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LorrensP-2158466:refactor-resolve-resolution-bindings, r=petrochenkov
Refactor resolve resolution bindings
This pr does the work asked in https://github.com/rust-lang/rust/pull/142547#issuecomment-3001339385. This part:
> move the `(non)_glob_binding` change
r? ````@petrochenkov````
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and glob_binding
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local_macro_map.
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Now that it only contains indexes, and no other information, a bitset
provides a more compact and simpler representation.
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The MBE parser checks rules at initial parse time to see if their RHS
has `compile_error!` in it, and returns a list of rule indexes and LHS
spans that don't map to `compile_error!`, for use in unused macro rule
checking.
Instead, have the unused macro rule reporting ask the macro for the rule
to report, and let the macro check at that time. That avoids checking
rules unless they're unused.
In the process, refactor the data structure used to store macro rules,
to group the LHS and RHS (and LHS span) of each rule together, and
refactor the unused rule tracking to only track rule indexes.
This ends up being a net simplification, and reduction in code size.
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Avoid depending on forever-red DepNode when encoding metadata.
Split from https://github.com/rust-lang/rust/pull/114669 for perf
r? `@petrochenkov`
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Look at proc-macro attributes when encountering unknown attribute
```
error: cannot find attribute `sede` in this scope
--> $DIR/missing-derive-2.rs:22:7
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LL | #[sede(untagged)]
| ^^^^
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help: the derive macros `Deserialize` and `Serialize` accept the similarly named `serde` attribute
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LL | #[serde(untagged)]
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error: cannot find attribute `serde` in this scope
--> $DIR/missing-derive-2.rs:16:7
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LL | #[serde(untagged)]
| ^^^^^
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note: `serde` is imported here, but it is a crate, not an attribute
--> $DIR/missing-derive-2.rs:5:1
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LL | extern crate serde;
| ^^^^^^^^^^^^^^^^^^^
help: `serde` is an attribute that can be used by the derive macros `Serialize` and `Deserialize`, you might be missing a `derive` attribute
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LL + #[derive(Serialize, Deserialize)]
LL | enum B {
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```
Partially address #47608. This PR doesn't find [macros that haven't yet been imported by name](https://github.com/rust-lang/rust/pull/109278/commits/af945cb86e03b44a4b6dc4d54ec1424b00a2349e).
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```
error: cannot find attribute `empty_helper` in this scope
--> $DIR/derive-helper-legacy-limits.rs:17:3
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LL | #[empty_helper]
| ^^^^^^^^^^^^
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help: `empty_helper` is an attribute that can be used by the derive macro `Empty`, you might be missing a `derive` attribute
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LL + #[derive(Empty)]
LL | struct S2;
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```
Look at proc-macro attributes when encountering unknown attribute
```
error: cannot find attribute `sede` in this scope
--> src/main.rs:18:7
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18 | #[sede(untagged)]
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help: the derive macros `Serialize` and `Deserialize` accept the similarly named `serde` attribute
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18 | #[serde(untagged)]
| ~~~~~
error: cannot find attribute `serde` in this scope
--> src/main.rs:12:7
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12 | #[serde(untagged)]
| ^^^^^
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= note: `serde` is in scope, but it is a crate, not an attribute
help: `serde` is an attribute that can be used by the derive macros `Serialize` and `Deserialize`, you might be missing a `derive` attribute
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10 | #[derive(Serialize, Deserialize)]
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```
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prelude changes
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All uses have been removed. And it's nonsensical: an identifier by
definition has at least one char.
The commits adds an is-non-empty assertion to `Ident::new` to enforce
this, and converts some `Ident` constructions to use `Ident::new`.
Adding the assertion requires making `Ident::new` and
`Ident::with_dummy_span` non-const, which is no great loss.
The commit amends a couple of places that do path splitting to ensure no
empty identifiers are created.
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ismailarilik:handle-potential-query-instability-lint-for-rustc-middle, r=oli-obk
Handle `rustc_middle` cases of `rustc::potential_query_instability` lint
This PR removes `#![allow(rustc::potential_query_instability)]` line from [`compiler/rustc_middle/src/lib.rs`](https://github.com/rust-lang/rust/blob/master/compiler/rustc_middle/src/lib.rs#L29) and converts `FxHash{Map,Set}` types into `FxIndex{Map,Set}` to suppress lint errors.
A somewhat tracking issue: https://github.com/rust-lang/rust/issues/84447
r? `@compiler-errors`
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Remove global `next_disambiguator` state and handle it with a `DisambiguatorState` type
This removes `Definitions.next_disambiguator` as it doesn't guarantee deterministic def paths when `create_def` is called in parallel. Instead a new `DisambiguatorState` type is passed as a mutable reference to `create_def` to help create unique def paths. `create_def` calls with distinct `DisambiguatorState` instances must ensure that that the def paths are unique without its help.
Anon associated types did rely on this global state for uniqueness and are changed to use (method they're defined in + their position in the method return type) as the `DefPathData` to ensure uniqueness. This also means that the method they're defined in appears in error messages, which is nicer.
`DefPathData::NestedStatic` is added to use for nested data inside statics instead of reusing `DefPathData::AnonConst` to avoid conflicts with those.
cc `@oli-obk`
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This commit does the following.
- Changes it from `Lrc<Box<dyn ToAttrTokenStream>>` to
`Lrc<LazyAttrTokenStreamInner>`.
- Reworks `LazyAttrTokenStreamImpl` as `LazyAttrTokenStreamInner`, which
is a two-variant enum.
- Removes the `ToAttrTokenStream` trait and the two impls of it.
The recursion limit must be increased in some crates otherwise rustdoc
aborts.
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`DisambiguatorState` type
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hygiene: Rename semi-transparent to semi-opaque
"Semi-transparent" is just too damn long for a name, especially when used multiple times on a single line, it bothered me when working on #139083.
An optimist sees a macro as semi-opaque, a pessimist sees it as semi-transparent.
Or is it the other way round?
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Tweak `DefPathData`
Some improvements in and around `DefPathData`, following on from #137977.
r? `@spastorino`
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No need to convert the `DefKind` to `DefPathData`, they're very similar
types.
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It bugs me when variables of type `Ident` are called `name`. It leads to
silly things like `name.name`. `Ident` variables should be called
`ident`, and `name` should be used for variables of type `Symbol`.
This commit improves things by by doing `s/name/ident/` on a bunch of
`Ident` variables. Not all of them, but a decent chunk.
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Add unstable `--print=crate-root-lint-levels`
This PR implements `--print=crate-root-lint-levels` from MCP 833 https://github.com/rust-lang/compiler-team/issues/833.
Tracking issue: https://github.com/rust-lang/rust/issues/139180
Best reviewed commit by commit.
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The former is just too long, see the examples in `hygiene.rs`
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Visitors track whether an assoc item is in a trait impl or an inherent impl
`AssocCtxt::Impl` now contains an `of_trait` field. This allows ast lowering and nameres to not have to track whether we're in a trait impl or an inherent impl.
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Reduce `kw::Empty` usage, part 3
Remove some more `kw::Empty` uses, in support of #137978.
r? `@davidtwco`
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This way, `None` represents "crate root without a name" instead of
`kw::Empty`. This changes makes it impossible to forget to handle the
exceptional case.
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This removes E0773 "A builtin-macro was defined more than once."
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r=onur-ozkan,jieyouxu
Use `RUSTC_LINT_FLAGS` more
An alternative to the failed #138084.
Fixes #138106.
r? `````@jieyouxu`````
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It's no longer necessary now that `-Wunreachable_pub` is being passed.
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Revert <https://github.com/rust-lang/rust/pull/138084> to buy time to
consider options that avoids breaking downstream usages of cargo on
distributed `rustc-src` artifacts, where such cargo invocations fail due
to inability to inherit `lints` from workspace root manifest's
`workspace.lints` (this is only valid for the source rust-lang/rust
workspace, but not really the distributed `rustc-src` artifacts).
This breakage was reported in
<https://github.com/rust-lang/rust/issues/138304>.
This reverts commit 48caf81484b50dca5a5cebb614899a3df81ca898, reversing
changes made to c6662879b27f5161e95f39395e3c9513a7b97028.
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Use workspace lints for crates in `compiler/`
This is nicer and hopefully less error prone than specifying lints via bootstrap.
r? ``@jieyouxu``
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(Except for `rustc_codegen_cranelift`.)
It's no longer necessary now that `unreachable_pub` is in the workspace
lints.
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