gcc/testsuite/g++.dg/cpp2a/typename17.C - gcc - Git at Google

 // DR 2413 - typename in conversion-function-ids.
 // { dg-do compile { target c++20 } }

 template<class T> struct S {
   operator T::X();
 };
	// DR 2413 - typename in conversion-function-ids.
	// { dg-do compile { target c++20 } }

	template<class T> struct S {
	operator T::X();
	};