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Diffstat (limited to 'library/alloc/src/vec')
| -rw-r--r-- | library/alloc/src/vec/mod.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/library/alloc/src/vec/mod.rs b/library/alloc/src/vec/mod.rs index 27efffb72ac..711b4a8a8ef 100644 --- a/library/alloc/src/vec/mod.rs +++ b/library/alloc/src/vec/mod.rs @@ -1490,6 +1490,12 @@ impl<T, A: Allocator> Vec<T, A> { /// vec.insert(4, 5); /// assert_eq!(vec, [1, 4, 2, 3, 5]); /// ``` + /// + /// # Time complexity + /// + /// Takes *O*(`len`) time. All items after the insertion index must be + /// shifted to the right. In the worst case, all elements are shifted when + /// the insertion index is 0. #[cfg(not(no_global_oom_handling))] #[stable(feature = "rust1", since = "1.0.0")] pub fn insert(&mut self, index: usize, element: T) { |