passing parameter in member declaration

[=?ISO-8859-15?Q?Sven_K=F6hler?=]

Hi,

look at this example:

struct T1 {
bool v;

T1(bool p = false) {
this->v = p;
}
};

struct T2 {
T1 v1;
T1 v2(true);
};
The declaration of v1 is OK.
The declaration of v2 is not. I'd like to pass the parameter to the
construtor, but i can't imagine how.

How can i pass true to the constructor?
Is it possible at all?
Regards,
Sven

[Ney =?ISO-8859-1?Q?Andr=E9?= de Mello Zunino]

On Mon, 2007-05-14 at 03:16 +0200, Sven Köhler wrote:

struct T1 {
bool v;

T1(bool p = false) {
this->v = p;
}
};

struct T2 {
T1 v1;
T1 v2(true);
};
The declaration of v1 is OK.
The declaration of v2 is not. I'd like to pass the parameter to the
construtor, but i can't imagine how.

How can i pass true to the constructor?
Is it possible at all?

If I understand your question correctly, all you have to do is write a
constructor for T2 and initialize its 'v2' member in the initialization
list:

T2::T2() :
v2(true) {
}

I hope that helps,

--
Ney André de Mello Zunino
http://zunino.eti.br/

[Markus Schoder]

On Mon, 14 May 2007 03:16:11 +0200, Sven Köhler wrote:

Hi,

look at this example:

struct T1 {
bool v;

T1(bool p = false) {
this->v = p;
}
};

struct T2 {
T1 v1;
T1 v2(true);
};
The declaration of v1 is OK.
The declaration of v2 is not. I'd like to pass the parameter to the
construtor, but i can't imagine how.

How can i pass true to the constructor? Is it possible at all?

Yes, you just need to do it in T2's constructor like so:

struct T2 {
T2() : v2(true) {}
T1 v1;
T1 v2;
};

--
Markus Schoder

[fr3]

On May 14, 9:16 am, Sven Köhler <[e-mail]>
wrote:

Hi,

look at this example:

struct T1 {
bool v;

T1(bool p = false) {
this->v = p;
}

};

struct T2 {
T1 v1;
T1 v2(true);

};

The declaration of v1 is OK.
The declaration of v2 is not. I'd like to pass the parameter to the
construtor, but i can't imagine how.

How can i pass true to the constructor?
Is it possible at all?

Regards,
Sven

Do that in T2's ctor:

struct T2 {
T1 v1;
T1 v2;

T2() : v2(true) {}
};

[=?UTF-8?B?U3ZlbiBLw7ZobGVy?=]

Yes, you just need to do it in T2's constructor like so:

>
struct T2 {
T2() : v2(true) {}
T1 v1;
T1 v2;
};

Exactly what i was looking for

Thanks!