Hi Jonathan,
Thanks for the quick answer. No, it doesn't for the simplest possible case:
#include <tuple>
int main() { std::array<int,1> arr; };
But admittedly that would have been a surprise to me as I usually
compile with -Wall -Wextra -Werror.
But I tried to replace `<array>` with `<tuple>` in yet another code
(tiny but real-life, so not as trivial as above) with two appearances of
`std::array` and there, one does yield the note.
I boiled it down to the following: The typename seems to not yield the
note but the constructor does notify, i.e. in
1 std::array<int,1> f() {
2 return std::array<int,1>{{1}};
3 }
Line 1 and 2 raise an error but only Line 2 comes with a note.
Best,
Julian
On 05/08/2022 17:55, Jonathan Wakely wrote:
On Fri, 5 Aug 2022 at 17:39, Julian Lenz via Gcc <gcc@gcc.gnu.org> wrote:
Hi everybody,
TL;DR:
What is the reason that `error: '<some class>' has incomplete type` does
not give a note about where the forward declaration happened for
standard library classes?
Probably because the declaration happens in a system header.
Does -Wsystem-headers change it?
