[libcxx-commits] [PATCH] D103101: [libc++] Add _LIBCPP_ABI_NO_ITERATOR_BASES. Fix input/output iterators' difference_type for C++20.

[Arthur O'Dwyer via Phabricator via libcxx-commits]

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This makes `ostream_iterator` and `ostreambuf_iterator` conforming to C++20, I think. (They needed to be default-constructible. But p2325 <https://wg21.link/p2325> will remove the default constructor again, as a DR against C++20, when it lands.)

Supersedes D101729 <https://reviews.llvm.org/D101729>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103101

Files:
  libcxx/include/__config
  libcxx/include/__memory/raw_storage_iterator.h
  libcxx/include/iterator
  libcxx/test/std/iterators/iterator.primitives/iterator.traits/cxx20_iterator_traits.compile.pass.cpp
  libcxx/test/std/iterators/predef.iterators/insert.iterators/back.insert.iterator/types.pass.cpp
  libcxx/test/std/iterators/predef.iterators/insert.iterators/front.insert.iterator/types.pass.cpp
  libcxx/test/std/iterators/predef.iterators/insert.iterators/insert.iterator/types.pass.cpp
  libcxx/test/std/iterators/stream.iterators/ostream.iterator/iterator_concept_conformance.compile.pass.cpp
  libcxx/test/std/iterators/stream.iterators/ostream.iterator/ostream.iterator.cons.des/default.pass.cpp
  libcxx/test/std/iterators/stream.iterators/ostreambuf.iterator/iterator_concept_conformance.compile.pass.cpp
  libcxx/test/std/iterators/stream.iterators/ostreambuf.iterator/ostreambuf.iter.cons/default.pass.cpp

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