Declare std::array members with attribute const [PR101831].
Resolves:
PR libstdc++/101831 - Spurious maybe-uninitialized warning on std::array::size
libstdc++-v3/ChangeLog:
PR libstdc++/101831
* include/std/array (begin): Declare const member function attribute
const.
(end, rbegin, rend, size, max_size, empty, data): Same.
* testsuite/23_containers/array/capacity/empty.cc: Add test cases.
* testsuite/23_containers/array/capacity/max_size.cc: Same.
* testsuite/23_containers/array/capacity/size.cc: Same.
* testsuite/23_containers/array/iterators/begin_end.cc: New test.
756eabacfc