Fix ICE with unsized type in const pattern
Fixes#87046. The `deref_const()` query currently contains the following check:
e9a387d6cf/compiler/rustc_mir/src/const_eval/mod.rs (L191-L204)
i.e. this will cause an ICE for every unsized type except slices. An error is reported with my changes if such a type is used as a const pattern (this should not be a breaking change, since so far, this has caused an ICE).
Fix rust-analyzer install when not available.
This changes it so that `x.py install` won't fail if rust-analyzer isn't available. This was changed in #86568 to handle the case where installing on stable/beta, and `extended=true`, to skip rust-analyzer. But I neglected to update the install part to also ignore it.
Fixes#86999
Fix rendering of reexported macros 2.0 and fix visibility of reexported items
So, this PR grew a bit out of focus, it does the following things:
* Fixes#86276.
* Fixes visibility display for reexported items: it now takes the visibility of the "use" statement rather than the visibility of the reexported item itself).
* Fixes the display of reexported items if "--document-private-items" option is used. Before, they were simply skipped.
* Fixes inconsistency on typedef items: they didn't display their visibility contrary to other items.
I added tests to check everything listed above.
cc `@camelid` `@ollie27` (in case one of you want to review?)
r? `@jyn514`
Improve error reporting for modifications behind `&` references
I had a look at #84210 and noticed that #85823 has effectively already fixed#84210.
However, the string matching in #85823 is _very_ crude and already breaks down when a variable name starts with `mut`. I have made this a bit more robust; further improvements could definitely be made but are complicated by the lack of information provided by an earlier pass:
ce331ee6ee/compiler/rustc_mir_build/src/build/matches/mod.rs (L2103-L2107)
I have also fixed a missing comma in the error message.
Report an error if resolution of closure call functions failed
This pull request fixes#86238. The current implementation seems to assume that resolution of closure call functions (I'm not sure what the proper term is; I mean `call` of `Fn` etc.) can never fail:
60f1a2fc4b/compiler/rustc_typeck/src/check/callee.rs (L590-L595)
But actually, it can, if the `fn`/`fn_mut`/`fn_once` lang items are not defined, or don't have an associated `call`/`call_mut`/`call_once` function, leading to the ICE described in #86238. I have therefore turned the `span_bug!()` into an error message, which prevents the ICE.
Do not suggest adding a semicolon after `?`
Fixes#87051. I have only modified `report_return_mismatched_types()`, i.e. my changes only affect suggestions to add `;` for return type mismatches, but this never makes sense after `?`, because the function cannot return `()` if `?` is used (it has to return a `Result` or an `Option`), and a semicolon won't help if the expected and actual `Err` types differ, even if the expected one is `()`.
cleanup(rustdoc): remove unused function getObjectNameById
This function was used in an earlier version, when idx's were used to serialize function inputs and outputs. That's not done any more, so removed the JS-side support for it.
Rustdoc: Change all 'optflag' arguments to 'optflagmulti'
Because specifying these flags multiple times will never be discernibly different in functionality from specifying them a single time, there is no reason to fail and report an error to the user.
This might be a slightly controversial change. it's tough to say, but it's hard to imagine a case where somebody was depending on this behavior, and doing this seem actively better for the user.
This originally came up in discussion of a fix for [Cargo #8373](https://github.com/rust-lang/cargo/issues/8373), in [Cargo PR #8422](https://github.com/rust-lang/cargo/pull/8422).
The issue is that Cargo will automatically add things like `--document-private-items` to binaries, because it's the only thing that makes sense there. Then some poor user comes along and adds `--document-private-items` to their `rustdoc` flags for the project and suddenly they're getting errors for specifying a flag twice and need to track down which targets to actually add it to without getting duplicates for reasons they won't understand without deep understanding of Cargo behavior.
We're apparently hesitant to inspect `rustdoc` flags provided by the user directly in Cargo, because they're supposed to be opaque, so looking to see if it's already provided before adding it is evidently a non-starter. In trying to resolve that, one suggestion I came up with was to just change `rustdoc` to support passing the flag multiple times, because the user's intent should be clear and it's not *really* an error, so maybe this is a case of 'be permissive in what you accept'.
This PR is an attempt to do that in a straightforward manner for purposes of discussion.
Stabilize "RangeFrom" patterns in 1.55
Implements a partial stabilization of #67264 and #37854.
Reference PR: https://github.com/rust-lang/reference/pull/900
# Stabilization Report
This stabilizes the `X..` pattern, shown as such, offering an exhaustive match for unsigned integers:
```rust
match x as u32 {
0 => println!("zero!"),
1.. => println!("positive number!"),
}
```
Currently if a Rust author wants to write such a match on an integer, they must use `1..={integer}::MAX` . By allowing a "RangeFrom" style pattern, this simplifies the match to not require the MAX path and thus not require specifically repeating the type inside the match, allowing for easier refactoring. This is particularly useful for instances like the above case, where different behavior on "0" vs. "1 or any positive number" is desired, and the actual MAX is unimportant.
Notably, this excepts slice patterns which include half-open ranges from stabilization, as the wisdom of those is still subject to some debate.
## Practical Applications
Instances of this specific usage have appeared in the compiler:
16143d1067/compiler/rustc_middle/src/ty/inhabitedness/mod.rs (L219)673d0db5e3/compiler/rustc_ty_utils/src/ty.rs (L524)
And I have noticed there are also a handful of "in the wild" users who have deployed it to similar effect, especially in the case of rejecting any value of a certain number or greater. It simply makes it much more ergonomic to write an irrefutable match, as done in Katholieke Universiteit Leuven's [SCALE and MAMBA project](05e5db00d5/WebAssembly/scale_std/src/fixed_point.rs (L685-L695)).
## Tests
There were already many tests in [src/test/ui/half-open-range/patterns](90a2e5e3fe/src/test/ui/half-open-range-patterns), as well as [generic pattern tests that test the `exclusive_range_pattern` feature](673d0db5e3/src/test/ui/pattern/usefulness/integer-ranges/reachability.rs), many dating back to the feature's introduction and remaining standing to this day. However, this stabilization comes with some additional tests to explore the... sometimes interesting behavior of interactions with other patterns. e.g. There is, at least, a mild diagnostic improvement in some edge cases, because before now, the pattern `0..=(5+1)` encounters the `half_open_range_patterns` feature gate and can thus emit the request to enable the feature flag, while also emitting the "inclusive range with no end" diagnostic. There is no intent to allow an `X..=` pattern that I am aware of, so removing the flag request is a strict improvement. The arrival of the `J | K` "or" pattern also enables some odd formations.
Some of the behavior tested for here is derived from experiments in this [Playground](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=58777b3c715c85165ac4a70d93efeefc) example, linked at https://github.com/rust-lang/rust/issues/67264#issuecomment-812770692, which may be useful to reference to observe the current behavior more closely.
In addition tests constituting an explanation of the "slicing range patterns" syntax issue are included in this PR.
## Desiderata
The exclusive range patterns and half-open range patterns are fairly strongly requested by many authors, as they make some patterns much more natural to write, but there is disagreement regarding the "closed" exclusive range pattern or the "RangeTo" pattern, especially where it creates "off by one" gaps in the presence of a "catch-all" wildcard case. Also, there are obviously no range analyses in place that will force diagnostics for e.g. highly overlapping matches. I believe these should be warned on, ideally, and I think it would be reasonable to consider such a blocker to stabilizing this feature, but there is no technical issue with the feature as-is from the purely syntactic perspective as such overlapping or missed matches can already be generated today with such a catch-all case. And part of the "point" of the feature, at least from my view, is to make it easier to omit wildcard matches: a pattern with such an "open" match produces an irrefutable match and does not need the wild card case, making it easier to benefit from exhaustiveness checking.
## History
- Implemented:
- Partially via exclusive ranges: https://github.com/rust-lang/rust/pull/35712
- Fully with half-open ranges: https://github.com/rust-lang/rust/pull/67258
- Unresolved Questions:
- The precedence concerns of https://github.com/rust-lang/rust/pull/48501 were considered as likely requiring adjustment but probably wanting a uniform consistent change across all pattern styles, given https://github.com/rust-lang/rust/issues/67264#issuecomment-720711656, but it is still unknown what changes might be desired
- How we want to handle slice patterns in ranges seems to be an open question still, as witnessed in the discussion of this PR!
I checked but I couldn't actually find an RFC for this, and given "approved provisionally by lang team without an RFC", I believe this might require an RFC before it can land? Unsure of procedure here, on account of this being stabilizing a subset of a feature of syntax.
r? `@scottmcm`
Improves migrations lint for RFC2229
This PR improves the current disjoint capture migration lint by providing more information on why drop order or auto trait implementation for a closure is impacted by the use of the new feature.
The drop order migration lint will now look something like this:
```
error: changes to closure capture in Rust 2021 will affect drop order
--> $DIR/significant_drop.rs:163:21
|
LL | let c = || {
| ^^
...
LL | tuple.0;
| ------- in Rust 2018, closure captures all of `tuple`, but in Rust 2021, it only captures `tuple.0`
...
LL | }
| - in Rust 2018, `tuple` would be dropped here, but in Rust 2021, only `tuple.0` would be dropped here alongside the closure
```
The auto trait migration lint will now look something like this:
```
error: changes to closure capture in Rust 2021 will affect `Send` trait implementation for closure
--> $DIR/auto_traits.rs:14:19
|
LL | thread::spawn(move || unsafe {
| ^^^^^^^^^^^^^^ in Rust 2018, this closure would implement `Send` as `fptr` implements `Send`, but in Rust 2021, this closure would no longer implement `Send` as `fptr.0` does not implement `Send`
...
LL | *fptr.0 = 20;
| ------- in Rust 2018, closure captures all of `fptr`, but in Rust 2021, it only captures `fptr.0`
```
r? `@nikomatsakis`
Closes https://github.com/rust-lang/project-rfc-2229/issues/54
Add clobber-only register classes for asm!
These are needed to properly express a function call ABI using a clobber
list, even though we don't support passing actual values into/out of
these registers.
Because specifying these flags multiple times will never be discernibly different in functionality from specifying them a single time, there is no reason to fail and report an error to the user.
This function was used in an earlier version, when idx's were used
to serialize function inputs and outputs. That's not done any more,
so removed the JS-side support for it.
remove const_raw_ptr_to_usize_cast feature
This feature currently has the strange status of "const-only `unsafe`", which was an experiment that we no longer think is a good idea. We need to find better ways to enable things like "messing with the low bits of a pointer" during CTFE.
r? `@oli-obk`
Fix several ICEs related to malformed `#[repr(...)]` attributes
This PR fixes#83921. #83921 actually contains two related but distinct issues (one of them incorrectly reported as a duplicate in https://github.com/rust-lang/rust/issues/83921#issuecomment-814640734):
In the first, a call to `delay_span_bug` leads to an ICE when compiling with `-Zunpretty=everybody_loops` (and some other pretty-printing modes), because the corresponding error is emitted in a later pass, which does not run when only pretty-printing is requested.
The second issue is about parsing `#[repr(...)]` attributes. Currently, all of the following cause an ICE when applied to a struct/enum:
```rust
#[repr(packed())]
#[repr(align)]
#[repr(align(2, 4))]
#[repr(align())]
#[repr(i8())]
#[repr(u32(42))]
#[repr(i64 = 2)]
```
I have fixed this by expanding the well-formedness checks in `find_repr_attrs()`.
These are needed to properly express a function call ABI using a clobber
list, even though we don't support passing actual values into/out of
these registers.
Support forwarding caller location through trait object method call
Since PR #69251, the `#[track_caller]` attribute has been supported on
traits. However, it only has an effect on direct (monomorphized) method
calls. Calling a `#[track_caller]` method on a trait object will *not*
propagate caller location information - instead, `Location::caller()` will
return the location of the method definition.
This PR forwards caller location information when `#[track_caller]` is
present on the method definition in the trait. This is possible because
`#[track_caller]` in this position is 'inherited' by any impls of that
trait, so all implementations will have the same ABI.
This PR does *not* change the behavior in the case where
`#[track_caller]` is present only on the impl of a trait.
While all implementations of the method might have an explicit
`#[track_caller]`, we cannot know this at codegen time, since other
crates may have impls of the trait. Therefore, we keep the current
behavior of not forwarding the caller location, ensuring that all
implementations of the trait will have the correct ABI.
See the modified test for examples of how this works
If crate declares `rust_eh_personality`, re-use existing declaration
as otherwise attempts to set function attributes that follow the
declaration will fail (unless it happens to have exactly the same
type signature as the one predefined in the compiler).
The LLD + ThinLTO __morestack bug has been fixed in 12.0.1, so
we can now update our clang version. This also means that we no
longer need to build Python 2.
only check cg defaults wf once instantiated
the previous fixmes here didn't make too much sense as I didn't yet fully understand the code further below.
That code only runs if the predicates using our generic param default are fully concrete after substituting our default, which never happens if our default is generic.
r? `@oli-obk` `@BoxyUwU`
Remove `missing_docs` lint on private 2.0 macros
798baebde1/compiler/rustc_lint/src/builtin.rs (L573-L584)
This code is the source of #57569. The problem is subtle, so let me point it out. This code makes the mistake of assuming that all of the macros in `krate.exported_macros` are exported.
...Yeah. For some historical reason, all `macro` macros are marked as exported, regardless of whether they actually are, which is dreadfully confusing. It would be more accurate to say that `exported_macros` currently contains only macros that have paths.
This PR renames `exported_macros` to `importable_macros`, since these macros can be imported with `use` while others cannot. It also fixes the code above to no longer lint on private `macro` macros, since the `missing_docs` lint should only appear on exported items.
Fixes#57569.
Add support for raw-dylib with stdcall, fastcall functions
Next stage of work for #58713: allow `extern "stdcall"` and `extern "fastcall"` with `#[link(kind = "raw-dylib")]`.
I've deliberately omitted support for vectorcall, as that doesn't currently work, and I wanted to get this out for review. (I haven't really investigated the vectorcall failure much yet, but at first (very cursory) glance it appears that the problem is elsewhere.)
Use #[track_caller] in const panic diagnostics.
This change stops const panic diagnostics from reporting inside #[track_caller] functions by skipping over them.
Change linked tracking issue for more_qualified_paths
This updates the linked tracking issue for the `more_qualified_paths` feature from the implementation PR #80080 to an actual tracking issue #86935.
Fix double warning about illegal floating-point literal pattern
This PR fixes#86600. The problem is that the `ConstToPat` struct contains a field `include_lint_checks`, which determines whether lints should be emitted or not, but this field is currently not obeyed at one point, leading to a warning being emitted more than once. I have fixed this behavior here.
Account for capture kind in auto traits migration
Modifies the current auto traits migration for RFC2229 so it takes into account capture kind
Closes https://github.com/rust-lang/project-rfc-2229/issues/51
r? `@nikomatsakis`
2229: Reduce the size of closures with `capture_disjoint_fields`
One key observation while going over the closure size profile of rustc
was that we are disjointly capturing one or more fields starting at an
immutable reference.
Disjoint capture over immutable reference doesn't add too much value
because the fields can either be borrowed immutably or copied.
One possible edge case of the optimization is when a fields of a struct
have a longer lifetime than the structure, therefore we can't completely
get rid of all the accesses on top of sharef refs, only the rightmost
one. Here is a possible example:
```rust
struct MyStruct<'a> {
a: &'static A,
b: B,
c: C<'a>,
}
fn foo<'a, 'b>(m: &'a MyStruct<'b>) -> impl FnMut() + 'static {
let c = || drop(&*m.a.field_of_a);
// Here we really do want to capture `*m.a` because that outlives `'static`
// If we capture `m`, then the closure no longer outlives `'static'
// it is constrained to `'a`
}
```
r? `@nikomatsakis`
Document rustdoc with `--document-private-items`
The `tool_doc` macro introduced in #86737 did not use `false` as the default value for `binary` when it is not provided, so the `if` is not even expanded and thus the argument is never provided if the `binary` argument isn't.
Resolves#86900
r? ```@Mark-Simulacrum```
Checking that function is const if marked with rustc_const_unstable
Fixes#69630
This one is still missing tests to check the behavior but I checked by hand and it seemed to work.
I would not mind some direction for writing those unit tests!
Support pretty printing slices using GDB
Support pretty printing `&[T]`, `&mut [T]` and `&mut str` types using GDB.
Support pretty printing `&mut [T]` and `&mut str` types using LLDB.
Fixes#85219.
remove trailing newline
fix: test with attribute but missing const
Update compiler/rustc_passes/src/stability.rs
Co-authored-by: Léo Lanteri Thauvin <leseulartichaut@gmail.com>
Add test for extern functions
fix: using span_help instead of span_suggestion
add test for some ABIs + fmt fix
Update compiler/rustc_passes/src/stability.rs
Co-authored-by: Léo Lanteri Thauvin <leseulartichaut@gmail.com>
Refractor and add test for `impl const`
Add test to make sure no output + cleanup condition
-----------------------------
remove stdcall test, failing CI test
C abi is already tested in this, so it is not that useful to test another one.
The tested code is blind to which specific ABI for now, as long as it's not an intrinsic one
Clean up rustdoc static files
The `html/static` of rustdoc was starting to be quite a mess... So I moved files in sub-folders to make it easier to follow. Here what remains in `html/static` folder:
```
$ ls
COPYRIGHT.txt css fonts images js LICENSE-APACHE.txt LICENSE-MIT.txt
```
cc ```@jyn514```
r? ```@Manishearth```
Fix ICE when misplaced visibility cannot be properly parsed
Fixes#86895
The issue was that a failure to parse the visibility was causing the original error to be dropped before being emitted.
The resulting error isn't quite as nice as when the visibility is parsed properly, but I'm not sure which error to prioritize here. Displaying both errors might be too confusing.
r? ```@estebank```
Sync rustc_codegen_cranelift
The main hightlight this sync is basic support for AArch64. Most things should work on Linux, but there does seem to be an ABI incompatibility causing proc-macros to crash, see https://github.com/bjorn3/rustc_codegen_cranelift/issues/1184. Thanks to ```@afonso360``` for implementing all Cranelift features that were necessary to compile for AArch64 using cg_clif. Also thanks to ```@shamatar``` for implementing the `llvm.x86.addcarry.64` and `llvm.x86.subborrow.64` llvm intrinsics used by num-bigint (https://github.com/bjorn3/rustc_codegen_cranelift/pull/1178) and ```@eggyal``` for implementing multi-threading support for the lazy jit mode. (https://github.com/bjorn3/rustc_codegen_cranelift/pull/1166)
r? ```@ghost```
```@rustbot``` label +A-codegen +A-cranelift +T-compiler
Recover from `&dyn mut ...` parse errors
Consider this example:
```rust
fn main() {
let r: &dyn mut Trait;
}
```
This currently leads to:
```
error: expected one of `!`, `(`, `;`, `=`, `?`, `for`, lifetime, or path, found keyword `mut`
--> src/main.rs:2:17
|
2 | let r: &dyn mut Trait;
| ^^^ expected one of 8 possible tokens
error: aborting due to previous error
```
However, especially for beginners, I think it is easy to get `&dyn mut` and `&mut dyn` confused. With my changes, I get a help message, and the parser even recovers:
```
error: `mut` must precede `dyn`
--> test.rs:2:12
|
2 | let r: &dyn mut Trait;
| ^^^^^^^^ help: place `mut` before `dyn`: `&mut dyn`
error[E0405]: cannot find trait `Trait` in this scope
--> test.rs:2:21
|
2 | let r: &dyn mut Trait;
| ^^^^^ not found in this scope
error: aborting due to 2 previous errors
```
Support lint tool names in rustc command line options
When rustc is running without a lint tool such as clippy enabled, options for lints such as `clippy::foo` are meant to be ignored. This was already working for those specified by attrs, such as `#![allow(clippy::foo)]`, but this did not work for command line arguments like `-A clippy::foo`. This PR fixes that issue.
Note that we discovered this issue while discussing https://github.com/rust-lang/cargo/issues/5034.
Fixes#86628.
This change merges `check_lint_and_tool_name` into `check_lint_name` in
order to avoid having two very similar functions.
Also adds the `.stderr` file back for the test case, since apparently
it is still needed.
All eabi targets have target_abi = "eabi".
All eabihf targets have target_abi = "eabihf".
armv6_unknown_freebsd and armv7_unknown_freebsd have target_abi = "eabihf".
All abi64 targets have target_abi = "abi64".
All ilp32 targets have target_abi = "ilp32".
All softfloat targets have target_abi = "softfloat".
All *-uwp-windows-* targets have target_abi = "uwp".
All spe targets have target_abi = "spe".
All macabi targets have target_abi = "macabi".
aarch64-apple-ios-sim has target_abi = "sim".
x86_64-fortanix-unknown-sgx has target_abi = "fortanix".
x86_64-unknown-linux-gnux32 has target_abi = "x32".
Add FIXME entries for targets for which existing values need to change
once cfg_target_abi becomes stable. (All of them are tier 3 targets.)
Add a test for target_abi in `--print cfg`.
Add an `abi` field to `TargetOptions`, defaulting to "". Support using
`cfg(target_abi = "...")` for conditional compilation on that field.
Gated by `feature(cfg_target_abi)`.
Add a test for `target_abi`, and a test for the feature gate.
Add `target_abi` to tidy as a platform-specific cfg.
This does not add an abi to any existing target.
Update books
## nomicon
8 commits in b9ca313e687c991223e23e5520529815dc281205..7a13537f96af4b9b8e3ea296d6e5c3c7ab72ce9f
2021-06-22 12:02:20 -0400 to 2021-07-05 23:34:47 -0400
- Apply review comments
- Fix some style issues
- Move the list of coercions to the reference
- Add an example that shows the null-pointer opt does not happen
- Remove casting list from the nomicon (rust-lang-nursery/nomicon#287)
- Audit `ignore` annotations (rust-lang-nursery/nomicon#288)
- rename typo "lifetime" to "reference" (rust-lang-nursery/nomicon#286)
- Add an incomplete warning to the top page (rust-lang-nursery/nomicon#274)
## reference
7 commits in d9699fa8f3186440fdaadd703d63d8d42322c176..ab60513a3a5a0591e237fddff5d027a982648392
2021-06-21 12:23:10 -0700 to 2021-07-05 08:27:31 -0700
- fix grammar in Expressions (rust-lang-nursery/reference#1057)
- fix comment in function parameter drop scope example (rust-lang-nursery/reference#1056)
- fix typo in macro-ambiguity.md (rust-lang-nursery/reference#1058)
- Mention (negative) infinity values on float-to-int casting (rust-lang-nursery/reference#1054)
- (rust-lang-nursery/reference#841)
- Missing TypeParamBounds in TypeAlias (rust-lang-nursery/reference#1036)
- Be more precise about array offset in type layouts (rust-lang-nursery/reference#1034)
## book
34 commits in 55a26488ddefc8433e73a2e8352d70f7a5c7fc2b..a90f07f1e9a7fc75dc9105a6c6f16d5c13edceb0
2021-05-09 12:03:18 -0500 to 2021-07-05 14:43:12 -0400
- Clarify ?Sized syntax. Fixesrust-lang/book#2422.
- Add some notes that macros are different than functions
- Break up a long sentence. Fixesrust-lang/book#2329.
- Further clarify and make consistent the reference to deref coercion
- Update ch04-03-slices.md
- add usage for `String` reference
- Update ch15-02-deref.md (rust-lang/book#2780)
- Remove claim about performance of i32
- Reword to avoid awkward pluralization
- Make the link to the reference relative
- Merge remote-tracking branch 'origin/pr/2753'
- Reword number of library crates a package contains (rust-lang/book#2750)
- Clarify explanation of why you can test private functions; add link
- Merge remote-tracking branch 'origin/pr/2743'
- Fix code hiding that I broke in eb60fedc9
- Link to the exact later section we're talking about
- improve cross-references for newtype pattern
- ch12-05, listing 12-20: Add missing "does not compile" warning (rust-lang/book#2731)
- cargo format
- Merge remote-tracking branch 'origin/pr/2724'
- Remove ordinal numbers and only refer to indexes to avoid confusion
- Let's mention the former and current authors of tlborm.
- Update tlborm link to point to Veykril's up-to-date version (rust-lang/book#2722)
- Merge remote-tracking branch 'origin/pr/2720'
- Describe the ferris pictures in the alt text
- Merge remote-tracking branch 'origin/pr/2707'
- Reword ... explanation to include the word deprecated, list that first
- Precise that the `...` inclusive range pattern has been replaces (rust-lang/book#2714)
- (rust-lang/book#2696)
- fix typo: missing "type" after generic (rust-lang/book#2777)
- (rust-lang/book#2709)
- Remove sentence about how Rust used to be
- Fix a potentially confusing statement about static lifetimes of static variables. (rust-lang/book#2692)
- Replace 'which'. (rust-lang/book#2663)
## rust-by-example
2 commits in 805e016c5792ad2adabb66e348233067d5ea9f10..028f93a61500fe8f746ee7cc6b204ea6c9f42935
2021-05-20 17:08:34 -0300 to 2021-07-06 06:28:53 -0300
- Fix a couple of typos in the `integration_testing.md` file (rust-lang/rust-by-example#1448)
- Fix Structures type list (rust-lang/rust-by-example#1446)
## rustc-dev-guide
13 commits in fe34beddb41dea5cb891032512a8d5b842b99696..60e282559104035985331645907c3d9f842312c5
2021-06-21 21:50:12 +0200 to 2021-07-05 11:21:03 -0400
- Fixed typos in inline code
- Document lang items (rust-lang/rustc-dev-guide#1119)
- More specifics on what future-incompatible lints are used for
- Fix line lens
- Update information on lints particularly on future-incompatible
- Update section of lint store
- Update around half of the January 2021 date references (rust-lang/rustc-dev-guide#1155)
- Create issues for many TODOs (rust-lang/rustc-dev-guide#1163)
- Links from rustc-dev-guide to std-dev-guide (rust-lang/rustc-dev-guide#1152)
- Document how to mark features as incomplete (rust-lang/rustc-dev-guide#1151)
- Remove requests or suggestions about rebase and fixup contradictory to rust-highfive bot comment (rust-lang/rustc-dev-guide#1111)
- Generate glossary table correctly (rust-lang/rustc-dev-guide#1146)
- Correct the wrong serial number (rust-lang/rustc-dev-guide#1147)
## edition-guide
3 commits in c74b2a0d6bf55774cf15d69f05dfe05408b8f81a..5d57b3832f8d308a9f478ce0a69799548f27ad4d
2021-06-14 10:48:27 -0700 to 2021-07-05 10:33:32 +0200
- Add more info for warnings promoted to errors (rust-lang-nursery/edition-guide#247)
- Create triagebot.toml
- Clarify snippets in 2021 panic docs. (rust-lang-nursery/edition-guide#245)
## embedded-book
1 commits in cbec77fbd8eea0c13e390dd9eded1ae200e811d1..506840eb73b0749336e1d5274e16d6393892ee82
2021-06-10 06:26:32 +0000 to 2021-06-24 00:01:32 +0000
- Update book to track quickstart changes (rust-embedded/book#296)
Migrate `cpu-usage-over-time.py` to Python 3
The only change here is a fix for `sys.platform` on Linux. Python 3.3 changed the API to return `"linux"` instead of `"linux2"`/`"linux3"`, so this PR uses `.startswith("linux")` to make the code work on Python 3 without breaking Python 2.
Clean up rustdoc IDs
I cherry-picked the commit from https://github.com/rust-lang/rust/pull/86178. It adds missing rustdoc IDs (for the HTML) and remove unused ones.
cc `@camelid`
r? `@jyn514`
Rename some Rust 2021 lints to better names
Based on conversation in https://github.com/rust-lang/rust/issues/85894.
Rename a bunch of Rust 2021 related lints:
Lints that are officially renamed because they are already in beta or stable:
* `disjoint_capture_migration` => `rust_2021_incompatible_closure_captures`
* `or_patterns_back_compat` => `rust_2021_incompatible_or_patterns`
* `non_fmt_panic` => `non_fmt_panics`
Lints that are renamed but don't require any back -compat work since they aren't yet in stable:
* `future_prelude_collision` => `rust_2021_prelude_collisions`
* `reserved_prefix` => `rust_2021_token_prefixes`
Lints that have been discussed but that I did not rename:
* ~`non_fmt_panic` and `bare_trait_object`: is making this plural worth the headache we might cause users?~
* `array_into_iter`: I'm unsure of a good name and whether bothering users with a name change is worth it.
r? `@nikomatsakis`
Refactor linker code
This merges `LinkerInfo` into `CrateInfo` as there is no reason to keep them separate. `LinkerInfo::to_linker` is merged into `get_linker` as both have different logic for each linker type and `to_linker` is directly called after `get_linker`. Also contains a couple of small cleanups.
See the individual commits for all changes.
The only change here is a fix for `sys.platform` on Linux. Python 3.3
changed the API to return "linux" instead of "linux2"/"linux3", so this
commit uses `.startswith("python")` to make the code work on Python 3
without breaking Python 2.
Replace per-target ABI denylist with an allowlist
It makes very little sense to maintain denylists of ABIs when, as far as
non-generic ABIs are concerned, targets usually only support a small
subset of the available ABIs.
This has historically been a cause of bugs such as us allowing use of
the platform-specific ABIs on x86 targets – these in turn would cause
LLVM errors or assertions to fire.
In this PR we got rid of the per-target ABI denylists, and instead compute
which ABIs are supported with a simple match based on, mostly, the
`Target::arch` field. Among other things, this makes it impossible to
forget to consider this problem (in either direction) and forces one to
consider what the ABI support looks like when adding an ABI (rarely)
rather than target (often), which should hopefully also reduce the
cognitive load on both contributors as well as reviewers.
Fixes#57182
Sponsored by: standard.ai
---
## Summary for teams
One significant user-facing change after this PR is that there's now a future compat warning when building…
* `stdcall`, `fastcall`, `thiscall` using code with targets other than 32-bit x86 (i386...i686) or *-windows-*;
* `vectorcall` using code when building for targets other than x86 (either 32 or 64 bit) or *-windows-*.
Previously these ABIs have been accepted much more broadly, even for architectures and targets where this made no sense (e.g. on wasm32) and would fall back to the C ABI. In practice this doesn't seem to be used too widely and the [breakages in crater](https://github.com/rust-lang/rust/pull/86231#issuecomment-866300943) that we see are mostly about Windows-specific code that was missing relevant `cfg`s and just happened to successfully `check` on Linux for one reason or another.
The intention is that this warning becomes a hard error after some time.
It makes very little sense to maintain denylists of ABIs when, as far as
non-generic ABIs are concerned, targets usually only support a small
subset of the available ABIs.
This has historically been a cause of bugs such as us allowing use of
the platform-specific ABIs on x86 targets – these in turn would cause
LLVM errors or assertions to fire.
Fixes#57182
Sponsored by: standard.ai
rustdoc: Replace `FakeDefId` with new `ItemId` type
Follow up from #84707
`@Manishearth` [suggested](https://github.com/rust-lang/rust/pull/84707#issuecomment-831994669) that there should be a new `ItemId` type that can distinguish between auto traits, normal ids, and blanket impls instead of using `FakeDefId`s.
This type is introduced by this PR.
There are still some `FIXME`s left, because I was unsure what the best solution for them would be.
Especially the naming in general now is a bit weird right now and needs to be cleaned up. Now there are no "fake" ids so the `is_fake` method on `Item` does not really make sense and maybe the methods on `ItemId` should be renamed too?
Also, we need to represent the new item ids in the JSON backend somehow.
Remove `impl Clean for {Ident, Symbol}`
These were only used once, in a place where it was trivial to replace.
Also, it's unclear what 'clean' would mean for these, so it seems better
to be explicit.
Found while reviewing https://github.com/rust-lang/rust/pull/86841, which makes the same change to `build_macro`, so the two will conflict.
r? `@GuillaumeGomez`
Query-ify global limit attribute handling
Currently, we read various 'global limits' from inner attributes the crate root (`recursion_limit`, `move_size_limit`, `type_length_limit`, `const_eval_limit`). These limits are then stored in `Sessions`, allowing them to be access from a `TyCtxt` without registering a dependency on the crate root attributes.
This PR moves the calculation of these global limits behind queries, so that we properly track dependencies on crate root attributes. During the setup of macro expansion (before we've created a `TyCtxt`), we need to access the recursion limit, which is now done by directly calling into the code shared by the normal query implementations.
