Rust 1.11.0

Language

--------

* Support nested cfg_attr attributes

* Allow statement-generating braced macro invocations at the end of blocks

* Macros can be expanded inside of trait definitions

* #[macro_use] works properly when it is itself expanded from a macro

Stabilized APIs

---------------

* BinaryHeap::append

* BTreeMap::append

* BTreeMap::split_off

* BTreeSet::append

* BTreeSet::split_off

* f32::to_degrees

(in libcore - previously stabilized in libstd)

* f32::to_radians

(in libcore - previously stabilized in libstd)

* f64::to_degrees

(in libcore - previously stabilized in libstd)

* f64::to_radians

(in libcore - previously stabilized in libstd)

* Iterator::sum

* Iterator::product

* Cell::get_mut

* RefCell::get_mut

Libraries

---------

* The thread_local! macro supports multiple definitions in a single

invocation, and can apply attributes

* Cow implements Default

* Wrapping implements binary, octal, lower-hex and upper-hex

Display formatting

* The range types implement Hash

* lookup_host ignores unknown address types

* assert_eq! accepts a custom error message, like assert! does

* The main thread is now called "main" instead of "<main>"

Cargo

-----

* Disallow specifying features of transitive deps

* Add color support for Windows consoles

* Fix harness = false on [lib] sections

* Don't panic when links contains a '.'

* Build scripts can emit warnings,

and -vv prints warnings for all crates.

* Ignore file locks on OS X NFS mounts

* Don't warn about package.metadata keys.

This provides room for expansion by arbitrary tools.

* Add support for cdylib crate types

* Prevent publishing crates when files are dirty

* Don't fetch all crates on clean

* Propagate --color option to rustc

* Fix cargo doc --open on Windows

* Improve autocompletion

* Configure colors of stderr as well as stdout

Performance

-----------

* Caching projections speeds up type check dramatically for some

workloads

* The default HashMap hasher is SipHash 1-3 instead of SipHash 2-4

This hasher is faster, but is believed to provide sufficient

protection from collision attacks.

* Comparison of Ipv4Addr is 10x faster

Rustdoc

-------

* Fix empty implementation section on some module pages

* Fix inlined renamed re-exports in import lists

* Fix search result layout for enum variants and struct fields

* Fix issues with source links to external crates

* Fix redirect pages for renamed re-exports

Tooling

-------

* rustc is better at finding the MSVC toolchain

* When emitting debug info, rustc emits frame pointers for closures,

shims and glue, as it does for all other functions

* rust-lldb warns about unsupported versions of LLDB

* Many more errors have been given error codes and extended

explanations

* API documentation continues to be improved, with many new examples

Misc

----

* rustc no longer hangs when dependencies recursively re-export

submodules

* rustc requires LLVM 3.7+

* The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was

rewritten

* rustc support 16-bit pointer sizes.

No targets use this yet, but it works toward AVR support.

Compatibility Notes

-------------------

* consts and statics may not have unsized types

* The new follow-set rules that place restrictions on macro_rules!

in order to ensure syntax forward-compatibility have been enabled

This was an amendment to RFC 550,

and has been a warning since 1.10.

* cfg attribute process has been refactored to fix various bugs.

This causes breakage in some corner cases.