================
@@ -0,0 +1,27 @@
+// RUN: %check_clang_tidy -std=c++20-or-later %s modernize-type-traits %t
+
+namespace std {
+template <class> struct remove_cv {
+ using type = int;
+};
+template <class T>
+using remove_cv_t = typename remove_cv<T>::type; // NOLINT
+
+template <class> struct remove_reference {
+ using type = int;
+};
+template <class T>
+using remove_reference_t = typename remove_reference<T>::type; // NOLINT
+}
+
+using foo = std::remove_cv_t<std::remove_reference_t<int>>;
+// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: use c++20 type alias
+// CHECK-FIXES: using foo = std::remove_cvref_t<int>;
+
+std::remove_cv_t<std::remove_reference_t<int>> var;
+// CHECK-MESSAGES: :[[@LINE-1]]:1: warning: use c++20 type alias
+// CHECK-FIXES: std::remove_cvref_t<int> var;
+
+template<class=std::remove_cv_t<std::remove_reference_t<int>>> struct Foo {};
+// CHECK-MESSAGES: :[[@LINE-1]]:16: warning: use c++20 type alias
+// CHECK-FIXES: template<class=std::remove_cvref_t<int>> struct Foo {};
----------------
vbvictor wrote:
Please add test with macro as well
https://github.com/llvm/llvm-project/pull/204789
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