242b4fb7f4
Among other changes, P1983R0 resolves LWG 3278 in a different way, so this patch also reverts the already-applied wording of LWG 3278. The wording for US291 (the join_view::begin hunk) also required adding the friend _Iterator<!_Const> to join_view::_Iterator. This friend is needed so that _Iterator's converting constructor can access the private members of an _Iterator of the opposite constness. The wording for US283 has already been applied it seems. libstdc++-v3/ChangeLog: P1983R0 Wording for GB301, US296, US292, US291, and US283 * include/std/ranges (filter_view::pred): New member function. (join_view::_Iterator::_Iterator): Remove now-redundant comment since P1983R0 fixes the highlighted issue in the same way. (join_view::_Iterator<_Const>): Add friend join_view::_Iterator<!_Const>. (join_view::_M_inner): Remove mutable specifier, effectively reverting the proposed wording changes of P3278. (join_view::begin): Refine the condition for when to return a const iterator. (split_view::_OuterIter::_OuterIter): Adjust constraints. * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred exists and works. |
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