Ah, interesting. Apparently this is true even if some constructors are explicitly '= default' (for the T x{} and T x={} list/aggregate initialization cases only

Ah, interesting. Apparently this is true even if some constructors are explicitly '= default' (for the T x{} and T x={} list/aggregate initialization cases only). But I believe that rule doesn't apply for any objects where adding an '= default' constructor would be useful, because it requires that there be no user-defined constructors or private/protected members. Otherwise that syntax ultimately calls the default constructor, which won't do any zeroing. See http://en.cppreference.com/w/cpp/language/aggregate_initialization http://en.cppreference.com/w/cpp/language/aggregate_initiali...