1 files changed, 23 insertions, 0 deletions
diff --git a/compilerplugins/clang/test/unnecessaryparen.cxx b/compilerplugins/clang/test/unnecessaryparen.cxx
index ccc2b4ce6556..89ca84da6ab2 100644
--- a/compilerplugins/clang/test/unnecessaryparen.cxx
+++ b/compilerplugins/clang/test/unnecessaryparen.cxx
@@ -7,6 +7,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
+#include <cstddef>
 #include <memory>
 #include <string>
 #include <rtl/ustring.hxx>
@@ -34,6 +35,13 @@ template <> struct typed_flags<BrowseMode> : is_typed_flags<BrowseMode, 0xf>
 };
 }
 
+void f(char const *);
+char const * operator ""_s1(char const *, std::size_t);
+#if __cplusplus >= 202002L
+struct Str { constexpr Str(char const *) {} };
+template<Str> char const * operator ""_s2();
+#endif
+
 int main()
 {
     int x = 1;
@@ -115,6 +123,21 @@ int main()
     (void)nBits;
 
     OUString::number((v2+1)); // expected-error {{parentheses immediately inside single-arg call [loplugin:unnecessaryparen]}}
+
+    (void) ("foo"); // expected-error {{unnecessary parentheses around single-token string literal [loplugin:unnecessaryparen]}}
+    (void) ("foo" "bar");
+    f(("foo")); // expected-error {{parentheses immediately inside single-arg call [loplugin:unnecessaryparen]}}
+    f(("foo" "bar"));
+    (void) ("foo"_s1); // expected-error {{unnecessary parentheses around single-token string literal [loplugin:unnecessaryparen]}}
+    (void) ("foo" "bar"_s1);
+    f(("foo"_s1)); // expected-error {{parentheses immediately inside single-arg call [loplugin:unnecessaryparen]}}
+    f(("foo" "bar"_s1));
+#if __cplusplus >= 202002L
+    (void) ("foo"_s2); //TODO: expected error {{unnecessary parentheses around single-token string literal [loplugin:unnecessaryparen]}}
+    (void) ("foo" "bar"_s2);
+    f(("foo"_s2)); // TODO: expected error {{parentheses immediately inside single-arg call [loplugin:unnecessaryparen]}}
+    f(("foo" "bar"_s2));
+#endif
 };
 
 struct B { operator bool() const; };