Rollup of 10 pull requests #76456
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Rollup of 10 pull requests #76456
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Co-authored-by: Oliver Scherer <github35764891676564198441@oli-obk.de>
Improve contrast of foreground line number.
CDB doesn't care that you're using static_cast between unrelated types. VS(C) does. These should've been reinterpret_cast or C casts. Cast is from e.g. `u8*` to `tuple<$T1, $T2>*`
This is generally a good idea, and will help with being able to build bootstrap without Python over time as it means we can "just" build with cargo +beta build rather than needing the user to set environment variables. This is a minor step, but a necessary one on that road.
…acement, r=matthewjasper Validate built-in attribute placement Closes rust-lang#54584, closes rust-lang#47725, closes rust-lang#54044. I've changed silently ignoring some incorrectly placed attributes to errors. I'm not sure what the policy is since this can theoretically break code (should they be warnings instead? does it warrant a crater run?).
…r=oli-obk Add derive macro for specifying diagnostics using attributes. Introduces `#[derive(SessionDiagnostic)]`, a derive macro for specifying structs that can be converted to Diagnostics using directions given by attributes on the struct and its fields. Currently, the following attributes have been implemented: - `#[code = "..."]` -- this sets the Diagnostic's error code, and must be provided on the struct iself (ie, not on a field). Equivalent to calling `code`. - `#[message = "..."]` -- this sets the Diagnostic's primary error message. - `#[label = "..."]` -- this must be applied to fields of type `Span`, and is equivalent to `span_label` - `#[suggestion(..)]` -- this allows a suggestion message to be supplied. This attribute must be applied to a field of type `Span` or `(Span, Applicability)`, and is equivalent to calling `span_suggestion`. Valid arguments are: - `message = "..."` -- this sets the suggestion message. - (Optional) `code = "..."` -- this suggests code for the suggestion. Defaults to empty. `suggestion`also comes with other variants: `#[suggestion_short(..)]`, `#[suggestion_hidden(..)]` and `#[suggestion_verbose(..)]` which all take the same keys. Within the strings passed to each attribute, fields can be referenced without needing to be passed explicitly into the format string -- eg, `#[error = "{ident} already declared"] ` will set the error message to `format!("{} already declared", &self.ident)`. Any fields on the struct can be referenced in this way. Additionally, for any of these attributes, Option fields can be used to only optionally apply the decoration -- for example: ```rust #[derive(SessionDiagnostic)] #[code = "E0123"] struct SomeKindOfError { ... #[suggestion(message = "informative error message")] opt_sugg: Option<(Span, Applicability)> ... } ``` will not emit a suggestion if `opt_sugg` is `None`. We plan on iterating on this macro further; this PR is a start. Closes rust-lang#61132. r? @oli-obk Do not promote &mut of a non-ZST ever Since ~pre-1.0~ 1.36, we have accepted code like this: ```rust static mut TEST: &'static mut [i32] = { let x = &mut [1,2,3]; x }; ``` I tracked it back to rust-lang#21744, but unfortunately could not find any discussion or RFC that would explain why we thought this was a good idea. And it's not, it breaks all sorts of things -- see rust-lang#75556. To fix rust-lang#75556, we have to stop promoting non-ZST mutable references no matter the context, which is what this PR does. It's a breaking change. Notice that this still works, since it does not rely on promotion: ```rust static mut TEST: &'static mut [i32] = &mut [0,1,2]; ``` Cc @rust-lang/wg-const-eval Improve ayu doc source line number contrast Improve contrast of foreground line number. Before  After  r? @Cldfire I think we should add the line for light and dark theme too, it looks better and clearer that way.
…crum rustbuild: Remove `Mode::Codegen` It's no longer used.
…, r=petrochenkov Fix HashMap visualizers in Visual Studio (Code) CDB (as used in unit tests) doesn't care that we're using static_cast between unrelated types (`u8*` to `tuple<$T1, $T2>*`). Visual Studio & Visual Studio Code care. These should've been reinterpret_cast or C casts. Credit to @petrochenkov per rust-lang#76352 for helping catch this. ### Testing ```cmd x.py test --stage 1 src/tools/tidy x.py test --stage 1 --build x86_64-pc-windows-msvc src\test\debuginfo ```
…mplate, r=jonas-schievink Fix typo in tracking issue template
Update linker-plugin-lto.md to contain up to rust 1.46 Hi, this is the same as rust-lang#72290, if anyone has suggestions on how to automate this please say :) otherwise, you can check the versions I've added via: ```sh $ rustup install 1.44.0 $ rustc +1.44.0 -Vv rustc 1.44.0 (49cae55 2020-06-01) binary: rustc commit-hash: 49cae55 commit-date: 2020-06-01 host: x86_64-unknown-linux-gnu release: 1.44.0 LLVM version: 9.0 $ rustup install 1.45.0 $ rustc +1.45.0 -Vv rustc 1.45.0 (5c1f21c 2020-07-13) binary: rustc commit-hash: 5c1f21c commit-date: 2020-07-13 host: x86_64-unknown-linux-gnu release: 1.45.0 LLVM version: 10.0 $ rustup install 1.46.0 $ rustc +stable -Vv rustc 1.46.0 (04488af 2020-08-24) binary: rustc commit-hash: 04488af commit-date: 2020-08-24 host: x86_64-unknown-linux-gnu release: 1.46.0 LLVM version: 10.0 ```
Fix documentation for TyCtxt::all_impls `TyCtxt::all_impls` documentation was wrong about the return type.
…=jyn514 Make bootstrap build on beta This is generally a good idea, and will help with being able to build bootstrap without Python over time as it means we can "just" build with cargo +beta build rather than needing the user to set environment variables. This is a minor step, but a necessary one on that road. r? @jyn514
| @bors r+ rollup=never p=5 |
| 📌 Commit 4ab3677 has been approved by |
bors added the S-waiting-on-bors | ⌛ Testing commit 4ab3677 with merge ab506a2f2cdff04d4b93a15474191484ed60a6f9... |
| 💔 Test failed - checks-actions |
bors added S-waiting-on-review 
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Successful merges:
Mode::Codegen#76379 (rustbuild: RemoveMode::Codegen)Failed merges:
r? @ghost