https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97569
Bug ID: 97569
Summary: Declaring a struct in a field declaration of another
struct.
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: anders.granlund.0 at gmail dot com
Target Milestone: ---
Consider the following c++ program:
int main()
{
struct A
{
struct B *b;
};
using U = B;
}
Compile it with "-std=c++20 -pedantic-errors".
The gcc compiler accepts it.
Clang however rejects it with the following error
message: "unknown type name 'B': using U = B;".
The interesting thing is that if we replace struct S with struct S {} both
compilers agree on rejecting the program.
I'm not sure if this is a bug in gcc or clang, but I think this is a gcc bug.
