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Views are required to have a amortized O(1) begin(), but our drop_view's const begin overload is O(n) for non-common ranges with a non-sized sentinel. This patch reimplements it so that it's O(1) always. See also LWG 4009. PR libstdc++/112641 libstdc++-v3/ChangeLog: * include/std/ranges (drop_view::begin): Reimplement const overload so that it's O(1) always. * testsuite/std/ranges/adaptors/drop.cc (test10): New test. Reviewed-by: Jonathan Wakely <jwakely@redhat.com> |
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file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.