+ /* Execute any function which might still want to register tests. Once each
+ function has been executed, clear lazy_generators to ensure that
+ callback functions are only executed once. */
+ for (const auto &generator : lazy_generators)
+ for (selftest &test : generator ())
+ register_test (std::move (test.name), std::move (test.test));
+ lazy_generators.clear ();
+
+ return selftests_range (tests.cbegin (), tests.cend ());