2020-02-28 Patrick Palka * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false whenever the underlying range models common_range. * include/std/ranges (__detail::_CachedPosition): New struct. (views::filter_view::_S_needs_cached_begin): New member variable. (views::filter_view::_M_cached_begin): New member variable. (views::filter_view::begin): Use _M_cached_begin to cache its result. (views::drop_view::_S_needs_cached_begin): New static member variable. (views::drop_view::_M_cached_begin): New member variable. (views::drop_view::begin): Use _M_cached_begin to cache its result when _S_needs_cached_begin. (views::drop_while_view::_M_cached_begin): New member variable. (views::drop_while_view::begin): Use _M_cached_begin to cache its result. (views::reverse_view::_S_needs_cached_begin): New static member variable. (views::reverse_view::_M_cached_begin): New member variable. (views::reverse_view::begin): Use _M_cached_begin to cache its result when _S_needs_cached_begin. * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that drop_view::begin caches its result. * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check that drop_while_view::begin caches its result. * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that filter_view::begin caches its result. * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that reverse_view::begin caches its result. 2020-02-28 Jonathan Wakely * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for filesystems that silently truncate timestamps. * testsuite/experimental/filesystem/operations/last_write_time.cc: Likewise. * testsuite/21_strings/basic_string/cons/char/1.cc: Disable -Wstringop-overflow warnings. 2020-02-27 Jonathan Wakely * testsuite/lib/libstdc++.exp (v3_target_compile): Add -fdiagnostics-urls=never to options. 2020-02-27 Patrick Palka * include/std/ranges (transform_view::_Iterator<_Const>): Befriend _Iterator. (transform_view::_Sentinel<_Const>): Befriend _Sentinel. (take_view::_Sentinel<_Const>): Likewise. (take_while_view::_Sentinel<_Const>): Likewise. (split_view::_OuterIter<_Const>): Befriend _OuterIter. * testsuite/std/ranges/adaptors/split.cc: Augment test. * testsuite/std/ranges/adaptors/take.cc: Augment test. * testsuite/std/ranges/adaptors/take_while.cc: Augment test. * testsuite/std/ranges/adaptors/transform.cc: Augment test. * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the base() of a vector<>::iterator is a pointer. * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise. * testsuite/25_algorithms/move/constrained.cc: Likewise. * testsuite/25_algorithms/move_backward/constrained.cc: Likewise. * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data() instead of &foo[0]. * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise. * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise. * testsuite/25_algorithms/shuffle/constrained.cc: Likewise. * testsuite/25_algorithms/sort/constrained.cc: Likewise. * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise. 2020-02-27 Jonathan Wakely * include/debug/array (operator<=>): Define for C++20. * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc: Adjust dg-error line numbers. * testsuite/23_containers/array/tuple_interface/ tuple_element_debug_neg.cc: Likewise. * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before defining _GLIBCXX_ASSERTIONS. * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise. * testsuite/23_containers/span/first_assert_neg.cc: Likewise. * testsuite/23_containers/span/front_assert_neg.cc: Likewise. * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise. * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise. * testsuite/23_containers/span/last_assert_neg.cc: Likewise. * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise. * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise. * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise. * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise. * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise. * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise. * include/debug/string (__gnu_debug::basic_string::insert): Fix for C++98 where the member function of the base class returns void. * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add equality comparisons that support value-initialized iterators. * include/bits/boost_concept_check.h (__function_requires): Add _GLIBCXX14_CONSTEXPR. * testsuite/25_algorithms/min/concept_checks.cc: New test. 2020-02-26 Patrick Palka PR libstdc++/93936 * include/std/ranges (split_view::_InnerIter::operator==): Compare the operands' _M_i rather than their _M_i.current(). * testsuite/std/ranges/adaptors/split.cc: Augment test. P1645R1 constexpr for algorithms * include/bits/stl_numeric.h (iota, accumulate, inner_product, partial_sum, adjacent_difference): Make conditionally constexpr for C++20. * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature test macro. (reduce, transform_reduce, exclusive_scan, inclusive_scan, transform_exclusive_scan, transform_inclusive_scan): Make conditionally constexpr for C++20. * include/std/version (__cpp_lib_constexpr_numeric): Define. * testsuite/26_numerics/accumulate/constexpr.cc: New test. * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise. * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/inner_product/constexpr.cc: Likewise. * testsuite/26_numerics/iota/constexpr.cc: Likewise. * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise. * testsuite/26_numerics/reduce/constexpr.cc: Likewise. * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise. 2020-02-26 Jonathan Wakely * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare variables in smaller scope and avoid calling ranges::distance when we know they are pointers. Remove statically-unreachable use of __builtin_unreachable(). * include/bits/stl_algobase.h (__lexicographical_compare::__lc): Define inline. * include/std/ranges (__detail::__maybe_empty_t): Define new helper alias. (__detail::__maybe_const_t): Likewise. (__adaptor::_RangeAdaptor): Use __maybe_empty_t. (transform_view, take_view, take_while_view, elements_view): Use __maybe_const_t. (join_view, split_view): Use both. 2020-02-25 Patrick Palka LWG 3397 basic_istream_view::iterator should not provide iterator_category * include/std/ranges (basic_istream_view:_Iterator::iterator_category): Rename to ... (basic_istream_view:_Iterator::iterator_concept): ... this. * testsuite/std/ranges/istream_view.cc: Augment test. LWG 3325 Constrain return type of transformation function for transform_view * include/std/ranges (transform_view): Constrain the return type of the transformation function as per LWG 3325. * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test. LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained * include/std/ranges (join_view::_Iterator::operator--): Require that range_reference_t<_Base> models common_range. * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test. LWG 3301 transform_view::_Iterator has incorrect iterator_category * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust determination of iterator_category as per LWG 3301. * testsuite/std/ranges/adaptors/transform.cc: Augment test. LWG 3292 iota_view is under-constrained * include/std/ranges (iota_view): Require that _Winc models semiregular as per LWG 3292. * testsuite/std/ranges/iota/lwg3292_neg.cc: New test. 2020-02-25 Jonathan Wakely * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove during constant evaluation. Call __builtin_memmove directly instead of __memmove. (__copy_or_move_backward): Likewise. * include/bits/stl_algobase.h (__memmove): Remove. (__copy_move::__copy_m) (__copy_move_backward::__copy_m): Use __builtin_memmove directly instead of __memmove. (__copy_move_a2): Do not use memmove during constant evaluation. (__copy_move_backward_a2): Use _IsMove constant to select correct __copy_move_backward specialization. * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies begin turned into moves during constant evaluation. * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of previous commit. PR libstdc++/93872 * include/bits/stl_algobase.h (__memmove): Cast away const before doing move assignment. * testsuite/25_algorithms/move/93872.cc: New test. * testsuite/25_algorithms/move_backward/93872.cc: New test. 2020-02-24 Patrick Palka PR libstdc++/93884 * include/bits/ranges_algobase.h (__copy_or_move, __copy_or_move_backward): Don't inspect the iter_value_t of the output iterator, instead inspect its iterator_traits directly. * include/bits/stl_iterator.h (back_insert_iterator::container): Conditionally initialize. (back_insert_iterator::difference_type): Conditionally define. (back_insert_iterator::back_insert_iterator): Conditionally define this default constructor. (front_insert_iterator::container): Conditionally initialize. (front_insert_iterator::difference_type): Conditionally define. (front_insert_iterator::front_insert_iterator): Conditionally define this default constructor. * 24_iterators/back_insert_iterator/pr93884.cc: New test. * 24_iterators/front_insert_iterator/pr93884.cc: New test. P0769R2 Add shift to * include/bits/ranges_algo.h (shift_left, shift_right): New. * testsuite/25_algorithms/shift_left/1.cc: New test. * testsuite/25_algorithms/shift_right/1.cc: New test. 2020-02-24 Jonathan Wakely * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)): Make noexcept-specifier conditional. * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check noexcept-specifier. * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)): Add constructor. (operator==(istream_iterator, default_sentinel_t)): Add operator. (ostream_iterator::difference_type): Define to ptrdiff_t for C++20. * include/bits/streambuf_iterator.h (istreambuf_iterator(default_sentinel_t)): Add constructor. (operator==(istreambuf_iterator, default_sentinel_t)): Add operator. * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: New test. * testsuite/24_iterators/istream_iterator/sentinel.cc: New test. * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc: New test. * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test. * include/std/ranges (__deep_const_range, __enable_view_impl): Remove. (ranges::enable_view): Simplify (LWG 3326). * include/bits/range_access.h (ranges::enable_view): Declare. * include/bits/regex.h (__enable_view_impl): Remove partial specialization. * include/bits/stl_multiset.h (__enable_view_impl): Likewise. * include/bits/stl_set.h (__enable_view_impl): Likewise. * include/bits/unordered_set.h (__enable_view_impl): Likewise. * include/debug/multiset.h (__enable_view_impl): Likewise. * include/debug/set.h (__enable_view_impl): Likewise. * include/debug/unordered_set (__enable_view_impl): Likewise. * include/experimental/string_view (ranges::enable_view): Define partial specialization. * include/std/span (ranges::enable_view): Likewise. * include/std/string_view (ranges::enable_view): Likewise. * testsuite/std/ranges/view.cc: Check satisfaction of updated concept. 2020-02-21 Jonathan Wakely * include/std/optional (operator<=>(optional, optional)) (operator<=>(optional, nullopt), operator<=>(optional, U)): Define for C++20. * include/std/tuple (__tuple_cmp): New helper function for <=>. (operator<=>(tuple, tuple...)): Define for C++20. * include/std/variant (operator<=>(variant, variant)) (operator<=>(monostate, monostate)): Define for C++20. * testsuite/20_util/optional/relops/three_way.cc: New test. * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test. * testsuite/20_util/variant/89851.cc: Move to ... * testsuite/20_util/variant/relops/89851.cc: ... here. * testsuite/20_util/variant/90008.cc: Move to ... * testsuite/20_util/variant/relops/90008.cc: ... here. * testsuite/20_util/variant/relops/three_way.cc: New test. 2020-02-20 Patrick Palka * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility function. (views::__adaptor::_RangeAdaptor::operator()): Add comments. Use __maybe_refwrap to capture lvalue references by reference, and then use unwrap_reference_t to forward the by-reference captures as references. * testsuite/std/ranges/adaptors/split.cc: Augment test. * testsuite/std/ranges/adaptors/split_neg.cc: New test. * include/std/ranges (iota_view): Forward declare _Sentinel. (iota_view::_Iterator): Befriend _Sentinel. (iota_view::_Sentinel::_M_equal): New member function. (iota_view::_Sentinel::operator==): Use it. (views::_Iota::operator()): Forward __f using the correct type. * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota with integers of different signedness, to appease iota_view's deduction guide. * testsuite/std/ranges/iota/iota_view.cc: Augment test. 2020-02-20 Jonathan Wakely * include/bits/range_access.h (ranges::begin): Reject array of incomplete type. (ranges::end, ranges::size): Require arrays to be bounded. (ranges::data): Require lvalue or borrowed_range. (ranges::iterator_t): Remove constraint. * testsuite/std/ranges/access/begin.cc: Do not check array of incomplete type. * testsuite/std/ranges/access/begin_neg.cc: New test. * testsuite/std/ranges/access/end_neg.cc: Adjust expected error. * testsuite/std/ranges/access/size_neg.cc: Adjust expected error. * testsuite/std/ranges/access/ssize.cc: Do not check array of incomplete type. * include/std/system_error (error_category::operator<=>) (operator<=>(const error_code&, const error_code&)) (operator<=>(const error_condition&, const error_condition&)): Define for C++20. * testsuite/19_diagnostics/error_category/operators/less.cc: New test. * testsuite/19_diagnostics/error_category/operators/three_way.cc: New test. * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove incorrect comment. * testsuite/19_diagnostics/error_code/operators/less.cc: New test. * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove incorrect comment. * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test. * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove incorrect comment. * testsuite/19_diagnostics/error_condition/operators/less.cc: New test. * testsuite/19_diagnostics/error_condition/operators/not_equal.cc: Remove incorrect comment. * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New test. * libsupc++/typeinfo (type_info::operator!=): Remove for C++20. * include/std/thread (thread::id::operator<=>): Define for C++20. * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of functions in namespace std. * testsuite/30_threads/thread/id/operators_c++20.cc: New test. 2020-02-19 Patrick Palka * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the null terminator of the underlying string as part of the test_range. (main): Call test03. 2020-02-19 Jonathan Wakely * include/bits/stl_iterator.h (common_iterator): Add copyable requirement (LWG 3385). * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust expected declaration. * include/std/ranges (take_while_view, drop_view, drop_while_view) (elements_view:_Iterator): Initialize data members (LWG 3364). * libsupc++/compare (three_way_comparable): Remove always-false check that should have been removed with weak_equality (P1959R0). (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360). * include/std/concepts (__detail::__partially_ordered_with): Move here from . (totally_ordered, totally_ordered_with): Use __partially_ordered_with to simplify definition (LWG 3331). * libsupc++/compare (__detail::__partially_ordered_with): Move to . * include/std/concepts (totally_ordered_with): Remove redundant requirement (LWG 3329). * include/std/ranges (__detail::__convertible_to_non_slicing): New helper concept. (__detail::__pair_like_convertible_to): Remove. (__detail::__pair_like_convertible_from): Add requirements for non-slicing conversions. (subrange): Constrain constructors with __convertible_to_non_slicing. Remove constructors from pair-like types. Add new deduction guide. * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test. * include/bits/iterator_concepts.h (iter_move): Add declaration to prevent unqualified lookup finding a suitable declaration (LWG 3247). * include/std/memory_resource (polymorphic_allocator::allocate) (polymorphic_allocator::allocate_object): Change type of exception to bad_array_new_length (LWG 3237). * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test. * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348). * include/std/version (__cpp_lib_unwrap_ref): Likewise. * testsuite/20_util/unwrap_reference/1.cc: Check macro. * testsuite/20_util/unwrap_reference/3.cc: New test. * include/std/numeric (midpoint(T8, T*)): Do not check for complete type during overload resolution, use static assert instead (LWG 3200). * testsuite/26_numerics/midpoint/pointer.cc: Do not test with incomplete type. * testsuite/26_numerics/midpoint/pointer_neg.cc: New test. * include/std/span (span(T (&)[N])): Use non-deduced context to prevent first parameter from interfering with class template argument deduction (LWG 3369). * testsuite/23_containers/span/deduction.cc: Add missing 'const'. * testsuite/23_containers/span/lwg3255.cc: Check for construction from rvalues. * include/std/span (span::const_iterator, span::const_reverse_iterator) (span::cbegin(), span::cend(), span::crbegin(), span::crend()): Remove (LWG 3320). * testsuite/23_containers/span/everything.cc: Replace uses of cbegin and cend. * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: Likewise. * testsuite/20_util/specialized_algorithms/uninitialized_copy/ constrained.cc: Likewise. * testsuite/20_util/specialized_algorithms/ uninitialized_default_construct/constrained.cc: Likewise. * testsuite/20_util/specialized_algorithms/uninitialized_fill/ constrained.cc: Likewise. * testsuite/20_util/specialized_algorithms/uninitialized_move/ constrained.cc: Likewise. * testsuite/20_util/specialized_algorithms/ uninitialized_value_construct/constrained.cc: Likewise. * include/bits/range_access.h (range_size_t): Define alias template. * include/std/ranges (all_view): Rename to views::all_t (LWG 3335). * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name. * include/std/ranges (filter_view, transform_view, take_view) (join_view, split_view, reverse_view): Remove commented-out converting constructors (LWG 3280). * include/std/memory (uninitialized_construct_using_allocator): Use std::construct_at (LWG 3321). * include/std/memory_resource (polymorphic_allocator::allocate_bytes) (polymorphic_allocator::allocate_object) (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304). LWG 3379. "safe" in several library names is misleading * include/bits/range_access.h (enable_safe_range): Rename to enable_borrowed_range. (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range. (safe_range): Rename to borrowed_range. * include/bits/ranges_algo.h: Adjust to use new names. * include/bits/ranges_algobase.h: Likewise. * include/bits/ranges_uninitialized.h: Likewise. * include/std/ranges: Likewise. (safe_iterator_t): Rename to borrowed_iterator_t. (safe_subrange_t): Rename to borrowed_subrange_t. * include/std/span: Adjust to use new names. * include/std/string_view: Likewise. * include/experimental/string_view: Likewise. * testsuite/std/ranges/access/begin.cc: Likewise. * testsuite/std/ranges/access/cbegin.cc: Likewise. * testsuite/std/ranges/access/cdata.cc: Likewise. * testsuite/std/ranges/access/cend.cc: Likewise. * testsuite/std/ranges/access/crbegin.cc: Likewise. * testsuite/std/ranges/access/crend.cc: Likewise. * testsuite/std/ranges/access/data.cc: Likewise. * testsuite/std/ranges/access/end.cc: Likewise. * testsuite/std/ranges/access/rbegin.cc: Likewise. * testsuite/std/ranges/access/rend.cc: Likewise. * testsuite/std/ranges/safe_range.cc: Likewise. * testsuite/std/ranges/safe_range_types.cc: Likewise. * testsuite/util/testsuite_iterators.h: Likewise. * include/std/ranges (tuple_element<0, const subrange>) (tuple_element<1, const subrange>): Add partial specializations (LWG 3398). * testsuite/std/ranges/subrange/tuple_like.cc: New test. * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn) (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn) (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool. 2020-02-18 Patrick Palka 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. (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. 2020-02-18 Jonathan Wakely PR libstdc++/93818 * include/std/ranges (_RangeAdaptor): Add deduction guide. (filter_view::_Iterator): Add alias _Vp_iter and use in place of iterator_t<_Vp>. (filter_view::_Iterator::_S_iter_cat()): Add 'typename'. (transform_view::_Iterator): Add alias _Base_iter and use in place of iterator_t<_Base>. (transform_view::_Iterator::_S_iter_cat()): Add 'typename'. (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases. (join_view::_Iterator::_S_iter_cat()): Add 'typename'. (split_view::_InnerIter::_S_iter_cat()): Likewise. * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid assumption that long is wider than int. * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise. * testsuite/20_util/integer_comparisons/less.cc: Likewise. * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise. * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise. P1976R2 Fixed-size span construction from dynamic range * include/std/span (__cpp_lib_span): Update value. (span(It, size_type), span(It, End)): Make conditionally explicit. Add assertion. (span(R&&), span(const span&)): Likewise and relax constraints. (span::first(), span::last()): Use explicit type in return statement. (as_bytes, as_writable_bytes): Likewise. * include/std/version (__cpp_lib_span): Update value. * testsuite/23_containers/span/1.cc: Check new value. * testsuite/23_containers/span/2.cc: Check new value. * testsuite/23_containers/span/explicit.cc: New test. * include/std/span (span::__is_compatible_array): Simplify alias template by using requires-clause. (span::__is_compatible_ref): New alias template for constraining constructors. (span::__is_compatible_iterator, span::__is_compatible_range): Remove. (span(It, size_type), span(It, End)): Use __is_compatible_ref. (span(T(&)[N], span(array&), span(const array&)): Remove redundant parentheses. (span(R&&)): Add missing constraints. * include/std/span (span): Reorder members and rename template parameters to match declarations in the C++2a working paper. P2116R0 Remove tuple-like protocol support from fixed-extent span * include/std/span (get, tuple_size, tuple_element): Remove. * testsuite/23_containers/span/everything.cc: Remove checks for tuple-like API. * testsuite/23_containers/span/get_neg.cc: Remove. * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove. * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove. * testsuite/23_containers/span/tuple_size_neg.cc: Remove. 2020-02-17 Patrick Palka P2106R0 Alternative wording for GB315 and GB316 * include/bits/ranges_algo.h (in_fun_result): New. (for_each_result, for_each_n_result): Change into an alias of in_fun_result. (in_in_result): New. (mismatch_result): Change into an alias of in_in_result. (copy_if_result): Change into an alias of in_out_result. (swap_ranges_result): Change into an alias of in_in_result. (unary_transform_result): Change into an alias of in_out_result. (in_in_out_result): New. (binary_transform_result): Change into an alias of in_in_out_result. (replace_copy_result, replace_copy_if_result, remove_copy_if_result, remove_copy_result, unique_copy_result, reverse_copy_result, rotate_copy_result, partial_sort_copy_result): Change into an alias of in_out_result. (in_out_out_result): New. (partition_copy_result, merge_result): Change into an alias of in_out_out_result. (set_union_result, set_intersection_result): Change into an alias of in_in_out_result. (set_difference_result): Change into an alias of in_out_result. (set_symmetric_difference): Change into an alias of in_in_out_result. (min_max_result): New. (minmax_result, minmax_element_result): Change into an alias of min_max_result. (in_found_result): New. (next_permutation_result, prev_permutation_result): Change into an alias of in_found_result. (__next_permutation_fn::operator(), __prev_permutation_fn::operator()): Adjust following changes to next_permutation_result and prev_permutation_result. * include/bits/ranges_algobase.h (in_out_result): New. (copy_result, move_result, move_backward_result, copy_backward_result, copy_n_result): Change into an alias of in_out_result. * include/bits/ranges_uninitialized.h (uninitialized_copy_result, uninitialized_copy_n_result, uninitialized_move_result, uninitialized_move_n_result): Likewise. * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of structured bindings. * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise. P1243R4 Rangify new algorithms * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn, for_each_n, __sample_fn, sample, __clamp_fn, clamp): New. * testsuite/25_algorithms/clamp/constrained.cc: New test. * testsuite/25_algorithms/for_each/constrained.cc: Augment test. * testsuite/25_algorithms/sample/constrained.cc: New test. 2020-02-17 Jonathan Wakely P1964R2 Wording for boolean-testable * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn) (__adjacent_find_fn): Cast result of predicate to bool. * include/std/concepts (__boolean): Remove. (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add new helper concepts. (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with) (predicate): Use __boolean_testable instead of boolean. * libsupc++/compare (__detail::__partially_ordered, _Synth3way): Likewise. P1970R2 Consistency for size() functions: Add ranges::ssize * include/bits/range_access.h (_SSize, ssize): Define for C++20. * testsuite/std/ranges/access/ssize.cc: New test. P1956R1 On the names of low-level bit manipulation functions * include/bits/hashtable_policy.h: Update comment. * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename. (ispow2, ceil2, floor2, log2p1): Likewise. (__cpp_lib_int_pow2): Add feature test macro. * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1. * include/std/memory (assume_aligned): Adjust use of ispow2. * include/std/version (__cpp_lib_int_pow2): Add. * libsupc++/new_opa.cc: Adjust use of __ispow2. * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1. * testsuite/17_intro/freestanding.cc: Adjust use of ispow2. * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ... * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here. * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ... * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here. * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ... * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here. * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ... * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here. * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ... * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here. * include/std/charconv: Add comment. PR libstdc++/92546 (partial) * include/bits/random.h (uniform_random_bit_generator): Move definition to . * include/bits/ranges_algo.h: Include instead of . * include/bits/ranges_algobase.h: Do not include . * include/bits/uniform_int_dist.h (uniform_random_bit_generator): Move here. * include/std/ranges: Do not include . * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno. PR libstdc++/92546 (partial) * include/Makefile.am: Add new header. * include/Makefile.in: Regenerate. * include/bits/int_limits.h: New header. * include/bits/parse_numbers.h (__select_int::_Select_int): Replace numeric_limits with __detail::__int_limits. * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one) (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1): Likewise. * include/std/charconv (__to_chars_8, __from_chars_binary) (__from_chars_alpha_to_num, from_chars): Likewise. * include/std/memory_resource (polymorphic_allocator::allocate) (polymorphic_allocator::allocate_object): Likewise. * include/std/string_view (basic_string_view::_S_compare): Likewise. * include/std/utility (in_range): Likewise. * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for extra error about incomplete type __int_limits. * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include . * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise. * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise. * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise. * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise. * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise. * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise. * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise. * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise. * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise. * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise. * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise. * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update value for partial_ordering::unordered. * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add const-qualified expression variations. * include/std/concepts (copyable): Likewise. * include/std/type_traits (__is_standard_integer): New helper trait. * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater) (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20. * include/std/version (__cpp_lib_integer_comparison_functions): Define. * testsuite/20_util/integer_comparisons/1.cc: New test. * testsuite/20_util/integer_comparisons/2.cc: New test. * testsuite/20_util/integer_comparisons/equal.cc: New test. * testsuite/20_util/integer_comparisons/equal_neg.cc: New test. * testsuite/20_util/integer_comparisons/greater_equal.cc: New test. * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test. * testsuite/20_util/integer_comparisons/greater_neg.cc: New test. * testsuite/20_util/integer_comparisons/in_range.cc: New test. * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test. * testsuite/20_util/integer_comparisons/less.cc: New test. * testsuite/20_util/integer_comparisons/less_equal.cc: New test. * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test. * testsuite/20_util/integer_comparisons/less_neg.cc: New test. * testsuite/20_util/integer_comparisons/not_equal.cc: New test. * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test. 2020-02-16 Patrick Palka * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()): Move code after an early exit constexpr if to under an else branch. * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise. 2020-02-15 Patrick Palka * include/bits/ranges_algo.h: Adjust whitespace and formatting. * include/bits/ranges_algobase.h: Likewise. * include/bits/ranges_uninitialized.h: Likewise. * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of, binary_search, copy_if, count, count_if, equal_range, find, find_end, find_first_of, find_if, find_if_not, for_each, generate, generate_n, includes, inplace_merge, is_heap, is_heap_until, is_partitioned, is_permutation, is_sorted, is_sorted_until, lexicographical_compare, lower_bound, make_heap, max, max_element, merge, min, min_element, minmax, minmax_element, mismatch, next_permutation, none_of, nth_element, partial_sort, partial_sort_copy, partition, partition_copy, partition_point, pop_heap, prev_permutation, push_heap, remove, remove_copy, remove_copy_if, remove_if, replace, replace_copy, replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy, search, search_n, set_difference, set_intersection, set_symmetric_difference, set_union, shuffle, sort, sort_heap, stable_partition, stable_sort, swap_ranges, transform, unique, unique_copy, upper_bound): Convert into function objects. * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n, fill, move_backward, copy_backward): Likewise. * include/bits/ranges_uninitialized.h (uninitialized_default_construct, uninitialized_default_construct_n, uninitialized_value_construct, uninitialized_value_construct_n, uninitialized_copy, uninitialized_copy_n, uninitialized_move, uninitialized_move_n, uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at, destroy, destroy_n): Likewise. * include/bits/ranges_algo.h (ranges::__find_end): Fold into ... (ranges::find_end): ... here. (ranges::__lexicographical_compare): Fold into ... (ranges::lexicographical_compare): ... here. * include/bits/ranges_algobase.h (ranges::__equal): Fold into ... (ranges::equal): ... here. 2020-02-15 Jonathan Wakely * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L. * include/std/deque: Likewise. * include/std/forward_list: Likewise. * include/std/list: Likewise. * include/std/string: Likewise. * include/std/vector: Likewise. * include/std/version: Likewise. * testsuite/23_containers/deque/erasure.cc: Test for new value. * testsuite/23_containers/forward_list/erasure.cc: Likewise. * testsuite/23_containers/list/erasure.cc: Likewise. * testsuite/23_containers/map/erasure.cc: Likewise. * testsuite/23_containers/set/erasure.cc: Likewise. * testsuite/23_containers/unordered_map/erasure.cc: Likewise. * testsuite/23_containers/unordered_set/erasure.cc: Likewise. * testsuite/23_containers/vector/erasure.cc: Likewise. 2020-02-15 Jonathan Wakely * include/bits/random.h (uniform_random_bit_generator): Require min() and max() to be constant expressions and min() to be less than max(). * testsuite/26_numerics/random/concept.cc: Check additional cases. * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno. 2020-02-13 Patrick Palka * include/Makefile.am: Add . * include/Makefile.in: Regenerate. * include/bits/ranges_uninitialized.h: New header. * include/std/memory: Include it. * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New test. * .../uninitialized_copy/constrained.cc: New test. * .../uninitialized_default_construct/constrained.cc: New test. * .../uninitialized_fill/constrained.cc: New test. * .../uninitialized_move/constrained.cc: New test. * .../uninitialized_value_construct/constrained.cc: New test. * include/Makefile.am: Add bits/ranges_algobase.h * include/Makefile.in: Regenerate. * bits/ranges_algo.h: Include and refactor existing #includes. (__detail::__is_normal_iterator, __detail::is_reverse_iterator, __detail::__is_move_iterator, copy_result, move_result, __equal, equal, copy_result, move_result, move_backward_result, copy_backward_result, __copy_or_move_backward, __copy_or_move, copy, move, copy_backward, move_backward, copy_n_result, copy_n, fill_n, fill): Split out into ... * bits/range_algobase.h: ... this new header. 2020-02-12 Patrick Palka LWG 3389 and LWG 3390 * include/bits/stl_iterator.h (move_move_iterator): Use std::move when constructing the move_iterator with __i. (counted_iterator::counted_iterator): Use std::move when initializing M_current with __i. * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test. * testsuite/24_iterators/move_iterator/lwg3390.cc: New test. 2020-02-12 Sandra Loosemore PR libstdc++/79193 PR libstdc++/88999 * configure: Regenerated. 2020-02-12 François Dumont * include/bits/hashtable.h (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add missing std namespace qualification to forward call. 2020-02-09 Jonathan Wakely * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix comment. * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise. * include/std/ranges: Fix non-ASCII characters in comment. * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require equality comparison to be valid and return bool. (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison. * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check type with ambiguous conversion to fundamental types. * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise. 2020-02-07 Jonathan Wakely * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t): Use remove_cvref_t. (readable_traits): Rename to indirectly_readable_traits. (readable): Rename to indirectly_readable. (writable): Rename to indirectly_writable. (__detail::__iter_exchange_move): Do not use remove_reference_t. (indirectly_swappable): Adjust requires expression parameter types. expression. * include/bits/ranges_algo.h (ranges::transform, ranges::replace) (ranges::replace_if, ranges::generate_n, ranges::generate) (ranges::remove): Use new name for writable. * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow): Use new name for readable. * include/ext/pointer.h (readable_traits<_Pointer_adapter

>): Use new name for readable_traits. * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise. * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for new definition of indirectly_readable. * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change to take parameters of common_iterator, instead of the common_iterator type itself. Fix argument for __common_iter_has_arrow constraint. (iterator_traits>::pointer): Adjust. 2020-02-07 Jonathan Wakely * include/std/ranges (iota_view): Add braces to prevent -Wempty-body warning. (basic_istream_view::_Iterator::operator++()): Add missing return. 2020-02-07 Patrick Palka * include/bits/ranges_algo.h: Remove extraneous &&. * include/std/ranges (ranges::__detail::__stream_extractable, ranges::basic_istream_view, ranges::istream_view): Define. * testsuite/std/ranges/istream_view: New test. Implement C++20 range adaptors * include/std/ranges: Include and . (subrange::_S_store_size): Mark as const instead of constexpr to avoid what seems to be a bug in GCC. (__detail::__box): Give it defaulted copy and move constructors. (ranges::views::_Single::operator()): Mark constexpr. (ranges::views::_Iota::operator()): Mark constexpr. (__detail::Empty): Define. (ranges::views::__closure::_RangeAdaptor, ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view, ranges::views::all, ranges::__detail::find_if, ranges::__detail::find_if_not, ranges::__detail::mismatch, ranges::detail::min, filter_view, ranges::views::filter, transform_view, ranges::views::transform, take_view, ranges::views::take, take_while_view, ranges::views::take_while, drop_view, ranges::views::drop, join_view, ranges::views::join, __detail::require_constant, __detail::tiny_range, split_view, ranges::views::split, ranges::views::_Counted, ranges::views::counted, common_view, ranges::views::common, reverse_view, ranges::views::reverse, ranges::views::__detail::__is_reversible_subrange, ranges::views::__detail::__is_reverse_view, reverse_view, ranges::views::reverse, __detail::__has_tuple_element, elements_view, ranges::views::elements, ranges::views::keys, ranges::views::values): Define. (views): Alias for ranges::views. (tuple_size>, tuple_element<0, ranges::subrange>, tuple_element<1, ranges::subrange>): New partial specializations. * testsuite/std/ranges/adaptors/all.cc: New test. * testsuite/std/ranges/adaptors/common.cc: Likewise. * testsuite/std/ranges/adaptors/counted.cc: Likewise. * testsuite/std/ranges/adaptors/drop.cc: Likewise. * testsuite/std/ranges/adaptors/drop_while.cc: Likewise. * testsuite/std/ranges/adaptors/elements.cc: Likewise. * testsuite/std/ranges/adaptors/filter.cc: Likewise. * testsuite/std/ranges/adaptors/join.cc: Likewise. * testsuite/std/ranges/adaptors/reverse.cc: Likewise. * testsuite/std/ranges/adaptors/split.cc: Likewise. * testsuite/std/ranges/adaptors/take.cc: Likewise. * testsuite/std/ranges/adaptors/take_while.cc: Likewise. * testsuite/std/ranges/adaptors/transform.cc: Likewise. 2020-02-07 Jonathan Wakely * libsupc++/compare (__cmp_cat::type): Define typedef for underlying type of enumerations and comparison category types. (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type. (__cmp_cat::_Ncmp::unordered): Change value to 2. (partial_ordering::_M_value, weak_ordering::_M_value) (strong_ordering::_M_value): Change type to __cmp_cat::type. (partial_ordering::_M_is_ordered): Remove data member. (partial_ordering): Use second bit of _M_value for unordered. Adjust comparison operators. (weak_ordering::operator partial_ordering): Simplify to remove branches. (operator<=>(unspecified, weak_ordering)): Likewise. (strong_ordering::operator partial_ordering): Likewise. (strong_ordering::operator weak_ordering): Likewise. (operator<=>(unspecified, strong_ordering)): Likewise. * testsuite/18_support/comparisons/categories/partialord.cc: New test. * testsuite/18_support/comparisons/categories/strongord.cc: New test. * testsuite/18_support/comparisons/categories/weakord.cc: New test. * include/std/ranges (iota_view::_Iterator): Fix typo in name of __cpp_lib_three_way_comparison macro and use deduced return type for operator<=>. * testsuite/std/ranges/iota/iterator.cc: New test. 2020-02-07 Patrick Palka Jonathan Wakely Implement C++20 constrained algorithms * include/Makefile.am: Add new header. * include/Makefile.in: Regenerate. * include/std/algorithm: Include . * include/bits/ranges_algo.h: New file. * testsuite/25_algorithms/adjacent_find/constrained.cc: New test. * testsuite/25_algorithms/all_of/constrained.cc: New test. * testsuite/25_algorithms/any_of/constrained.cc: New test. * testsuite/25_algorithms/binary_search/constrained.cc: New test. * testsuite/25_algorithms/copy/constrained.cc: New test. * testsuite/25_algorithms/copy_backward/constrained.cc: New test. * testsuite/25_algorithms/copy_if/constrained.cc: New test. * testsuite/25_algorithms/copy_n/constrained.cc: New test. * testsuite/25_algorithms/count/constrained.cc: New test. * testsuite/25_algorithms/count_if/constrained.cc: New test. * testsuite/25_algorithms/equal/constrained.cc: New test. * testsuite/25_algorithms/equal_range/constrained.cc: New test. * testsuite/25_algorithms/fill/constrained.cc: New test. * testsuite/25_algorithms/fill_n/constrained.cc: New test. * testsuite/25_algorithms/find/constrained.cc: New test. * testsuite/25_algorithms/find_end/constrained.cc: New test. * testsuite/25_algorithms/find_first_of/constrained.cc: New test. * testsuite/25_algorithms/find_if/constrained.cc: New test. * testsuite/25_algorithms/find_if_not/constrained.cc: New test. * testsuite/25_algorithms/for_each/constrained.cc: New test. * testsuite/25_algorithms/generate/constrained.cc: New test. * testsuite/25_algorithms/generate_n/constrained.cc: New test. * testsuite/25_algorithms/heap/constrained.cc: New test. * testsuite/25_algorithms/includes/constrained.cc: New test. * testsuite/25_algorithms/inplace_merge/constrained.cc: New test. * testsuite/25_algorithms/is_partitioned/constrained.cc: New test. * testsuite/25_algorithms/is_permutation/constrained.cc: New test. * testsuite/25_algorithms/is_sorted/constrained.cc: New test. * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test. * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New test. * testsuite/25_algorithms/lower_bound/constrained.cc: New test. * testsuite/25_algorithms/max/constrained.cc: New test. * testsuite/25_algorithms/max_element/constrained.cc: New test. * testsuite/25_algorithms/merge/constrained.cc: New test. * testsuite/25_algorithms/min/constrained.cc: New test. * testsuite/25_algorithms/min_element/constrained.cc: New test. * testsuite/25_algorithms/minmax/constrained.cc: New test. * testsuite/25_algorithms/minmax_element/constrained.cc: New test. * testsuite/25_algorithms/mismatch/constrained.cc: New test. * testsuite/25_algorithms/move/constrained.cc: New test. * testsuite/25_algorithms/move_backward/constrained.cc: New test. * testsuite/25_algorithms/next_permutation/constrained.cc: New test. * testsuite/25_algorithms/none_of/constrained.cc: New test. * testsuite/25_algorithms/nth_element/constrained.cc: New test. * testsuite/25_algorithms/partial_sort/constrained.cc: New test. * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test. * testsuite/25_algorithms/partition/constrained.cc: New test. * testsuite/25_algorithms/partition_copy/constrained.cc: New test. * testsuite/25_algorithms/partition_point/constrained.cc: New test. * testsuite/25_algorithms/prev_permutation/constrained.cc: New test. * testsuite/25_algorithms/remove/constrained.cc: New test. * testsuite/25_algorithms/remove_copy/constrained.cc: New test. * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test. * testsuite/25_algorithms/remove_if/constrained.cc: New test. * testsuite/25_algorithms/replace/constrained.cc: New test. * testsuite/25_algorithms/replace_copy/constrained.cc: New test. * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test. * testsuite/25_algorithms/replace_if/constrained.cc: New test. * testsuite/25_algorithms/reverse/constrained.cc: New test. * testsuite/25_algorithms/reverse_copy/constrained.cc: New test. * testsuite/25_algorithms/rotate/constrained.cc: New test. * testsuite/25_algorithms/rotate_copy/constrained.cc: New test. * testsuite/25_algorithms/search/constrained.cc: New test. * testsuite/25_algorithms/search_n/constrained.cc: New test. * testsuite/25_algorithms/set_difference/constrained.cc: New test. * testsuite/25_algorithms/set_intersection/constrained.cc: New test. * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New test. * testsuite/25_algorithms/set_union/constrained.cc: New test. * testsuite/25_algorithms/shuffle/constrained.cc: New test. * testsuite/25_algorithms/sort/constrained.cc: New test. * testsuite/25_algorithms/stable_partition/constrained.cc: New test. * testsuite/25_algorithms/stable_sort/constrained.cc: New test. * testsuite/25_algorithms/swap_ranges/constrained.cc: New test. * testsuite/25_algorithms/transform/constrained.cc: New test. * testsuite/25_algorithms/unique/constrained.cc: New test. * testsuite/25_algorithms/unique_copy/constrained.cc: New test. * testsuite/25_algorithms/upper_bound/constrained.cc: New test. 2020-02-06 Jonathan Wakely * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR number in comment. Fix indentation. * include/bits/stl_algobase.h (__iter_swap, __iter_swap): Remove redundant _GLIBCXX20_CONSTEXPR. * include/std/ranges (viewable_range): Replace decay_t with remove_cvref_t (LWG 3375). 2020-02-05 Jonathan Wakely * include/bits/iterator_concepts.h (iter_reference_t) (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t): Remove workarounds for PR c++/67704. * testsuite/24_iterators/aliases.cc: New test. 2020-02-05 Patrick Palka * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i when initializing _M_current. (move_iterator::base): Split into two overloads differing in ref-qualifiers as in P1207R4 for C++20. 2020-02-04 Jonathan Wakely * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after use. PR libstdc++/93562 * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define. (unique_ptr::swap, unique_ptr::swap): Call it. * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test. 2020-02-01 Andrew Burgess * configure: Regenerate. 2020-01-31 Patrick Palka * testsuite/24_iterators/range_operations/distance.cc: Do not assume test_range::end() returns the same type as test_range::begin(). * testsuite/24_iterators/range_operations/next.cc: Likewise. * testsuite/24_iterators/range_operations/prev.cc: Likewise. * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end): Always return a sentinel. 2020-01-29 Jonathan Wakely PR libstdc++/92895 * include/std/stop_token (stop_token::stop_possible()): Call new _M_stop_possible() function. (stop_token::stop_requested()): Do not use stop_possible(). (stop_token::binary_semaphore): New class, as temporary stand-in for std::binary_semaphore. (stop_token::_Stop_cb::_M_callback): Add noexcept to type. (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done): New data members for symchronization with stop_callback destruction. (stop_token::_Stop_cb::_Stop_cb): Make non-template. (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute): Remove. (stop_token::_Stop_cb::_M_run): New member function. (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx): Remove. (stop_token::_Stop_state::_M_owners): New data member to track reference count for ownership. (stop_token::_Stop_state::_M_value): New data member combining a spinlock, the stop requested flag, and the reference count for associated stop_source objects. (stop_token::_Stop_state::_M_requester): New data member for synchronization with stop_callback destruction. (stop_token::_Stop_state::_M_stop_possible()): New member function. (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit of _M_value. (stop_token::_Stop_state::_M_add_owner) (stop_token::_Stop_state::_M_release_ownership) (stop_token::_Stop_state::_M_add_ssrc) (stop_token::_Stop_state::_M_sub_ssrc): New member functions for updating reference counts. (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock) (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock) (stop_token::_Stop_state::_M_try_lock) (stop_token::_Stop_state::_M_try_lock_and_stop) (stop_token::_Stop_state::_M_do_try_lock): New member functions for managing spinlock. (stop_token::_Stop_state::_M_request_stop): Use atomic operations to read and update state. Release lock while running callbacks. Use new data members to synchronize with callback destruction. (stop_token::_Stop_state::_M_remove_callback): Likewise. (stop_token::_Stop_state::_M_register_callback): Use atomic operations to read and update state. (stop_token::_Stop_state_ref): Handle type to manage _Stop_state, replacing shared_ptr. (stop_source::stop_source(const stop_source&)): Update reference count. (stop_source::operator=(const stop_source&)): Likewise. (stop_source::~stop_source()): Likewise. (stop_source::stop_source(stop_source&&)): Define as defaulted. (stop_source::operator=(stop_source&&)): Establish postcondition on parameter. (stop_callback): Enforce preconditions on template parameter. Replace base class with data member of new _Cb_impl type. (stop_callback::stop_callback(const stop_token&, Cb&&)) (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race. (stop_callback::_Cb_impl): New type wrapping _Callback member and defining the _S_execute member function. * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New test. * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test. * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test. * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc: New test. * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New test. * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test. * testsuite/30_threads/stop_token/stop_source/assign.cc: New test. * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New test. * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use three_way_comparable_with. (__detail::__3way_cmp_with): Remove workaround for fixed bug. (compare_three_way::operator()): Remove redundant constraint from requires-clause. (__detail::_Synth3way::operator()): Use three_way_comparable_with instead of workaround. * testsuite/18_support/comparisons/object/93479.cc: Prune extra output due to simplified constraints on compare_three_way::operator(). PR libstdc++/93479 * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid. * testsuite/18_support/comparisons/object/93479.cc: New test. * testsuite/std/ranges/access/end.cc: Do not assume test_range::end() returns the same type as test_range::begin(). Add comments. * testsuite/std/ranges/access/rbegin.cc: Likewise. * testsuite/std/ranges/access/rend.cc: Likewise. * testsuite/std/ranges/range.cc: Do not assume the sentinel for test_range is the same as its iterator type. * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add operator- overloads to satisfy sized_sentinel_for when the iterator satisfies random_access_iterator. 2020-01-28 Jonathan Wakely PR libstdc++/93470 * include/bits/refwrap.h (reference_wrapper::operator()): Restrict static assertion to object types. PR libstdc++/93325 * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for clock_gettime instead of explicit glibc version check. * configure: Regenerate. 2020-01-28 Martin Liska PR libstdc++/93478 * include/std/atomic: Fix typo. * include/std/optional: Likewise. 2020-01-27 Andrew Burgess * configure: Regenerate. 2020-01-27 Jonathan Wakely PR libstdc++/93426 * include/std/span (span): Fix deduction guide. * testsuite/23_containers/span/deduction.cc: New test. 2020-01-24 Jonathan Wakely * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type. (__cmp_cat::_Ord::equivalent): Add enumerator. (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less and greater. (partial_ordering, weak_ordering, strong_ordering): Remove constructors taking __cmp_cat::_Eq parameters. Use renamed enumerators. 2020-01-24 Maciej W. Rozycki * acinclude.m4: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * doc/Makefile.in: Regenerate. * include/Makefile.in: Regenerate. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++17/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. 2020-01-23 Alexandre Oliva * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros. * configure: Rebuild. * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t. 2020-01-23 Jonathan Wakely PR libstdc++/91947 * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify rule. * include/Makefile.in: Regenerate. 2020-01-20 Jonathan Wakely * doc/xml/faq.xml: Fix grammar. * doc/xml/manual/appendix_contributing.xml: Improve instructions. * doc/xml/manual/spine.xml: Update copyright years. * doc/html/*: Regenerate. 2020-01-19 Eric S. Raymond * doc/xml/faq.xml: Update for SVN -> Git transition. * doc/xml/manual/appendix_contributing.xml: Likewise. * doc/xml/manual/status_cxx1998.xml: Likewise. * doc/xml/manual/status_cxx2011.xml: Likewise. * doc/xml/manual/status_cxx2014.xml: Likewise. * doc/xml/manual/status_cxx2017.xml: Likewise. * doc/xml/manual/status_cxx2020.xml: Likewise. * doc/xml/manual/status_cxxtr1.xml: Likewise. * doc/xml/manual/status_cxxtr24733.xml: Likewise. 2020-01-18 Iain Sandoe * include/Makefile.am: Add coroutine to the std set. * include/Makefile.in: Regenerated. * include/std/coroutine: New file. 2020-01-17 Jonathan Wakely PR libstdc++/92376 * include/bits/c++config: Only do PSTL config when the header is present, to fix freestanding. * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation functions if they were detected by configure. 2020-01-16 Kai-Uwe Eckhardt Matthew Bauer Jonathan Wakely PR bootstrap/64271 (partial) * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type to unsigned short. (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit) (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync definitions with NetBSD upstream. (ctype_base::blank): Use _CTYPE_BL. * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove Declaration. (ctype::classic_table): Use _C_ctype_tab_ instead of _C_ctype_. (ctype::do_toupper, ctype::do_tolower): Cast char parameters to unsigned char. * config/os/bsd/netbsd/ctype_inline.h (ctype::is): Likewise. 2020-01-16 François Dumont PR libstdc++/91263 * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend. * include/bits/hashtable_policy.h: Include . (_Equality_base): Remove. (_Equality<>::_M_equal): Review implementation. Use std::is_permutation. * testsuite/23_containers/unordered_multiset/operators/1.cc (Hash, Equal, test02, test03): New. * testsuite/23_containers/unordered_set/operators/1.cc (Hash, Equal, test02, test03): New. 2020-01-15 Jonathan Wakely PR libstdc++/93267 * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type): Move here from and define using __int128 when available. (__is_integer_like, __is_signed_integer_like): Move here from . (weakly_incrementable): Use __is_signed_integer_like. * include/bits/range_access.h (__max_diff_type, __max_size_type) (__is_integer_like, __is_signed_integer_like): Move to . (__make_unsigned_like_t): Move here from . * include/std/ranges (__make_unsigned_like_t): Move to . (iota_view): Replace using-directive with using-declarations. * testsuite/std/ranges/iota/93267.cc: New test. * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory. 2020-01-13 Jonathan Wakely PR libstdc++/93244 * include/bits/fs_path.h (path::generic_string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash. * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check root-dir is converted to forward slash in generic pathname. * testsuite/27_io/filesystem/path/generic/utf.cc: New test. * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test. PR libstdc++/58605 * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization): Define. (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>) (__atomic_float): Add default member initializer for C++20. * include/std/atomic (atomic): Likewise. (atomic::atomic()): Remove noexcept-specifier on default constructor. * include/std/version (__cpp_lib_atomic_value_initialization): Define. * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line number. * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise. * testsuite/29_atomics/atomic/cons/value_init.cc: New test. * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test. * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust expected result for is_trivially_default_constructible. * testsuite/29_atomics/atomic_float/requirements.cc: Likewise. * testsuite/29_atomics/atomic_float/value_init.cc: New test. * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise. * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise. * testsuite/29_atomics/atomic_integral/cons/value_init.cc * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust expected results for is_trivially_default_constructible. * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add new test generator. 2020-01-10 Jonathan Wakely * testsuite/util/testsuite_iterators.h: Improve comment. * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11 initialization syntax. PR libstdc++/92285 * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type of base class independent of __cplusplus value. [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the type defined in the base class * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test. * testsuite/24_iterators/istreambuf_iterator/requirements/ base_classes.cc: Adjust expected base class for C++98. 2020-01-09 Olivier Hainque * doc/xml/manual/appendix_contributing.xml: Document _C2 as a reserved identifier, by VxWorks. * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2. * include/bits/stl_multimap.h: Likewise. 2020-01-09 Jonathan Wakely * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==) (_ExtPtr_allocator::operator!=): Add missing const qualifiers. * include/ext/pointer.h (readable_traits<_Pointer_adapter>): Add partial specialization to disambiguate the two constrained specializations. * include/experimental/type_traits (experimental::is_pod_v): Disable -Wdeprecated-declarations warnings around reference to std::is_pod. * include/std/type_traits (is_pod_v): Likewise. * testsuite/18_support/max_align_t/requirements/2.cc: Also check is_standard_layout and is_trivial. Do not check is_pod for C++20. * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc: Add -Wno-deprecated for C++20. * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise. * testsuite/20_util/is_pod/value.cc: Likewise. * testsuite/experimental/type_traits/value.cc: Likewise. 2020-01-09 JeanHeyd "ThePhD" Meneide * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro. * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20. * testuite/20_util/is_pod/deprecated-2a.cc: New test. 2020-01-09 Jonathan Wakely PR libstdc++/93205 * include/bits/random.h (operator>>): Check stream operation succeeds. * include/bits/random.tcc (operator<<): Remove redundant __ostream_type typedefs. (operator>>): Remove redundant __istream_type typedefs. Check stream operations succeed. (__extract_params): New function to fill a vector from a stream. * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line. PR libstdc++/93208 * config/abi/pre/gnu.ver: Add new exports. * include/std/memory_resource (memory_resource::~memory_resource()): Do not define inline. (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise. * src/c++17/memory_resource.cc (memory_resource::~memory_resource()): Define. (monotonic_buffer_resource::~monotonic_buffer_resource()): Define. * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test. 2020-01-09 François Dumont PR libstdc++/92124 * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New template alias. (_Hashtable<>::__fwd_value_for): New. (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template parameter. (_Hashtable<>::_M_assign<>): Add _Ht template parameter. (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt. (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept with std::move. (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt. (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)): Adapt. (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)): Adapt. * testsuite/23_containers/unordered_set/92124.cc: New. 2020-01-08 Jonathan Wakely PR libstdc++/93201 * src/c++17/fs_ops.cc (do_remove_all): New function implementing more detailed error reporting for remove_all. Check result of recursive call before incrementing iterator. (remove_all(const path&), remove_all(const path&, error_code&)): Use do_remove_all. * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check result of recursive call before incrementing iterator. * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors are reported correctly. * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise. 2020-01-07 Thomas Rodgers * include/std/condition_variable (condition_variable_any::wait_on): Rename to match current draft standard. (condition_variable_any::wait_on_until): Likewise. (condition_variable_any::wait_on_for): Likewise. * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc: Adjust tests to account for renamed methods. 2020-01-07 François Dumont PR libstdc++/92124 * include/bits/stl_tree.h (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace std::move_if_noexcept by std::move. * testsuite/23_containers/map/92124.cc: New. * testsuite/23_containers/set/92124.cc: New. 2020-01-06 Jonathan Wakely * include/std/stop_token (stop_token): Remove operator!= (LWG 3254). (stop_source): Likewise (LWG 3362). * testsuite/30_threads/stop_token/stop_source.cc: Test equality comparisons. * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp) (lexicographical_compare_three_way): Do not depend on __cpp_lib_concepts. * include/std/version (__cpp_lib_three_way_comparison): Only define when __cpp_lib_concepts is defined. * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise. 2020-01-03 Jonathan Wakely * include/bits/stl_algobase.h (lexicographical_compare_three_way): Only define four-argument overload when __cpp_lib_concepts is defined. 2020-01-01 John David Anglin * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update. 2020-01-01 Jakub Jelinek Update copyright years. Copyright (C) 2020 Free Software Foundation, Inc. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.