Index: clang/lib/Format/TokenAnnotator.cpp
===================================================================
--- clang/lib/Format/TokenAnnotator.cpp
+++ clang/lib/Format/TokenAnnotator.cpp
@@ -1611,6 +1611,13 @@
     if (Tok.Next->is(tok::question))
       return false;
 
+    // Functions which end with decorations like volatile, noexcept are unlikely
+    // to be casts.
+    if (Tok.Next->isOneOf(tok::kw_noexcept, tok::kw_volatile, tok::kw_const,
+                          tok::kw_throw, tok::l_square, tok::arrow,
+                          Keywords.kw_override, Keywords.kw_final))
+      return false;
+
     // As Java has no function types, a "(" after the ")" likely means that this
     // is a cast.
     if (Style.Language == FormatStyle::LK_Java && Tok.Next->is(tok::l_paren))
Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -14678,6 +14678,33 @@
   */
 }
 
+TEST_F(FormatTest, NotCastRPaen) {
+
+  verifyFormat("void operator++(int) noexcept;");
+  verifyFormat("void operator++(int &) noexcept;");
+  verifyFormat("void operator delete(void *, std::size_t, const std::nothrow_t "
+               "&) noexcept;");
+  verifyFormat(
+      "void operator delete(std::size_t, const std::nothrow_t &) noexcept;");
+  verifyFormat("void operator delete(const std::nothrow_t &) noexcept;");
+  verifyFormat("void operator delete(std::nothrow_t &) noexcept;");
+  verifyFormat("void operator delete(nothrow_t &) noexcept;");
+  verifyFormat("void operator delete(foo &) noexcept;");
+  verifyFormat("void operator delete(foo) noexcept;");
+  verifyFormat("void operator delete(int) noexcept;");
+  verifyFormat("void operator delete(int &) noexcept;");
+  verifyFormat("void operator delete(int &) volatile noexcept;");
+  verifyFormat("void operator delete(int &) const");
+  verifyFormat("void operator delete(int &) = default");
+  verifyFormat("void operator delete(int &) = delete");
+  verifyFormat("void operator delete(int &) [[noreturn]]");
+  verifyFormat("void operator delete(int &) throw();");
+  verifyFormat("void operator delete(int &) throw(int);");
+  verifyFormat("auto operator delete(int &) -> int;");
+  verifyFormat("auto operator delete(int &) override");
+  verifyFormat("auto operator delete(int &) final");
+}
+
 } // end namespace
 } // end namespace format
 } // end namespace clang