03cf8d54e5
A range being a random access range isn't a sufficient condition for ranges::next(iter, sent) to have constant time complexity -- it must also have a sized sentinel. This adjusts the memoization condition for reverse_view accordingly. libstdc++-v3/ChangeLog: PR libstdc++/100621 * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to true if the underlying non-common random-access range doesn't have a sized sentinel. |
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