Using an initialized object from one .cpp in another .cpp file without classess-CodePudding

I'm trying to split some functionality between multiple .cpp files and I've got an issue. Let's say, I have:

Extra.h

#include "CustomClass.h"    
namespace extraSpace
{
    extern int justInteger;
    extern CustomClass *complexObject;
}

Extra.cpp

include "Extra.h"    
int extraSpace::justInteger = 1;
CustomClass *extraSpace::complexObject = new CustomClass;
complexObject->SomeProperty = 1; // Can't do this

Main.cpp

include "Extra.h"
int main()
{
   std::cout << extraSpace::justInteger << "\n";
   std::cout << extraSpace::complexObject->SomeProperty << "\n";
}

This code works well for justInteger variable. However, I cannot manipulate complexObject properties in Extra.cpp. Is there any simple workaround here?

I thought about creating some InitObject() function, but this would mean that I would have to change the object from Main.cpp, which I would rather not do.

CodePudding user response：

CustomClass *extraSpace::complexObject = new CustomClass;
complexObject->SomeProperty = 1; // Can't do this

You can use a lamda.

CustomClass *extraSpace::complexObject = [] {
  auto* complexObject = new CustomClass;
  complexObject->SomeProperty = 1;
  return complexObject;
}();