From 0dd0905e2f59c1e8fc1597355f47afb53630cfc9 Mon Sep 17 00:00:00 2001 From: Patrick Palka Date: Fri, 21 May 2021 00:05:18 -0400 Subject: [PATCH] libstdc++: Implement LWG 3490 change to drop_while_view::begin() libstdc++-v3/ChangeLog: PR libstdc++/100606 * include/std/ranges (drop_while_view::begin): Assert the precondition added by LWG 3490. (cherry picked from commit 11784fe27d879a10dc8a79212c37f50d4f7146f3) --- libstdc++-v3/include/std/ranges | 1 + 1 file changed, 1 insertion(+) diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges index 3ef352949dff..4e01ef57401a 100644 --- a/libstdc++-v3/include/std/ranges +++ b/libstdc++-v3/include/std/ranges @@ -2389,6 +2389,7 @@ namespace views::__adaptor if (_M_cached_begin._M_has_value()) return _M_cached_begin._M_get(_M_base); + __glibcxx_assert(_M_pred.has_value()); auto __it = __detail::find_if_not(ranges::begin(_M_base), ranges::end(_M_base), std::cref(*_M_pred)); -- 2.47.2