Hello and welcome to another issue of This Week in Rust. We're gearing up for the 0.8 release in 2-3 weeks. It looks like it's going to be a really solid release. I'll write another State of Rust, hopefully before it is released.

What's cooking in master?

68 PRs were merged this week.

Breaking changes

• std::iterator has been renamed to std::iter.
• The std::num::Primitive trait is now constrained by the Clone and DeepClone traits, as well as Orderable.
• Some more free functions have been removed from std::vec. unzip now takes an iterator, a Permutations iterator has been added, and some rarely-used, obsolete, functions were removed.
• A bunch of changes to Option and Result were made. Specifically, chain was changed to and_then and unwrap_or_default to unwrap_or.
• rustpkg builds into target-specific subdirectories now.

Additions and fixes

• debuginfo now has namespace support. Looking at all the various PRs Michael has opened over the summer, it seems DWARF is a very flexible, nice debuginfo format, but gdb and LLVM don't support it very well.
• Correct range_step and range_step_inclusive iterators have been added. They are correct in cases of overflow, and are generic.
• A handy sleep function has been added to newrt.
• File IO in newrt works on windows now.
• A bug where nested items in a default method weren't compiled has been fixed.
• A rendezvous concurrency structure, much like Ada's, has been added.
• Buffered IO wrappers have been added.
• nmatsakis landed a PR that closed 7 issues at once.
• rustpkg now uses extra::workcache to prevent recompilation of already-compiled crates.

Meeting

The Tuesday meeting discussed the github commit policy, implicit copyability, patterns, and the fate of &const.

Other things

• Eric Reed (ecr)'s intern presentation: An I/O System for Rust. Unfortunately, the audio cuts out.
• Evict-BT, a git-integrated issue tracker.
• Computer Graphics and Game Development. Also note the #rust-gamedev channel.
• rust-for-real, a collection of Rust examples to aid in learning. Needs more examples!