1 files changed, 34 insertions, 0 deletions
diff --git a/tools/clang-tidy/test/performance-avoid-endl.cpp b/tools/clang-tidy/test/performance-avoid-endl.cpp
new file mode 100644
index 0000000000..1d7b395b57
--- /dev/null
+++ b/tools/clang-tidy/test/performance-avoid-endl.cpp
@@ -0,0 +1,34 @@
+namespace std {
+  template <typename CharT>
+  class basic_ostream {
+    public:
+    template <typename T>
+    basic_ostream& operator<<(T);
+    basic_ostream& operator<<(basic_ostream<CharT>& (*)(basic_ostream<CharT>&));
+  };
+
+  template <typename CharT>
+  class basic_iostream : public basic_ostream<CharT> {};
+
+  using ostream = basic_ostream<char>;
+  using wostream = basic_ostream<wchar_t>;
+
+  using iostream = basic_iostream<char>;
+  using wiostream = basic_iostream<wchar_t>;
+
+  ostream cout;
+  wostream wcout;
+
+  ostream cerr;
+  wostream wcerr;
+
+  ostream clog;
+  wostream wclog;
+
+  template<typename CharT>
+  basic_ostream<CharT>& endl(basic_ostream<CharT>&);
+} // namespace std
+
+int main() {
+  std::cout << "Hello" << std::endl;
+}