https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111923
--- Comment #13 from Stas Sergeev <stsp at users dot sourceforge.net> ---
Just for the record, Richard Smith
pointed the correct syntax for my
problem, which I would never ever
find myself, and likely no one else
in the world, too:
#include <cstddef>
template <auto O>
struct B {
public:
static constexpr int off = O();
};
#define OFFSET_OF(c, m) \
[]<typename T = c>() constexpr ->int { return offsetof(T, m); }
struct A {
char a;
B<OFFSET_OF(A, b)> b;
};
Works like a magic.
The only addition to the initial
example, is the "typename T = c"
part, but this is what no one would
ever discover.
