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Quick Question About Initialization Lists

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Suppose i have the following code:
class Stream
{
   char* data;
   
   char* readPos;

   Stream(int size):data(new char[size]), readPos(data){};
};

Is the initialization order guaranteed, or there is a possibility that readPos gets initialized before data? (in which case it will contain junk)

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Data members are initialized in the order they are listed in the class. Their position in any initialization lists matters not a bit.

class Foo
{
int a;
int b;

// 'a' is initialized before 'b' - Always
Foo (int pa, int pb) : b (pa), a (pb) {}
};


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