[rust-dev] This Week in Rust
corey at octayn.net
Sun Oct 13 00:31:01 PDT 2013
Welcome to another issue of *This Week in Rust*. This week introduces raw
string literals, the removal of the `rust` tool, feature gating, and the
# What's cooking on master?
Only 51 PRs were merged this week, though the ones that were were fairly
## Breaking changes
- Visibility and privacy have been defined, and the new semantics are slightly
incompatible with the old. The details are
- Feature gating has been [added to the
compiler](https://github.com/mozilla/rust/pull/9703). This allows us to
mask language features that we don't want to commit to for 1.0. The compiler
will tell you when you are using an "experimental" feature. The current
experimentals are glob imports, macro definitions, and struct-like variants
in enums. This is an important step forward for 1.0 which,
is right around the corner.
- The `rust` tool [has been
- `Option`'s API has been [massively
simplified](https://github.com/mozilla/rust/pull/9359), and changed to be
- Strings are [no longer allowed to be modified in safe
code](https://github.com/mozilla/rust/pull/9750). Things like `let s =
~"abcdefg"; s = 0x99;` are now rejected. This is because it allows one to
create invalid (non-UTF8) string values.
- `extra::rc` has [graduated to
- `extra::tempfile::mkdtemp` [has been replaced with an RAII
- `std::rand` [has been improved](https://github.com/mozilla/rust/pull/9695),
but changes the public API of Rng a bit.
- `IntConvertible` has been removed in favor of [`ToPrimitive` and
`FromPrimitive`](https://github.com/mozilla/rust/pull/9250), which can be
derived for enums, making interacting with C APIs substantially more
## Other changes
- [Raw strings](https://github.com/mozilla/rust/pull/9674) are now supported.
The basic syntax is `r"Foo"`, but also `r###"Foo"###`, for arbitrary
nesting of raw strings.
- rustpkg's remote fetching [is
fixed](https://github.com/mozilla/rust/pull/9741), but [other
problems](https://github.com/mozilla/rust/issues/9482) prevent it from being
fully usable right now.
- debuginfo namespace handling [has been
unified](https://github.com/mozilla/rust/pull/9658), and marks the ability
to build all of Rust (libstd, libextra, compiler and tools) with debuginfo,
which is very awesome.
- Small structs [are immediate](https://github.com/mozilla/rust/pull/9759).
- When there are unbalanced delimiters, [the opening delimiters leading up to
it](https://github.com/mozilla/rust/pull/9756) are printed, avoiding the
"Expected a }, saw EOF at line 9001" problem.
- libuv and jemalloc are only [built once, rather than once per
- Macros [now take attributes](https://github.com/mozilla/rust/pull/9753) and,
in turn, can be documented.
- In the opposite direction, [macros can now expand to items with
- There were some [minor logging
changes](https://github.com/mozilla/rust/pull/9664), the biggest result of
which is that inlined functions won't be logged by the modules they're
- [`std::rt::io::native` has been
implemented](https://github.com/mozilla/rust/pull/9749). The idea of this is
to live in `std::io::native` and to use the OS's native APIs rather than
libuv, and also to not require the scheduler or any other runtime support.
- rustpkg [marks checked out repos as
read-only](https://github.com/mozilla/rust/pull/9732), to prevent
# Weekly Meeting
discussed some administrative things, the removal of crypto code, the removal
of the `rust` tool, and functions.
# Announcements etc
\- a FUSE userspace library in Rust. This is pure Rust, not using libfuse.
\- a simple library for playing sounds.
- [rustic](https://github.com/pcmattman/rustic) - another operating system
- [Refactoring the milestones on the issue
- [Fn Types in Rust, Take
\- another attempt at tackling the problems with closures.
- mcpherrin in `#rust` says "Hello, everyone!"
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