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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++/96042] Reference type of std::ranges::iota is
 __int128 with -std=c++2a?!
Date: Fri, 03 Jul 2020 11:03:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96042

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Not a bug.

When __STRICT_ANSI__ is defined is_integral_v<__int128> is false and
numeric_limits<__int128> is not specialized.

But that doesn't matter, because the difference type of iota_view does not =
have
to be a standard integer type. __int128 is a valid type for the difference =
type
of iota_view. There is no requirement that is_integral_v<ID> or
numeric_limits<ID>::is_specialized is true for the difference type of
iota_view.=