rustc_parse_format: improve diagnostics for unsupported debug = syntax #150897
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rustbot has assigned @JonathanBrouwer. Use |
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☔ The latest upstream changes (presumably #151003) made this pull request unmergeable. Please resolve the merge conflicts. |
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Some changes occurred in src/tools/cargo cc @ehuss |
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r? @estebank |
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estebank
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@estebank thanks for the review. I made the necessary changes. |
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Detect Python-style f-string debug syntax in format strings and emit a
clear diagnostic explaining that it is not supported in Rust. When the
intended operation can be inferred, suggest the corresponding Rust
alternative e.g from `println!("{=}", x)` to `dbg!({x})`.
Signed-off-by: Usman Akinyemi <usmanakinyemi202@gmail.com>
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed. Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers. |
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@bors r+ rollup |
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❌ Encountered an error while executing command |
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rustc_parse_format: improve diagnostics for unsupported debug = syntax
Detect Python-style f-string debug syntax in format strings and emit a
clear diagnostic explaining that it is not supported in Rust. When the
intended operation can be inferred, suggest the corresponding Rust
alternative (e.g. `dbg!` for `{x=}`).
This was referenced Feb 9, 2026
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…uwer Rollup of 7 pull requests Successful merges: - #151960 (rustc_parse: improve the error diagnostic for "missing let") - #152157 (Fix error spans for `asm!()` args that are macros) - #152317 (fix: sup_trace to sub_trace) - #150897 (rustc_parse_format: improve diagnostics for unsupported debug = syntax) - #151154 (Add `s390x-unknown-none-softfloat` with `RustcAbi::Softfloat`) - #152013 (Update to Xcode 26.2) - #152326 (Remove the compiler adhoc group)
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Rollup merge of #150897 - Unique-Usman:ua/debug, r=estebank rustc_parse_format: improve diagnostics for unsupported debug = syntax Detect Python-style f-string debug syntax in format strings and emit a clear diagnostic explaining that it is not supported in Rust. When the intended operation can be inferred, suggest the corresponding Rust alternative (e.g. `dbg!` for `{x=}`).
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Detect Python-style f-string debug syntax in format strings and emit a
clear diagnostic explaining that it is not supported in Rust. When the
intended operation can be inferred, suggest the corresponding Rust
alternative (e.g.
dbg!for{x=}).