C++ class inheritance

C++ class inheritance

[Rafael Costa dos Santos]

Can anyone explain me what does < > means ? 
Example:

class RegistrationRequestPDU : public RasPDU<H225_RegistrationRequest>
{
} ;

Is "RegistrationRequestPDU" inheriting from RasPDU, H225_RegistrationRequest 
or both ?

-- 
Rafael Costa dos Santos
rafael@thinkfreak.com.br

Re: C++ class inheritance

[Voicu Liviu]

Rafael Costa dos Santos wrote:

>Can anyone explain me what does < > means ? 
>Example:
>
>class RegistrationRequestPDU : public RasPDU<H225_RegistrationRequest>
>{
>} ;
>
>Is "RegistrationRequestPDU" inheriting from RasPDU, H225_RegistrationRequest 
>or both ?
>
>  
>
RegistrationRequestPDU  inherits from RasPDU using template H225_RegistrationRequest ?


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Re: C++ class inheritance

[Rafael Costa dos Santos]

Ok, but as I am C ANSI programmer it is a bit dificult to underestand.

Are you saying that "RasPDU" is a general class that depends on the template 
(in this case "H225_RegistrationRequest") that is informed ?

Is it similar to create a specific class like:

class RasPDU : public H225_RegistrationRequest
{
} ;

and inherit from it ?

class RegistrationRequestPDU : public RasPDU
{
} ;

On Thursday 02 October 2003 07:30, Voicu Liviu wrote:
> Rafael Costa dos Santos wrote:
> >Can anyone explain me what does < > means ?
> >Example:
> >
> >class RegistrationRequestPDU : public RasPDU<H225_RegistrationRequest>
> >{
> >} ;
> >
> >Is "RegistrationRequestPDU" inheriting from RasPDU,
> > H225_RegistrationRequest or both ?
>
> RegistrationRequestPDU  inherits from RasPDU using template
> H225_RegistrationRequest ?

-- 
Rafael Costa dos Santos
rafael@thinkfreak.com.br

Re: C++ class inheritance

[Darío Mariani]

   You better get a C++ book or tutorial, I can recommend you "The C++ 
Programming Language" by Bjarne Stroustrup, 3rd Edition.
   With templates you can parameterize types used in C++ constructs like 
classes, structs or functions.

Rafael Costa dos Santos wrote:
> Ok, but as I am C ANSI programmer it is a bit dificult to underestand.
> 
> Are you saying that "RasPDU" is a general class that depends on the template 
> (in this case "H225_RegistrationRequest") that is informed ?
> 
> Is it similar to create a specific class like:
> 
> class RasPDU : public H225_RegistrationRequest
> {
> } ;
> 
> and inherit from it ?
> 
> class RegistrationRequestPDU : public RasPDU
> {
> } ;
> 
> On Thursday 02 October 2003 07:30, Voicu Liviu wrote:
> 
>>Rafael Costa dos Santos wrote:
>>
>>>Can anyone explain me what does < > means ?
>>>Example:
>>>
>>>class RegistrationRequestPDU : public RasPDU<H225_RegistrationRequest>
>>>{
>>>} ;
>>>
>>>Is "RegistrationRequestPDU" inheriting from RasPDU,
>>>H225_RegistrationRequest or both ?
>>
>>RegistrationRequestPDU  inherits from RasPDU using template
>>H225_RegistrationRequest ?
> 
> 

RE: C++ class inheritance

[Sandro Dangui]

RasPDU is a template.
If you look at its .h file you will see something like this:

template <class T> 
class RasPDU
{
  ...
};

In your case, "T" will be replaced (compiler) by H225_RegistrationRequest.
In my opinion, tamplates are the most powerful feature of C++.




-----Original Message-----
From: Rafael Costa dos Santos [mailto:rafael@thinkfreak.com.br] 
Sent: quinta-feira, 2 de outubro de 2003 01:00
To: linux-c-programming@vger.kernel.org
Subject: C++ class inheritance



Can anyone explain me what does < > means ? 
Example:

class RegistrationRequestPDU : public RasPDU<H225_RegistrationRequest> { } ;

Is "RegistrationRequestPDU" inheriting from RasPDU, H225_RegistrationRequest

or both ?

-- 
Rafael Costa dos Santos
rafael@thinkfreak.com.br
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Re: C++ class inheritance

[IVAN DE JESUS DERAS TABORA]

Templates are like a C macros, but templates provide a more elegant form
to do things that normally you could do with C macros, in some way.
For example:

template <class T>
struct MyStruct
{ int x, y;
  T* ptr; 
}

Now you could define vars in C++:
MyStruct<int> myVar1OfTypeMyStruct;
MyStruct<float> myVar2OfTypeMyStruct;

You could do almot the same in C:
#define MyStructType(T)  typedef struct { \
                             int x, y; \
                             T* ptr;    \         
                         } MyStruct_##T \

MyStruct(int);
MyStruct(float);

Now you could define vars in C like this:
MyStruct_int myVar1OfTypeMyStruct;
MyStruct_float myVar1OfTypeMyStruct;

A i said before is more elegant the C++ form!!!!!!!!!!!

----- Original Message -----
From: Rafael Costa dos Santos <rafael@thinkfreak.com.br>
Date: Friday, October 3, 2003 6:57 am
Subject: Re: C++ class inheritance

> Ok, but as I am C ANSI programmer it is a bit dificult to underestand.
> 
> Are you saying that "RasPDU" is a general class that depends on the 
> template 
> (in this case "H225_RegistrationRequest") that is informed ?
> 
> Is it similar to create a specific class like:
> 
> class RasPDU : public H225_RegistrationRequest
> {
> } ;
> 
> and inherit from it ?
> 
> class RegistrationRequestPDU : public RasPDU
> {
> } ;
> 
> On Thursday 02 October 2003 07:30, Voicu Liviu wrote:
> > Rafael Costa dos Santos wrote:
> > >Can anyone explain me what does < > means ?
> > >Example:
> > >
> > >class RegistrationRequestPDU : public 
> RasPDU<H225_RegistrationRequest>> >{
> > >} ;
> > >
> > >Is "RegistrationRequestPDU" inheriting from RasPDU,
> > > H225_RegistrationRequest or both ?
> >
> > RegistrationRequestPDU  inherits from RasPDU using template
> > H225_RegistrationRequest ?
> 
> -- 
> Rafael Costa dos Santos
> rafael@thinkfreak.com.br
> -
> To unsubscribe from this list: send the line "unsubscribe linux-c-
> programming" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
>