https://gcc.gnu.org/g:d03c58584da3c440cc9103d6a69f6c36f16f6e97
commit r14-11696-gd03c58584da3c440cc9103d6a69f6c36f16f6e97
Author: Patrick Palka <ppa...@redhat.com>
Date: Wed Feb 26 14:51:38 2025 -0500
libstdc++: Add code comment documenting LWG 4027 change [PR118083]
PR libstdc++/118083
libstdc++-v3/ChangeLog:
* include/bits/ranges_base.h
(ranges::__access::__possibly_const_range): Mention LWG 4027.
(cherry picked from commit 640697f7c2def415db81c84010ae25be0785d867)
Diff:
---
libstdc++-v3/include/bits/ranges_base.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libstdc++-v3/include/bits/ranges_base.h
b/libstdc++-v3/include/bits/ranges_base.h
index 481d9bb5c5d5..eafd982f48e2 100644
--- a/libstdc++-v3/include/bits/ranges_base.h
+++ b/libstdc++-v3/include/bits/ranges_base.h
@@ -635,6 +635,8 @@ namespace ranges
constexpr auto&
__possibly_const_range(_Range& __r) noexcept
{
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 4027. possibly-const-range should prefer returning const R&
if constexpr (input_range<const _Range>)
return const_cast<const _Range&>(__r);
else
