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Also make it *only* usable on nightly
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compiler: rename BareFn to FnPtr
At some point "BareFn" was the chosen name for a "bare" function, without the niceties of `~fn`, `&fn`, or a few other ways of writing a function type. However, at some point the syntax for a "bare function" and any other function diverged even more. We started calling them what they are: function pointers, denoted by their own syntax.
However, we never changed the *internal* name for these, as this divergence was very gradual. Personally, I have repeatedly searched for "FnPtr" and gotten confused until I find the name is BareFn, only to forget this until the next time, since I don't routinely interact with the higher-level AST and HIR. But even tools that interact with these internal types only touch on them in a few places, making a migration easy enough. Let's use a more intuitive and obvious name, as this 12+ year old name has little to do with current Rust.
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Fix some comments and related types and locals where it is obvious, e.g.
- bare_fn -> fn_ptr
- LifetimeBinderKind::BareFnType -> LifetimeBinderKind::FnPtrType
Co-authored-by: León Orell Valerian Liehr <me@fmease.dev>
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Signed-off-by: Jonathan Brouwer <jonathantbrouwer@gmail.com>
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lint on duplicates during attribute parsing
To do this we stuff them in the diagnostic context to be emitted after
hir is constructed
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fix(#141141): When expanding `PartialEq`, check equality of scalar types first.
Fixes rust-lang/rust#141141.
Now, `cs_eq` function of `partial_eq.rs` compares [scalar types](https://doc.rust-lang.org/rust-by-example/primitives.html#scalar-types) first.
- Add `is_scalar` field to `FieldInfo`.
- Add `is_scalar` method to `TyKind`.
- Pass `FieldInfo` via `CsFold::Combine` and refactor code relying on it.
- Implement `TryFrom<&str>` and `TryFrom<Symbol>` for FloatTy.
- Implement `TryFrom<&str>` and `TryFrom<Symbol>` for IntTy.
- Implement `TryFrom<&str>` and `TryFrom<Symbol>` for UintTy.
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order of declaration.
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So they match the order of the parts in the source code, e.g.:
```
struct Foo<T, U> { t: T, u: U }
<-><----> <------------>
/ | \
ident generics variant_data
```
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I'm removing empty identifiers everywhere, because in practice they
always mean "no identifier" rather than "empty identifier". (An empty
identifier is impossible.) It's better to use `Option` to mean "no
identifier" because you then can't forget about the "no identifier"
possibility.
Some specifics:
- When testing an attribute for a single name, the commit uses the
`has_name` method.
- When testing an attribute for multiple names, the commit uses the new
`has_any_name` method.
- When using `match` on an attribute, the match arms now have `Some` on
them.
In the tests, we now avoid printing empty identifiers by not printing
the identifier in the `error:` line at all, instead letting the carets
point out the problem.
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`ast::Item` has an `ident` field.
- It's always non-empty for these item kinds: `ExternCrate`, `Static`,
`Const`, `Fn`, `Mod`, `TyAlias`, `Enum`, `Struct`, `Union`,
`Trait`, `TraitAlias`, `MacroDef`, `Delegation`.
- It's always empty for these item kinds: `Use`, `ForeignMod`,
`GlobalAsm`, `Impl`, `MacCall`, `DelegationMac`.
There is a similar story for `AssocItemKind` and `ForeignItemKind`.
Some sites that handle items check for an empty ident, some don't. This
is a very C-like way of doing things, but this is Rust, we have sum
types, we can do this properly and never forget to check for the
exceptional case and never YOLO possibly empty identifiers (or possibly
dummy spans) around and hope that things will work out.
The commit is large but it's mostly obvious plumbing work. Some notable
things.
- `ast::Item` got 8 bytes bigger. This could be avoided by boxing the
fields within some of the `ast::ItemKind` variants (specifically:
`Struct`, `Union`, `Enum`). I might do that in a follow-up; this
commit is big enough already.
- For the visitors: `FnKind` no longer needs an `ident` field because
the `Fn` within how has one.
- In the parser, the `ItemInfo` typedef is no longer needed. It was used
in various places to return an `Ident` alongside an `ItemKind`, but
now the `Ident` (if present) is within the `ItemKind`.
- In a few places I renamed identifier variables called `name` (or
`foo_name`) as `ident` (or `foo_ident`), to better match the type, and
because `name` is normally used for `Symbol`s. It's confusing to see
something like `foo_name.name`.
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note: compiler compiles but librustdoc and clippy don't
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lang items
includes post-developed commit: do not suggest internal-only keywords as corrections to parse failures.
includes post-developed commit: removed tabs that creeped in into rustfmt tool source code.
includes post-developed commit, placating rustfmt self dogfooding.
includes post-developed commit: add backquotes to prevent markdown checking from trying to treat an attr as a markdown hyperlink/
includes post-developed commit: fix lowering to keep contracts from being erroneously inherited by nested bodies (like closures).
Rebase Conflicts:
- compiler/rustc_parse/src/parser/diagnostics.rs
- compiler/rustc_parse/src/parser/item.rs
- compiler/rustc_span/src/hygiene.rs
Remove contracts keywords from diagnostic messages
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`rustc_span::symbol` defines some things that are re-exported from
`rustc_span`, such as `Symbol` and `sym`. But it doesn't re-export some
closely related things such as `Ident` and `kw`. So you can do `use
rustc_span::{Symbol, sym}` but you have to do `use
rustc_span::symbol::{Ident, kw}`, which is inconsistent for no good
reason.
This commit re-exports `Ident`, `kw`, and `MacroRulesNormalizedIdent`,
and changes many `rustc_span::symbol::` qualifiers in `compiler/` to
`rustc_span::`. This is a 200+ net line of code reduction, mostly
because many files with two `use rustc_span` items can be reduced to
one.
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Initial implementation of `#[feature(default_field_values]`, proposed in https://github.com/rust-lang/rfcs/pull/3681.
Support default fields in enum struct variant
Allow default values in an enum struct variant definition:
```rust
pub enum Bar {
Foo {
bar: S = S,
baz: i32 = 42 + 3,
}
}
```
Allow using `..` without a base on an enum struct variant
```rust
Bar::Foo { .. }
```
`#[derive(Default)]` doesn't account for these as it is still gating `#[default]` only being allowed on unit variants.
Support `#[derive(Default)]` on enum struct variants with all defaulted fields
```rust
pub enum Bar {
#[default]
Foo {
bar: S = S,
baz: i32 = 42 + 3,
}
}
```
Check for missing fields in typeck instead of mir_build.
Expand test with `const` param case (needs `generic_const_exprs` enabled).
Properly instantiate MIR const
The following works:
```rust
struct S<A> {
a: Vec<A> = Vec::new(),
}
S::<i32> { .. }
```
Add lint for default fields that will always fail const-eval
We *allow* this to happen for API writers that might want to rely on users'
getting a compile error when using the default field, different to the error
that they would get when the field isn't default. We could change this to
*always* error instead of being a lint, if we wanted.
This will *not* catch errors for partially evaluated consts, like when the
expression relies on a const parameter.
Suggestions when encountering `Foo { .. }` without `#[feature(default_field_values)]`:
- Suggest adding a base expression if there are missing fields.
- Suggest enabling the feature if all the missing fields have optional values.
- Suggest removing `..` if there are no missing fields.
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add a test
add github issue link to description of the test
replace new ThinVec with clear()
Co-authored-by: León Orell Valerian Liehr <me@fmease.dev>
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r=nnethercote
built-in derive: remove BYTE_SLICE_IN_PACKED_STRUCT_WITH_DERIVE hack and lint
Fixes https://github.com/rust-lang/rust/issues/107457 by turning the lint into a hard error. The lint has been shown in future breakage reports since Rust 1.69 (released in April 2023).
Let's see (via crater) if enough time has passed since https://github.com/rust-lang/rust/pull/104429, and https://github.com/unicode-org/icu4x/pull/2834 has propagated far enough to let us make this a hard error.
Cc ``@nnethercote`` ``@Manishearth``
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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When given
```rust
trait SomeTrait {
type SomeType<'a>;
}
struct Foo<T: SomeTrait> {
x: for<'a> fn(T::SomeType<'a>)
}
```
expand to
```rust
impl<T: ::core::clone::Clone + SomeTrait> ::core::clone::Clone for Foo<T>
where for<'a> T::SomeType<'a>: ::core::clone::Clone {
#[inline]
fn clone(&self) -> Foo<T> {
Foo { x: ::core::clone::Clone::clone(&self.x) }
}
}
```
instead of the previous invalid
```
impl<T: ::core::clone::Clone + SomeTrait> ::core::clone::Clone for Foo<T>
where T::SomeType<'a>: ::core::clone::Clone {
#[inline]
fn clone(&self) -> Foo<T> {
Foo { x: ::core::clone::Clone::clone(&self.x) }
}
}
```
Fix #122622.
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Translation of the lint message happens when the actual diagnostic is
created, not when the lint is buffered. Generating the message from
BuiltinLintDiag ensures that all required data to construct the message
is preserved in the LintBuffer, eventually allowing the messages to be
moved to fluent.
Remove the `msg` field from BufferedEarlyLint, it is either generated
from the data in the BuiltinLintDiag or stored inside
BuiltinLintDiag::Normal.
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In some cases `DUMMY_SP` is already imported. In other cases this commit
adds the necessary import, in files where `DUMMY_SP` is used more than
once.
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warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\clone.rs:160:9
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160 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\cmp\partial_ord.rs:72:9
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72 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\cmp\partial_eq.rs:19:18
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19 | fn cs_eq(cx: &mut ExtCtxt<'_>, span: Span, substr: &Substructure<'_>) -> BlockOrExpr {
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\cmp\ord.rs:42:19
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42 | pub fn cs_cmp(cx: &mut ExtCtxt<'_>, span: Span, substr: &Substructure<'_>) -> BlockOrExpr {
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:917:13
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917 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1406:13
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1406 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1157:13
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1157 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1103:13
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1103 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1080:13
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1080 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:859:13
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859 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:805:13
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805 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:467:13
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467 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:457:13
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457 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
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warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\mod.rs:120:9
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120 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1573:13
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1573 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1556:13
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1556 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1463:13
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1463 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:1433:36
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1433 | fn summarise_struct(&self, cx: &mut ExtCtxt<'_>, struct_def: &VariantData) -> StaticFields {
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:953:13
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953 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:932:13
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932 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:580:13
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580 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\generic\mod.rs:989:13
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989 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\clone.rs:97:9
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97 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\cmp\eq.rs:52:9
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52 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\hash.rs:50:9
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50 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\encodable.rs:150:9
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150 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\default.rs:176:9
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176 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\default.rs:106:9
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106 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\default.rs:57:9
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57 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\default.rs:84:9
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84 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\debug.rs:212:9
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212 | cx: &mut ExtCtxt<'_>,
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
warning: this argument is a mutable reference, but not used mutably
--> compiler\rustc_builtin_macros\src\deriving\debug.rs:48:26
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48 | fn show_substructure(cx: &mut ExtCtxt<'_>, span: Span, substr: &Substructure<'_>) -> BlockOrExpr {
| ^^^^^^^^^^^^^^^^ help: consider changing to: `&ExtCtxt<'_>`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
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The dead_code lint was previously eroneously missing those.
Since this lint bug has been fixed, the unused fields need
to be removed.
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Not the dropping of the trailing `s` -- this type describes a single
diagnostic and its name should be singular.
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Existing names for values of this type are `sess`, `parse_sess`,
`parse_session`, and `ps`. `sess` is particularly annoying because
that's also used for `Session` values, which are often co-located, and
it can be difficult to know which type a value named `sess` refers to.
(That annoyance is the main motivation for this change.) `psess` is nice
and short, which is good for a name used this much.
The commit also renames some `parse_sess_created` values as
`psess_created`.
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