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From: "davveston at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69348] alias declarations can not be used inside qualifiers
 of declarators
Date: Thu, 03 Dec 2020 11:30:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D69348

David Friberg <davveston at gmail dot com> changed:

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

--- Comment #2 from David Friberg <davveston at gmail dot com> ---
Another similar but more common (/less contrived) example, rejects-valid e.=
g.
for GCC 10.1.0 for all C++ version (-std=3Dc++X with X in {98, 11, 17, 2a/2=
0}).

// https://wandbox.org/permlink/aQpRzgcvAHOihKz5
template<typename T>
struct S {
    using type =3D int;
    type f() const;
};

template<typename T>
using type_t =3D typename S<T>::type;

template <typename T>
type_t<T> S<T>::f() const { }
// error: no declaration matches 'type_t<T> S<T>::f() const'

int main() {}

---

Brought up in
https://stackoverflow.com/questions/65110143/using-typealias-in-place-of-ty=
pedef-defined-in-class-in-definition=