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Clarify align_to's requirements and obligations

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This commit is contained in:
Jake Goulding 2019-08-05 11:57:55 -04:00
parent 4be0675589
commit 571e22d7e8
1 changed files with 8 additions and 6 deletions
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14
src/libcore/slice/mod.rs
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@ -2308,9 +2308,10 @@ impl<T> [T] {
/// maintained.
///
/// This method splits the slice into three distinct slices: prefix, correctly aligned middle
/// slice of a new type, and the suffix slice. The method does a best effort to make the
/// middle slice the greatest length possible for a given type and input slice, but only
/// your algorithm's performance should depend on that, not its correctness.
/// slice of a new type, and the suffix slice. The method may make the middle slice the greatest
/// length possible for a given type and input slice, but only your algorithm's performance
/// should depend on that, not its correctness. It is permissible for all of the input data to
/// be returned as the prefix or suffix slice.
///
/// This method has no purpose when either input element `T` or output element `U` are
/// zero-sized and will return the original slice without splitting anything.
@ -2361,9 +2362,10 @@ impl<T> [T] {
/// maintained.
///
/// This method splits the slice into three distinct slices: prefix, correctly aligned middle
/// slice of a new type, and the suffix slice. The method does a best effort to make the
/// middle slice the greatest length possible for a given type and input slice, but only
/// your algorithm's performance should depend on that, not its correctness.
/// slice of a new type, and the suffix slice. The method may make the middle slice the greatest
/// length possible for a given type and input slice, but only your algorithm's performance
/// should depend on that, not its correctness. It is permissible for all of the input data to
/// be returned as the prefix or suffix slice.
///
/// This method has no purpose when either input element `T` or output element `U` are
/// zero-sized and will return the original slice without splitting anything.