@@ -759,10 +759,13 @@ namespace __gnu_test
using test_output_sized_range
= test_sized_range<T, output_iterator_wrapper>;
-// test_container, test_range and test_sized_range do not own their elements,
-// so they all model std::ranges::safe_range. This file does not define
-// specializations of std::ranges::enable_safe_range, so that individual
-// test can decide whether or not to do so.
+// test_range and test_sized_range do not own their elements, so they model
+// std::ranges::safe_range. This file does not define specializations of
+// std::ranges::enable_safe_range, so that individual tests can decide
+// whether or not to do so.
+// This is also true for test_container, although only when it has forward
+// iterators (because output_iterator_wrapper and input_iterator_wrapper are
+// not default constructible so do not model std::input_or_output_iterator).
#endif // C++20
} // namespace __gnu_test
#endif // _TESTSUITE_ITERATORS
This fixes a typo and also explains why test_container is not a range when used with output_iterator_wrapper or input_iterator_wrapper. * testsuite/util/testsuite_iterators.h: Improve comment. Committed to trunk. commit 6fe8c46fff330747f1a5995f99af898c0e582c01 Author: Jonathan Wakely <jwakely@redhat.com> Date: Fri Jan 10 22:07:48 2020 +0000 libstdc++: Improve comment about testsuite utilities This fixes a typo and also explains why test_container is not a range when used with output_iterator_wrapper or input_iterator_wrapper. * testsuite/util/testsuite_iterators.h: Improve comment.