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From: "hewillk at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/100940] New: views::take and views::drop should not
 define _S_has_simple_extra_args
Date: Mon, 07 Jun 2021 04:39:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100940

            Bug ID: 100940
           Summary: views::take and views::drop should not define
                    _S_has_simple_extra_args
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hewillk at gmail dot com
  Target Milestone: ---

For view::take and views::drop, we need to perfectly forward its incoming a=
rg
in some uncommon situations:

#include <ranges>

struct Five {
  operator int() && { return 5; }
} five;

extern int x[10];
auto r =3D x | std::views::take(five);

https://godbolt.org/z/MEsssWGEh=