[all-commits] [llvm/llvm-project] 962aa2: [libc++] Don't instantiate allocators in __tree on...

[Nikolas Klauser via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 962aa2666fe8aa99e25bb255a99d3ab02d8441b4
      https://github.com/llvm/llvm-project/commit/962aa2666fe8aa99e25bb255a99d3ab02d8441b4
  Author: Nikolas Klauser <nikolasklauser at berlin.de>
  Date:   2025-05-18 (Sun, 18 May 2025)

  Changed paths:
    M libcxx/include/map
    M libcxx/test/std/containers/associative/map/incomplete_type.pass.cpp
    M libcxx/test/support/min_allocator.h

  Log Message:
  -----------
  [libc++] Don't instantiate allocators in __tree on an incomplete type (#140225)

This causes a mismatch between `value_type` and
`allocator_type::value_type` in `__tree`, but I think that's acceptable.
`__tree` primarily gets a `__value_type` wrapper due to potential ABI
breaks and unwraps it to the same as `allocator_type::value_type` in the
end. A cleanup patch will also change `__tree::value_type` to be the
same as `allocator_type::value_type`, making the type mismatch only
visible where `__tree` is instantiated in `map`.



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