diff options
| -rw-r--r-- | library/core/src/ptr/non_null.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/library/core/src/ptr/non_null.rs b/library/core/src/ptr/non_null.rs index 9c0236c172a..8bb87734eb3 100644 --- a/library/core/src/ptr/non_null.rs +++ b/library/core/src/ptr/non_null.rs @@ -1575,6 +1575,27 @@ impl<T> NonNull<[T]> { self.as_ptr().len() } + /// Returns `true` if the non-null raw slice has a length of 0. + /// + /// # Examples + /// + /// ```rust + /// use std::ptr::NonNull; + /// + /// let slice: NonNull<[i8]> = NonNull::slice_from_raw_parts(NonNull::dangling(), 3); + /// assert!(!slice.is_empty()); + /// ``` + #[stable(feature = "slice_ptr_is_empty_nonnull", since = "CURRENT_RUSTC_VERSION")] + #[rustc_const_stable( + feature = "const_slice_ptr_is_empty_nonnull", + since = "CURRENT_RUSTC_VERSION" + )] + #[must_use] + #[inline] + pub const fn is_empty(self) -> bool { + self.len() == 0 + } + /// Returns a non-null pointer to the slice's buffer. /// /// # Examples |