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from 8b8165ec804 Minor improvements to testsuite iterator utilities new 33f138133a7 Add iterator concepts and range access customization points [...]

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Summary of changes: libstdc++-v3/ChangeLog | 80 ++ libstdc++-v3/include/Makefile.am | 1 + libstdc++-v3/include/Makefile.in | 1 + libstdc++-v3/include/bits/iterator_concepts.h | 828 +++++++++++++++++++++ libstdc++-v3/include/bits/move.h | 7 +- libstdc++-v3/include/bits/range_access.h | 750 +++++++++++++++++-- libstdc++-v3/include/bits/stl_iterator.h | 16 +- .../include/bits/stl_iterator_base_types.h | 37 +- libstdc++-v3/include/std/concepts | 15 +- libstdc++-v3/testsuite/20_util/forward/c_neg.cc | 2 +- libstdc++-v3/testsuite/20_util/forward/f_neg.cc | 2 +- .../associated_types/incrementable.traits.cc | 142 ++++ .../associated_types/readable.traits.cc | 143 ++++ .../constexpr.cc => contiguous/concept.cc} | 16 +- .../constexpr.cc => contiguous/tag.cc} | 14 +- .../customization_points/iter_move.cc} | 50 +- .../customization_points/iter_swap.cc} | 42 +- .../headers/iterator/synopsis_c++20.cc | 95 +++ .../24_iterators/range_operations/advance.cc | 204 +++++ .../24_iterators/range_operations/distance.cc | 146 ++++ .../24_iterators/range_operations/next.cc | 211 ++++++ .../24_iterators/range_operations/prev.cc | 98 +++ .../requirements/explicit_instantiation/2.cc | 9 +- .../requirements/explicit_instantiation/pod.cc | 9 +- .../requirements/explicit_instantiation/2.cc | 7 +- .../requirements/explicit_instantiation/pod.cc | 7 +- .../experimental/iterator/requirements.cc | 2 + libstdc++-v3/testsuite/std/ranges/access/begin.cc | 140 ++++ libstdc++-v3/testsuite/std/ranges/access/cbegin.cc | 91 +++ .../visit_r.cc => std/ranges/access/cdata.cc} | 56 +- libstdc++-v3/testsuite/std/ranges/access/cend.cc | 98 +++ .../testsuite/std/ranges/access/crbegin.cc | 73 ++ libstdc++-v3/testsuite/std/ranges/access/crend.cc | 108 +++ libstdc++-v3/testsuite/std/ranges/access/data.cc | 78 ++ libstdc++-v3/testsuite/std/ranges/access/empty.cc | 76 ++ libstdc++-v3/testsuite/std/ranges/access/end.cc | 145 ++++ libstdc++-v3/testsuite/std/ranges/access/rbegin.cc | 81 ++ libstdc++-v3/testsuite/std/ranges/access/rend.cc | 105 +++ libstdc++-v3/testsuite/std/ranges/access/size.cc | 116 +++ libstdc++-v3/testsuite/util/testsuite_iterators.h | 144 +++- 40 files changed, 4108 insertions(+), 137 deletions(-) create mode 100644 libstdc++-v3/include/bits/iterator_concepts.h create mode 100644 libstdc++-v3/testsuite/24_iterators/associated_types/incrementa [...] create mode 100644 libstdc++-v3/testsuite/24_iterators/associated_types/readable.t [...] copy libstdc++-v3/testsuite/24_iterators/{ostream_iterator/requirements/constexpr. [...] copy libstdc++-v3/testsuite/24_iterators/{ostream_iterator/requirements/constexpr. [...] copy libstdc++-v3/testsuite/{18_support/destroying_delete.cc => 24_iterators/custo [...] copy libstdc++-v3/testsuite/{20_util/variant/visit_neg.cc => 24_iterators/customiz [...] create mode 100644 libstdc++-v3/testsuite/24_iterators/headers/iterator/synopsis_c++20.cc create mode 100644 libstdc++-v3/testsuite/24_iterators/range_operations/advance.cc create mode 100644 libstdc++-v3/testsuite/24_iterators/range_operations/distance.cc create mode 100644 libstdc++-v3/testsuite/24_iterators/range_operations/next.cc create mode 100644 libstdc++-v3/testsuite/24_iterators/range_operations/prev.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/begin.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/cbegin.cc copy libstdc++-v3/testsuite/{20_util/variant/visit_r.cc => std/ranges/access/cdata [...] create mode 100644 libstdc++-v3/testsuite/std/ranges/access/cend.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/crbegin.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/crend.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/data.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/empty.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/end.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/rbegin.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/rend.cc create mode 100644 libstdc++-v3/testsuite/std/ranges/access/size.cc