What type does C++ expect for array subscripts?
arrays, c++, pointers, standards, subscript-operator
Solution
C++ is exactly the same as C in this respect. C++11 §5.2.1:
The expression `E1[E2]` is identical (by definition) to `*((E1)+(E2))`
Problem
In C, array subscription: `a[b]` is merely the syntactic sugar equivalent of dereferencing after pointer arithmetic: `*(a+b)` (as explained, say, here). How is array subscription interpreted in C++, for base types? (Not for classes, for which we have overload semantics)? And, more specifically, what type does C++ expect to appear as the subscript? Is it a `ptrdiff_t`?