C++ 11 standards - initialize member variables in header

sayan275

Is it necessary to initialize member variables with nullptr or Q_NULLPTR in header files? If yes, why is it so required, when I do proper initialize it the ctor initialization list.

in MyDialog.h,

QDialog* m_Dialog = Q_NULLPTR;

and in MyDialog.cpp...I do

MDialog()::MDialog()
  : QDialog()
  , m_Dialog(new QDialog())
  { 
  }

And in destructor, I do proper delete n setting it to nullptr.

Why is the below required?

QDialog* m_Dialog = Q_NULLPTR;

sierdzio

@sayan275 said in C++ 11 standards - initialize member variables in header:

Why is the below required?
QDialog* m_Dialog = Q_NULLPTR;

It is not required :-)

J.Hilk

@sayan275
its like placing your hand in front of you nose, whilst sneezing.

Its polite, and I might just prevent headache later on.

sierdzio

@J.Hilk said in C++ 11 standards - initialize member variables in header:

@sayan275
its like placing your hand in front of you nose, whilst sneezing.

Its polite, and I might just prevent headache later on.

omg, best comment ever :D Very well put.

sayan275

@sierdzio yeah...haha

aha_1980

@sayan275 honestly, I just love the C++11 member init. it will save you so much trouble once you add another constructor.

and by doing 'find usages' I immediately see that the pointer always has a default value.

that may be no problem in your simple example, but for more complex classes it really simplifies the readability.

sayan275

@aha_1980 Thanks!!