GCC modified for the FreeChainXenon project
bad357dd1b
This C++23 paper fixes an issue in these views when adapting a certain kind of non-forward range, and we treat it as a DR against C++20. Reviewed-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * include/bits/regex.h (regex_iterator::iterator_concept): Define for C++20 as per P2770R0. (regex_token_iterator::iterator_concept): Likewise. * include/std/ranges (__detail::__as_lvalue): Define. (join_view::_Iterator): Befriend join_view. (join_view::_Iterator::_M_satisfy): Use _M_get_outer instead of _M_outer. (join_view::_Iterator::_M_get_outer): Define. (join_view::_Iterator::_Iterator): Split constructor taking _Parent argument into two as per P2770R0. Remove constraint on default constructor. (join_view::_Iterator::_M_outer): Make this data member present only when the underlying range is forward. (join_view::_Iterator::operator++): Use _M_get_outer instead of _M_outer. (join_view::_Iterator::operator--): Use __as_lvalue helper. (join_view::_Iterator::operator==): Adjust constraints as per P2770R0. (join_view::_Sentinel::__equal): Use _M_get_outer instead of _M_outer. (join_view::_M_outer): New data member when the underlying range is non-forward. (join_view::begin): Adjust definition as per P2770R0. (join_view::end): Likewise. (join_with_view::_M_outer_it): New data member when the underlying range is non-forward. (join_with_view::begin): Adjust definition as per P2770R0. (join_with_view::end): Likewise. (join_with_view::_Iterator::_M_outer_it): Make this data member present only when the underlying range is forward. (join_with_view::_Iterator::_M_get_outer): Define. (join_with_view::_Iterator::_Iterator): Split constructor taking _Parent argument into two as per P2770R0. Remove constraint on default constructor. (join_with_view::_Iterator::_M_update_inner): Adjust definition as per P2770R0. (join_with_view::_Iterator::_M_get_inner): Likewise. (join_with_view::_Iterator::_M_satisfy): Adjust calls to _M_get_inner. Use _M_get_outer instead of _M_outer_it. (join_with_view::_Iterator::operator==): Adjust constraints as per P2770R0. (join_with_view::_Sentinel::operator==): Use _M_get_outer instead of _M_outer_it. * testsuite/std/ranges/adaptors/p2770r0.cc: New test. |
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