dev-cpp-users

[Dev-C++] Search for a kind of "Class Builder"

[Adrien R. <rab...@fr...>]

Hi all,

First sorry for my bad English, I'm french.

I discovered Dev-C++ and I wonder if it exists a kind of "class builder" 
which can help me to create HPP/CPP files quickly.

If not, can I extend the software (by a sort of "plugin", I mean) to include 
a such tool created by myself (I'm used to develop with Delphi) ? How ?

Thank you !

A.R. 

Re: [Dev-C++] Search for a kind of "Class Builder"

[Thomas W. <wi...@we...>]

Adrien REBOISSON wrote:
> Hi all,
> 
> First sorry for my bad English, I'm french.
First sorry for my bad English, I'm German.

> I discovered Dev-C++ and I wonder if it exists a kind of "class builder" 
> which can help me to create HPP/CPP files quickly.

I am pretty shure that the Dev-C++ class anager includes that feature. I can't 
check this at the moment but it might be some right-click option inside the 
class browser.

-=#=-
mfg, Thomas

Re: [Dev-C++] Search for a kind of "Class Builder"

[Adrien R. <rab...@fr...>]

Oh yes, I'm stupid, I should have read the f... manual !! It was right-click 
on the "Class" tab, and the "New class" subitem in the contextual menu.
I'm new to DevC++ and I expected to find this feature in the main menu bar. 
Sorry.

Best regards,

A.R.

----- Original Message ----- 
From: "Thomas Witt" <wi...@we...>
To: "Adrien REBOISSON" <rab...@fr...>
Cc: <dev...@li...>
Sent: Thursday, November 18, 2004 10:37 AM
Subject: Re: [Dev-C++] Search for a kind of "Class Builder"


> Adrien REBOISSON wrote:
>> Hi all,
>>
>> First sorry for my bad English, I'm french.
> First sorry for my bad English, I'm German.
>
>> I discovered Dev-C++ and I wonder if it exists a kind of "class builder" 
>> which can help me to create HPP/CPP files quickly.
>
> I am pretty shure that the Dev-C++ class anager includes that feature. I 
> can't check this at the moment but it might be some right-click option 
> inside the class browser.
>
> -=#=-
> mfg, Thomas
>
> 

Re: [Dev-C++] Search for a kind of "Class Builder"

[Szczepan H. <ru...@wp...>]

> I discovered Dev-C++ and I wonder if it exists a kind of "class builder" 
> which can help me to create HPP/CPP files quickly.

Try Jimmy Venema's ClassBuilder! It is pretty usable at 2.4. The development 
has been stalled for several months but the author says it is a temporary 
situation.

http://members.lycos.nl/JimmyVenema/ClassBuilder/ClassBuilder.htm

Szczepan Holyszewski 

[Dev-C++] Open question: (static|dynamic)_casting and templates in C++

[GOUAICH A. <go...@li...>]

Hi there,

I was trying to port the code of a library to use it in my own project and I
found something interesting.

The problem is that if you have a class B, that extends another class A.
Then when using the template MyTemplateClass<B> does not have any
relationship with the class MyTemplateClass<A>.

You can see some experiments in the code presented below.

If someone has a more detailed documentation (specification) explaning why
this cannot be done I would appreciate.

Kind regards,





8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<----
-
#include <iostream>
#include <stdlib.h>

using namespace std;

template <class T>
class Ref{
      T* ptr;
      public:
             Ref(T* p)
             {
               this->ptr = p;
             };
             Ref( const Ref<T>& clone)
             {
               this->ptr = clone.ptr;
             };
             T* get()
             {
                return ptr;
             }
             // [added after] to make this type
             // plymorphic
             virtual void trick(void )
             {
             };

};

class A
{
  public:
         A()
         {
         };
         virtual void ping()
         {
         cout << "A" <<endl;
         };
};

class B: public A
{
  public:
         B():A()
         {
         };
         virtual void ping()
         {
         cout << "B" <<endl;
         };
};

void test_call(Ref<A>& x )
{
     x.get()->ping();
  //just a test
};

int main(int argc, char *argv[])
{
  A* a= new A();
  B* b= new B();
  Ref<A>* ref_a = new Ref<A>(a);
  Ref<B>* ref_b = new Ref<B>(b);


  //-------------------
  //test_call(*ref_a);
  //->this is ok !
  // output:
  // $ A
  // $ press any key to continue...


  //-------------------
  //test_call(*ref_b);
  // compilation problem.
  //->log:
  // could not convert *reb_b to
  // Ref<A>& .... mmmmm

  //so try to cast....

  //static_cast
  //test_call(static_cast< Ref<A> >(*ref_b));
  // mmmm does not work ! :(
  //log:
  //main.cpp:53: no matching function for call to `Ref<A>::Ref(Ref<B>&)'
  //main.cpp:15: candidates are: Ref<T>::Ref(const Ref<T>&) [with T = A]
  //main.cpp:11:                 Ref<T>::Ref(T*) [with T = A]

  //ok dynamic cast now !!
  //Ref<A>* tmp = dynamic_cast< Ref<A>* >(ref_b);
  //if(tmp)
  //{
  //       test_call(* tmp );
  //}
 //else
 //{
  //cout << "error with the cast...." <<endl;
 //}
  //main.cpp: In function `int main(int, char**)':
  //main.cpp:86: cannot dynamic_cast `ref_b' (of type `class Ref<B>*') to
type `
  //class Ref<A>*' (source type is not polymorphic)

  //I suspect that the compiler consider Ref<A> as not
  //being plymorphic ... so add a virtual method
  //to this class and see what will happen...
  //see [added after] in class Ref

  Ref<A>* tmp = dynamic_cast< Ref<A>* >(ref_b);
  if(tmp)
  {
         test_call(* tmp );
  }
  else
  {
    cout << "error with the cast...." <<endl;
  }
  // Now the program compiles but the
  // during the runtime the dynamic_cast
  // does not work ! ,(

  //conclusion...
  // even if B extends A; Ref<B> has no relationship with Ref<A>
  //!!!!!!!!!! a bit strange...

  //the correct method is to do as follows:
  //rebuild the class manually.

  A* tmp_ptr = static_cast<A* >(ref_b->get());  //or dynamic_cast
  Ref<A> tmp_ref_a (tmp_ptr);
  test_call(tmp_ref_a);

  //And now the output is :
  // $ B
  // $ press any key to continue...
  // ok!

  system("PAUSE");
  return 0;
}