https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83290
Bug ID: 83290
Summary: Expressions in anonymous unions inside class templates
can't reference the union's members
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: abigail.buccaneer at gmail dot com
Target Milestone: ---
The following code compiles fine (with -std=c++14):
struct A {
union {
int x;
char y[sizeof(x)];
decltype(x) z;
static_assert(sizeof(y) == sizeof(z), "");
};
};
But fails when the struct is replaced with a struct template and instantiated
as follows:
template <typename> struct T {
union {
int x;
char y[sizeof(x)];
decltype(x) z;
static_assert(sizeof(y) == sizeof(z), "");
};
};
template struct T<void>;
The errors all say essentially the same thing:
<source>:13:23: error: 'int T<void>::<unnamed union>::x' is
inaccessible within this context
char y[sizeof(x)];
~^~
