[libcxx-commits] [PATCH] D116950: [libc++] Add the std::ranges::drop range adaptor object

[Louis Dionne via Phabricator via libcxx-commits]

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This introduces forward declarations of `string_view` and `span` to
keep `drop_view.h` as miminal as possible, and to avoid the possibility
of circular dependencies since `span` and `string_view` both depend on
some parts of ranges too. They don't technically depend on `drop_view`
right now, but this is guarding against future headache.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116950

Files:
  libcxx/include/CMakeLists.txt
  libcxx/include/__fwd/span.h
  libcxx/include/__fwd/string_view.h
  libcxx/include/__ranges/drop_view.h
  libcxx/include/module.modulemap
  libcxx/include/span
  libcxx/include/string_view
  libcxx/test/std/ranges/range.adaptors/range.drop/adaptor.pass.cpp

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