https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109935
Bug ID: 109935
Summary: CTAD for an aggregate with a dependent base class
doesn't work
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: oleksandr.koval.dev at gmail dot com
Target Milestone: ---
https://godbolt.org/z/s9cM719n3
```cpp
template <typename T>
struct B {
T x;
};
template <typename T>
struct C : public B<T> {
};
void f(){
B{1}; // works as expected
C{{1}}; // error
}
```
Not 100% sure about it but I see no reason for `C{{1}}` not to work. Extra set
of braces is required because B<T> is a dependent base class and brace elision
doesn't work for it (https://eel.is/c++draft/over.match.class.deduct#1.5.1).
