Is C++11’s long long really at least 64 bits?
The C++ standard references the C standard for this, see [c.limits]. LLONG_MAX is defined in <climits> with the same meaning as C’s <limits.h>‘s LLONG_MAX. And this is what C has to say: 5.2.4.2.1 Sizes of integer types <limits.h> The values given below shall be replaced by constant expressions suitable for use in #if preprocessing directives. … Read more