reference to parent inherritance?

[Gernot Frisch]

Is there any way to get a reference of parent class in default c'tor?

Like this:

class foo
{
class bar
{
foo& m_f;
public:
bar(const foo* f) : m_f(*f) {}
}
m_bar(this);
};

int main()
{
foo poo;
return 0;
}
--
-Gernot
int main(int argc, char** argv) {printf
("%silto%c%cf%cgl%ssic%ccom%c", "ma", 58, 'g', 64, "ba", 46, 10);}

________________________________________
Looking for a good game? Do it yourself!
GLBasic - you can do
www.GLBasic.com

[Ian Collins]

Gernot Frisch wrote:

Is there any way to get a reference of parent class in default c'tor?

No. you have to be explicit in C++, unlike Java.

--
Ian Collins.

[Gernot Frisch]

"Ian Collins" <ia******@hotmail.com> schrieb im Newsbeitrag
news:4b*************@individual.net...

Gernot Frisch wrote:

Is there any way to get a reference of parent class in default
c'tor?

No. you have to be explicit in C++, unlike Java.

Don't know about java. I have a class "foo" that has a "helper-class"
"bar". It's just to bring somehierarchy in a large set of functions.
I'll guess I have to do it with a dynamical allocation of m_pBar the
c'tor of foo then.
Thank you,
-Gernot

[Ian Collins]

Gernot Frisch wrote:

"Ian Collins" <ia******@hotmail.com> schrieb im Newsbeitrag
news:4b*************@individual.net...

Gernot Frisch wrote:

Is there any way to get a reference of parent class in default
c'tor?

No. you have to be explicit in C++, unlike Java.

Don't know about java. I have a class "foo" that has a "helper-class"
"bar". It's just to bring somehierarchy in a large set of functions.
I'll guess I have to do it with a dynamical allocation of m_pBar the
c'tor of foo then.

I think adding a reference to the outer class is one of things proposed
for the next revision of the standard.

--
Ian Collins.

[Gernot Frisch]

"Ian Collins" <ia******@hotmail.com> schrieb im Newsbeitrag
news:4b*************@individual.net...

Gernot Frisch wrote:

"Ian Collins" <ia******@hotmail.com> schrieb im Newsbeitrag
news:4b*************@individual.net...

Gernot Frisch wrote:

Is there any way to get a reference of parent class in default
c'tor?
No. you have to be explicit in C++, unlike Java.

Don't know about java. I have a class "foo" that has a
"helper-class"
"bar". It's just to bring somehierarchy in a large set of
functions.
I'll guess I have to do it with a dynamical allocation of m_pBar
the
c'tor of foo then.

I think adding a reference to the outer class is one of things
proposed
for the next revision of the standard.

Would be nice - but my life does not depend on it.

[peter koch]

Ian Collins wrote:

Gernot Frisch wrote:

"Ian Collins" <ia******@hotmail.com> schrieb im Newsbeitrag
news:4b*************@individual.net...

Gernot Frisch wrote:

Is there any way to get a reference of parent class in default
c'tor?
No. you have to be explicit in C++, unlike Java.

Don't know about java. I have a class "foo" that has a "helper-class"
"bar". It's just to bring somehierarchy in a large set of functions.
I'll guess I have to do it with a dynamical allocation of m_pBar the
c'tor of foo then.

I think adding a reference to the outer class is one of things proposed
for the next revision of the standard.

Certainly it is not. For one thing, an inner class could very well be
stand alone.

/Peter --
Ian Collins.

[Martin Vejnár]

Gernot Frisch wrote:

Is there any way to get a reference of parent class in default c'tor?

Like this:

class foo
{
class bar
{
foo& m_f;
public:
bar(const foo* f) : m_f(*f) {}
}
m_bar(this);
};

int main()
{
foo poo;
return 0;
}

You nearly got it right.

class foo
{
class bar
{
foo & m_f;
public:
bar(foo & f) : m_f(f) {}
} m_bar;
public:
foo() : m_bar(*this) {}
};

My compiler, however, gives me a warning. See
[http://www.parashift.com/c++-faq-lit...html#faq-10.7].

--
Martin

[Gernot Frisch]

You nearly got it right.

class foo
{
class bar
{
foo & m_f;
public:
bar(foo & f) : m_f(f) {}
} m_bar;
public:
foo() : m_bar(*this) {}
};

This is exaclty what I needed. Yeee-haaaaa!

[Ian Collins]

peter koch wrote:

Ian Collins wrote:

I think adding a reference to the outer class is one of things proposed
for the next revision of the standard.

Certainly it is not. For one thing, an inner class could very well be
stand alone.

Sorry, too many dead brain cells.

I was thinking of granting a nested class access to its containing class
private members, which some compilers do as an extension.

--
Ian Collins.

[Ian Collins]

Gernot Frisch wrote:

You nearly got it right.

class foo
{
class bar
{
foo & m_f;
public:
bar(foo & f) : m_f(f) {}
} m_bar;
public:
foo() : m_bar(*this) {}
};

This is exaclty what I needed. Yeee-haaaaa!

Sorry I gave you some wrong advice, I was answering "Is there any way to
get a reference of parent class in default c'tor?" and I didn't spot
that you had a non-default constructor in your example :)

--
Ian Collins.