C++ class definition with a member of the same class

10 More Discussions You Might Find Interesting

1. Programming

C++ : Base class member function not accessible from derived class

Hello All, I am a learner in C++. I was testing my inheritance knowledge with following piece of code. #include <iostream> using namespace std; class base { public : void display() { cout << "In base display()" << endl; } void display(int k) {...

2. Programming

Restricting member of a class non-inheritable in C++

There is base class B, and two derived classes D1 and D2 derived from Base. Base class B, have two data members ( public or protected or private or if any). D1 should inherit both these data members, and D2 should be deriving only one member from Base class. Is this kind of design possible without...

3. Programming

Size of Derived class, upon virtual base class inheritance

I have the two class definition as follows. class A { public: int a; }; class B : virtual public A{ }; The size of class A is shown as 4, and size of class B is shown as 16. Why is this effect ?.

4. UNIX for Advanced & Expert Users

Get pointer for existing device class (struct class) in Linux kernel module

Hi all! I am trying to register a device in an existing device class, but I am having trouble getting the pointer to an existing class. I can create a class in a module, get the pointer to it and then use it to register the device with: *cl = class_create(THIS_MODULE, className);...

5. Programming

static use for class inside the same class c++

Hi, I believe the next code is wrong: class Egg { Egg e; int i; Egg(int ii=0) : i(ii) {} }; because you would end up with an endless definition (memory allocation) of Egg objects, thus int i. Ok, so God Eckel proposes for a singleton: class Egg { static Egg e; int...

6. Programming

Writing C++ class and member functions

I have the following class and thought that when I call the set command to set a member, I always use value. Would that be fine? class ModMisfit { protected: Real dtau; Real mdacc; Real mindist; bool hw; Source** src; public: void ...

7. UNIX for Dummies Questions & Answers

car class (not school class)

im just trying to have some fun and kill some time writing a c++ program that has a person type in a car make and model then gives them a year and a price. or something like that. i always have problems getting it goin but once the ball is rolling im usually pretty good. anyone wanna help me out? ...

8. Programming

Handling a signal with a class member function

Hello, i am using the sigaction function to handle the SIGCHLD signal.Is it possible to use a class member function as the handler function (the sa_handler member of the sigaction structure)? The function's signature is: void (*sa_handler)(int);so i don't think i can use a static member function...

9. UNIX Desktop Questions & Answers

It's first class!

Hi..!!!You have a very nice web-site! Good work!I am also webmaster and I like this one!Thank you!

10. UNIX Desktop Questions & Answers

It's first class!

This is a great sight! Excellent site, added to favorites!! I am also webmaster and I like this one!Thank you!

LEARN ABOUT HPUX

is

is(n)								    [incr Tcl]								     is(n)

__________________________________________________________________________________________________________________________________________________

NAME

       is - test argument to see if it is a class or an object

SYNOPSIS

       itcl::is option ?arg arg ...?
_________________________________________________________________

DESCRIPTION

       The is command is used to check if the argument given is a class or an object; depending on the option given. If the argument if a class or
       object, then 1 is returned. Otherwise, 0 is returned.  The is command also recognizes the commands wrapped in the itcl code command.

       The option argument determines what action is carried out by the command.  The legal options (which may be abbreviated) are:

       is class command
	      Returns 1 if command is a class, and returns 0 otherwise.

	      The fully qualified name of the class needs to be given as the command argument. So, if a class resides in  a  namespace,  then  the
	      namespace needs to be specified as well. So, if a class C resides in a namespace N, then the command should be called like:
	      is N::C
		  or
	      is ::N::C

       is object ?-class className? command
	      Returns 1 if command is an object, and returns 0 otherwise.

	      If  the  optional "-class" parameter is specified, then the command will be checked within the context of the class given. Note that
	      className has to exist. If not, then an error will be given. So, if className is uncertain to be a class, then the  programmer  will
	      need to check it's existance beforehand, or wrap it in a catch statement.

	      So, if c is an object in the class C, in namespace N then these are the possibilities (all return 1):
	      set obj [N::C c]
	      itcl::is object N::c
	      itcl::is object c
	      itcl::is object $obj
	      itcl::is object [itcl::code c]

KEYWORDS

       class, object

itcl									3.3								     is(n)

Programming