Ignore Wunreachable-code-return in Generators.tests.cpp

tests/SelfTest/UsageTests/Generators.tests.cpp

@@ -281,6 +281,11 @@ TEST_CASE("#1913 - GENERATEs can share a line", "[regression][generators]") {
     REQUIRE(i != j);
 }
 
+#if defined( __clang__ )
+# pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wunreachable-code-return"
+#endif
+
 namespace {
     class test_generator : public Catch::Generators::IGenerator<int> {
     public:
@@ -306,6 +311,10 @@ namespace {
 
 } // namespace
 
+#if defined( __clang__ )
+#    pragma clang diagnostic pop
+#endif
+
 TEST_CASE( "#2615 - Throwing in constructor generator fails test case but does not abort",
            "[!shouldfail][regression][generators]" ) {
     // this should fail the test case, but not abort the application