class outer {

public:

     class inner {

     private:
          outer m_parent;
     public:
          inner(outer* parent): 
               m_parent(parent) 
          {}

          int GetMeSome() {
               return parent->m_some;
          }
     };

private:

     int m_some;
};

     class inner { 
     private:
          outer * m_parent;
:
:
     public:
:
:
          int GetMeSome() {
               return m_parent->m_some;
          }

class outer {

public:

     class inner {

     private:
          outer* m_parent;
     public:
          inner(outer* parent): 
               m_parent(parent) 
          {}

          int GetMeSome() {
               return m_parent->m_some; //this will be shown as an error by the CDT but not by gcc
          }
     };

private:

     int m_some;
};

0:45:09 **** Build of configuration Debug for project innerOuter ****
make all 
Building file: ../src/innerOuter.cpp
Invoking: GCC C++ Compiler
g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"src/innerOuter.d" -MT"src/innerOuter.o" -o "src/innerOuter.o" "../src/innerOuter.cpp"
Finished building: ../src/innerOuter.cpp
 
Building target: innerOuter
Invoking: GCC C++ Linker
g++  -o "innerOuter"  ./src/innerOuter.o   
Finished building target: innerOuter
 
10:45:10 Build Finished. 0 errors, 0 warnings. (took 1s.69ms)

Hello World
GetMeSome returns 25