Fix Clang warnings in STL headers (when they aren't being suppressed for "system headers").
Change the test infrastructure to no longer treat STL headers as "system headers", so we'll remain clean with respect to Clang warnings in the future.
Fix Microsoft-internal VSO-609129 "`<cvt/sjis_0208>` appears to have impossible condition" which was also emitting a Clang warning.
* Update to Clang 10 and Visual Studio 2019 version 16.6p2
* re-clang-formats the tree to comply with new clang 10 clang-format
* updates our agents to F series VMs which are faster and cheaper for our build workloads
* defaults scale set to 0 VMs and lets the Azure Pipelines service control all resizing
* fix tests to pass with the new compilers
Co-authored by Casey Carter and Curtis Bezault
* Implements a selection of support machinery in `std::ranges` and adds the `<ranges>` header. Primarily consists of the range access customization point objects:
* `ranges::begin`
* `ranges::end`
* `ranges::cbegin`
* `ranges::cend`
* `ranges::rbegin`
* `ranges::rend`
* `ranges::crbegin`
* `ranges::crend`
* `ranges::size`
* `ranges::empty`
* `ranges::data`
* `ranges::cdata`
and range concepts:
* `ranges::range`
* `ranges::output_range`
* `ranges::input_range`
* `ranges::forward_range`
* `ranges::bidirectional_range`
* `ranges::random_access_range`
* `ranges::contiguous_range`
* `ranges::sized_range`
* `ranges::view`
* `ranges::common_range`
and the associated type aliases:
* `ranges::iterator_t`
* `ranges::sentinel_t`
* `ranges::range_value_t`
* `ranges::range_reference_t`
* `ranges::range_difference_t`
* `ranges::range_rvalue_reference_t`
* Adds `<ranges>` - which is mostly empty since the support machinery is defined in `<xutility>` so as to be visible to `<algorithm>`
* Annotates [P0896R4](https://wg21.link/p0896r4) as partially implemented in the "`_HAS_CXX20` directly controls" section of `<yvals_core.h>`.
* Touches `<regex>`, `<set>`, and `<unordered_set>` to add partial specializations of `ranges::enable_view` for `match_results` and `(unordered_)?multi?set` as mandated by the WD to override the heuristic.
* Partially implements [P1474R1 "Helpful pointers for `ContiguousIterator`"](https://wg21.link/p1474r1):
* Push `pointer_traits` from `<xmemory>` and `to_address` from `<memory>` up into `<xutility>`
* Add `to_address` expression requirement to `contiguous_iterator` concept, and update `P0896R4_ranges_iterator_machinery` appropriately
* Implement the changes to `ranges::data` (but not `view_interface` since it isn't yet implemented)
* Drive-by:
* Simplify the definition of `pointer_traits::_Reftype` by eschewing `add_lvalue_reference_t`.
* Strengthen `reverse_iterator`'s constructors and `make_reverse_iterator` so `ranges::rbegin` and `ranges::rend` can be `noexcept` in more cases
* Since we're using `_Rng` as the template parameter name for models of `std::ranges::range`, rename a local variable `_Rng` to `_Generator` in `<random>`
Stephan T. Lavavej
Curtis J Bezault
Abhishek Bhattacharya
Billy O'Neal
Joyce Er
Jean Philippe
Michael Schellenberger Costa
S. B. Tam
Krystyna Lopez
Casey Carter