2015-06-02.md

Subteam report: libs 2015-06-02

Highlights

The following RFCs are entering their final comment period:

• FCP PR #1105: RFC: Policy on semver and API evolution
• FCP PR #1119: Quick draft "Result::expect" rfc
• FCP PR #1123: RFC: introduce split_at(mid: usize) on str
• FCP PR #1034: RFC: Deprecate Iterator::size_hint and ExactSizeIterator for better named alternatives.
  • Extended from last week

The following features are entering their final comment period for stabilization:

• FCP PR #25844: std: Stabilize a number of new fs features

Last week we had a few RFCs in final comment period; here's what happened:

• PR #583: Add fmt size_hints
  • Closed.
• PR #590: Early trait bounds on generic types
  • Closed
• PR #839: Have collections impl Extend<&T> where T: Copy
  • Merged
• PR #1014: Don't panic when stdout doesn't exist
  • Merged
• PR #1034: RFC: Deprecate Iterator::size_hint and ExactSizeIterator for better named alternatives.
  • Kept open for further discussion; see the related policy thread.

There were also some important discuss threads for library policy, which are ongoing:

• Thoughts on aggressive deprecation in std
• What should go into the standard library?
• The life and death of an API

Dashboard

RFC phase

• PR #770: io error handling design
• PR #980: RFC for read_all
• PR #1015: Add read_into_buf and get_buf to BufRead
• PR #1036: Add Builder guidelines
• PR #1055: RFC for redirecting stdio of child processes to open file handles
• PR #1058: RFC for replacing slice::tail()/init() with new methods
• PR #1084: RFC: Scoped threads, take 2
• PR #1095: Add unsafe Option::unwrap_unchecked()
• PR #1100: allow customization of the output of panic!() to stderr with 'panic handlers'
• PR #1102: Rename connect to join
• PR #1126: stabilize TcpStream::set_keepalive
• PR #1130: Implement FromIterator for the unit type
• FCP PR #1034: RFC: Deprecate Iterator::size_hint and ExactSizeIterator for better named alternatives.
• FCP PR #1105: RFC: Policy on semver and API evolution
• FCP PR #1119: Quick draft "Result::expect" rfc
• FCP PR #1123: RFC: introduce split_at(mid: usize) on str

Implementation phase

• Issue #25976: Implement Extend<&T> where T: Copy for collections
• Issue #25977: Don't panic when stdout doesn't exist
• FCP PR #25844: std: Stabilize a number of new fs features

High priority issues

Needs decision

• Issue #21846: Revert "remove Copy impls from remaining iterators"
• Issue #24689: Add a write_char method to std::fmt::Formatter.
• Issue #25319: implement fmt traits for collections
• Issue #25471: Optimize &Iterator::nth
• Issue #25572: Flush stdout on read from stdin again
• Issue #25646: Make align_of behave like min_align_of.
• Issue #25777: Add a way to return allocated strings to C and then free them later
• Issue #25780: Expose some more functions from libc
• Issue #25798: Stabilize step_by for 1.2.0