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Stabilize extern_crate_self #57407
Stabilize extern_crate_self #57407
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☔ The latest upstream changes (presumably #57332) made this pull request unmergeable. Please resolve the merge conflicts. |
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Looks good; the version needs to be adjusted tho.
Stabilization reportr? @Centril I propose that we stabilize @rfcbot merge History
MotivationTo resolve #54647 (and so that proc macro crates can migrate to 2018). Also see #56409 (comment). As noted in #55275 (comment), this solution doesn't introduce any new syntax and has minimal maintenance cost. What is stabilizedSuppose that we have the following item in the current crate: fn the_answer() -> usize { 42 } It now becomes semantically possible (test) (it already was syntactically possible) to write Since You may also write:
What is not stabilized:
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Team member @Centril has proposed to merge this. The next step is review by the rest of the tagged teams:
No concerns currently listed. Once a majority of reviewers approve (and none object), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up! See this document for info about what commands tagged team members can give me. |
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Thanks for walking me through this @Centril. |
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Some minor style nits; it looks great otherwise.
src/test/ui/imports/extern-crate-self/extern-crate-self-macro-alias.rs
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src/test/ui/imports/extern-crate-self/extern-crate-self-macro-item.rs
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src/test/ui/imports/extern-crate-self/extern-crate-self-macro-self.rs
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🔔 This is now entering its final comment period, as per the review above. 🔔 |
@Centril What's the next step here? |
@mehcode Waiting ~two days; after that I'll r+ :) |
Thanks for the clarification. Read somewhere FCP was 7 days so I was confused. |
Hehe ;) It's 10 days. The bot will add a comment when FCP is done. |
Using the 2015 edition until rust-lang/rust#57407 is merged, so that the derive macro can be used within the crate (for tests)
The final comment period, with a disposition to merge, as per the review above, is now complete. |
@bors r+ |
📌 Commit 09d073a has been approved by |
@mehcode you're not the only one: rust-lang/rfcs#1981 |
…, r=Centril Stabilize extern_crate_self Fixes rust-lang#56409
Rollup of 7 pull requests Successful merges: - #57407 (Stabilize extern_crate_self) - #57703 (Make MutexGuard's Debug implementation more useful.) - #57764 (Fix some minor warnings) - #57825 (un-deprecate mem::zeroed) - #57827 (Ignore aarch64 in simd-intrinsic-generic-reduction) - #57908 (resolve: Fix span arithmetics in the import conflict error) - #57913 (Change crate-visibility-modifier issue number in The Unstable Book) Failed merges: r? @ghost
Pkgsrc changes: * Bump required rust version to build to 1.33.0. * Adapt patches to changed file locations. * (I worry about 32-bit ports, now that Atomic64 apparently is First-Class; this has been built on NetBSD/amd64 so far) Upstream changes: Version 1.34.0 (2019-04-11) ========================== Language -------- - [You can now use `#[deprecated = "reason"]`][58166] as a shorthand for `#[deprecated(note = "reason")]`. This was previously allowed by mistake but had no effect. - [You can now accept token streams in `#[attr()]`,`#[attr[]]`, and `#[attr{}]` procedural macros.][57367] - [You can now write `extern crate self as foo;`][57407] to import your crate's root into the extern prelude. Compiler -------- - [You can now target `riscv64imac-unknown-none-elf` and `riscv64gc-unknown-none-elf`.][58406] - [You can now enable linker plugin LTO optimisations with `-C linker-plugin-lto`.][58057] This allows rustc to compile your Rust code into LLVM bitcode allowing LLVM to perform LTO optimisations across C/C++ FFI boundaries. - [You can now target `powerpc64-unknown-freebsd`.][57809] Libraries --------- - [The trait bounds have been removed on some of `HashMap<K, V, S>`'s and `HashSet<T, S>`'s basic methods.][58370] Most notably you no longer require the `Hash` trait to create an iterator. - [The `Ord` trait bounds have been removed on some of `BinaryHeap<T>`'s basic methods.][58421] Most notably you no longer require the `Ord` trait to create an iterator. - [The methods `overflowing_neg` and `wrapping_neg` are now `const` functions for all numeric types.][58044] - [Indexing a `str` is now generic over all types that implement `SliceIndex<str>`.][57604] - [`str::trim`, `str::trim_matches`, `str::trim_{start, end}`, and `str::trim_{start, end}_matches` are now `#[must_use]`][57106] and will produce a warning if their returning type is unused. - [The methods `checked_pow`, `saturating_pow`, `wrapping_pow`, and `overflowing_pow` are now available for all numeric types.][57873] These are equivalvent to methods such as `wrapping_add` for the `pow` operation. Stabilized APIs --------------- #### std & core * [`Any::type_id`] * [`Error::type_id`] * [`atomic::AtomicI16`] * [`atomic::AtomicI32`] * [`atomic::AtomicI64`] * [`atomic::AtomicI8`] * [`atomic::AtomicU16`] * [`atomic::AtomicU32`] * [`atomic::AtomicU64`] * [`atomic::AtomicU8`] * [`convert::Infallible`] * [`convert::TryFrom`] * [`convert::TryInto`] * [`iter::from_fn`] * [`iter::successors`] * [`num::NonZeroI128`] * [`num::NonZeroI16`] * [`num::NonZeroI32`] * [`num::NonZeroI64`] * [`num::NonZeroI8`] * [`num::NonZeroIsize`] * [`slice::sort_by_cached_key`] * [`str::escape_debug`] * [`str::escape_default`] * [`str::escape_unicode`] * [`str::split_ascii_whitespace`] #### std * [`Instant::checked_add`] * [`Instant::checked_sub`] * [`SystemTime::checked_add`] * [`SystemTime::checked_sub`] Cargo ----- - [You can now use alternative registries to crates.io.][cargo/6654] Misc ---- - [You can now use the `?` operator in your documentation tests without manually adding `fn main() -> Result<(), _> {}`.][56470] Compatibility Notes ------------------- - [`Command::before_exec` is now deprecated in favor of the unsafe method `Command::pre_exec`.][58059] - [Use of `ATOMIC_{BOOL, ISIZE, USIZE}_INIT` is now deprecated.][57425] As you can now use `const` functions in `static` variables. [58370]: rust-lang/rust#58370 [58406]: rust-lang/rust#58406 [58421]: rust-lang/rust#58421 [58166]: rust-lang/rust#58166 [58044]: rust-lang/rust#58044 [58057]: rust-lang/rust#58057 [58059]: rust-lang/rust#58059 [57809]: rust-lang/rust#57809 [57873]: rust-lang/rust#57873 [57604]: rust-lang/rust#57604 [57367]: rust-lang/rust#57367 [57407]: rust-lang/rust#57407 [57425]: rust-lang/rust#57425 [57106]: rust-lang/rust#57106 [56470]: rust-lang/rust#56470 [cargo/6654]: rust-lang/cargo#6654 [`Any::type_id`]: https://doc.rust-lang.org/std/any/trait.Any.html#tymethod.type_id [`Error::type_id`]: https://doc.rust-lang.org/std/error/trait.Error.html#tymethod.type_id [`atomic::AtomicI16`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI16.html [`atomic::AtomicI32`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI32.html [`atomic::AtomicI64`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI64.html [`atomic::AtomicI8`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI8.html [`atomic::AtomicU16`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU16.html [`atomic::AtomicU32`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU32.html [`atomic::AtomicU64`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU64.html [`atomic::AtomicU8`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU8.html [`convert::Infallible`]: https://doc.rust-lang.org/std/convert/enum.Infallible.html [`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html [`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html [`iter::from_fn`]: https://doc.rust-lang.org/std/iter/fn.from_fn.html [`iter::successors`]: https://doc.rust-lang.org/std/iter/fn.successors.html [`num::NonZeroI128`]: https://doc.rust-lang.org/std/num/struct.NonZeroI128.html [`num::NonZeroI16`]: https://doc.rust-lang.org/std/num/struct.NonZeroI16.html [`num::NonZeroI32`]: https://doc.rust-lang.org/std/num/struct.NonZeroI32.html [`num::NonZeroI64`]: https://doc.rust-lang.org/std/num/struct.NonZeroI64.html [`num::NonZeroI8`]: https://doc.rust-lang.org/std/num/struct.NonZeroI8.html [`num::NonZeroIsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroIsize.html [`slice::sort_by_cached_key`]: https://doc.rust-lang.org/std/slice/fn.sort_by_cached_key [`str::escape_debug`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_debug [`str::escape_default`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_default [`str::escape_unicode`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_unicode [`str::split_ascii_whitespace`]: https://doc.rust-lang.org/std/primitive.str.html#method.split_ascii_whitespace [`Instant::checked_add`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_add [`Instant::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_sub [`SystemTime::checked_add`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_add [`SystemTime::checked_sub`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_sub
Pkgsrc changes: * Bump required rust version to build to 1.33.0. * Adapt patches to changed file locations. * (I worry about 32-bit ports, now that Atomic64 apparently is First-Class; this has been built on NetBSD/amd64 so far) Upstream changes: Version 1.34.0 (2019-04-11) ========================== Language -------- - [You can now use `#[deprecated = "reason"]`][58166] as a shorthand for `#[deprecated(note = "reason")]`. This was previously allowed by mistake but had no effect. - [You can now accept token streams in `#[attr()]`,`#[attr[]]`, and `#[attr{}]` procedural macros.][57367] - [You can now write `extern crate self as foo;`][57407] to import your crate's root into the extern prelude. Compiler -------- - [You can now target `riscv64imac-unknown-none-elf` and `riscv64gc-unknown-none-elf`.][58406] - [You can now enable linker plugin LTO optimisations with `-C linker-plugin-lto`.][58057] This allows rustc to compile your Rust code into LLVM bitcode allowing LLVM to perform LTO optimisations across C/C++ FFI boundaries. - [You can now target `powerpc64-unknown-freebsd`.][57809] Libraries --------- - [The trait bounds have been removed on some of `HashMap<K, V, S>`'s and `HashSet<T, S>`'s basic methods.][58370] Most notably you no longer require the `Hash` trait to create an iterator. - [The `Ord` trait bounds have been removed on some of `BinaryHeap<T>`'s basic methods.][58421] Most notably you no longer require the `Ord` trait to create an iterator. - [The methods `overflowing_neg` and `wrapping_neg` are now `const` functions for all numeric types.][58044] - [Indexing a `str` is now generic over all types that implement `SliceIndex<str>`.][57604] - [`str::trim`, `str::trim_matches`, `str::trim_{start, end}`, and `str::trim_{start, end}_matches` are now `#[must_use]`][57106] and will produce a warning if their returning type is unused. - [The methods `checked_pow`, `saturating_pow`, `wrapping_pow`, and `overflowing_pow` are now available for all numeric types.][57873] These are equivalvent to methods such as `wrapping_add` for the `pow` operation. Stabilized APIs --------------- #### std & core * [`Any::type_id`] * [`Error::type_id`] * [`atomic::AtomicI16`] * [`atomic::AtomicI32`] * [`atomic::AtomicI64`] * [`atomic::AtomicI8`] * [`atomic::AtomicU16`] * [`atomic::AtomicU32`] * [`atomic::AtomicU64`] * [`atomic::AtomicU8`] * [`convert::Infallible`] * [`convert::TryFrom`] * [`convert::TryInto`] * [`iter::from_fn`] * [`iter::successors`] * [`num::NonZeroI128`] * [`num::NonZeroI16`] * [`num::NonZeroI32`] * [`num::NonZeroI64`] * [`num::NonZeroI8`] * [`num::NonZeroIsize`] * [`slice::sort_by_cached_key`] * [`str::escape_debug`] * [`str::escape_default`] * [`str::escape_unicode`] * [`str::split_ascii_whitespace`] #### std * [`Instant::checked_add`] * [`Instant::checked_sub`] * [`SystemTime::checked_add`] * [`SystemTime::checked_sub`] Cargo ----- - [You can now use alternative registries to crates.io.][cargo/6654] Misc ---- - [You can now use the `?` operator in your documentation tests without manually adding `fn main() -> Result<(), _> {}`.][56470] Compatibility Notes ------------------- - [`Command::before_exec` is now deprecated in favor of the unsafe method `Command::pre_exec`.][58059] - [Use of `ATOMIC_{BOOL, ISIZE, USIZE}_INIT` is now deprecated.][57425] As you can now use `const` functions in `static` variables. [58370]: rust-lang/rust#58370 [58406]: rust-lang/rust#58406 [58421]: rust-lang/rust#58421 [58166]: rust-lang/rust#58166 [58044]: rust-lang/rust#58044 [58057]: rust-lang/rust#58057 [58059]: rust-lang/rust#58059 [57809]: rust-lang/rust#57809 [57873]: rust-lang/rust#57873 [57604]: rust-lang/rust#57604 [57367]: rust-lang/rust#57367 [57407]: rust-lang/rust#57407 [57425]: rust-lang/rust#57425 [57106]: rust-lang/rust#57106 [56470]: rust-lang/rust#56470 [cargo/6654]: rust-lang/cargo#6654 [`Any::type_id`]: https://doc.rust-lang.org/std/any/trait.Any.html#tymethod.type_id [`Error::type_id`]: https://doc.rust-lang.org/std/error/trait.Error.html#tymethod.type_id [`atomic::AtomicI16`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI16.html [`atomic::AtomicI32`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI32.html [`atomic::AtomicI64`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI64.html [`atomic::AtomicI8`]: https://doc.rust-lang.org/std/atomic/struct.AtomicI8.html [`atomic::AtomicU16`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU16.html [`atomic::AtomicU32`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU32.html [`atomic::AtomicU64`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU64.html [`atomic::AtomicU8`]: https://doc.rust-lang.org/std/atomic/struct.AtomicU8.html [`convert::Infallible`]: https://doc.rust-lang.org/std/convert/enum.Infallible.html [`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html [`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html [`iter::from_fn`]: https://doc.rust-lang.org/std/iter/fn.from_fn.html [`iter::successors`]: https://doc.rust-lang.org/std/iter/fn.successors.html [`num::NonZeroI128`]: https://doc.rust-lang.org/std/num/struct.NonZeroI128.html [`num::NonZeroI16`]: https://doc.rust-lang.org/std/num/struct.NonZeroI16.html [`num::NonZeroI32`]: https://doc.rust-lang.org/std/num/struct.NonZeroI32.html [`num::NonZeroI64`]: https://doc.rust-lang.org/std/num/struct.NonZeroI64.html [`num::NonZeroI8`]: https://doc.rust-lang.org/std/num/struct.NonZeroI8.html [`num::NonZeroIsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroIsize.html [`slice::sort_by_cached_key`]: https://doc.rust-lang.org/std/slice/fn.sort_by_cached_key [`str::escape_debug`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_debug [`str::escape_default`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_default [`str::escape_unicode`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_unicode [`str::split_ascii_whitespace`]: https://doc.rust-lang.org/std/primitive.str.html#method.split_ascii_whitespace [`Instant::checked_add`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_add [`Instant::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_sub [`SystemTime::checked_add`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_add [`SystemTime::checked_sub`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_sub
Fixes #56409