Support lints in early attribute parsing

compiler/rustc_errors/src/lib.rs

@@ -61,7 +61,6 @@ pub use rustc_error_messages::{
     fallback_fluent_bundle, fluent_bundle, into_diag_arg_using_display,
 };
 use rustc_hashes::Hash128;
-use rustc_hir_id::HirId;
 pub use rustc_lint_defs::{Applicability, listify, pluralize};
 use rustc_lint_defs::{Lint, LintExpectationId};
 use rustc_macros::{Decodable, Encodable};
@@ -110,13 +109,14 @@ rustc_data_structures::static_assert_size!(PResult<'_, bool>, 24);
 /// Used to avoid depending on `rustc_middle` in `rustc_attr_parsing`.
 /// Always the `TyCtxt`.
 pub trait LintEmitter: Copy {
+    type Id: Copy;
     #[track_caller]
     fn emit_node_span_lint(
         self,
         lint: &'static Lint,
-        hir_id: HirId,
+        hir_id: Self::Id,
         span: impl Into<MultiSpan>,
-        decorator: impl for<'a> LintDiagnostic<'a, ()>,
+        decorator: impl for<'a> LintDiagnostic<'a, ()> + DynSend + 'static,
     );
 }