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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++/109647] ranges:6151:14: error: requires clause
 differs in template redeclaration rejected by clang++ 16.0.2
Date: Thu, 27 Apr 2023 12:10:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109647

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> ---
This is a clang bug.

The primary template on line 5850 has these constraints:

  template<view _Vp>
    requires input_range<_Vp>
  class chunk_view : public view_interface<chunk_view<_Vp>>


But then there is a partial specialization for forward_range on line 6075:

  template<view _Vp>
    requires forward_range<_Vp>
  class chunk_view<_Vp> : public view_interface<chunk_view<_Vp>>

The error on line 6151 incorrectly says that the definition is inconstistent
with line 5850. That's true, but it's a definition for the one on line 6075
instead.=