[libcxx-commits] [PATCH] D133317: implement `std::views::istream`

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implement `std::ranges::basic_istream_view` and `std::views::istream`. Although the view itself is constexpr,
the constructor argument is a base class std::istream where its ctor/dtor are not constexpr. So no tests are performed in
constexpr


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133317

Files:
  libcxx/docs/Status/Cxx20Issues.csv
  libcxx/docs/Status/Cxx20Papers.csv
  libcxx/docs/Status/Cxx2bIssues.csv
  libcxx/docs/Status/RangesIssues.csv
  libcxx/include/CMakeLists.txt
  libcxx/include/__ranges/istream_view.h
  libcxx/include/module.modulemap.in
  libcxx/include/ranges
  libcxx/test/libcxx/private_headers.verify.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/begin.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/cpo.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/ctor.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/end.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/general.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/iterator/compare.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/iterator/ctor.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/iterator/deref.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/iterator/increment.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/iterator/member_types.compile.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/iterator/special_op.pass.cpp
  libcxx/test/std/ranges/range.factories/range.istream.view/range.concept.compile.pass.cpp

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