Implement CompilerDesugaringKind enum
This is the first step outlined in #35946. I think that the variants of `CompilerDesugaringKind` should be changed, I didn't know what the official names for `...` and `<-` are.
I'm not to sure how tests for the compiler work, but I would imagine that tests should be added such that
`Symbol::intern(s) == CompilerDesugaringKind::from(s).as_symbol()` for valid `s`.
Fix ES5 regression with shorthand names.
Reverts 1b6c9605e4.
I appreciate new features and syntax in Rust, but seriously, don't rewrite anything. Especially if this **breaks** documentation of language itself and every crate hosted at docs.rs.
Implement a temp redirect for cargo docs
As discussed in
https://github.com/rust-lang/cargo/issues/4040#issuecomment-321639074
This is a redirect meant to be replaced once cargo docs have been
converted to mdbook. We just want *a* URL to ride the trains for now so
that we can print doc.rust-lang.org/cargo in the paper book and
guarantee that it will go *somewhere* useful by the time the book is
printed.
Implemented as a meta redirect in HTML because we don't currently have
any google juice at doc.rust-lang.org/cargo to lose.
When I run `./x.py doc`, this creates a `build/x86_64-apple-darwin/doc/cargo/index.html` file that contains a meta redirect to doc.crates.io. As I understand rust-central-station to work, this should be what we need to make `doc.rust-lang.org/cargo` to work.
r? @alexcrichton and/or @steveklabnik
Document that `std:#️⃣:Hasher::finish()` does not reset the hasher.
Clarifies the fact that `finish()` doesn’t in fact end or reset the hasher. This was surprising to me …
Follows up on and fixes#43763
Remove useless help part
Part of #32658.
I think this error should be splitted into two parts, each more specific (`anonymous function` vs `type method`).
As discussed in
https://github.com/rust-lang/cargo/issues/4040#issuecomment-321639074
This is a redirect meant to be replaced once cargo docs have been
converted to mdbook. We just want *a* URL to ride the trains for now so
that we can print doc.rust-lang.org/cargo in the paper book and
guarantee that it will go *somewhere* useful by the time the book is
printed.
Implemented as a meta redirect in HTML because we don't currently have
any google juice at doc.rust-lang.org/cargo to lose.
Stop testing `i586-pc-windows-msvc` on AppVeyor.
Fixes#43881. Reduces AppVeyor test time back to ~2 hours on average.
The i586 libstd was never tested before Aug 13th, so this PR brings the situation back to the previous status-quo.
MIR borrow check (under debug flag)
Here is the current state of MIR borrow check.
It consists of (1.) some refactoring, (2.) a dataflow analysis to identify the borrows themselves, and (3.) a mir "transform" that does the borrow check itself based on the aforementioned dataflow results.
(There's also a drive-by fix to dataflow that I can factor into a separate PR if necessary. Interestingly I could not find a way to observe the bug outside of MIR borrowck.)
To be clear, this branch is not ready to be used as the default borrow check. Thus the code is guarded: To get mir-borrowck to run, you need to either supply an attribute `#[rustc_mir_borrowck]` or a debug flag `-Z borrowck-mir`.
Here are the main issues with the current MIR borrowck as it stands in this PR:
* No Notes emitted yet, just errors. (So the feedback is definitely inferior compared to AST borrowck today)
* Lvalue rendering differs between Ast and Mir. (Mostly minor, but replacement of field names with indices is very bad; big priority for me to fix ASAP.)
* Lots of ICEs (presumably because some MIR operations used here have well-formedness assumptions that are violated in borrowck-broken code)
* Conflates lots of cases that are distinguished by AST-borrowck
* Conflates "uninitialized" with "moved" (special case of previous bullet, one that I think should be fixed ASAP)
(I am hoping to fix as many of the above issues as I can in the near term, but I also would like to land this even if they are *not* all fixed, because the rebasing effort is getting to be a real drag.)
Added two fixmes: The `SimplifyBranches` pass cannot stay where it is,
and `BorrowckMir` should be a query, not a pass. But I am going to
leave those changes to a future PR.
One can either use `-Z borrowck-mir` or add the `#[rustc_mir_borrowck]` attribute
to opt into MIR based borrow checking.
Note that regardless of whether one opts in or not, AST-based borrow
check will still run as well. The errors emitted from AST-based
borrow check will include a "(Ast)" suffix in their error message,
while the errors emitted from MIR-based borrow check will include a
"(Mir)" suffix.
post-rebase: removed check for intra-statement mutual conflict;
replaced with assertion checking that at most one borrow is generated
per statement.
post-rebase: removed dead code: `IdxSet::pairs` and supporting stuff.
post-rebase: Do not put "(Ast)" suffix in error msg unless passed `-Z borrowck-mir`.
(But unconditionally include "(Mir)" suffix for mir-borrowck errors.)
rustc: Fix `unknown_lints` next to an unknown lint
The lint refactoring in #43522 didn't account for `#[allow(unknown_lints)]`
happening at the same node as an unknown lint itself, so this commit updates the
handling to ensure that the local set of lint configuration being built is
queried before looking at the chain of lint levels.
Closes#43809
