[clang-format] incorrect formatting with & qualifier and requires clause with multi-arg template

[danakj]

The first one has no & qualifier and is formatted correct.

The second one adds & and clang-format gets confused, I don't think it's aware this is a function anymore.

struct S {
    template <class... Args>
    constexpr void f()
        requires(true && C<true, Args...>)
    {
        return;
    }

    template <class... Args>
        constexpr void f() & requires(true && C<true, Args...>) { return; }
};

The const and const& qualifiers are parsed correctly. && is also incorrect.

struct S {
    template <class... Args>
    constexpr void f() const
        requires(true && C<true, Args...>)
    {
        return;
    }

    template <class... Args>
    constexpr void f() const&
        requires(true && C<true, Args...>)
    {
        return;
    }

    template <class... Args>
        constexpr void f() && requires(true && C<true, Args...>) { return; }
};

https://godbolt.org/z/qKTWec96e

[danakj]

It does very wrong things with whatever comes after as well:

struct S {
    template <class... Args>
        constexpr void f() && requires(true && C<true, Args...>) { return; }

        private : int i;
};

[rymiel]

It seems that for this bug to show up, you need both the parentheses after the requires keyword and also a comma (i.e. the one in the angle brackets), like so:
void f() & requires(C<true, true>)
Investigating

[danakj]

That was fast, thank you =)