Rollup merge of rust-lang#99213 - davidtwco:translation-migrate-passe…

…s, r=compiler-errors

migrate some of `rustc_passes::check_attr`'s diagnostics and derive improvements

- Implements `IntoDiagnosticArg` for `char` using its `Debug` implementation and introduces a macro for those types which just delegate the implementation to `ToString`.
- Apply the `#[rustc_lint_diagnostics]` attribute to `LintDiagnosticBuilder::build` so that diagnostic migration lints will trigger for it - some diagnostics in `rustc_privacy` need updated after this since the lints apply to that crate.
- Add support for `MultiSpan` with any of the attributes that work on a `Span` in the diagnostic derive (`SessionDiagnostic` + `LintDiagnostic`). Requires that diagnostic logic generated for these attributes are emitted in the by-move block rather than the by-ref block that they would normally have been generated in.
- Both diagnostic and subdiagnostic derives were missing the ability to add warnings to diagnostics - this is made more difficult by the `warn` attribute already existing, so this name being unavailable for the derives to use. `#[warn_]` is used instead, which requires special-casing so that `{span_,}warn` is called instead of `{span_,}warn_`.
- Migrate half of the `rustc_passes::check_attr` diagnostics to using diagnostic derives and being translatable. I got tired after a while. I modified some diagnostic output for consistency while doing this, nothing too crazy.

r? `@compiler-errors`

Cargo.lock

@@ -4239,6 +4239,7 @@ dependencies = [
  "rustc_hir",
  "rustc_index",
  "rustc_lexer",
+ "rustc_macros",
  "rustc_middle",
  "rustc_serialize",
  "rustc_session",

compiler/rustc_error_messages/locales/en-US/passes.ftl

@@ -0,0 +1,151 @@
+-passes-previously-accepted =
+    this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+
+-passes-see-issue =
+    see issue #{$issue} <https://github.com/rust-lang/rust/issues/{$issue}> for more information
+
+passes-outer-crate-level-attr =
+    crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
+
+passes-inner-crate-level-attr =
+    crate-level attribute should be in the root module
+
+passes-ignored-attr-with-macro = `#[{$sym}]` is ignored on struct fields, match arms and macro defs
+    .warn = {-passes-previously-accepted}
+    .note = {-passes-see-issue(issue: "80564")}
+
+passes-ignored-attr = `#[{$sym}]` is ignored on struct fields and match arms
+    .warn = {-passes-previously-accepted}
+    .note = {-passes-see-issue(issue: "80564")}
+
+passes-inline-ignored-function-prototype = `#[inline]` is ignored on function prototypes
+
+passes-inline-ignored-constants = `#[inline]` is ignored on constants
+    .warn = {-passes-previously-accepted}
+    .note = {-passes-see-issue(issue: "65833")}
+
+passes-inline-not-fn-or-closure = attribute should be applied to function or closure
+    .label = not a function or closure
+
+passes-no-coverage-ignored-function-prototype = `#[no_coverage]` is ignored on function prototypes
+
+passes-no-coverage-propagate =
+    `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
+
+passes-no-coverage-fn-defn = `#[no_coverage]` may only be applied to function definitions
+
+passes-no-coverage-not-coverable = `#[no_coverage]` must be applied to coverable code
+    .label = not coverable code
+
+passes-should-be-applied-to-fn = attribute should be applied to a function definition
+    .label = not a function definition
+
+passes-naked-tracked-caller = cannot use `#[track_caller]` with `#[naked]`
+
+passes-should-be-applied-to-struct-enum = attribute should be applied to a struct or enum
+    .label = not a struct or enum
+
+passes-should-be-applied-to-trait = attribute should be applied to a trait
+    .label = not a trait
+
+passes-target-feature-on-statement = {passes-should-be-applied-to-fn}
+    .warn = {-passes-previously-accepted}
+    .label = {passes-should-be-applied-to-fn.label}
+
+passes-should-be-applied-to-static = attribute should be applied to a static
+    .label = not a static
+
+passes-doc-expect-str = doc {$attr_name} attribute expects a string: #[doc({$attr_name} = "a")]
+
+passes-doc-alias-empty = {$attr_str} attribute cannot have empty value
+
+passes-doc-alias-bad-char = {$char_} character isn't allowed in {$attr_str}
+
+passes-doc-alias-start-end = {$attr_str} cannot start or end with ' '
+
+passes-doc-alias-bad-location = {$attr_str} isn't allowed on {$location}
+
+passes-doc-alias-not-an-alias = {$attr_str} is the same as the item's name
+
+passes-doc-alias-duplicated = doc alias is duplicated
+    .label = first defined here
+
+passes-doc-alias-not-string-literal = `#[doc(alias("a"))]` expects string literals
+
+passes-doc-alias-malformed =
+    doc alias attribute expects a string `#[doc(alias = "a")]` or a list of strings `#[doc(alias("a", "b"))]`
+
+passes-doc-keyword-empty-mod = `#[doc(keyword = "...")]` should be used on empty modules
+
+passes-doc-keyword-not-mod = `#[doc(keyword = "...")]` should be used on modules
+
+passes-doc-keyword-invalid-ident = `{$doc_keyword}` is not a valid identifier
+
+passes-doc-tuple-variadic-not-first =
+    `#[doc(tuple_variadic)]` must be used on the first of a set of tuple trait impls with varying arity
+
+passes-doc-keyword-only-impl = `#[doc(keyword = "...")]` should be used on impl blocks
+
+passes-doc-inline-conflict-first = this attribute...
+passes-doc-inline-conflict-second = ...conflicts with this attribute
+passes-doc-inline-conflict = conflicting doc inlining attributes
+    .help = remove one of the conflicting attributes
+
+passes-doc-inline-only-use = this attribute can only be applied to a `use` item
+    .label = only applicable on `use` items
+    .not-a-use-item-label = not a `use` item
+    .note = read <https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#inline-and-no_inline> for more information
+
+passes-doc-attr-not-crate-level =
+    `#![doc({$attr_name} = "...")]` isn't allowed as a crate-level attribute
+
+passes-attr-crate-level = this attribute can only be applied at the crate level
+    .suggestion = to apply to the crate, use an inner attribute
+    .help = to apply to the crate, use an inner attribute
+    .note = read <https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level> for more information
+
+passes-doc-test-unknown = unknown `doc(test)` attribute `{$path}`
+
+passes-doc-test-takes-list = `#[doc(test(...)]` takes a list of attributes
+
+passes-doc-primitive = `doc(primitive)` should never have been stable
+
+passes-doc-test-unknown-any = unknown `doc` attribute `{$path}`
+
+passes-doc-test-unknown-spotlight = unknown `doc` attribute `{$path}`
+    .note = `doc(spotlight)` was renamed to `doc(notable_trait)`
+    .suggestion = use `notable_trait` instead
+    .no-op-note = `doc(spotlight)` is now a no-op
+
+passes-doc-test-unknown-include = unknown `doc` attribute `{$path}`
+    .suggestion = use `doc = include_str!` instead
+
+passes-doc-invalid = invalid `doc` attribute
+
+passes-pass-by-value = `pass_by_value` attribute should be applied to a struct, enum or type alias
+    .label = is not a struct, enum or type alias
+
+passes-allow-incoherent-impl =
+    `rustc_allow_incoherent_impl` attribute should be applied to impl items.
+    .label = the only currently supported targets are inherent methods
+
+passes-has-incoherent-inherent-impl =
+    `rustc_has_incoherent_inherent_impls` attribute should be applied to types or traits.
+    .label = only adts, extern types and traits are supported
+
+passes-must-use-async =
+    `must_use` attribute on `async` functions applies to the anonymous `Future` returned by the function, not the value within
+    .label = this attribute does nothing, the `Future`s returned by async functions are already `must_use`
+
+passes-must-use-no-effect = `#[must_use]` has no effect when applied to {$article} {$target}
+
+passes-must-not-suspend = `must_not_suspend` attribute should be applied to a struct, enum, or trait
+    .label = is not a struct, enum, or trait
+
+passes-cold = {passes-should-be-applied-to-fn}
+    .warn = {-passes-previously-accepted}
+    .label = {passes-should-be-applied-to-fn.label}
+
+passes-link = attribute should be applied to an `extern` block with non-Rust ABI
+    .warn = {-passes-previously-accepted}
+    .label = not an `extern` block

compiler/rustc_error_messages/locales/en-US/privacy.ftl

@@ -10,3 +10,12 @@ privacy-unnamed-item-is-private = {$kind} is private
 privacy-in-public-interface = {$vis_descr} {$kind} `{$descr}` in public interface
     .label = can't leak {$vis_descr} {$kind}
     .visibility-label = `{$descr}` declared as {$vis_descr}
+
+privacy-from-private-dep-in-public-interface =
+    {$kind} `{$descr}` from private dependency '{$krate}' in public interface
+
+private-in-public-lint =
+    {$vis_descr} {$kind} `{$descr}` in public interface (error {$kind ->
+        [trait] E0445
+        *[other] E0446
+    })

compiler/rustc_error_messages/src/lib.rs

@@ -37,6 +37,7 @@ fluent_messages! {
     expand => "../locales/en-US/expand.ftl",
     lint => "../locales/en-US/lint.ftl",
     parser => "../locales/en-US/parser.ftl",
+    passes => "../locales/en-US/passes.ftl",
     privacy => "../locales/en-US/privacy.ftl",
     typeck => "../locales/en-US/typeck.ftl",
 }

compiler/rustc_errors/src/diagnostic.rs

@@ -40,6 +40,35 @@ pub trait IntoDiagnosticArg {
     fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static>;
 }
 
+macro_rules! into_diagnostic_arg_using_display {
+    ($( $ty:ty ),+ $(,)?) => {
+        $(
+            impl IntoDiagnosticArg for $ty {
+                fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
+                    self.to_string().into_diagnostic_arg()
+                }
+            }
+        )+
+    }
+}
+
+into_diagnostic_arg_using_display!(
+    i8,
+    u8,
+    i16,
+    u16,
+    i32,
+    u32,
+    i64,
+    u64,
+    i128,
+    u128,
+    std::num::NonZeroU32,
+    hir::Target,
+    Edition,
+    Ident,
+);
+
 impl IntoDiagnosticArg for bool {
     fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
         if self {
@@ -50,81 +79,9 @@ impl IntoDiagnosticArg for bool {
     }
 }
 
-impl IntoDiagnosticArg for i8 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for u8 {
+impl IntoDiagnosticArg for char {
     fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for i16 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for u16 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for i32 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for u32 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for i64 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for u64 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for i128 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for u128 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for String {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self))
-    }
-}
-
-impl IntoDiagnosticArg for std::num::NonZeroU32 {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
-    }
-}
-
-impl IntoDiagnosticArg for Edition {
-    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        DiagnosticArgValue::Str(Cow::Owned(self.to_string()))
+        DiagnosticArgValue::Str(Cow::Owned(format!("{:?}", self)))
     }
 }
 
@@ -134,15 +91,15 @@ impl IntoDiagnosticArg for Symbol {
     }
 }
 
-impl IntoDiagnosticArg for Ident {
+impl<'a> IntoDiagnosticArg for &'a str {
     fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
         self.to_string().into_diagnostic_arg()
     }
 }
 
-impl<'a> IntoDiagnosticArg for &'a str {
+impl IntoDiagnosticArg for String {
     fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
-        self.to_string().into_diagnostic_arg()
+        DiagnosticArgValue::Str(Cow::Owned(self))
     }
 }
 

compiler/rustc_errors/src/diagnostic_builder.rs

@@ -595,6 +595,7 @@ macro_rules! error_code {
 pub struct LintDiagnosticBuilder<'a, G: EmissionGuarantee>(DiagnosticBuilder<'a, G>);
 
 impl<'a, G: EmissionGuarantee> LintDiagnosticBuilder<'a, G> {
+    #[rustc_lint_diagnostics]
     /// Return the inner `DiagnosticBuilder`, first setting the primary message to `msg`.
     pub fn build(mut self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'a, G> {
         self.0.set_primary_message(msg);

compiler/rustc_macros/src/diagnostics/diagnostic.rs

@@ -59,7 +59,7 @@ impl<'a> SessionDiagnosticDerive<'a> {
                         return DiagnosticDeriveError::ErrorHandled.to_compile_error();
                     }
                     (Some(DiagnosticDeriveKind::Lint), _) => {
-                        span_err(span, "only `#[error(..)]` and `#[warn(..)]` are supported")
+                        span_err(span, "only `#[error(..)]` and `#[warning(..)]` are supported")
                             .help("use the `#[error(...)]` attribute to create a error")
                             .emit();
                         return DiagnosticDeriveError::ErrorHandled.to_compile_error();