[PATCH] D55308: Implement the second part of P0482 (char8_t)

[Marshall Clow via Phabricator]

mclow.lists created this revision.
mclow.lists added reviewers: ldionne, EricWF.
Herald added a subscriber: jfb.

The first part was type_traits and numeric_limits (already committed)
This implements the changes to string/string/view/char_traits

I defined the feature test macro `__cpp_lib_char8_t` even though we don't fully support it (yet) because I want the tests to use it.

Drive-by fixes include fixing the rest of the feature-test macros which were using the never-defined symbol `_TEST_STD_VER`.

There's more to come on P0482, but this is a self-contained chunk.


https://reviews.llvm.org/D55308

Files:
  include/__string
  include/iosfwd
  include/istream
  include/limits
  include/locale
  include/ostream
  include/string
  include/string_view
  include/version
  test/std/language.support/support.limits/support.limits.general/algorithm.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/any.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/array.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/atomic.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/bit.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/charconv.pass.cpp
  test/std/language.support/support.limits/support.limits.general/chrono.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/cmath.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/complex.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/concepts.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/cstddef.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/deque.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/exception.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/execution.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/filesystem.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/forward_list.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/functional.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/iomanip.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/istream.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/iterator.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/limits.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/list.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/locale.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/map.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/memory.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/memory_resource.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/mutex.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/new.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/numeric.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/optional.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/ostream.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/regex.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/scoped_allocator.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/set.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/shared_mutex.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/string.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/string_view.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/tuple.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/type_traits.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/unordered_map.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/unordered_set.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/utility.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/variant.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/vector.version.pass.cpp
  test/std/language.support/support.limits/support.limits.general/version.version.pass.cpp
  test/std/strings/basic.string.hash/enabled_hashes.pass.cpp
  test/std/strings/basic.string.hash/strings.pass.cpp
  test/std/strings/basic.string.literals/literal.pass.cpp
  test/std/strings/basic.string/string.cons/string_view_deduction.pass.cpp
  test/std/strings/basic.string/string.cons/string_view_size_size_deduction.pass.cpp
  test/std/strings/basic.string/string.iterators/iterators.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/assign2.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/assign3.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/compare.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/copy.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/eof.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/eq.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/eq_int_type.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/find.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/length.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/lt.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/move.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/not_eof.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/to_char_type.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/to_int_type.pass.cpp
  test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/types.pass.cpp
  test/std/strings/string.classes/typedefs.pass.cpp
  test/std/strings/string.view/string.view.capacity/capacity.pass.cpp
  test/std/strings/string.view/string.view.cons/assign.pass.cpp
  test/std/strings/string.view/string.view.cons/default.pass.cpp
  test/std/strings/string.view/string.view.cons/from_string.pass.cpp
  test/std/strings/string.view/string.view.hash/enabled_hashes.pass.cpp
  test/std/strings/string.view/string.view.hash/string_view.pass.cpp
  test/std/strings/string.view/string.view.iterators/begin.pass.cpp
  test/std/strings/string.view/string.view.iterators/end.pass.cpp
  test/std/strings/string.view/string.view.iterators/rbegin.pass.cpp
  test/std/strings/string.view/string.view.iterators/rend.pass.cpp
  test/std/strings/string.view/string_view.literals/literal.pass.cpp
  test/std/strings/string.view/types.pass.cpp
  test/std/utilities/meta/meta.unary/meta.unary.cat/is_integral.pass.cpp
  test/support/test_macros.h

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