When moving the script out of CI configuration and into a proper script
we lost track of the current directory changing (and as such the
parameters of the script needing to be different now).
Enable incremental rustfmt adoption
Enables an incremental rollout of rustfmt usage within the compiler via a granular ignore configuration and automated enforcement. The decision to format the repository was approved in https://github.com/rust-lang/compiler-team/issues/80#issuecomment-491324079.
This PR includes:
* an `[ignore]` section to `rustfmt.toml` including most of the repository
* `./x.py` downloads rustfmt from a specific nightly (we do not pin to beta or stable as we need unstable features)
* an `./x.py fmt [--check]` command which runs cargo-fmt
* `./x.py fmt --check` runs during the same test step as `src/tools/tidy`, on master, but not on beta or stable as we don't want to depend on nightly rustfmt there.
* a commit to format `src/librustc_fs_util` as an initial target and to ensure enforcement is working from the start
Allocate HIR on an arena 1/4
This PR is the first in a series of 4, aiming at allocating the HIR on an arena, as a memory optimisation.
1. This first PR lays the groundwork and migrates some low-hanging fruits.
2. The second PR will migrate `hir::Expr`, `hir::Pat` and related.
3. The third PR will migrate `hir::Ty` and related.
4. The final PR will be dedicated to eventual cleanups.
In order to make the transition as gradual as possible, some lowering routines receive `Box`-allocated data and move it into the arena. This is a bit wasteful, but hopefully temporary.
Nonetheless, special care should be taken to avoid double arena allocations.
Work mentored by @Zoxc.
Require issue = "none" over issue = "0" in unstable attributes
These changes make the use of `issue = "none"` required in unstable attributes throughout the compiler.
Notes:
- #66299 is now in beta so `issue = "none"` is accepted.
- The `tidy` tool now fails on `issue = "0"`.
- Tests that used `issue = "0"` were changed to use `issue = "none"`, except for _one_ that asserts `issue = "0"` can still be used.
- The compiler still allows `issue = "0"` because some submodules require it, this could be disallowed once these are updated.
Resolves#41260
r? @varkor
Cleanup `lower_pattern_unadjusted` & Improve slice pat typeck
Following up on https://github.com/rust-lang/rust/pull/67318, in this PR, the HAIR lowering of patterns (`lower_pattern_unadjusted`) is cleaned up with a focus on slice patterns (in particular, some dead code is removed). Moreover, `check_pat_slice` is refactored some more.
r? @matthewjasper
Refactor type & bounds parsing thoroughly
PR is based on https://github.com/rust-lang/rust/pull/67131 with first one from this PR being ` extract parse_ty_tuple_or_parens`.
Also fixes#67146.
r? @estebank
This replaces cargo-fmt with rustfmt with --skip-children which should
allow us to format code without running into rust-lang/rustfmt#3930.
This also bumps up the version of rustfmt used to a more recent one.
Revamp `// run-fail` wrt. `--pass` & support `// build-fail` & `// check-fail`
Revamp how `// run-fail` tests work internally by having a separate `FailMode` that does not interfere with `PassMode`. In particular, `--pass check` will now have no effect on `// *-fail` tests. Moreover, new test annotations `// check-fail` (the default) and `// build-fail` are added. The latter is useful to distinguish post-monomorphization failures from pre-monomorphization failures as seen throughout the PR. Finally, ensure that non-`Ui` tests do not listen to `--pass check` such that the flag can be used with e.g. `./x.py test --pass check` directly.
Fixes#66929.
Fixes#67128.
r? @petrochenkov
cc @RalfJung @ninjasource
