1f5bc176b0
Improve and fix diagnostics of exhaustiveness checking Primarily, this fixes https://github.com/rust-lang/rust/issues/56379. This also fixes incorrect interactions between or-patterns and slice patterns that I discovered while working on #56379. Those two examples show the incorrect diagnostics: ```rust match &[][..] { [true] => {} [true // detected as unreachable but that's not true | false, ..] => {} _ => {} } match (true, None) { (true, Some(_)) => {} (false, Some(true)) => {} (true | false, None | Some(true // should be detected as unreachable | false)) => {} } ``` I did not measure any perf impact. However, I suspect that [`616ba9f`](https://github.com/rust-lang/rust/pull/80104/commits/616ba9f9f7f5845777a36e1a41a515e6c33a8776) should have a negative impact on large or-patterns. I'll see what the perf run says; I have optimization ideas up my sleeve if needed. EDIT: I initially had a noticeable perf impact that I thought unavoidable. I then proceeded to avoid it x) r? `@varkor` `@rustbot` label +A-exhaustiveness-checking |
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| bootstrap | ||
| build_helper | ||
| ci | ||
| doc | ||
| etc | ||
| librustdoc | ||
| llvm-project@8d78ad1389 | ||
| test | ||
| tools | ||
| README.md | ||
| stage0.txt | ||
| version | ||
This directory contains the source code of the rust project, including:
- The test suite
- The bootstrapping build system
- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.