CODEWITHSUNDEEP
c++pointersrvaluelvalue
user1086635
user1086635

Reputation: 1544

Is a pointer an lvalue or rvalue?

In other post, I came across

(5.2.9/8) An rvalue of type "pointer to member of D of type cv1 T" can be converted to an rvalue of type "pointer to member of B of type cv2 T", where B is a base class (clause 10) of D,

Note this from language standard. So my question,

int i = 0;
int *p = &i;
*p = 1;

Is a pointer is an lvalue in all the cases? When does it is treated as rvalue?

Upvotes: 8

Views: 8193

Answers (1)

David Schwartz
David Schwartz

Reputation: 182763

A pointer is not the kind of thing that can be an rvalue or an lvalue. A pointer is a type. The only thing that can be an rvalue or an lvalue is an expression.

Consider this similar question: "Is an integer an lvalue or an rvalue". Well, neither. "3" is an integer, and an rvalue. 3=i; is illegal. But i=3; is legal if i is an integer. So i is an integer and an lvalue. 3 is an integer and a rvalue.

Upvotes: 23

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