CODEWITHSUNDEEP
c++pointerssingleton
Pier
Pier

Reputation: 10837

incomplete type error in singleton

I need a pointer to my main class from a singleton class. The singleton class header is included in the main class.

In MainClass.cpp

mSingletonInstance->mMainClass = this;

To avoid a recursive inclusion problem I do not include my main class header in the singleton class, I just simply use a forward declaration of the main class.

In Singleton.h:

class MainClass;

class Singleton {
    public:
       MainClass *mMainClass;
};

The problem comes when I try to access a method from the main class... I get an incomplete type error.

In Singleton.cpp

Singleton::myMethod(){
    mMainClass->someMethod(); // incomplete type error
}

The MainClass and Singleton are already defined when this happens...

Upvotes: 0

Views: 477

Answers (1)

Dmitriy Kachko
Dmitriy Kachko

Reputation: 2914

Seems like you didn't include mainclass.h in singleton.cpp.

Upvotes: 1

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