std: Stabilize APIs for the 1.10 release by alexcrichton · Pull Request #33699 · rust-lang/rust

alexcrichton · 2016-05-17T22:03:36Z

This commit applies the FCP decisions made by the libs team for the 1.10 cycle,
including both new stabilizations and deprecations. Specifically, the list of
APIs is:

Stabilized:

os::windows::fs::OpenOptionsExt::access_mode
os::windows::fs::OpenOptionsExt::share_mode
os::windows::fs::OpenOptionsExt::custom_flags
os::windows::fs::OpenOptionsExt::attributes
os::windows::fs::OpenOptionsExt::security_qos_flags
os::unix::fs::OpenOptionsExt::custom_flags
sync::Weak::new
Default for sync::Weak
panic::set_hook
panic::take_hook
panic::PanicInfo
panic::PanicInfo::payload
panic::PanicInfo::location
panic::Location
panic::Location::file
panic::Location::line
ffi::CStr::from_bytes_with_nul
ffi::CStr::from_bytes_with_nul_unchecked
ffi::FromBytesWithNulError
fs::Metadata::modified
fs::Metadata::accessed
fs::Metadata::created
sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange
sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak
collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key
os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}
SocketAddr::is_unnamed
SocketAddr::as_pathname
UnixStream::connect
UnixStream::pair
UnixStream::try_clone
UnixStream::local_addr
UnixStream::peer_addr
UnixStream::set_read_timeout
UnixStream::set_write_timeout
UnixStream::read_timeout
UnixStream::write_Timeout
UnixStream::set_nonblocking
UnixStream::take_error
UnixStream::shutdown
Read/Write/RawFd impls for UnixStream
UnixListener::bind
UnixListener::accept
UnixListener::try_clone
UnixListener::local_addr
UnixListener::set_nonblocking
UnixListener::take_error
UnixListener::incoming
RawFd impls for UnixListener
UnixDatagram::bind
UnixDatagram::unbound
UnixDatagram::pair
UnixDatagram::connect
UnixDatagram::try_clone
UnixDatagram::local_addr
UnixDatagram::peer_addr
UnixDatagram::recv_from
UnixDatagram::recv
UnixDatagram::send_to
UnixDatagram::send
UnixDatagram::set_read_timeout
UnixDatagram::set_write_timeout
UnixDatagram::read_timeout
UnixDatagram::write_timeout
UnixDatagram::set_nonblocking
UnixDatagram::take_error
UnixDatagram::shutdown
RawFd impls for UnixDatagram
{BTree,Hash}Map::values_mut
<[_]>::binary_search_by_key

Deprecated:

StaticCondvar - this, and all other static synchronization primitives
below, are usable today through the lazy-static crate on
stable Rust today. Additionally, we'd like the non-static
versions to be directly usable in a static context one day,
so they're unlikely to be the final forms of the APIs in any
case.
CONDVAR_INIT
StaticMutex
MUTEX_INIT
StaticRwLock
RWLOCK_INIT
iter::Peekable::is_empty

Closes#27717
Closes#27720
Closes#30014
Closes#30425
Closes#30449
Closes#31190
Closes#31399
Closes#31767
Closes#32111
Closes#32281
Closes#32312
Closes#32551
Closes#33018

rust-highfive · 2016-05-17T22:03:49Z

r? @brson

(rust_highfive has picked a reviewer for you, use r? to override)

alexcrichton · 2016-05-17T22:03:53Z

Still working through the tests, but this should have all the real meat.

r? @aturon
cc @rust-lang/libs

futile · 2016-05-18T15:46:23Z

are the feature and the version here correct?

Good catch!

alexcrichton · 2016-05-19T23:08:44Z

@SimonSapin brings up that write_utf{8,16} could possibly panic instead of returning a result.

sfackler · 2016-05-19T23:35:24Z

I think I like that approach given that there's an obvious and reasonable upper bound on the buffer size.

alexcrichton · 2016-05-20T18:39:25Z

I personally feel that it's inconsistent with how we handle encoding/decoding everywhere else, which is to use a result instead of panicking

SimonSapin · 2016-05-20T19:16:02Z

@alexcrichton what APIs and errors are you thinking of, specifically? Providing a buffer smaller than four bytes or two 16-bit units is a different kind of error than, for example, the input containing ill-formed byte sequences. It’s easy to use something like [u8; 4] or vec.reserve(4), while many programs deal with unpredictable input.

And, as I argued in #27784 (comment), would callers ever do anything other than .unwrap() that Result?

alexcrichton · 2016-05-20T21:41:12Z

The major examples are str::from_utf8 and String::from_utf16. I could imagine that callers may not be moving into a stack-local buffer (but perhaps a Vec) and they want to optimize a path where something is one byte or less (or something like that).

SimonSapin · 2016-05-21T08:53:49Z

These examples don’t take a caller-provided buffer, so the "buffer too short" kind of error doesn’t happen there.

If the caller of char::write_utf8 / char::write_utf16 wants an exact size rather than an upper bound, they can use char::len_utf8 / char::len_utf16.

alexcrichton · 2016-05-22T18:28:51Z

Yes they're only analogous in the sense that they don't panic, they return results on encoding/decoding operations. The buffer may not always be controlled by the caller, but some utility function would be given a buffer from elsewhere in which case it'd just always have to perform this validation. Essentially you will 100% of the time need this check for length unless you're calling with a buffer you created yourself, and that's probably not 100% of use cases.

SimonSapin · 2016-05-22T21:53:50Z

Outside of tests, rust-lang/rust currently contains 9 uses of encode_utf8 that would be replaced with write_utf8:

3 (in collections::string) extend a Vec<u8>, so they could use either vec.reserve(4) or vec.reserve(c.len_utf8()).
6 (in core::fmt, serialize::json, and std::sys::common::wtf8) then use str::from_utf8_unchecked, they could use a [u8; 4] buffer.

100% would statically ensure they provide a large enough buffer to write_utf8.

(I found zero usage in Servo and its dependencies that I’ve ever checked out. When #[unstable] was introduced we replaced them with write! into a [u8; 4] buffer.)

I really don’t see a scenario where "some utility function given a buffer from elsewhere" would be useful.

aturon · 2016-05-23T03:12:51Z

I agree with @SimonSapin here, a too-short buffer seems reasonable to treat as a contract violation.

alexcrichton · 2016-05-23T06:06:31Z

I'd be pretty uncomfortable stabilizing an API with a brand new name, new semantics, and a new return type all at once. This may also miss the beta branch now and need to be backported. Shall we just leave it out for another round?

alexcrichton · 2016-05-23T15:01:03Z

Ok, I've backed out those API additions, re-r? @aturon

aturon · 2016-05-23T15:23:05Z

@alexcrichton I've reviewed the rest of the PR (LGTM), but I don't see the updates backing out these recent additions.

alexcrichton · 2016-05-23T15:32:10Z

@bors: r=aturon 91e8b4c57eafc0b4dc577bfab6a2685e635c9bed

bors · 2016-05-23T15:32:12Z

🙀 91e8b4c57eafc0b4dc577bfab6a2685e635c9bed is not a valid commit SHA. Please try again with 7c03658.

alexcrichton · 2016-05-23T16:41:05Z

@bors: r=aturon 91e8b4c57eafc0b4dc577bfab6a2685e635c9bed

bors · 2016-05-23T19:21:57Z

⌛ Testing commit 91e8b4c with merge b07d438...

bors · 2016-05-23T19:26:51Z

💔 Test failed - auto-mac-64-opt

alexcrichton · 2016-05-24T05:55:41Z

@bors: r=aturon

bors · 2016-05-24T05:55:42Z

📌 Commit 04eff6c has been approved by aturon

bors · 2016-05-24T06:53:09Z

⌛ Testing commit 04eff6c with merge 05765aa...

bors · 2016-05-24T08:03:01Z

💔 Test failed - auto-win-gnu-32-opt-rustbuild

This commit applies the FCP decisions made by the libs team for the 1.10 cycle, including both new stabilizations and deprecations. Specifically, the list of APIs is: Stabilized: * `os::windows::fs::OpenOptionsExt::access_mode` * `os::windows::fs::OpenOptionsExt::share_mode` * `os::windows::fs::OpenOptionsExt::custom_flags` * `os::windows::fs::OpenOptionsExt::attributes` * `os::windows::fs::OpenOptionsExt::security_qos_flags` * `os::unix::fs::OpenOptionsExt::custom_flags` * `sync::Weak::new` * `Default for sync::Weak` * `panic::set_hook` * `panic::take_hook` * `panic::PanicInfo` * `panic::PanicInfo::payload` * `panic::PanicInfo::location` * `panic::Location` * `panic::Location::file` * `panic::Location::line` * `ffi::CStr::from_bytes_with_nul` * `ffi::CStr::from_bytes_with_nul_unchecked` * `ffi::FromBytesWithNulError` * `fs::Metadata::modified` * `fs::Metadata::accessed` * `fs::Metadata::created` * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange` * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak` * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key` * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}` * `SocketAddr::is_unnamed` * `SocketAddr::as_pathname` * `UnixStream::connect` * `UnixStream::pair` * `UnixStream::try_clone` * `UnixStream::local_addr` * `UnixStream::peer_addr` * `UnixStream::set_read_timeout` * `UnixStream::set_write_timeout` * `UnixStream::read_timeout` * `UnixStream::write_Timeout` * `UnixStream::set_nonblocking` * `UnixStream::take_error` * `UnixStream::shutdown` * Read/Write/RawFd impls for `UnixStream` * `UnixListener::bind` * `UnixListener::accept` * `UnixListener::try_clone` * `UnixListener::local_addr` * `UnixListener::set_nonblocking` * `UnixListener::take_error` * `UnixListener::incoming` * RawFd impls for `UnixListener` * `UnixDatagram::bind` * `UnixDatagram::unbound` * `UnixDatagram::pair` * `UnixDatagram::connect` * `UnixDatagram::try_clone` * `UnixDatagram::local_addr` * `UnixDatagram::peer_addr` * `UnixDatagram::recv_from` * `UnixDatagram::recv` * `UnixDatagram::send_to` * `UnixDatagram::send` * `UnixDatagram::set_read_timeout` * `UnixDatagram::set_write_timeout` * `UnixDatagram::read_timeout` * `UnixDatagram::write_timeout` * `UnixDatagram::set_nonblocking` * `UnixDatagram::take_error` * `UnixDatagram::shutdown` * RawFd impls for `UnixDatagram` * `{BTree,Hash}Map::values_mut` * `<[_]>::binary_search_by_key` Deprecated: * `StaticCondvar` - this, and all other static synchronization primitives below, are usable today through the lazy-static crate on stable Rust today. Additionally, we'd like the non-static versions to be directly usable in a static context one day, so they're unlikely to be the final forms of the APIs in any case. * `CONDVAR_INIT` * `StaticMutex` * `MUTEX_INIT` * `StaticRwLock` * `RWLOCK_INIT` * `iter::Peekable::is_empty` Closesrust-lang#27717Closesrust-lang#27720 cc rust-lang#27784 (but encode methods still exist) Closesrust-lang#30014Closesrust-lang#30425Closesrust-lang#30449Closesrust-lang#31190Closesrust-lang#31399Closesrust-lang#31767Closesrust-lang#32111Closesrust-lang#32281Closesrust-lang#32312Closesrust-lang#32551Closesrust-lang#33018

alexcrichton · 2016-05-24T16:00:51Z

@bors: r=aturon

bors · 2016-05-24T16:00:52Z

📌 Commit cae91d7 has been approved by aturon

bors · 2016-05-25T14:23:01Z

⌛ Testing commit cae91d7 with merge 07399eb...

bors · 2016-05-25T16:40:04Z

💔 Test failed - auto-win-gnu-32-opt-rustbuild

alexcrichton · 2016-05-25T16:56:30Z

@bors: retry

Praying that's spurious, I'll open an issue if I see it again

bors · 2016-05-25T22:38:21Z

⌛ Testing commit cae91d7 with merge 991b0fa...

bors · 2016-05-25T23:53:04Z

💔 Test failed - auto-win-msvc-64-opt

alexcrichton · 2016-05-26T00:16:17Z

@bors: retry

real failure - http://buildbot.rust-lang.org/builders/auto-win-gnu-32-opt-rustbuild/builds/1219/steps/test/logs/stdio

Spurious "filename too long" failure on bots #33844

bors · 2016-05-26T03:36:10Z

⌛ Testing commit cae91d7 with merge d5759a3...

std: Stabilize APIs for the 1.10 release This commit applies the FCP decisions made by the libs team for the 1.10 cycle, including both new stabilizations and deprecations. Specifically, the list of APIs is: Stabilized: * `os::windows::fs::OpenOptionsExt::access_mode` * `os::windows::fs::OpenOptionsExt::share_mode` * `os::windows::fs::OpenOptionsExt::custom_flags` * `os::windows::fs::OpenOptionsExt::attributes` * `os::windows::fs::OpenOptionsExt::security_qos_flags` * `os::unix::fs::OpenOptionsExt::custom_flags` * `sync::Weak::new` * `Default for sync::Weak` * `panic::set_hook` * `panic::take_hook` * `panic::PanicInfo` * `panic::PanicInfo::payload` * `panic::PanicInfo::location` * `panic::Location` * `panic::Location::file` * `panic::Location::line` * `ffi::CStr::from_bytes_with_nul` * `ffi::CStr::from_bytes_with_nul_unchecked` * `ffi::FromBytesWithNulError` * `fs::Metadata::modified` * `fs::Metadata::accessed` * `fs::Metadata::created` * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange` * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak` * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key` * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}` * `SocketAddr::is_unnamed` * `SocketAddr::as_pathname` * `UnixStream::connect` * `UnixStream::pair` * `UnixStream::try_clone` * `UnixStream::local_addr` * `UnixStream::peer_addr` * `UnixStream::set_read_timeout` * `UnixStream::set_write_timeout` * `UnixStream::read_timeout` * `UnixStream::write_Timeout` * `UnixStream::set_nonblocking` * `UnixStream::take_error` * `UnixStream::shutdown` * Read/Write/RawFd impls for `UnixStream` * `UnixListener::bind` * `UnixListener::accept` * `UnixListener::try_clone` * `UnixListener::local_addr` * `UnixListener::set_nonblocking` * `UnixListener::take_error` * `UnixListener::incoming` * RawFd impls for `UnixListener` * `UnixDatagram::bind` * `UnixDatagram::unbound` * `UnixDatagram::pair` * `UnixDatagram::connect` * `UnixDatagram::try_clone` * `UnixDatagram::local_addr` * `UnixDatagram::peer_addr` * `UnixDatagram::recv_from` * `UnixDatagram::recv` * `UnixDatagram::send_to` * `UnixDatagram::send` * `UnixDatagram::set_read_timeout` * `UnixDatagram::set_write_timeout` * `UnixDatagram::read_timeout` * `UnixDatagram::write_timeout` * `UnixDatagram::set_nonblocking` * `UnixDatagram::take_error` * `UnixDatagram::shutdown` * RawFd impls for `UnixDatagram` * `{BTree,Hash}Map::values_mut` * `<[_]>::binary_search_by_key` Deprecated: * `StaticCondvar` - this, and all other static synchronization primitives below, are usable today through the lazy-static crate on stable Rust today. Additionally, we'd like the non-static versions to be directly usable in a static context one day, so they're unlikely to be the final forms of the APIs in any case. * `CONDVAR_INIT` * `StaticMutex` * `MUTEX_INIT` * `StaticRwLock` * `RWLOCK_INIT` * `iter::Peekable::is_empty` Closes#27717Closes#27720Closes#30014Closes#30425Closes#30449Closes#31190Closes#31399Closes#31767Closes#32111Closes#32281Closes#32312Closes#32551Closes#33018

bors · 2016-05-26T06:49:09Z

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-32cross-opt, auto-linux-64-cargotest, auto-linux-64-cross-armhf, auto-linux-64-cross-armsf, auto-linux-64-cross-freebsd, auto-linux-64-cross-netbsd, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-opt-mir, auto-linux-64-opt-rustbuild, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-mac-64-opt-rustbuild, auto-mac-cross-ios-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-32-opt-rustbuild, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-cross-opt, auto-win-msvc-32-opt, auto-win-msvc-64-cargotest, auto-win-msvc-64-opt, auto-win-msvc-64-opt-mir, auto-win-msvc-64-opt-rustbuild

alexcrichton · 2016-05-26T16:22:42Z

Tagging beta nominated/accepted to ensure we backport

rust-highfive assigned brson May 17, 2016

rust-highfive assigned aturon and unassigned brson May 17, 2016

futile reviewed May 18, 2016
View reviewed changes

alexcrichton force-pushed the stabilize-1.10 branch 3 times, most recently from 2e3600c to 7c03658Compare May 18, 2016 23:02

alexcrichton force-pushed the stabilize-1.10 branch from 7c03658 to 91e8b4cCompare May 23, 2016 15:35

alexcrichton force-pushed the stabilize-1.10 branch from 91e8b4c to 804f23fCompare May 23, 2016 19:41

alexcrichton force-pushed the stabilize-1.10 branch from 04eff6c to cae91d7Compare May 24, 2016 16:00

bors merged commit cae91d7 into rust-lang:masterMay 26, 2016

This was referenced May 26, 2016
Implement count for EscapeUnicode#33849
Merged
rustfmt libcoretest #33790
Closed

alexcrichton deleted the stabilize-1.10 branch May 26, 2016 16:22

alexcrichton added beta-nominated Nominated for backporting to the compiler in the beta channel. beta-accepted Accepted for backporting to the compiler in the beta channel. labels May 26, 2016

alexcrichton mentioned this pull request May 26, 2016
Backport API stabilizations and an FFI fix #33883
Merged

alexcrichton removed the beta-nominated Nominated for backporting to the compiler in the beta channel. label Jun 20, 2016

killercup mentioned this pull request Jul 30, 2016
Rust 1.10 stabilised {Occupied,Vacant,}Entry::key diesel-rs/diesel#388
Closed

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