Stabilize fn-like proc macros in expression, pattern and statement positions #68717

petrochenkov · 2020-01-31T22:33:33Z

I.e. all the positions in which stable macro_rules macros are supported.

Depends on #68716 ("Stabilize Span::mixed_site").

cc #54727
cc #54727 (comment)

Stabilization report: #68717 (comment).

rust-highfive · 2020-01-31T22:33:38Z

r? @varkor

(rust_highfive has picked a reviewer for you, use r? to override)

bors · 2020-02-11T05:14:03Z

☔ The latest upstream changes (presumably #68929) made this pull request unmergeable. Please resolve the merge conflicts.

petrochenkov · 2020-02-16T10:11:53Z

This is still waiting on me writing the stabilization report, but it's also blocked on #68716.

Centril · 2020-04-13T03:12:56Z

r? @Centril

Dylan-DPC-zz · 2020-04-15T18:06:59Z

r? @varkor

Stabilize `Span::mixed_site` Closes rust-lang#65049. cc rust-lang#54727 (comment) Pre-requisite for rust-lang#68717 ("Stabilize fn-like proc macros in expression, pattern and statement positions"). Stabilization report: rust-lang#68716 (comment).

varkor · 2020-05-18T13:34:13Z

@bors r+

bors · 2020-05-18T13:34:15Z

📌 Commit 5c6f7b3 has been approved by varkor

bors · 2020-05-18T14:24:42Z

⌛ Testing commit 5c6f7b3 with merge ef677e3f09cdcd38e6357c5c04898057b95165d1...

Aaron1011 · 2020-05-18T17:55:40Z

@bors retry

A job was stuck for 3 hours on 'Installing msys2 packages' (https://dev.azure.com/rust-lang/rust/_build/results?buildId=29511&view=logs&j=339a807e-05eb-50a3-f69a-0d7a3a5b2cef), so the build is going to time out.

mati865 · 2020-05-18T18:12:24Z

@Aaron1011 can you close the tree? It's msys2 issue.
I'm working on a workaround in #72332

bors · 2020-05-19T03:11:38Z

⌛ Testing commit 5c6f7b3 with merge 5943351...

bors · 2020-05-19T06:30:06Z

☀️ Test successful - checks-azure
Approved by: varkor
Pushing 5943351 to master...

Stabilize fn-like proc macros in expression, pattern and statement positions I.e. all the positions in which stable `macro_rules` macros are supported. Depends on rust-lang/rust#68716 ("Stabilize `Span::mixed_site`"). cc rust-lang/rust#54727 cc rust-lang/rust#54727 (comment) Stabilization report: rust-lang/rust#68717 (comment).

Fn-like procedural macros in expression positions were stabilized in <rust-lang/rust#68717>.

While here clean up all pkglint warnings. Changes since 1.44.1: Version 1.45.2 (2020-08-03) ========================== * [Fix bindings in tuple struct patterns][74954] * [Fix track_caller integration with trait objects][74784] [74954]: rust-lang/rust#74954 [74784]: rust-lang/rust#74784 Version 1.45.1 (2020-07-30) ========================== * [Fix const propagation with references.][73613] * [rustfmt accepts rustfmt_skip in cfg_attr again.][73078] * [Avoid spurious implicit region bound.][74509] * [Install clippy on x.py install][74457] [73613]: rust-lang/rust#73613 [73078]: rust-lang/rust#73078 [74509]: rust-lang/rust#74509 [74457]: rust-lang/rust#74457 Version 1.45.0 (2020-07-16) ========================== Language -------- - [Out of range float to int conversions using `as` has been defined as a saturating conversion.][71269] This was previously undefined behaviour, but you can use the `{f64, f32}::to_int_unchecked` methods to continue using the current behaviour, which may be desirable in rare performance sensitive situations. - [`mem::Discriminant<T>` now uses `T`'s discriminant type instead of always using `u64`.][70705] - [Function like procedural macros can now be used in expression, pattern, and statement positions.][68717] This means you can now use a function-like procedural macro anywhere you can use a declarative (`macro_rules!`) macro. Compiler -------- - [You can now override individual target features through the `target-feature` flag.][72094] E.g. `-C target-feature=+avx2 -C target-feature=+fma` is now equivalent to `-C target-feature=+avx2,+fma`. - [Added the `force-unwind-tables` flag.][69984] This option allows rustc to always generate unwind tables regardless of panic strategy. - [Added the `embed-bitcode` flag.][71716] This codegen flag allows rustc to include LLVM bitcode into generated `rlib`s (this is on by default). - [Added the `tiny` value to the `code-model` codegen flag.][72397] - [Added tier 3 support\* for the `mipsel-sony-psp` target.][72062] - [Added tier 3 support for the `thumbv7a-uwp-windows-msvc` target.][72133] \* Refer to Rust's [platform support page][forge-platform-support] for more information on Rust's tiered platform support. Libraries --------- - [`net::{SocketAddr, SocketAddrV4, SocketAddrV6}` now implements `PartialOrd` and `Ord`.][72239] - [`proc_macro::TokenStream` now implements `Default`.][72234] - [You can now use `char` with `ops::{Range, RangeFrom, RangeFull, RangeInclusive, RangeTo}` to iterate over a range of codepoints.][72413] E.g. you can now write the following; ```rust for ch in 'a'..='z' { print!("{}", ch); } println!(); // Prints "abcdefghijklmnopqrstuvwxyz" ``` - [`OsString` now implements `FromStr`.][71662] - [The `saturating_neg` method as been added to all signed integer primitive types, and the `saturating_abs` method has been added for all integer primitive types.][71886] - [`Arc<T>`, `Rc<T>` now implement `From<Cow<'_, T>>`, and `Box` now implements `From<Cow>` when `T` is `[T: Copy]`, `str`, `CStr`, `OsStr`, or `Path`.][71447] - [`Box<[T]>` now implements `From<[T; N]>`.][71095] - [`BitOr` and `BitOrAssign` are implemented for all `NonZero` integer types.][69813] - [The `fetch_min`, and `fetch_max` methods have been added to all atomic integer types.][72324] - [The `fetch_update` method has been added to all atomic integer types.][71843] Stabilized APIs --------------- - [`Arc::as_ptr`] - [`BTreeMap::remove_entry`] - [`Rc::as_ptr`] - [`rc::Weak::as_ptr`] - [`rc::Weak::from_raw`] - [`rc::Weak::into_raw`] - [`str::strip_prefix`] - [`str::strip_suffix`] - [`sync::Weak::as_ptr`] - [`sync::Weak::from_raw`] - [`sync::Weak::into_raw`] - [`char::UNICODE_VERSION`] - [`Span::resolved_at`] - [`Span::located_at`] - [`Span::mixed_site`] - [`unix::process::CommandExt::arg0`] Cargo ----- Misc ---- - [Rustdoc now supports strikethrough text in Markdown.][71928] E.g. `~~outdated information~~` becomes "~~outdated information~~". - [Added an emoji to Rustdoc's deprecated API message.][72014] Compatibility Notes ------------------- - [Trying to self initialize a static value (that is creating a value using itself) is unsound and now causes a compile error.][71140] - [`{f32, f64}::powi` now returns a slightly different value on Windows.][73420] This is due to changes in LLVM's intrinsics which `{f32, f64}::powi` uses. - [Rustdoc's CLI's extra error exit codes have been removed.][71900] These were previously undocumented and not intended for public use. Rustdoc still provides a non-zero exit code on errors. Internals Only -------------- - [Make clippy a git subtree instead of a git submodule][70655] - [Unify the undo log of all snapshot types][69464] [73420]: rust-lang/rust#73420 [72324]: rust-lang/rust#72324 [71843]: rust-lang/rust#71843 [71886]: rust-lang/rust#71886 [72234]: rust-lang/rust#72234 [72239]: rust-lang/rust#72239 [72397]: rust-lang/rust#72397 [72413]: rust-lang/rust#72413 [72014]: rust-lang/rust#72014 [72062]: rust-lang/rust#72062 [72094]: rust-lang/rust#72094 [72133]: rust-lang/rust#72133 [71900]: rust-lang/rust#71900 [71928]: rust-lang/rust#71928 [71662]: rust-lang/rust#71662 [71716]: rust-lang/rust#71716 [71447]: rust-lang/rust#71447 [71269]: rust-lang/rust#71269 [71095]: rust-lang/rust#71095 [71140]: rust-lang/rust#71140 [70655]: rust-lang/rust#70655 [70705]: rust-lang/rust#70705 [69984]: rust-lang/rust#69984 [69813]: rust-lang/rust#69813 [69464]: rust-lang/rust#69464 [68717]: rust-lang/rust#68717 [`Arc::as_ptr`]: https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.as_ptr [`BTreeMap::remove_entry`]: https://doc.rust-lang.org/stable/std/collections/struct.BTreeMap.html#method.remove_entry [`Rc::as_ptr`]: https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.as_ptr [`rc::Weak::as_ptr`]: https://doc.rust-lang.org/stable/std/rc/struct.Weak.html#method.as_ptr [`rc::Weak::from_raw`]: https://doc.rust-lang.org/stable/std/rc/struct.Weak.html#method.from_raw [`rc::Weak::into_raw`]: https://doc.rust-lang.org/stable/std/rc/struct.Weak.html#method.into_raw [`sync::Weak::as_ptr`]: https://doc.rust-lang.org/stable/std/sync/struct.Weak.html#method.as_ptr [`sync::Weak::from_raw`]: https://doc.rust-lang.org/stable/std/sync/struct.Weak.html#method.from_raw [`sync::Weak::into_raw`]: https://doc.rust-lang.org/stable/std/sync/struct.Weak.html#method.into_raw [`str::strip_prefix`]: https://doc.rust-lang.org/stable/std/primitive.str.html#method.strip_prefix [`str::strip_suffix`]: https://doc.rust-lang.org/stable/std/primitive.str.html#method.strip_suffix [`char::UNICODE_VERSION`]: https://doc.rust-lang.org/stable/std/char/constant.UNICODE_VERSION.html [`Span::resolved_at`]: https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.resolved_at [`Span::located_at`]: https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.located_at [`Span::mixed_site`]: https://doc.rust-lang.org/stable/proc_macro/struct.Span.html#method.mixed_site [`unix::process::CommandExt::arg0`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.arg0

rust-highfive assigned varkor Jan 31, 2020

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petrochenkov mentioned this pull request Jan 31, 2020

Stabilize Span::mixed_site #68716

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jonas-schievink added the relnotes Marks issues that should be documented in the release notes of the next release. label Jan 31, 2020

jonas-schievink added this to the 1.43 milestone Jan 31, 2020

jonas-schievink added the T-lang Relevant to the language team, which will review and decide on the PR/issue. label Jan 31, 2020

petrochenkov mentioned this pull request Jan 31, 2020

Tracking issue for procedural macros and "hygiene 2.0" #54727

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petrochenkov added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 1, 2020

pksunkara approved these changes Feb 1, 2020

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SergioBenitez mentioned this pull request Feb 16, 2020

Compile with stable Rust rwf2/Rocket#19

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pksunkara approved these changes Feb 19, 2020

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Centril modified the milestones: 1.43, 1.44 Mar 10, 2020

This was referenced Mar 14, 2020

Compile with stable Rust near/nearcore#2260

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Use on stable Rust? CensoredUsername/dynasm-rs#31

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rust-highfive assigned Centril and unassigned varkor Apr 13, 2020

rust-highfive assigned varkor and unassigned Centril Apr 15, 2020

Dylan-DPC-zz modified the milestones: 1.44, 1.45 Apr 21, 2020

rfcbot added finished-final-comment-period The final comment period is finished for this PR / Issue. and removed final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. labels May 17, 2020

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kevinmehall mentioned this pull request May 18, 2020

Add Span::mixed_site, Span::resolved_at, and Span::located_at behind hygiene feature dtolnay/proc-macro2#228

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bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 18, 2020

bors added the merged-by-bors This PR was explicitly merged by bors. label May 19, 2020

bors merged commit 5943351 into rust-lang:master May 19, 2020

ehuss mentioned this pull request May 20, 2020

Update fn-like proc-macro invocation restrictions. rust-lang/reference#816

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Emoun mentioned this pull request May 28, 2020

Implicit module name duplication Emoun/duplicate#7

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yvt added a commit to yvt/Stella2 that referenced this pull request May 30, 2020

refactor: stop using proc-macro-hack

14f3588

Fn-like procedural macros in expression positions were stabilized in <rust-lang/rust#68717>.

scrabsha mentioned this pull request Jun 12, 2020

[RFC] Minimal Supported Rust Version gleam-lang/gleam#659

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nitsky mentioned this pull request Jul 8, 2020

IDE support in fn-like proc macro arguments rust-lang/rust-analyzer#5265

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coriolinus mentioned this pull request Jul 10, 2020

futures_util::select! runs into recursion limits rust-lang/futures-rs#1917

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alecmocatta mentioned this pull request Jul 11, 2020

Remove proc macro hack alecmocatta/serde_closure#27

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camelid mentioned this pull request Jul 28, 2020

Section on proc macros is out of date rust-lang/reference#856

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HadrienG2 mentioned this pull request Jan 31, 2021

Is proc_macro_hygiene still needed? jkarns275/f128#30

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petrochenkov deleted the stabexpat branch February 22, 2025 18:44

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Stabilize fn-like proc macros in expression, pattern and statement positions #68717

Stabilize fn-like proc macros in expression, pattern and statement positions #68717

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Stabilize fn-like proc macros in expression, pattern and statement positions #68717

Stabilize fn-like proc macros in expression, pattern and statement positions #68717

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