Move DuplicateEiiImpls to rustc_middle

Author: qaijuang

compiler/rustc_middle/src/error.rs

@@ -160,3 +160,32 @@ pub(crate) struct IncrementCompilation {
     pub run_cmd: String,
     pub dep_node: String,
 }
+
+#[derive(Diagnostic)]
+#[diag("multiple implementations of `#[{$name}]`")]
+pub struct DuplicateEiiImpls {
+    pub name: Symbol,
+
+    #[primary_span]
+    #[label("first implemented here in crate `{$first_crate}`")]
+    pub first_span: Span,
+    pub first_crate: Symbol,
+
+    #[label("also implemented here in crate `{$second_crate}`")]
+    pub second_span: Span,
+    pub second_crate: Symbol,
+
+    #[note("in addition to these two, { $num_additional_crates ->
+        [one] another implementation was found in crate {$additional_crate_names}
+        *[other] more implementations were also found in the following crates: {$additional_crate_names}
+    }")]
+    pub additional_crates: Option<()>,
+
+    pub num_additional_crates: usize,
+    pub additional_crate_names: String,
+
+    #[help(
+        "an \"externally implementable item\" can only have a single implementation in the final artifact. When multiple implementations are found, also in different crates, they conflict"
+    )]
+    pub help: (),
+}

compiler/rustc_passes/src/eii.rs

@@ -6,10 +6,11 @@ use std::iter;
 use rustc_data_structures::fx::FxIndexMap;
 use rustc_hir::attrs::{EiiDecl, EiiImpl};
 use rustc_hir::def_id::{CrateNum, DefId, LOCAL_CRATE};
+use rustc_middle::error::DuplicateEiiImpls;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::config::CrateType;
 
-use crate::errors::{DuplicateEiiImpls, EiiWithoutImpl};
+use crate::errors::EiiWithoutImpl;
 
 #[derive(Clone, Copy, Debug)]
 enum CheckingMode {

compiler/rustc_passes/src/errors.rs

@@ -1224,35 +1224,6 @@ pub(crate) struct EiiWithoutImpl {
     pub help: (),
 }
 
-#[derive(Diagnostic)]
-#[diag("multiple implementations of `#[{$name}]`")]
-pub(crate) struct DuplicateEiiImpls {
-    pub name: Symbol,
-
-    #[primary_span]
-    #[label("first implemented here in crate `{$first_crate}`")]
-    pub first_span: Span,
-    pub first_crate: Symbol,
-
-    #[label("also implemented here in crate `{$second_crate}`")]
-    pub second_span: Span,
-    pub second_crate: Symbol,
-
-    #[note("in addition to these two, { $num_additional_crates ->
-        [one] another implementation was found in crate {$additional_crate_names}
-        *[other] more implementations were also found in the following crates: {$additional_crate_names}
-    }")]
-    pub additional_crates: Option<()>,
-
-    pub num_additional_crates: usize,
-    pub additional_crate_names: String,
-
-    #[help(
-        "an \"externally implementable item\" can only have a single implementation in the final artifact. When multiple implementations are found, also in different crates, they conflict"
-    )]
-    pub help: (),
-}
-
 #[derive(Diagnostic)]
 #[diag("function doesn't have a default implementation")]
 pub(crate) struct FunctionNotHaveDefaultImplementation {