Literal error reporting cleanup
While doing some performance work, I noticed some code duplication in `librustc_parser/lexer/mod.rs`, so I cleaned it up.
This PR is probably best reviewed commit by commit.
I'm not sure what the API stability practices for `librustc_lexer` are. Four public methods in `unescape.rs` can be removed, but two are used by clippy, so I left them in for now.
I could open a PR for Rust-Analyzer when this one lands.
But how do I open a PR for clippy? (Git submodules are frustrating to work with)
rustc_driver: factor out computing the exit code
In a recent Miri PR I [added a convenience wrapper](https://github.com/rust-lang/miri/pull/1405/files#diff-c3d602c5c8035a16699ce9c015bfeceaR125) around `catch_fatal_errors` and `run_compiler` that @oli-obk suggested I could upstream. However, after seeing what could be shared between `rustc_driver::main`, clippy and Miri, really the only thing I found is computing the exit code -- so that's what this PR does.
What prevents using the Miri convenience function in `rustc_driver::main` and clippy is that they do extra work inside `catch_fatal_errors`, and while I could abstract that away, clippy actually *computes the callbacks* inside there, and I fond no good way to abstract that and thus gave up. Maybe the clippy thing could be moved out, I am not sure if it ever can actually raise a `FatalErrorMarker` -- someone more knowledgeable in clippy would have to do that.
Fixed incorrect suggestion of `clone_double_ref` lint
- Added `<_>` to suggestion
- Changed help message
- Added new tests
Closes#5494
changelog: Improve suggestion of [`clone_double_ref`]
New lint `match_vec_item`
Added new lint to warn a match on index item which can panic. It's always better to use `get(..)` instead.
Closes#5500
changelog: New lint `match_on_vec_items`
Implement mismatched_target_os lint
I've extended the check suggested in the issue to all the currently supported operating systems instead of limiting it to `linux` and `macos`, let me know if we want to do this.
Also, I've restored the text `There are over XXX lints ...` in the README as it was matched against by `cargo dev new_lint`.
changelog: Added `mismatched_target_os` lint to warn when an operating system is used in target family position in a #[cfg] attribute
Closes#3949
- Show just one error message with multiple suggestions in case of
using multiple times an OS in target family position
- Only suggest #[cfg(unix)] when the OS is in the Unix family
- Test all the operating systems
Don't trigger while_let_on_iterator when the iterator is recreated every iteration
r? @phansch
Fixes#1654
changelog: Fix false positive in [`while_let_on_iterator`]
Rollup of 5 pull requests
Successful merges:
- #5408 (Downgrade match_bool to pedantic)
- #5505 (Avoid running cargo+internal lints when not enabled)
- #5516 (Add a note to the beta sections of release.md)
- #5517 (Deploy time travel)
- #5523 (Add lifetime test case for `new_ret_no_self`)
Failed merges:
r? @ghost
changelog: rollup
Deploy time travel
Since not only commits to the master branch, but also tags and the beta branch are deployed, we have to be cautious which version of the deploy script is used. GHA always runs the workflow that is commited on the `ref`, that gets tested. For tagged commits. this is 6 weeks outdated workflows/scripts. To prevent this, this workflow first checks out the deploy.sh script, the website templates and all python scripts generating files for the website.
changelog: none
