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Merge the release notes for 1.0.0-beta and 1.0.0
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brson committed May 7, 2015
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142 changes: 62 additions & 80 deletions RELEASES.md
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Version 1.0.0 (May 2015)
========================

* ~420 changes, numerous bugfixes

Highlights
----------

* Most of the standard library is now stable and will not change.
* The vast majority of the standard library is now `#[stable]`. It is
no longer possible to use unstable features with a stable build of
the compiler.
* Many popular crates on [crates.io] now work on the stable release
channel.
* Arithmetic on basic integer types now [checks for overflow in debug
builds][overflow].

Language
--------
Expand All @@ -25,6 +29,30 @@ Language
bar`, and Cargo now automatically translates "-" in *package* names
to "_" for the crate name][cr].
* [Lifetime shadowing is an error][lt].
* [`Send` no longer implies `'static`][send-rfc], which made possible
the [`thread::scoped` API][scoped]. Scoped threads can borrow data
from their parent's stack frame -- safely!
* [UFCS now supports trait-less associated paths][moar-ufcs] like
`MyType::default()`.
* Primitive types [now have inherent methods][prim-inherent],
obviating the need for extension traits like `SliceExt`.
* Methods with `Self: Sized` in their `where` clause are [considered
object-safe][self-sized], allowing many extension traits like
`IteratorExt` to be merged into the traits they extended.
* You can now [refer to associated types][assoc-where] whose
corresponding trait bounds appear only in a `where` clause.
* The final bits of [OIBIT landed][oibit-final], meaning that traits
like `Send` and `Sync` are now library-defined.
* A [Reflect trait][reflect] was introduced, which means that
downcasting via the `Any` trait is effectively limited to concrete
types. This helps retain the potentially-important "parametricity"
property: generic code cannot behave differently for different type
arguments except in minor ways.
* The `unsafe_destructor` feature is now deprecated in favor of the
[new `dropck`][dropck]. This change is a major reduction in unsafe
code.
* Trait coherence was [revised again][fundamental], this time with an
eye toward API evolution over time.

Libraries
---------
Expand Down Expand Up @@ -56,6 +84,31 @@ Libraries
`split_whitespace`, to avoid answering the tricky question, 'what is
a word?'][sw].

* The new path and IO modules are complete and `#[stable]`. This
was the major library focus for this cycle.
* The path API was [revised][path-normalize] to normalize `.`,
adjusting the tradeoffs in favor of the most common usage.
* A large number of remaining APIs in `std` were also stabilized
during this cycle; about 75% of the non-deprecated API surface
is now stable.
* The new [string pattern API][string-pattern] landed, which makes
the string slice API much more internally consistent and flexible.
* A shiny [framework for Debug implementations][debug-builder] landed.
This makes it possible to opt in to "pretty-printed" debugging output.
* A new set of [generic conversion traits][conversion] replaced
many existing ad hoc traits.
* Generic numeric traits were [completely removed][num-traits]. This
was made possible thanks to inherent methods for primitive types,
and the removal gives maximal flexibility for designing a numeric
hierarchy in the future.
* The `Fn` traits are now related via [inheritance][fn-inherit]
and provide ergonomic [blanket implementations][fn-blanket].
* The `Index` and `IndexMut` traits were changed to
[take the index by value][index-value], enabling code like
`hash_map["string"]` to work.
* `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
`Copy` data is known to be `Clone` as well.

Misc
----

Expand All @@ -65,7 +118,12 @@ Misc
documentation.
* rustdoc has received a number of improvements focused on completion
and polish.
* Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
* Much headway was made on ecosystem-wide CI, making it possible
to [compare builds for breakage][ci-compare].


[crates.io]: http://crates.io
[clo]: https://github.com/rust-lang/rust/pull/24034
[coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
[con]: https://github.com/rust-lang/rust/pull/23875
Expand All @@ -83,83 +141,6 @@ Misc
[spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
[sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
[th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md

Version 1.0.0-beta (April 2015)
===============================

* ~1100 changes, numerous bugfixes

* Highlights

* The big news is that the vast majority of the standard library
is now `#[stable]` -- 75% of the non-deprecated API surface at
last count. Numerous crates are now running on stable
Rust. Starting with this release, it is not possible to use
unstable features on a stable build.
* Arithmetic on basic integer types now
[checks for overflow in debug builds][overflow].

* Language

* [`Send` no longer implies `'static`][send-rfc], which made
possible the [`thread::scoped` API][scoped]. Scoped threads can
borrow data from their parent's stack frame -- safely!
* [UFCS now supports trait-less associated paths][moar-ufcs] like
`MyType::default()`.
* Primitive types [now have inherent methods][prim-inherent],
obviating the need for extension traits like `SliceExt`.
* Methods with `Self: Sized` in their `where` clause are
[considered object-safe][self-sized], allowing many extension
traits like `IteratorExt` to be merged into the traits they
extended.
* You can now [refer to associated types][assoc-where] whose
corresponding trait bounds appear only in a `where` clause.
* The final bits of [OIBIT landed][oibit-final], meaning that
traits like `Send` and `Sync` are now library-defined.
* A [Reflect trait][reflect] was introduced, which means that
downcasting via the `Any` trait is effectively limited to
concrete types. This helps retain the potentially-important
"parametricity" property: generic code cannot behave differently
for different type arguments except in minor ways.
* The `unsafe_destructor` feature is now deprecated in favor of
the [new `dropck`][dropck]. This change is a major reduction in
unsafe code.
* Trait coherence was [revised again][fundamental], this time with
an eye toward API evolution over time.

* Libraries

* The new path and IO modules are complete and `#[stable]`. This
was the major library focus for this cycle.
* The path API was [revised][path-normalize] to normalize `.`,
adjusting the tradeoffs in favor of the most common usage.
* A large number of remaining APIs in `std` were also stabilized
during this cycle; about 75% of the non-deprecated API surface
is now stable.
* The new [string pattern API][string-pattern] landed, which makes
the string slice API much more internally consistent and flexible.
* A shiny [framework for Debug implementations][debug-builder] landed.
This makes it possible to opt in to "pretty-printed" debugging output.
* A new set of [generic conversion traits][conversion] replaced
many existing ad hoc traits.
* Generic numeric traits were
[completely removed][num-traits]. This was made possible thanks
to inherent methods for primitive types, and the removal gives
maximal flexibility for designing a numeric hierarchy in the future.
* The `Fn` traits are now related via [inheritance][fn-inherit]
and provide ergonomic [blanket implementations][fn-blanket].
* The `Index` and `IndexMut` traits were changed to
[take the index by value][index-value], enabling code like
`hash_map["string"]` to work.
* `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
`Copy` data is known to be `Clone` as well.

* Infrastructure

* Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
* Much headway was made on ecosystem-wide CI, making it possible
to [compare builds for breakage][ci-compare].

[send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
[scoped]: http://static.rust-lang.org/doc/master/std/thread/fn.scoped.html
[moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
Expand All @@ -183,6 +164,7 @@ Version 1.0.0-beta (April 2015)
[copy-clone]: https://github.com/rust-lang/rust/pull/23860
[path-normalize]: https://github.com/rust-lang/rust/pull/23229


Version 1.0.0-alpha.2 (February 2015)
-------------------------------------

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1 comment on commit 1adc98c

@tshepang
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why merge notes of these (distinct) releases

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