*/
template <class Key, class Val>
class Cache : private QCache<Key, Val> {
-#if !(defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ == 6))
static_assert(std::is_copy_constructible<Val>::value,
"lyx::Cache only stores copyable objects!");
static_assert(std::is_default_constructible<Val>::value,
"lyx::Cache only stores default-constructible objects!");
using Q = QCache<Key, Val>;
-#else
- typedef QCache<Key, Val> Q;
-#endif
public:
///