[clang-tools-extra] [clang-tidy] performance-unnecessary-copy-init: Add a hook... (PR #73921)

[Clement Courbet via cfe-commits]

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@@ -302,6 +303,20 @@ void UnnecessaryCopyInitialization::check(
   }
 }
 
+void UnnecessaryCopyInitialization::makeDiagnostic(
+    DiagnosticBuilder Diagnostic, const VarDecl &Var, const Stmt &BlockStmt,
+    const DeclStmt &Stmt, ASTContext &Context, bool IssueFix) {
+  const bool IsVarUnused = isVariableUnused(Var, BlockStmt, Context);
+  Diagnostic << &Var << IsVarUnused;
+  if (IssueFix) {
+    if (IsVarUnused) {
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legrosbuffle wrote:

Done.

https://github.com/llvm/llvm-project/pull/73921