CODEWITHSUNDEEP
c++oopc++11
Youcef4k
Youcef4k

Reputation: 396

Compiler-generated move member functions on static data members

In Effective Modern C++, item 17 (Understand special member function generation), Scott Meyers said that the generated special move member functions (move constructor and move assignment operator) perform “memberwise moves” on the non-static data members of the class.

The move operations are generated only if they’re needed, and if they are generated, they perform “memberwise moves” on the non-static data members of the class.

I tried to understand the non-static condition but I couldn't, can anyone explain to me why can't they perform that on static data members?

Upvotes: 1

Views: 163

Answers (2)

alfC
alfC

Reputation: 16300

I think it simply referres to static members, as here:

struct A{
   static int s; // static member, (not moved or copied when moving/copying an instance
   int w; // non-static member
};

Upvotes: 2

rbf
rbf

Reputation: 553

Because static members are not part of the created objects from that class. Though they don't need to be moved (or copied in case of copy constructor).

Upvotes: 2

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