[all-commits] [llvm/llvm-project] ed962a: [libc++] Implement LWG4023 (#87513)

[Louis Dionne via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ed962a66c5a2257100ca20624521ef51c0abcfb3
      https://github.com/llvm/llvm-project/commit/ed962a66c5a2257100ca20624521ef51c0abcfb3
  Author: Louis Dionne <ldionne.2 at gmail.com>
  Date:   2024-04-25 (Thu, 25 Apr 2024)

  Changed paths:
    M libcxx/docs/Status/Cxx2cIssues.csv
    M libcxx/include/streambuf
    M libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.cons/copy.pass.cpp
    M libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.protected/streambuf.assign/assign.pass.cpp
    M libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.protected/streambuf.assign/swap.pass.cpp
    A libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.protected/streambuf.get.area/setg.assert.pass.cpp
    A libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.protected/streambuf.put.area/setp.assert.pass.cpp

  Log Message:
  -----------
  [libc++] Implement LWG4023 (#87513)

This patch implements LWG4023 by adding explicit assertions for the
added preconditions and also fixes a few tests that were violating these
preconditions.



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