Shorten Span of unused macro lints #90761

hellow554 · 2021-11-10T11:36:33Z

The span has been reduced to the actual ident of the macro, instead of linting the
whole macro.

compiler/rustc_resolve/src/macros.rs

hellow554 · 2021-11-10T11:40:44Z

src/test/ui/proc-macro/issue-39889.rs

-#![allow(dead_code)]
+#![allow(dead_code, unused_macros)]


This one is very insteresting.

rust/src/test/ui/proc-macro/auxiliary/issue-39889.rs

Lines 10 to 17 in 493ea77

pub fn f(_input: TokenStream) -> TokenStream {

let rules = r#"

macro_rules! id {

($($tt:tt)*) => { $($tt)* };

}

"#;

rules.parse().unwrap()

}

Any idea why the unused macro wasn't linted before?

Good question, no idea. My best guess is that now we have a span for id, but we didn't for the whole macro. I think changing the test is reasonable. The issue is about the macro expansion machinery, so it's reasonable to allow it.

est31 · 2021-11-10T14:36:10Z

Interestingly, back when unused macro warnings were added, both lints matched. Then, the unused function lint's span was reduced further and further:

I think the reduced span makes sense. I wonder if other unused lints have similar behaviour.

estebank · 2021-11-10T23:52:24Z

src/test/ui/proc-macro/issue-39889.rs

-#![allow(dead_code)]
+#![allow(dead_code, unused_macros)]


Good question, no idea. My best guess is that now we have a span for id, but we didn't for the whole macro. I think changing the test is reasonable. The issue is about the macro expansion machinery, so it's reasonable to allow it.

compiler/rustc_resolve/src/macros.rs

estebank · 2021-11-10T23:53:55Z

I have one stylistic nitpick, I'm r+ing, but if you want to fix it gets picked up, go ahead.

@bors r+

bors · 2021-11-10T23:53:56Z

📌 Commit 3f9b7d2113e50e062a7464ad861d933290e5fda0 has been approved by estebank

The span has been recuded to the actual ident, instead of linting the *whole* macro.

sanxiyn · 2021-11-11T11:41:28Z

@bors r=estebank

bors · 2021-11-11T11:41:30Z

📌 Commit 9f6ca74 has been approved by estebank

Shorten Span of unused macro lints The span has been reduced to the actual ident of the macro, instead of linting the *whole* macro. Closes rust-lang#90745 r? `@estebank`

bors · 2021-11-12T04:15:02Z

⌛ Testing commit 9f6ca74 with merge 5926b64a90e7d28dacce5b89ec935eb73656db23...

bors · 2021-11-12T04:19:56Z

💔 Test failed - checks-actions

rust-log-analyzer · 2021-11-12T04:30:23Z

The job dist-arm-linux failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

   Compiling cmake v0.1.44
error: could not compile `crossbeam-utils`

Caused by:
  process didn't exit successfully: `/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/rustc --crate-name build_script_build --edition=2018 /cargo/registry/src/github.com-1ecc6299db9ec823/crossbeam-utils-0.8.3/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=0 --cfg 'feature="default"' --cfg 'feature="lazy_static"' --cfg 'feature="std"' -C metadata=7d86092267134ed5 -C extra-filename=-7d86092267134ed5 --out-dir /checkout/obj/build/bootstrap/debug/build/crossbeam-utils-7d86092267134ed5 -L dependency=/checkout/obj/build/bootstrap/debug/deps --extern autocfg=/checkout/obj/build/bootstrap/debug/deps/libautocfg-fa5fb2f81f71684d.rlib --cap-lints allow -Wrust_2018_idioms -Wunused_lifetimes -Wsemicolon_in_expressions_from_macros -Dwarnings` (signal: 6, SIGABRT: process abort signal)
error: build failed
failed to run: /checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo build --manifest-path /checkout/src/bootstrap/Cargo.toml --locked
Build completed unsuccessfully in 0:00:56
make: *** [prepare] Error 1
---
[RUSTC-TIMING] build_script_build test:false 0.381
[RUSTC-TIMING] build_script_build test:false 0.672
   Compiling rustc-std-workspace-core v1.99.0 (/checkout/library/rustc-std-workspace-core)
[RUSTC-TIMING] rustc_std_workspace_core test:false 0.185
rustc exited with signal: 11 (core dumped)

Caused by:
Caused by:
  process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc --crate-name rustc_std_workspace_core --edition=2018 library/rustc-std-workspace-core/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 -C debuginfo=1 -C metadata=fd44d8b17c2359b1 -C extra-filename=-fd44d8b17c2359b1 --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/release/deps --extern core=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-std/x86_64-unknown-linux-gnu/release/deps/libcore-2a8f88aa3a5cb424.rmeta --cfg=bootstrap -Zsymbol-mangling-version=legacy -Zmacro-backtrace '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Cprefer-dynamic '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo` (exit status: 254)
[RUSTC-TIMING] libc test:false 0.682
[RUSTC-TIMING] compiler_builtins test:false 0.709
[RUSTC-TIMING] core test:false 16.299
error: build failed

hellow554 · 2021-11-12T05:59:00Z

That looks spurious, nothing I can do?!

est31 · 2021-11-12T06:23:46Z

@bors retry

bors · 2021-11-12T07:27:01Z

⌛ Testing commit 9f6ca74 with merge 6cc0c20eda28e8c057542cb97e0043e066fcef74...

bors · 2021-11-12T07:33:24Z

💔 Test failed - checks-actions

rust-log-analyzer · 2021-11-12T07:34:41Z

The job dist-mipsel-linux failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

   Compiling itoa v0.4.6
[RUSTC-TIMING] rustc_fs_util test:false 0.142
   Compiling snap v1.0.1
[RUSTC-TIMING] build_script_build test:false 0.223
rustc exited with signal: 11 (core dumped)
error: could not compile `serde_derive`
Caused by:
Caused by:
  process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc --crate-name build_script_build /cargo/registry/src/github.com-1ecc6299db9ec823/serde_derive-1.0.125/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=0 -C debug-assertions=off --cfg 'feature="default"' -C metadata=ac27467a3c2a9e00 -C extra-filename=-ac27467a3c2a9e00 --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage0-rustc/release/build/serde_derive-ac27467a3c2a9e00 -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-rustc/release/deps --cap-lints allow -Z binary-dep-depinfo` (exit status: 254)
[RUSTC-TIMING] itoa test:false 0.142
[RUSTC-TIMING] tinyvec test:false 0.314
[RUSTC-TIMING] datafrog test:false 0.356
[RUSTC-TIMING] rustc_graphviz test:false 0.562

est31 · 2021-11-12T07:40:16Z

@bors retry

Shorten Span of unused macro lints The span has been reduced to the actual ident of the macro, instead of linting the *whole* macro. Closes rust-lang#90745 r? `@estebank`

…askrgr Rollup of 7 pull requests Successful merges: - rust-lang#90589 (rustc_llvm: update PassWrapper for recent LLVM) - rust-lang#90644 (Extend the const swap feature) - rust-lang#90704 (Unix ExitStatus comments and a tiny docs fix) - rust-lang#90761 (Shorten Span of unused macro lints) - rust-lang#90795 (Add more comments to explain the code to generate the search index) - rust-lang#90798 (Document `unreachable!` custom panic message) - rust-lang#90826 (rustc_feature: Convert `BuiltinAttribute` from tuple to a struct) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup

…span, r=cjgillot Reduce span of let else irrefutable_let_patterns warning Huge spans aren't good for IDE users as they underline constructs that are possibly multiline. Similar PR to rust-lang#90761 which did the same for the `unused_macros` lint.

Shrink `missing_{safety,errors,panics}_doc` spans Shrink the spans of `clippy::missing_*_doc` to match `missing_docs` and don't cover the entire item anymore. This helps readability in IDEs by not coloring the entire screen yellow, similar to rust-lang/rust#103749 and rust-lang/rust#90761. before: ![image](https://user-images.githubusercontent.com/26522220/199483288-af0cf0c2-a9e4-47a8-81e3-50ccf380d939.png) after: ![image](https://user-images.githubusercontent.com/26522220/199483366-445e5ddd-9f71-4de1-85be-43461c9b7d5d.png) changelog: [`missing_safety_doc`], [`missing_error_doc`], [`missing_panics_doc`]: These lints no longer span the entire item.

rust-highfive assigned estebank Nov 10, 2021

rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Nov 10, 2021

hellow554 force-pushed the macro_span branch from 69bfa8e to 3f9b7d2 Compare November 10, 2021 11:37

hellow554 commented Nov 10, 2021

View reviewed changes

compiler/rustc_resolve/src/macros.rs Outdated Show resolved Hide resolved

hellow554 commented Nov 10, 2021

View reviewed changes

estebank approved these changes Nov 10, 2021

View reviewed changes

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 Nov 10, 2021

This comment has been minimized.

Sign in to view

hellow554 force-pushed the macro_span branch 2 times, most recently from 8ea10b7 to 9f6ca74 Compare November 11, 2021 07:03

Shorten Span of unused macro lints

9f6ca74

The span has been recuded to the actual ident, instead of linting the *whole* macro.

apiraino added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Nov 11, 2021

matthiaskrgr mentioned this pull request Nov 11, 2021

Rollup of 4 pull requests #90802

Closed

bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Nov 12, 2021

bors removed the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Nov 12, 2021

bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Nov 12, 2021

bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Nov 12, 2021

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 Nov 12, 2021

hellow554 mentioned this pull request Nov 12, 2021

Rollup of 4 pull requests #90823

Closed

matthiaskrgr mentioned this pull request Nov 12, 2021

Rollup of 7 pull requests #90836

Merged

bors merged commit 640f365 into rust-lang:master Nov 12, 2021

rustbot added this to the 1.58.0 milestone Nov 12, 2021

hellow554 deleted the macro_span branch November 14, 2021 08:19

est31 mentioned this pull request Apr 17, 2022

Implement a lint to warn about unused macro rules #96150

Merged

est31 mentioned this pull request Oct 30, 2022

Reduce span of let else irrefutable_let_patterns warning #103749

Merged

lukas-code mentioned this pull request Nov 2, 2022

Shrink missing_{safety,errors,panics}_doc spans rust-lang/rust-clippy#9772

Merged

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Shorten Span of unused macro lints #90761

Shorten Span of unused macro lints #90761

hellow554 commented Nov 10, 2021 •

edited by estebank

Loading

hellow554 Nov 10, 2021 •

edited

Loading

estebank Nov 10, 2021

est31 commented Nov 10, 2021

estebank Nov 10, 2021

estebank commented Nov 10, 2021

bors commented Nov 10, 2021

This comment has been minimized.

sanxiyn commented Nov 11, 2021

bors commented Nov 11, 2021

bors commented Nov 12, 2021

bors commented Nov 12, 2021

rust-log-analyzer commented Nov 12, 2021

hellow554 commented Nov 12, 2021

est31 commented Nov 12, 2021

bors commented Nov 12, 2021

bors commented Nov 12, 2021

rust-log-analyzer commented Nov 12, 2021

est31 commented Nov 12, 2021

	pub fn f(_input: TokenStream) -> TokenStream {
	let rules = r#"
	macro_rules! id {
	($($tt:tt)) => { $($tt) };
	}
	"#;
	rules.parse().unwrap()
	}

		#![allow(dead_code)]
		#![allow(dead_code, unused_macros)]

		#![allow(dead_code)]
		#![allow(dead_code, unused_macros)]

Shorten Span of unused macro lints #90761

Shorten Span of unused macro lints #90761

Conversation

hellow554 commented Nov 10, 2021 • edited by estebank Loading

hellow554 Nov 10, 2021 • edited Loading

Choose a reason for hiding this comment

estebank Nov 10, 2021

Choose a reason for hiding this comment

est31 commented Nov 10, 2021

estebank Nov 10, 2021

Choose a reason for hiding this comment

estebank commented Nov 10, 2021

bors commented Nov 10, 2021

This comment has been minimized.

sanxiyn commented Nov 11, 2021

bors commented Nov 11, 2021

bors commented Nov 12, 2021

bors commented Nov 12, 2021

rust-log-analyzer commented Nov 12, 2021

hellow554 commented Nov 12, 2021

est31 commented Nov 12, 2021

bors commented Nov 12, 2021

bors commented Nov 12, 2021

rust-log-analyzer commented Nov 12, 2021

est31 commented Nov 12, 2021

hellow554 commented Nov 10, 2021 •

edited by estebank

Loading

hellow554 Nov 10, 2021 •

edited

Loading