c++: Add testcase for already fixed PR [PR94508]

We correctly accept this testcase since r11-8144.

gcc/testsuite/ChangeLog:

	PR c++/94508
	* g++.dg/cpp2a/concepts-uneval3.C: New test.

diff --git a/gcc/testsuite/g++.dg/cpp2a/concepts-uneval3.C b/gcc/testsuite/g++.dg/cpp2a/concepts-uneval3.C
new file mode 100644 (file)
index 0000000..7fc4065
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp2a/concepts-uneval3.C
@@ -0,0 +1,9 @@
+// PR c++/94508
+// { dg-do compile { target c++20 } }
+
+template <class T>
+struct A {
+  void f() requires (this, true) { }
+};
+
+template struct A<int>;