commit e3a7197779e1d544b9b56c6aa6346647fdbecb68
author Martin Storsjö <martin@martin.st> Mon Oct 26 13:18:46 2020 +0200
committer Copybara-Service <copybara-worker@google.com> Fri Dec 04 01:49:35 2020 -0800
tree 7acbde1c3b2d8746edebaaf8d40aa6f8e420c9a5
parent 2422fa25011bd289e26e1b7f46ad04714ca9d45d

[libcxx] Implement c++2a char8_t input/output of std::filesystem::path

This implements the std::filesystem parts of P0482 (which is already
marked as in progress), and applies the actions that are suggested
in P1423.

Differential Revision: https://reviews.llvm.org/D90222

GitOrigin-RevId: 6be11e35d5397ae1c117eb840a969585fdd7d08d

docs/Cxx2aStatusPaperStatus.csv

diff --git a/docs/Cxx2aStatusPaperStatus.csv b/docs/Cxx2aStatusPaperStatus.csv
index 88d5641..ac2c093 100644
--- a/docs/Cxx2aStatusPaperStatus.csv
+++ b/docs/Cxx2aStatusPaperStatus.csv
@@ -115,7 +115,7 @@
 "`P1208 <https://wg21.link/P1208>`__","LWG","Adopt source_location for C++20","Cologne","",""
 "`P1355 <https://wg21.link/P1355>`__","LWG","Exposing a narrow contract for ceil2","Cologne","|Complete|","9.0"
 "`P1361 <https://wg21.link/P1361>`__","LWG","Integration of chrono with text formatting","Cologne","",""
-"`P1423 <https://wg21.link/P1423>`__","LWG","char8_t backward compatibility remediation","Cologne","",""
+"`P1423 <https://wg21.link/P1423>`__","LWG","char8_t backward compatibility remediation","Cologne","|In Progress|",""
 "`P1424 <https://wg21.link/P1424>`__","LWG","'constexpr' feature macro concerns","Cologne","Superseded by `P1902 <https://wg21.link/P1902>`__",""
 "`P1466 <https://wg21.link/P1466>`__","LWG","Miscellaneous minor fixes for chrono","Cologne","",""
 "`P1474 <https://wg21.link/P1474>`__","LWG","Helpful pointers for ContiguousIterator","Cologne","",""

docs/ReleaseNotes.rst

diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 719115f..8ce9b29 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -56,3 +56,9 @@
   - ``ceil2`` has been renamed to ``bit_ceil``
   - ``floor2`` has been renamed to ``bit_floor``
   - ``log2p1`` has been renamed to ``bit_width``
+
+- In C++20 mode, ``std::filesystem::path::u8string()`` and
+  ``generic_u8string()`` now return ``std::u8string`` according to P0428,
+  while they return ``std::string`` in C++17. This can cause source
+  incompatibility, which is discussed and acknowledged in P1423, but that
+  paper doesn't suggest any remediation for this incompatibility.