3 ms·
Not without an UB
by shultays 10y ago
Not without an UB
- ArkyBeagle 10y agoIf you never dereference a null pointer, then there will be no UB of that type.
- shultays 10y agoI guess it counts as dereferencing. Here is what standard says "A reference shall be initialized to refer to a valid object or function. Note: in particular, a null reference cannot exist in a well-defined program, because the only way to create such a reference would be to bind it to the “object” obtained by dereferencing a null pointer, which causes undefined behavior"
- adrianratnapala 10y agoSo in other words my comment should have said that: in C++ it is easy to create something that is either a null-reference or some other, much more unpredictable, undefined thing. Well then! That just goes to show how much safer C++ references are than I had previously supposed.