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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/112775] Class template partial specialization with
 decltype(n) is wrongly rejected
Date: Sat, 02 Dec 2023 00:28:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112775

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-12-02
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |diagnostic

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. What is interesting is if we don't use -pedantic-errors, the
following is accepted:
```
template <class T, T a, T b>
class A;
template <auto n>
class A<decltype(n), n, n> {};
A<int, 1, 1> b;
```

And even more if we have 2 different values for the 2/3rd arguments, it is
rejected as an incomplete class.=