https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105452
Bug ID: 105452
Summary: static_assert inside nameless nested union: invalid
"inaccessible within this context" error
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: foobarandfoo at gmail dot com
Target Milestone: ---
template <typename T>
struct C {
union {
char v;
static_assert(sizeof(v) == sizeof(char), "");
};
};
int main() {
C<int> x;
}
Fails to compile in every version I tried (including 13.0, 11.3.0, 11.2.0,
11.1.0, 10.3, 9.4) with "error: ‘char C<int>::<unnamed struct>::v’ is
inaccessible within this context static_assert(sizeof(v) == sizeof(char),
"");". If we modify struct C to be non-templated, the code compiles
successfully. Clang and MSVC compile the initial code.
https://godbolt.org/z/j171x1aGz
