Avoid calling constructor of member variable

Question

I have the following C++-class:

// Header-File
class A
{
    public:
    A();

    private:
    B m_B;
    C m_C;
};

// cpp-File
A::A()
: m_B(1)
{
    m_B.doSom         


        

Answer 1

What you ask is forbidden - and correctly so. This ensures that every member is correctly initialized. Do not try to work around it - try to structure your classes that they work with it.

Idea:

• C has a constructor that does nothing
• C has an initialization method that makes the class usable
• C tracks whether it has been initialized correctly or not and returns appropriate errors if used without initialization.