https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102350
--- Comment #16 from Peter Dimov <pdimov at gmail dot com> ---
(In reply to Jakub Jelinek from comment #14)
> But we haven't done that that way and how would headers know if the
> __builtin_source_location that is available is the old or new one?
The header could do
namespace std {
struct __source_location_impl { ... };
class source_location {
using __impl = __source_location_impl;
// ...
};
}
unless the compiler looks specifically for a nested struct, in which case
class source_location {
struct __impl: __source_location_impl {};
// ...
};
