[all-commits] [llvm/llvm-project] fc5e0c: [libc++] Simplify most of the segmented iterator o...

[Nikolas Klauser via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fc5e0c071bfba9c8cc86ecff926b84a999970613
      https://github.com/llvm/llvm-project/commit/fc5e0c071bfba9c8cc86ecff926b84a999970613
  Author: Nikolas Klauser <nikolasklauser at berlin.de>
  Date:   2025-11-07 (Fri, 07 Nov 2025)

  Changed paths:
    M libcxx/include/__algorithm/fill.h
    M libcxx/include/__algorithm/fill_n.h
    M libcxx/include/__algorithm/for_each.h
    M libcxx/include/__algorithm/for_each_n.h
    M libcxx/include/__iterator/distance.h
    M libcxx/include/__iterator/segmented_iterator.h

  Log Message:
  -----------
  [libc++] Simplify most of the segmented iterator optimizations (#164797)

This patch does two things.
(1) It replaces SFINAE with `if constexpr`, avoiding some overload
resolution and unnecessary boilerplate.
(2) It removes an overload from `__for_each_n` to forward to
`__for_each`, since `__for_each` doesn't provide any further
optimizations.



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