[all-commits] [llvm/llvm-project] a72ab9: [libc++][span] P2821R5: `span.at()` (#74994)

[Hristo Hristov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a72ab9c14d604ae857acad5ed7d6b5be6914c619
      https://github.com/llvm/llvm-project/commit/a72ab9c14d604ae857acad5ed7d6b5be6914c619
  Author: Hristo Hristov <hristo.goshev.hristov at gmail.com>
  Date:   2024-01-05 (Fri, 05 Jan 2024)

  Changed paths:
    M libcxx/docs/FeatureTestMacroTable.rst
    M libcxx/docs/ReleaseNotes/18.rst
    M libcxx/docs/Status/Cxx2cPapers.csv
    M libcxx/include/span
    M libcxx/include/version
    M libcxx/test/libcxx/transitive_includes/cxx03.csv
    M libcxx/test/libcxx/transitive_includes/cxx11.csv
    M libcxx/test/libcxx/transitive_includes/cxx14.csv
    M libcxx/test/libcxx/transitive_includes/cxx17.csv
    M libcxx/test/libcxx/transitive_includes/cxx20.csv
    M libcxx/test/libcxx/transitive_includes/cxx23.csv
    M libcxx/test/libcxx/transitive_includes/cxx26.csv
    A libcxx/test/std/containers/views/views.span/span.elem/at.pass.cpp
    M libcxx/test/std/containers/views/views.span/span.elem/op_idx.pass.cpp
    M libcxx/test/std/language.support/support.limits/support.limits.general/span.version.compile.pass.cpp
    M libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
    M libcxx/utils/generate_feature_test_macro_components.py

  Log Message:
  -----------
  [libc++][span] P2821R5: `span.at()` (#74994)

- Implements: [P2821R5: span.at()](https://wg21.link/P2821R5)
  (https://eel.is/c++draft/views.contiguous#views.span)
- Cleaned up `span.operator[]` test

---------

Co-authored-by: Zingam <zingam at outlook.com>