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Make SelectionCache and EvaluationCache thread-safe
Split out from https://github.com/rust-lang/rust/pull/49558
r? @nikomatsakis
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Refactor auto trait handling in librustdoc to be accessible from librustc.
These commits transfer some of the functionality introduced in https://github.com/rust-lang/rust/pull/47833 to librustc with the intention of making the tools to work with auto traits accessible to third-party code, for example [rust-semverver](https://github.com/rust-lang-nursery/rust-semverver).
Some rough edges remain, and I'm certain some of the FIXMEs introduced will need some discussion, most notably the fairly ugly overall approach to pull out the core logic into librustc, which was previously fairly tightly coupled with various bits and bobs from librustdoc.
cc @Aaron1011
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Cleanup a `use` in a raw_vec test
`allocator` is deprecated in favor of `alloc`, and `Alloc` is already imported
through `super::*`.
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Add some explanations for #[must_use]
`#[must_use]` can be given a string argument which is shown whilst warning for things.
We should add a string argument to most of the user-exposed ones.
I added these for everything but the operators, mostly because I'm not sure what to write there or if we need anything there.
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Added regression function match value test
closes #44333
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Remove some transmutes
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Make `String::new()` const
Following the steps of https://github.com/rust-lang/rust/pull/50233 , make `String::new()` a `const fn`.
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turn `ManuallyDrop::new` into a constant function
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Mention Result<!, E> in never docs.
Fixes #48096.
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Add more logarithm constants
Right now, we have `ln(2)` and `ln(10)`, but only `log2(e)` and `log10(e)`. This also adds `log2(10)` and `log10(2)` for consistency.
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Optimize string handling in lit_token().
In the common case, the string value in a string literal Token is the
same as the string value in a string literal LitKind. (The exception is
when escapes or \r are involved.) This patch takes advantage of that to
avoid calling str_lit() and re-interning the string in that case. This
speeds up incremental builds for a few of the rustc-benchmarks, the best
by 3%.
Benchmarks that got a speedup of 1% or more:
```
coercions
avg: -1.1% min: -3.5% max: 0.4%
regex-check
avg: -1.2% min: -1.5% max: -0.6%
futures-check
avg: -0.9% min: -1.4% max: -0.3%
futures
avg: -0.8% min: -1.3% max: -0.3%
futures-opt
avg: -0.7% min: -1.2% max: -0.1%
regex
avg: -0.5% min: -1.2% max: -0.1%
regex-opt
avg: -0.5% min: -1.1% max: -0.1%
hyper-check
avg: -0.7% min: -1.0% max: -0.3%
```
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Update the Cargo submodule
Hopefully brining in a few fixes to Cargo regressions!
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In the common case, the string value in a string literal Token is the
same as the string value in a string literal LitKind. (The exception is
when escapes or \r are involved.) This patch takes advantage of that to
avoid calling str_lit() and re-interning the string in that case. This
speeds up incremental builds for a few of the rustc-benchmarks, the best
by 3%.
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Fix thinning pointers to extern types in miri
r? @kennytm as an alternative to disabling the miri build
fixes #50495
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Hopefully brining in a few fixes to Cargo regressions as well as some new
stdsimd functions!
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Rename Pin to PinMut, and some more breaking changes
As discussed at [1] §3 and [2] and [3], a formal look at pinning requires considering a distinguished "shared pinned" mode/typestate. Given that, it seems desirable to at least eventually actually expose that typestate as a reference type. This renames Pin to PinMut, freeing the name Pin in case we want to use it for a shared pinned reference later on.
[1] https://www.ralfj.de/blog/2018/04/10/safe-intrusive-collections-with-pinning.html
[2] https://github.com/rust-lang/rfcs/pull/2349#issuecomment-379250361
[3] https://github.com/rust-lang/rust/issues/49150#issuecomment-380488275
Cc @withoutboats
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save-analysis: emit correct docs for methods
cc https://github.com/rust-lang-nursery/rls/issues/446
r? @eddyb
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Update rls with compiling clippy
Updates rls to use a working clippy version. This pr can be closed if the latest clippy release is broken again.
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`allocator` is deprecated in favor of `alloc`, and `Alloc` is already imported
through `super::*`.
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lint: deny incoherent_fundamental_impls by default
Warn the ecosystem of the pending intent-to-disallow in #49799.
There are 4 ICEs on my machine, look unrelated (having happened before in https://github.com/rust-lang/rust/issues/49146#issuecomment-384473523)
```rust
thread 'main' panicked at 'assertion failed: position <= slice.len()', libserialize/leb128.rs:97:1
```
```
[run-pass] run-pass/allocator/xcrate-use2.rs
[run-pass] run-pass/issue-12133-3.rs
[run-pass] run-pass/issue-32518.rs
[run-pass] run-pass/trait-default-method-xc-2.rs
```
r? @nikomatsakis
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idiom lints for removing `extern crate`
Based off of https://github.com/rust-lang/rust/pull/49789
This contains two lints:
- One that suggests replacing pub extern crates with pub use, and removing non-pub extern crates entirely
- One that suggests rewriting `use modulename::...::cratename::foo` as `cratename::foo`
The latter is a bit tricky to emit suggestions for; for one this involves splicing spans (never a good idea), and it also won't be able to correctly
handle `use module::{cratename, foo}` and use-trees. I'm not sure how to proceed here. Currently it doesn't suggest anything at all.
Perhaps we can go the other way and suggest removal of all extern crates _except_ those used through modules (stash node ids somewhere) and suggest replacing those with `<visibility> use`?
r? @nikomatsakis
fixes https://github.com/rust-lang/rust/issues/48719
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Prevent infinite recursion of modules
Fixes #50196.
r? @QuietMisdreavus
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Various edition preview fixes
Implement a bunch of things discussed in the meeting.
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Fix rls-clippy feature compile
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Use ManuallyDrop instead of Option in BinaryHeap Hole implementation
The Option is always Some until drop, where it becomes None. Make this more explicit and avoid unwraps by using ManuallyDrop.
This change should be performance-neutral as LLVM already optimizes the unwraps away in the inlined code. However I've seen this pattern copied from here to other crates where it is not optimized away, so I think it would be good to change it.
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Suggested by @dylanede at <https://github.com/rust-lang/rust/issues/49150#issuecomment-381071442>.
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As discussed at [1] §3 and [2] and [3], a formal look at pinning requires considering a
distinguished "shared pinned" mode/typestate. Given that, it seems desirable to
at least eventually actually expose that typestate as a reference type. This
renames Pin to PinMut, freeing the name Pin in case we want to use it for a
shared pinned reference later on.
[1] https://www.ralfj.de/blog/2018/04/10/safe-intrusive-collections-with-pinning.html
[2] https://github.com/rust-lang/rfcs/pull/2349#issuecomment-379250361
[3] https://github.com/rust-lang/rust/issues/49150#issuecomment-380488275
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Add some groundwork for cross-language LTO.
Implements part of #49879:
- Adds a `-Z cross-lang-lto` flag to rustc
- Makes sure that bitcode is embedded in object files if the flag is set.
This should already allow for using cross language LTO for staticlibs (where one has to invoke the linker manually anyway). However, `rustc` will not try to enable LTO for its own linker invocations yet.
r? @alexcrichton
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in which the must-use additional messaging is tucked into a note
_I_ think it looks better this way! What do _you_ think??
r? @estebank
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Also, a comment is edited to reflect that spaces around the equals-sign in
attributes is the standard (q.v. rust-lang-nursery/fmt-rfcs@bea80532e7).
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Ping infra team on all tool bustage
r? @kennytm
cc @rust-lang/core as discussed at today's meeting
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cc https://github.com/rust-lang-nursery/rls/issues/446
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Pass a test directory to rustfmt
Another attempt to fix the rustfmt tests. `RUSTFMT_TEST_DIR` is consumed by Rustfmt in the latext commit (thus the Rustfmt update) because we need a place to create temp files that won't be read-only.
r? @alexcrichton
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Issue 49938: Reference tagged unions discr(iminant) as tag
Here the changes reference the Tagged type _discriminant_ as _tag_ instead. This is the correct terminology when referencing how tagged unions are represented in memory.
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Fix ICE in assertion macro
Fixes #50471. Needs beta-backport (stable-to-beta/nightly regression).
* `panic` with single argument does not need escaping `{` and `}`
* Instead of unescaping `\u{...}` manually, just use `escape_debug` in pprust
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