using initializer list

[Tony Johansson]

Hello!

Is it possible to put the body below which is the instansiating of Test in
the initialize list in some way.

CEx07aView::CEx07aView()
{
m_pDlg = new Test(this);
}

//Tony

[Alf P. Steinbach]

* Tony Johansson:

Is it possible to put the body below which is the instansiating of Test in
the initialize list in some way.

CEx07aView::CEx07aView()
{
m_pDlg = new Test(this);
}

You have asked a lot of such homework questions earlier.

Please consult your textbook.

Cheers.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
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[John Harrison]

Tony Johansson wrote:

Hello!

Is it possible to put the body below which is the instansiating of Test in
the initialize list in some way.

CEx07aView::CEx07aView()
{
m_pDlg = new Test(this);
}

Simple

CEx07aView::CEx07aView() : m_pDlg(new Test(this))
{
}

But some compilers might give you warnings with this code. This is
because you are using 'this' before the object it is refering to has
been constructed, which is potentially a dangerous situation. I think I
would usually prefer this code

CEx07aView::CEx07aView() : m_pDlg(0)
{
m_pDlg = new Test(this);
}

The main difference between all three sets of code is what would happen
if new Test(this) threw an exception.

john

[Rolf Magnus]

John Harrison wrote:

CEx07aView::CEx07aView()
{
m_pDlg = new Test(this);
}

....
CEx07aView::CEx07aView() : m_pDlg(new Test(this))
{
}
....
CEx07aView::CEx07aView() : m_pDlg(0)
{
m_pDlg = new Test(this);
}

The main difference between all three sets of code is what would happen
if new Test(this) threw an exception.

How are they different in that regard?

[Alf P. Steinbach]

* Rolf Magnus:

John Harrison wrote:

CEx07aView::CEx07aView()
{
m_pDlg = new Test(this);
}

...

CEx07aView::CEx07aView() : m_pDlg(new Test(this))
{
}

...

CEx07aView::CEx07aView() : m_pDlg(0)
{
m_pDlg = new Test(this);
}

The main difference between all three sets of code is what would happen
if new Test(this) threw an exception.

How are they different in that regard?

Consider:

struct CEx07aView;

struct Test
{
Test( CEx07aView* ){ throw 666; }
};

struct FooBar
{
FooBar() { std::cout << "1\n"; }
~FooBar() { std::cout << "2\n"; }
};

struct CEx07aView
{
Test* m_pDlg;
FooBar foo;

...
};

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?