Constructor overloading and code reuse

[chpicker]

Is there a way to overload a class constructor but still be able to reuse code? For instance, say I have two constructors for MyClass:
[tt]
MyClass::MyClass();
MyClass::MyClass(int a);
[tt]
I would like the second constructor to call the default constructor. If passed a parameter, it will do all of the same things the normal constructor does plus more code that is specific to the parameter.

Is there a way to do this, or am I stuck duplicating the code in both constructors?

Ian

 

[programsecrets]

Instead of calling one constructor from the other, you should call another function from both constructors for the things that are common to both:

MyClass::MyClass()
{
  CommonStuff();
}

MyClass::MyClass(int a)
{
  CommonStuff();

  m_iMyInteger = a;
}

void MyClass::CommonStuff(void)
{
  // do common things here
}

 

[chpicker]

Ok, that makes sense. I assume, then, that it isn't possible to call the other constructor? I got some really weird errors when I tried, which made me think I just did it wrong.

Thanks!

Ian

 

[DeCoDeR]

MyClass::MyClass()
{
//do stg
}

MyClass::MyClass(int a):MyClass()
{
m_iMyInteger = a;
}

Read between the lines

 

[chpicker]

Hmm...that didn't work. The compiler returns:

error C2614: 'MyClass' : illegal member initialization: 'MyClass' is not a base or member

Any other suggestions?

Ian