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| -rw-r--r-- | library/std/src/sync/lazy_lock.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/library/std/src/sync/lazy_lock.rs b/library/std/src/sync/lazy_lock.rs index a6bc468b092..37bdec5abcc 100644 --- a/library/std/src/sync/lazy_lock.rs +++ b/library/std/src/sync/lazy_lock.rs @@ -25,6 +25,8 @@ union Data<T, F> { /// /// # Examples /// +/// Initialize static variables with `LazyLock`. +/// /// ``` /// #![feature(lazy_cell)] /// @@ -54,6 +56,24 @@ union Data<T, F> { /// // Some("Hoyten") /// } /// ``` +/// Initialize fields with `LazyLock`. +/// ``` +/// #![feature(lazy_cell)] +/// +/// use std::sync::LazyLock; +/// +/// #[derive(Debug)] +/// struct UseCellLock { +/// number: LazyLock<u32>, +/// } +/// fn main() { +/// let lock: LazyLock<u32> = LazyLock::new(|| 0u32); +/// +/// let data = UseCellLock { number: lock }; +/// println!("{}", *data.number); +/// } +/// ``` + #[unstable(feature = "lazy_cell", issue = "109736")] pub struct LazyLock<T, F = fn() -> T> { once: Once, |