Assign with nullptr and zero size

Question

If I, for example, have a vector v, is this normal by standard:

void setData(const uint8_t* p, size_t s) {
    v.assign(p, p+s);
}

setData(nullptr, 0);

In general, it is always normal to call STL functions XXX(InputIterator first, InputIterator last), as described above, when distance(first,last) == 0?

Answer 1

Yes. It is ok to copy the value nullptrto another pointer object and that the whole implementation could do this. It is already forbidden to go past the end (defined here from the beginning == end) or play it.

Answer 2

In addition to what is stated in Potatoswatter, C ++ also made a nullptr + 0 valid statement . This was not the case in C.