RE: [Dev-C++] Constructors throwing exceptions.

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Daniel Glenfield
> Sent: Tuesday, July 23, 2002 3:52 PM
> To: dev...@li...
> Subject: [Dev-C++] Constructors throwing exceptions.
> 
> 
> Hello all,
>    I want my constructors (default, overloaded, and copy) to throw an 
> exception if they fail.
> 
> 1) How do I test if the constructor has failed?


The usual way.


void somefunc()
{
 try
 {

  A a(1);

 // ... Do your job
 }

 catch(failure)
 {
 // ...
 }
}

  





> 2) Is it better to create an Exception class to throw 
> exception objects, 
> rather than throwing strings and integers?


The answer is that it is better to create an hierarchy of exceptions in
large projects. The rest is up to you.




> 3) Where does the catch block go? In the main function after 
> the object has 
> been created? Or in the constructor body?


You can catch exceptions thrown by other sub-objects during the
construction phase and deal with them locally, or deal with them locally
and rethrow some (or the same) exception.



Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
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