Rollup merge of #64094 - kawa-yoiko:rustdoc-search, r=GuillaumeGomez
Improve searching in rustdoc and add tests
👋 I have made searching in rustdoc more intuitive, added a couple more tests and made a little shell script to aid testing. Closes #63005.
It took me quite a while to figure out how to run the tests for rustdoc (instead of running tests for other crates with rustdoc); the only pointer I found was [hidden in the rustc book](https://rust-lang.github.io/rustc-guide/rustdoc.html#cheat-sheet). Maybe this could be better documented? I shall be delighted to help if it is desirable.
Auto merge of #64172 - Centril:rollup-8i8oh54, r=Centril
Rollup of 11 pull requests
Successful merges:
- #62848 (Use unicode-xid crate instead of libcore)
- #63774 (Fix `window.hashchange is not a function`)
- #63930 (Account for doc comments coming from proc macros without spans)
- #64003 (place: Passing `align` = `layout.align.abi`, when also passing `layout`)
- #64030 (Fix unlock ordering in SGX synchronization primitives)
- #64041 (use TokenStream rather than &[TokenTree] for built-in macros)
- #64051 (Add x86_64-linux-kernel target)
- #64063 (Fix const_err with `-(-0.0)`)
- #64083 (Point at appropriate arm on type error on if/else/match with one non-! arm)
- #64100 (Fix const eval bug breaking run-pass tests in Miri)
- #64157 (Opaque type locations in error message for clarity.)
Rollup merge of #64100 - wesleywiser:fix_miri_const_eval, r=oli-obk
Fix const eval bug breaking run-pass tests in Miri
PR #63580 broke miri's ability to run the run-pass test suite with MIR
optimizations enabled. The issue was that we weren't properly handling
the substs and DefId associated with a Promoted value. This didn't break
anything in rustc because in rustc this code runs before the Inliner
pass which is where the DefId and substs can diverge from their initial
values. It broke Miri though because it ran this code again after
running the optimization pass.
Rollup merge of #64003 - Dante-Broggi:place-align-in-layout, r=matthewjasper
place: Passing `align` = `layout.align.abi`, when also passing `layout`
Of the calls changed:
7/12 use `align` = `layout.align.abi`.
`from_const_alloc` uses `alloc.align`, but that is `assert_eq!` to `layout.align.abi`.
only 4/11 use something interesting for `align`.
Rollup merge of #62848 - matklad:xid-unicode, r=petrochenkov
Use unicode-xid crate instead of libcore
This PR proposes to remove `char::is_xid_start` and `char::is_xid_continue` functions from `libcore` and use `unicode_xid` crate from crates.io (note that this crate is already present in rust-lang/rust's Cargo.lock).
Reasons to do this:
* removing rustc-binary-specific stuff from libcore
* making sure that, across the ecosystem, there's a single definition of what rust identifier is (`unicode-xid` has almost 10 million downs, as a `proc_macro2` dependency)
* making it easier to share `rustc_lexer` crate with rust-analyzer: no need to `#[cfg]` if we are building as a part of the compiler
Reasons not to do this:
* increased maintenance burden: we'll need to upgrade unicode version both in libcore and in unicode-xid. However, this shouldn't be a too heavy burden: just running `./unicode.py` after new unicode version. I (@matklad) am ready to be a t-compiler side maintainer of unicode-xid. Moreover, given that xid-unicode is an important dependency of syn, *someone* needs to maintain it anyway.
* xid-unicode implementation is significantly slower. It uses a more compact table with binary search, instead of a trie. However, this shouldn't matter in practice, because we have fast-path for ascii anyway, and code size savings is a plus. Moreover, in #59706 not using libcore turned out to be *faster*, presumably beacause checking for whitespace with match is even faster.
<details>
<summary>old description</summary>
Followup to #59706
r? @eddyb
Note that this doesn't actually remove tables from libcore, to avoid conflict with https://github.com/rust-lang/rust/pull/62641.
cc https://github.com/unicode-rs/unicode-xid/pull/11
Auto merge of #62800 - albins:polonius-initialization-1, r=nikomatsakis
Extend Polonius fact generation for (some) move tracking
This PR will extend rustc to emit facts used for tracking moves and initialization in Polonius. It is most likely the final part of my master's thesis work.
Auto merge of #64160 - Centril:rollup-vrfj1pt, r=Centril
Rollup of 15 pull requests
Successful merges:
- #62860 (Stabilize checked_duration_since for 1.38.0)
- #63549 (Rev::rposition counts from the wrong end)
- #63985 (Stabilize pin_into_inner in 1.39.0)
- #64005 (Add a `Place::is_indirect` method to determine whether a `Place` contains a `Deref` projection)
- #64031 (Harden `param_attrs` test wrt. usage of a proc macro `#[attr]`)
- #64038 (Check impl trait substs when checking for recursive types)
- #64043 (Add some more tests for underscore imports)
- #64092 (Update xLTO compatibility table in rustc book.)
- #64110 (Refer to "`self` type" instead of "receiver type")
- #64120 (Move path parsing earlier)
- #64123 (Added warning around code with reference to uninit bytes)
- #64128 (unused_parens: account for or-patterns and `&(mut x)`)
- #64141 (Minimize uses of `LocalInternedString`)
- #64142 (Fix doc links in `std::cmp` module)
- #64148 (fix a few typos in comments)
Rollup merge of #64141 - nnethercote:minimize-LocalInternedString, r=petrochenkov
Minimize uses of `LocalInternedString`
`LocalInternedString` is described as "An alternative to `Symbol` and `InternedString`, useful when the chars within the symbol need to be accessed. It is best used for temporary values."
This PR makes the code match that comment, by removing all non-local uses of `LocalInternedString`. This allows the removal of a number of operations on `LocalInternedString` and a couple of uses of `unsafe`.
Rollup merge of #64123 - danielhenrymantilla:add_comment_about_uninit_integers, r=Centril
Added warning around code with reference to uninit bytes
Officially, uninitialized integers, and therefore, Rust references to them are _invalid_ (note that this may evolve into official defined behavior (_c.f._, https://github.com/rust-lang/unsafe-code-guidelines/issues/71)).
However, `::std` uses references to uninitialized integers when working with the `Read::initializer` feature (#42788), since it relies on this unstably having defined behavior with the current implementation of the compiler (IIUC).
Hence the comment to disincentivize people from using this pattern outside the standard library.
Rollup merge of #64031 - Centril:param-attrs-no-macros-test, r=nikomatsakis
Harden `param_attrs` test wrt. usage of a proc macro `#[attr]`
The `param-attrs-builtin-attrs.rs` test file uses the `#[test]` attribute which should cover this but `#[test]` isn't a proc macro attribute so we add another test to be on the safe side. This intends to address https://github.com/rust-lang/rust/pull/64010#issuecomment-526564316.
r? @nikomatsakis
cc @c410-f3r @petrochenkov
cc https://github.com/rust-lang/rust/issues/60406
Rollup merge of #64005 - ecstatic-morse:is-indirect, r=oli-obk
Add a `Place::is_indirect` method to determine whether a `Place` contains a `Deref` projection
Working on #63860 requires tracking some property about each local. This requires differentiating `Place`s like `x` and `x.field[index]` from ones like `*x` and `*x.field`, since the first two will always access the same region of memory as `x` while the latter two may access any region of memory. This functionality is duplicated in various places across the compiler. This PR adds a helper method to `Place` which determines whether that `Place` has a `Deref` projection at any point and changes some existing code to use the new method.
I've not converted `qualify_consts.rs` to use the new method, since it's not a trivial conversion and it will get replaced anyway by #63860. There may be other potential uses besides the two I change in this PR.
Auto merge of #63825 - nathanwhit:check-run-results, r=Mark-Simulacrum
Allow checking of run-pass execution output in compiletest
Closes #63751
Adds a `check-run-results` flag to compiletest headers, which if enabled checks the output of the execution of a run-pass test's binary against expected output.
remove XID and Pattern_White_Space unicode tables from libcore
They are only used by rustc_lexer, and are not needed elsewhere.
So we move the relevant definitions into rustc_lexer (while the actual
unicode data comes from the unicode-xid crate) and make the rest of
the compiler use it.
Auto merge of #63166 - ksqsf:master, r=alexcrichton
Add Result::cloned{,_err} and Result::copied{,_err}
This is a little nice addition to `Result`.
1. I'm not sure how useful are `cloned_err` and `copied_err`, but for the sake of completeness they are here.
2. Naming is similar to `map`/`map_err`. I thought about naming `cloned` as `cloned_ok` and add another method called `cloned` that clones both Ok and Err, but `cloned_ok` should be more prevalent than `cloned_both`.
This also switches to the intended emission of `var_drop_used` fact emission,
where that fact is always emitted on a drop-use of a variable, regardless of its
initialization status, as Polonius now handles that.
The remote-test-client outputs a message of the form "uploaded
"<build_dir>/<executable_path>", waiting for result" onto stdout when
executing a test, which is then captured in the process result. This needs to be removed when
comparing the results of the run-pass test execution.
Auto merge of #64127 - Centril:rollup-dfgb9h8, r=Centril
Rollup of 5 pull requests
Successful merges:
- #64049 (Emit a single error on if expr with expectation and no else clause)
- #64056 (Account for arbitrary self types in E0599)
- #64058 (librustc_errors: Extract sugg/subst handling into method)
- #64071 (use just one name when parameters and fields are the same)
- #64104 (Emit error on intrinsic to fn ptr casts)
Rollup merge of #64104 - Mark-Simulacrum:intrinsic-fn-ptr-ice, r=estebank
Emit error on intrinsic to fn ptr casts
I'm not sure if a type error is the best way of doing this but it seemed like a relatively correct place to do it, and I expect this is a pretty rare case to hit anyway.
Rollup merge of #64058 - phansch:refactor_out_method, r=estebank
librustc_errors: Extract sugg/subst handling into method
An initial refactoring before working on #61809.
This moves the whole block into a method so that it can be reused in the
annotate-snippet emitter. The method is already used in the new emitter, but
there's no UI tests with suggestions included in this PR.
A first look at some UI tests with suggestions showed that there's some
more work to do in [annotate-snippet-rs][annotate-snippet-rs] before the new output is closer to the
current one, so I opted to do that in a second step.
Auto merge of #63869 - GuillaumeGomez:fix-build-failure, r=Mark-Simulacrum
Fix build failure in case file doesn't exist
It fixes the following issue:
```bash
$ ./x.py test src/tools/linkchecker ./build/x86_64-apple-darwin/doc/ --stage 1
Updating only changed submodules
Submodules updated in 0.05 seconds
Finished dev [unoptimized] target(s) in 0.15s
thread 'main' panicked at 'source "/Users/imperio/rust/rust/build/x86_64-apple-darwin/doc/version_info.html" failed to get metadata: No such file or directory (os error 2)', src/build_helper/lib.rs:179:19
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
failed to run: /Users/imperio/rust/rust/build/bootstrap/debug/bootstrap test src/tools/linkchecker ./build/x86_64-apple-darwin/doc/ --stage 1
Build completed unsuccessfully in 0:00:01
```
If the file doesn't exist, it makes sense anyway to just run the command in order to generate it.
Auto merge of #63561 - HeroicKatora:alloc-private-bytes, r=oli-obk
Make Allocation::bytes private
Fixes #62931.
Direct immutable access to the bytes is still possible but redirected through the new method `raw_bytes_with_undef_and_ptr`, similar to `get_bytes_with_undef_and_ptr` but without requiring an interpretation context and not doing *any* relocation or bounds checks. The `size` of the allocation is stored separately which makes access as `Size` and `usize` more ergonomic.
Wesley Wiser [Thu, 29 Aug 2019 00:18:25 +0000 (20:18 -0400)]
Fix const eval bug breaking run-pass tests in Miri
PR #63580 broke miri's ability to run the run-pass test suite with MIR
optimizations enabled. The issue was that we weren't properly handling
the substs and DefId associated with a Promoted value. This didn't break
anything in rustc because in rustc this code runs before the Inliner
pass which is where the DefId and substs can diverge from their initial
values. It broke Miri though because it ran this code again after
running the optimization pass.
Ignores run-pass tests with the `check-run-results` flag enabled for the
wasm32-bare ("wasm32-unknown-unknown") target, as it does not support
printing to stdout/stderr.
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