https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109935
--- Comment #5 from Oleksandr Koval ---
Right, my understanding is that it should generate hypothetical constructor
like:
```cpp
template
struct C : public B {
C(B);
};
```
and it doesn't work with braced-initializer list like in this
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109935
--- Comment #4 from Andrew Pinski ---
The same is true even with a depedent field rather than base:
```
template
struct C {
B b;
};
```
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109935
--- Comment #3 from Andrew Pinski ---
C{B{1}};
Does work though.
I suspect the issue is cannot figure out that {1} can be bound to B and
deudce T there and even GCC gives that as a reason:
:7:8: note: candidate: 'template C(B)-> C'
7 |
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109935
--- Comment #2 from Oleksandr Koval ---
According to cppreference, Clang has not implemented CTAD for aggregates at all
so no surprise here. I know that gcc/msvc rejects it but I don't understand
why.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109935
--- Comment #1 from Andrew Pinski ---
MSVC rejects `C{{1}}` for the same reason as GCC.
clang rejects even `B{1}` .
