From: Tomasz Kamiński <tkaminsk@redhat.com>
Date: Fri, 24 Apr 2026 09:13:02 +0000 (+0200)
Subject: libstdc++: Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment for LWG4083.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f3d9afa91c740fe441ede6f9320664a952375d97;p=thirdparty%2Fgcc.git

libstdc++: Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment for LWG4083.

The LWG4083, "views::as_rvalue should reject non-input ranges" is resolved,
as input_range<_Range> is implied by __detail::__can_as_rvalue_view<_Range>.

libstdc++-v3/ChangeLog:

	* include/std/ranges: Add comment for LWG4083.
---

diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
index 4f2082487d1..9c7d639a154 100644
--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -9093,6 +9093,9 @@ namespace views::__adaptor
 	constexpr auto
 	operator() [[nodiscard]] (_Range&& __r) const
 	{
+	  // _GLIBCXX_RESOLVE_LIB_DEFECTS
+	  // 4083. views::as_rvalue should reject non-input ranges
+	  // input_range<_Range> is implied by __detail::__can_as_rvalue_view<_Range>
 	  if constexpr (same_as<range_rvalue_reference_t<_Range>,
 				range_reference_t<_Range>>)
 	    return views::all(std::forward<_Range>(__r));