diff options
Diffstat (limited to 'library/alloc/src/macros.rs')
| -rw-r--r-- | library/alloc/src/macros.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/library/alloc/src/macros.rs b/library/alloc/src/macros.rs index a992d768d63..7d4eff6185d 100644 --- a/library/alloc/src/macros.rs +++ b/library/alloc/src/macros.rs @@ -29,6 +29,10 @@ /// to the same boxed integer value, not five references pointing to independently /// boxed integers. /// +/// Also, note that `vec![expr; 0]` is allowed, and produces an empty vector. +/// This will still evaluate `expr`, however, and immediately drop the resulting value, so +/// be mindful of side effects. +/// /// [`Vec`]: crate::vec::Vec #[cfg(not(test))] #[macro_export] |