[all-commits] [llvm/llvm-project] 5e1de2: Revert "[libc++][NFC] Simplify pair a bit" (#97003)

[James Y Knight via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5e1de27f680591a870d78e9952b23f76aed7f456
      https://github.com/llvm/llvm-project/commit/5e1de27f680591a870d78e9952b23f76aed7f456
  Author: James Y Knight <jyknight at google.com>
  Date:   2024-06-28 (Fri, 28 Jun 2024)

  Changed paths:
    M libcxx/include/__utility/pair.h

  Log Message:
  -----------
  Revert "[libc++][NFC] Simplify pair a bit" (#97003)

Reverts llvm/llvm-project#96165

The change broke code like

  #include <utility>
  #include <vector>

  struct Test {
    std::vector<std::pair<int, Test>> v;
  };

  std::pair<int, Test> p;

under `-std=c++20`, apparently by triggering certain template
evaluations too eagerly.



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