: Cell<u32> = Cell::new(1));
/// // explicit `const {}` block enables more efficient initialization
/// thread_local!(static FOO: Cell<u32> = const { Cell::new(1) });
///
/// assert_eq!(FOO.get(), 1);
/// FOO.set(2);
@ -138,7 +139,7 @@ impl<T: 'static> fmt::Debug for LocalKey<T> {
/// use std::cell::{Cell, RefCell};
///
/// thread_local! {
/// pub static FOO: Cell<u32> = Cell::new(1);
/// pub static FOO: Cell<u32> = const { Cell::new(1) };
///
/// static BAR: RefCell<Vec<f32>> = RefCell::new(vec![1.0, 2.0]);
/// }
@ -394,7 +395,7 @@ impl<T: 'static> LocalKey<Cell<T>> {
/// use std::cell::Cell;
///
/// thread_local! {
/// static X: Cell<i32> = Cell::new(1);
/// static X: Cell<i32> = const { Cell::new(1) };
/// }
///
/// assert_eq!(X.get(), 1);
@ -423,7 +424,7 @@ impl<T: 'static> LocalKey<Cell<T>> {
/// use std::cell::Cell;
///
/// thread_local! {
/// static X: Cell<Option<i32>> = Cell::new(Some(1));
/// static X: Cell<Option<i32>> = const { Cell::new(Some(1)) };
/// }
///
/// assert_eq!(X.take(), Some(1));
@ -453,7 +454,7 @@ impl<T: 'static> LocalKey<Cell<T>> {
/// use std::cell::Cell;
///
/// thread_local! {
/// static X: Cell<i32> = Cell::new(1);
/// static X: Cell<i32> = const { Cell::new(1) };
/// }
///
/// assert_eq!(X.replace(2), 1);