Merging upstream version 1.66.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 72 insertions, 8 deletions

diff --git a/vendor/once_cell/src/lib.rs b/vendor/once_cell/src/lib.rs
index 70f08dea6..6de1e3eeb 100644
--- a/vendor/once_cell/src/lib.rs
+++ b/vendor/once_cell/src/lib.rs
@@ -267,7 +267,7 @@
 //!
 //! # Minimum Supported `rustc` Version
 //!
-//! This crate's minimum supported `rustc` version is `1.36.0`.
+//! This crate's minimum supported `rustc` version is `1.56.0`.
 //!
 //! If only the `std` feature is enabled, MSRV will be updated conservatively.
 //! When using other features, like `parking_lot`, MSRV might be updated more frequently, up to the latest stable.
@@ -348,11 +348,9 @@ pub mod unsync {
         cell::{Cell, UnsafeCell},
         fmt, hint, mem,
         ops::{Deref, DerefMut},
+        panic::{RefUnwindSafe, UnwindSafe},
     };
 
-    #[cfg(feature = "std")]
-    use std::panic::{RefUnwindSafe, UnwindSafe};
-
     /// A cell which can be written to only once. It is not thread safe.
     ///
     /// Unlike [`std::cell::RefCell`], a `OnceCell` provides simple `&`
@@ -382,9 +380,7 @@ pub mod unsync {
     // `&unsync::OnceCell` to sneak a `T` through `catch_unwind`,
     // by initializing the cell in closure and extracting the value in the
     // `Drop`.
-    #[cfg(feature = "std")]
     impl<T: RefUnwindSafe + UnwindSafe> RefUnwindSafe for OnceCell<T> {}
-    #[cfg(feature = "std")]
     impl<T: UnwindSafe> UnwindSafe for OnceCell<T> {}
 
     impl<T> Default for OnceCell<T> {
@@ -680,7 +676,6 @@ pub mod unsync {
         init: Cell<Option<F>>,
     }
 
-    #[cfg(feature = "std")]
     impl<T, F: RefUnwindSafe> RefUnwindSafe for Lazy<T, F> where OnceCell<T>: RefUnwindSafe {}
 
     impl<T: fmt::Debug, F> fmt::Debug for Lazy<T, F> {
@@ -742,6 +737,25 @@ pub mod unsync {
             })
         }
 
+        /// Forces the evaluation of this lazy value and returns a mutable reference to
+        /// the result.
+        ///
+        /// This is equivalent to the `DerefMut` impl, but is explicit.
+        ///
+        /// # Example
+        /// ```
+        /// use once_cell::unsync::Lazy;
+        ///
+        /// let mut lazy = Lazy::new(|| 92);
+        ///
+        /// assert_eq!(Lazy::force_mut(&mut lazy), &92);
+        /// assert_eq!(*lazy, 92);
+        /// ```
+        pub fn force_mut(this: &mut Lazy<T, F>) -> &mut T {
+            Self::force(this);
+            Self::get_mut(this).unwrap_or_else(|| unreachable!())
+        }
+
         /// Gets the reference to the result of this lazy value if
         /// it was initialized, otherwise returns `None`.
         ///
@@ -758,6 +772,23 @@ pub mod unsync {
         pub fn get(this: &Lazy<T, F>) -> Option<&T> {
             this.cell.get()
         }
+
+        /// Gets the mutable reference to the result of this lazy value if
+        /// it was initialized, otherwise returns `None`.
+        ///
+        /// # Example
+        /// ```
+        /// use once_cell::unsync::Lazy;
+        ///
+        /// let mut lazy = Lazy::new(|| 92);
+        ///
+        /// assert_eq!(Lazy::get_mut(&mut lazy), None);
+        /// assert_eq!(*lazy, 92);
+        /// assert_eq!(Lazy::get_mut(&mut lazy), Some(&mut 92));
+        /// ```
+        pub fn get_mut(this: &mut Lazy<T, F>) -> Option<&mut T> {
+            this.cell.get_mut()
+        }
     }
 
     impl<T, F: FnOnce() -> T> Deref for Lazy<T, F> {
@@ -1189,7 +1220,6 @@ pub mod sync {
     unsafe impl<T, F: Send> Sync for Lazy<T, F> where OnceCell<T>: Sync {}
     // auto-derived `Send` impl is OK.
 
-    #[cfg(feature = "std")]
     impl<T, F: RefUnwindSafe> RefUnwindSafe for Lazy<T, F> where OnceCell<T>: RefUnwindSafe {}
 
     impl<T, F> Lazy<T, F> {
@@ -1232,6 +1262,23 @@ pub mod sync {
             })
         }
 
+        /// Forces the evaluation of this lazy value and
+        /// returns a mutable reference to the result. This is equivalent
+        /// to the `Deref` impl, but is explicit.
+        ///
+        /// # Example
+        /// ```
+        /// use once_cell::sync::Lazy;
+        ///
+        /// let mut lazy = Lazy::new(|| 92);
+        ///
+        /// assert_eq!(Lazy::force_mut(&mut lazy), &mut 92);
+        /// ```
+        pub fn force_mut(this: &mut Lazy<T, F>) -> &mut T {
+            Self::force(this);
+            Self::get_mut(this).unwrap_or_else(|| unreachable!())
+        }
+
         /// Gets the reference to the result of this lazy value if
         /// it was initialized, otherwise returns `None`.
         ///
@@ -1248,6 +1295,23 @@ pub mod sync {
         pub fn get(this: &Lazy<T, F>) -> Option<&T> {
             this.cell.get()
         }
+
+        /// Gets the reference to the result of this lazy value if
+        /// it was initialized, otherwise returns `None`.
+        ///
+        /// # Example
+        /// ```
+        /// use once_cell::sync::Lazy;
+        ///
+        /// let mut lazy = Lazy::new(|| 92);
+        ///
+        /// assert_eq!(Lazy::get_mut(&mut lazy), None);
+        /// assert_eq!(&*lazy, &92);
+        /// assert_eq!(Lazy::get_mut(&mut lazy), Some(&mut 92));
+        /// ```
+        pub fn get_mut(this: &mut Lazy<T, F>) -> Option<&mut T> {
+            this.cell.get_mut()
+        }
     }
 
     impl<T, F: FnOnce() -> T> Deref for Lazy<T, F> {