diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libcore/mem.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libcore/mem.rs b/src/libcore/mem.rs index 84173654655..8fb4e0d6a02 100644 --- a/src/libcore/mem.rs +++ b/src/libcore/mem.rs @@ -229,6 +229,8 @@ pub fn forget<T>(t: T) { /// 2. Round up the current size to the nearest multiple of the next field's [alignment]. /// /// Finally, round the size of the struct to the nearest multiple of its [alignment]. +/// The alignment of the struct is usually the largest alignment of all its +/// fields; this can be changed with the use of `repr(align(N))`. /// /// Unlike `C`, zero sized structs are not rounded up to one byte in size. /// @@ -283,7 +285,8 @@ pub fn forget<T>(t: T) { /// // The size of the second field is 2, so add 2 to the size. Size is 4. /// // The alignment of the third field is 1, so add 0 to the size for padding. Size is 4. /// // The size of the third field is 1, so add 1 to the size. Size is 5. -/// // Finally, the alignment of the struct is 2, so add 1 to the size for padding. Size is 6. +/// // Finally, the alignment of the struct is 2 (because the largest alignment amongst its +/// // fields is 2), so add 1 to the size for padding. Size is 6. /// assert_eq!(6, mem::size_of::<FieldStruct>()); /// /// #[repr(C)] |