troubleshooting Question

nested class

Avatar of perlperl
perlperl asked on
C++
8 Comments1 Solution225 ViewsLast Modified:
class A {
   private:
        std::set <uint32_t> ids;
   friend class B; 

   class B {
        public: 
             B(uint32_t in) : num (in) {
                 ids.insert(num);  // compiler error here
             }
             ~B() {
                 ids.erase(num);   // compier error here too. 
               }
         private: 
             uint32_t num; 
    };
};

main() { 
   A onj;
   { 
      

   }
}

Compiler is failing with
 error: invalid use of nonstatic data member
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