Don't use empty trait names #139568
Merged
Don't use empty trait names #139568
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Currently the code continues, using an empty path, but it doesn't need to.
`resolve_ident_in_lexical_scope` checks for an empty name. Why is this necessary? Because `parse_item_impl` can produce an `impl` block with an empty trait name in some cases. This is pretty gross and very non-obvious. This commit avoids the use of the empty trait name. In one case the trait name is instead pulled from `TyKind::ImplTrait`, which prevents the output for `tests/ui/impl-trait/extra-impl-in-trait-impl.rs` from changing. In the other case we just fail the parse and don't try to recover. I think losing error recovery in this obscure case is worth the code cleanup. This change affects `tests/ui/parser/impl-parsing.rs`, which is split in two, and the obsolete `..` syntax cases are removed (they are tested elsewhere).
rustbot
added
S-waiting-on-review
compiler-errors
approved these changes
Apr 9, 2025
|
r? compiler-errors @bors r+ rollup |
bors
added
S-waiting-on-bors
Zalathar
added a commit
to Zalathar/rust
that referenced
this pull request
Apr 10, 2025
…mpiler-errors Don't use empty trait names Helps with rust-lang#137978. Details in individual commits. r? `@davidtwco`
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Apr 10, 2025
Rollup of 18 pull requests Successful merges: - rust-lang#137412 (Ensure `swap_nonoverlapping` is really always untyped) - rust-lang#138167 (Small code improvement in rustdoc hidden stripper) - rust-lang#138605 (Clean up librustdoc::html::render to be better encapsulated) - rust-lang#138682 (Allow drivers to supply a list of extra symbols to intern) - rust-lang#138904 (Test linking and running `no_std` binaries) - rust-lang#139423 (Suppress missing field error when autoderef bottoms out in infer) - rust-lang#139449 (match ergonomics: replace `peel_off_references` with a recursive call) - rust-lang#139507 (compiletest: Trim whitespace from environment variable names) - rust-lang#139530 (Remove some dead or leftover code related to rustc-intrinsic abi removal) - rust-lang#139560 (fix title of offset_of_enum feature) - rust-lang#139563 (emit a better error message for using the macro incorrectly) - rust-lang#139568 (Don't use empty trait names) - rust-lang#139580 (Temporarily leave the review rotation) - rust-lang#139589 (saethlin is back from vacation) - rust-lang#139592 (rustdoc: Enable Markdown extensions when looking for doctests) - rust-lang#139599 (Tracking issue template: fine-grained information on style update status) - rust-lang#139600 (Update `compiler-builtins` to 0.1.153) - rust-lang#139606 (Update compiletest to Edition 2024) r? `@ghost` `@rustbot` modify labels: rollup
Zalathar
added a commit
to Zalathar/rust
that referenced
this pull request
Apr 10, 2025
…mpiler-errors Don't use empty trait names Helps with rust-lang#137978. Details in individual commits. r? ``@davidtwco``
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Apr 10, 2025
Rollup of 17 pull requests Successful merges: - rust-lang#137412 (Ensure `swap_nonoverlapping` is really always untyped) - rust-lang#138167 (Small code improvement in rustdoc hidden stripper) - rust-lang#138605 (Clean up librustdoc::html::render to be better encapsulated) - rust-lang#138682 (Allow drivers to supply a list of extra symbols to intern) - rust-lang#138904 (Test linking and running `no_std` binaries) - rust-lang#139423 (Suppress missing field error when autoderef bottoms out in infer) - rust-lang#139449 (match ergonomics: replace `peel_off_references` with a recursive call) - rust-lang#139507 (compiletest: Trim whitespace from environment variable names) - rust-lang#139530 (Remove some dead or leftover code related to rustc-intrinsic abi removal) - rust-lang#139560 (fix title of offset_of_enum feature) - rust-lang#139563 (emit a better error message for using the macro incorrectly) - rust-lang#139568 (Don't use empty trait names) - rust-lang#139580 (Temporarily leave the review rotation) - rust-lang#139589 (saethlin is back from vacation) - rust-lang#139592 (rustdoc: Enable Markdown extensions when looking for doctests) - rust-lang#139599 (Tracking issue template: fine-grained information on style update status) - rust-lang#139600 (Update `compiler-builtins` to 0.1.153) r? `@ghost` `@rustbot` modify labels: rollup
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Apr 10, 2025
…iaskrgr Rollup of 13 pull requests Successful merges: - rust-lang#138167 (Small code improvement in rustdoc hidden stripper) - rust-lang#138605 (Clean up librustdoc::html::render to be better encapsulated) - rust-lang#139423 (Suppress missing field error when autoderef bottoms out in infer) - rust-lang#139449 (match ergonomics: replace `peel_off_references` with a recursive call) - rust-lang#139507 (compiletest: Trim whitespace from environment variable names) - rust-lang#139530 (Remove some dead or leftover code related to rustc-intrinsic abi removal) - rust-lang#139560 (fix title of offset_of_enum feature) - rust-lang#139563 (emit a better error message for using the macro incorrectly) - rust-lang#139568 (Don't use empty trait names) - rust-lang#139580 (Temporarily leave the review rotation) - rust-lang#139589 (saethlin is back from vacation) - rust-lang#139592 (rustdoc: Enable Markdown extensions when looking for doctests) - rust-lang#139599 (Tracking issue template: fine-grained information on style update status) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Apr 10, 2025
Rollup merge of rust-lang#139568 - nnethercote:empty-trait-name, r=compiler-errors Don't use empty trait names Helps with rust-lang#137978. Details in individual commits. r? ```@davidtwco```
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Helps with #137978. Details in individual commits.
r? @davidtwco