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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/95322] std::list | take | transform, expression does
 not work cbegin() == end()
Date: Tue, 26 May 2020 13:18:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95322

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There's an implicit conversion from sentinel<false> to sentinel<true>, but =
that
would only happen if the operator=3D=3D had been found, and since it's a hi=
dden
friend it can't be found unless one of the operands is already sentinel<tru=
e>.=