rust/src/liballoc/collections/btree/set.rs, branch 1.34.2

Rollup merge of #58553 - scottmcm:more-ihle, r=Centril

2019-02-20T03:59:10+00:00

Use more impl header lifetime elision Inspired by seeing explicit lifetimes on these two: - https://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#impl-FusedIterator - https://doc.rust-lang.org/nightly/std/primitive.u32.html#impl-Not And a follow-up to https://github.com/rust-lang/rust/pull/54687, that started using IHLE in libcore. Most of the changes in here fall into two big categories: - Removing lifetimes from common traits that can essentially never user a lifetime from an input (particularly `Drop`, `Debug`, and `Clone`) - Forwarding impls that are only possible because the lifetime doesn't matter (like `impl Read for &mut R`) I omitted things that seemed like they could be more controversial, like the handful of iterators that have a `Item: 'static` despite the iterator having a lifetime or the `PartialEq` implementations [where the flipped one cannot elide the lifetime](https://internals.rust-lang.org/t/impl-type-parameter-aliases/9403/2?u=scottmcm). I also removed two lifetimes that turned out to be completely unused; see https://github.com/rust-lang/rust/issues/41960#issuecomment-464557423

Use more impl header lifetime elision

2019-02-18T03:42:36+00:00

There are two big categories of changes in here - Removing lifetimes from common traits that can essentially never user a lifetime from an input (particularly `Drop` & `Debug`) - Forwarding impls that are only possible because the lifetime doesn't matter (like `impl Read for &mut R`) I omitted things that seemed like they could be more controversial, like the handful of iterators that have a `Item: 'static` despite the iterator having a lifetime or the `PartialEq` implementations where the flipped one cannot elide the lifetime.

libs: doc comments

2019-02-10T23:57:25+00:00

liballoc: revert nested imports style changes.

2019-02-03T07:27:44+00:00

liballoc: fix some idiom lints.

2019-02-02T11:48:12+00:00

liballoc: elide some lifetimes.

2019-02-02T11:23:15+00:00

liballoc: prefer imports of borrow from libcore.

2019-02-02T09:53:27+00:00

liballoc: refactor & fix some imports.

2019-02-02T09:14:40+00:00

liballoc: cargo check passes on 2018

2019-02-02T07:36:45+00:00

Remove licenses

2018-12-26T04:08:33+00:00