Am 13.11.19 um 13:47 schrieb Jonathan Wakely:
> On Wed, 13 Nov 2019 at 11:43, Klaus Doldinger
> <klaus.doldinger64@xxxxxxxxx> wrote:
>>
>>
>>
>> Am 13.11.19 um 11:35 schrieb Jonathan Wakely:
>>> On Wed, 13 Nov 2019 at 09:24, Klaus Doldinger
>>> <klaus.doldinger64@xxxxxxxxx> wrote:
>>>>
>>>> Hi all,
>>>>
>>>> in the follwing example
>>>>
>>>> #include <compare> // omitting trigger ICE
>>>>
>>>> template<auto V>
>>>> struct A {};
>>>>
>>>> struct B {
>>>> inline constexpr auto operator<=>(const B& rhs) const = default;
>>>> private:
>>>> int value; // why must this member be public?
>>>> };
>>>>
>>>> int main() {
>>>> A<B{}> t;
>>>> }
>>>>
>>>> why must the member value be public?
>>>
>>> Looks like a bug, please report it to bugzilla.
>>
Ok, we found this not to be a bug.
But, how do I write a class to use as NTTP with private members?
I'm a bit confused about:
https://en.cppreference.com/w/cpp/language/template_parameters
Here string structural equality does not require all public members.
It must be literal and the members must be structural revursively.
