rust/src/libstd/sys_common, branch 1.34.2

Auto merge of #58357 - sfackler:vectored-io, r=alexcrichton

2019-02-26T02:48:13+00:00

Add vectored read and write support This functionality has lived for a while in the tokio ecosystem, where it can improve performance by minimizing copies. r? @alexcrichton

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.

Add vectored read and write support

2019-02-14T03:40:17+00:00

This functionality has lived for a while in the tokio ecosystem, where it can improve performance by minimizing copies.

libs: doc comments

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

Bound sgx target_env with fortanix as target_vendor

2019-01-01T00:32:56+00:00

Signed-off-by: Yu Ding

Remove licenses

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

std: Use backtrace-sys from crates.io

2018-12-24T16:32:57+00:00

This commit switches the standard library to using the `backtrace-sys` crate from crates.io instead of duplicating the logic here in the Rust repositor with the `backtrace-sys`'s crate's logic. Eventually this will hopefully be a good step towards using the `backtrace` crate directly from crates.io itself, but we're not quite there yet! Hopefully this is a small incremental first step we can take.

std: Use `rustc_demangle` from crates.io

2018-12-14T23:15:53+00:00

No more need to duplicate the demangling routine between crates.io and the standard library, we can use the exact same one!

Remove unnecessary feature gates from const fns

2018-12-11T09:32:39+00:00