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From: "eddiejnolan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/83181] [C++17] Invalid deduction guide accepted
Date: Fri, 29 Dec 2023 20:52:04 +0000	[thread overview]
Message-ID: <bug-83181-4-J3r6iJpNoX@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-83181-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83181

Eddie Nolan <eddiejnolan at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eddiejnolan at gmail dot com

--- Comment #3 from Eddie Nolan <eddiejnolan at gmail dot com> ---
Here's another example:

template <typename T, typename U>
struct foo {};

template<typename T, typename U>
foo(T&&) -> foo<T, U>;

Clang says:

<source>:5:1: error: deduction guide template contains a template parameter
that cannot be deduced
    5 | foo(T&&) -> foo<T, U>;
      | ^
<source>:4:31: note: non-deducible template parameter 'U'
    4 | template<typename T, typename U>
      |                               ^

But GCC accepts it.

      parent reply	other threads:[~2023-12-29 20:52 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-83181-4@http.gcc.gnu.org/bugzilla/>
2020-09-16 19:57 ` mpolacek at gcc dot gnu.org
2023-12-29 20:52 ` eddiejnolan at gmail dot com [this message]

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