C ++中的指针运算符列表

Question

对于C ++中给定的原始指针类型T* ptr ，在其上定义的所有运算符的列表是什么？

Answer 1

List of operators that I can think of:

1. The assignment operator - ptr = some other pointer
2. The dereference operator - *ptr .
3. The array operator - ptr[N] .
4. The member access operator ptr-> if T is a struct/class.
5. The pre and post increment operators - ++ptr and ptr++ .
6. The pre and post decrement operators - --ptr and ptr-- .
7. The increment and assign operator - ptr += N .
8. The decrement and assign operator - ptr -= N .
9. The unary + operator: +ptr . Note that this is not valid in C99. It is valid only in C++.
10. The binary + operator - ptr + N .
11. The binary - operator - ptr - N and ptr1 - ptr2 .
12. Is equal to: ptr == some other pointer .
13. Is not equal to: ptr != some other pointer .
14. The unary not operator: !ptr .
15. Less than operator : ptr < some other pointer .
16. Less than or equal to operator: ptr <= some other pointer .
17. Greater than operator : ptr > some other pointer .
18. Greater than or equal to operator: ptr >= some other pointer .
19. The address of operator: &ptr .

Answer 2

Assuming

T* t;

dereference

(*t).foo

or

t->foo

pointer arithmetic

t = t + 10; t += 10; // will add 10*sizeof(T)
t = t - 10; t -= 10; // will subtract 10*sizeof(T)

--t;
++t;
t--;
t++;

access like an array: (usually frowned upon)

t[10]