What &class_type::member_field means in c++?

Asked Mar 27 '23 at 22:37

Active Mar 27 '23 at 22:43

Viewed 38 times

I was looking for a way to get the offset of a class field and found this answer.

I still can't figure out how these expressions work:

offsetOf(&X::c)

and

template<typename T, typename U> constexpr size_t offsetOf(U T::*member)

What do &X::c and U T::*member mean in this context?

edited Mar 27 '23 at 22:40

Remy Lebeau

asked Mar 27 '23 at 22:37

Smok1e

1

Why not just use the standard `offsetof()` instead? `offsetof(X, c)` – Remy Lebeau Mar 27 '23 at 22:41
but `c` isn't a function – Smok1e Mar 27 '23 at 22:41
I'll add dupes for data members, too. – Evg Mar 27 '23 at 22:43
@RemyLebeau i didn't know about offsetof - that's why i was looking for answer here and found this. Anyway thank you – Smok1e Mar 27 '23 at 22:43
@Smok1e https://en.cppreference.com/w/cpp/types/offsetof – Remy Lebeau Mar 27 '23 at 22:46

0 Answers0