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General and Gameplay Programming Programming

Started by DevLiquidKnight August 12, 2003 06:42 PM

17 comments, last by DevLiquidKnight 20 years, 8 months ago

576

August 13, 2003 05:03 PM

Implementing a normal, user-initiated quit in terms of exceptions is laziness and shoddy program design. Quitting isn''t exceptional when the user requested it - exceptions should be exceptional (rare) in nature.

An abnormal event generating an exception that leads to a quit I can understand.

But don''t abuse exceptions as flow control, they aren''t used enough as is and they don''t need a bad reputation:

int main(){ try {  myHopelesslyInfiniteLoopICantStop(); } catch(const QuitException&) { } return 0;}

--God has paid us the intolerable compliment of loving us, in the deepest, most tragic, most inexorable sense.- C.S. Lewis

Beer Hunter

712

August 13, 2003 05:08 PM

quote:Original post by Redleaf
Not to be picky, but you should actually catch exceptions by reference. That way, a base catch statement will also catch derived exceptions.

In C++, yes, but I think langguy''s code was Java.

Cedric

158

August 13, 2003 05:51 PM

quote:Original post by Beer Hunter
In C++, yes, but I think langguy''s code was Java.

I would say C#

Or maybe Managed C++... I''m not sure how they treat references to __gc classes.

bastard2k5

238

August 13, 2003 10:38 PM

It''s java, because in the Java API, there is an Exception class, and if you want to create any custom exception types, you should inherit from Exception.where it is the generic catch. There is an exception class in but it isn''t as used as Java''s Exception. And if I remember correctly, you should have for C++

catch(const exception& e){....;}

antareus

576

August 13, 2003 10:43 PM

Ok the thread has gotten pedantic.

That is definitely C#.

Does Java have a MessageBox class with a static Show function like that? Of course not, in Java it''d be MessageBox.show()!

--God has paid us the intolerable compliment of loving us, in the deepest, most tragic, most inexorable sense.- C.S. Lewis

DevLiquidKnight

834

Author

August 13, 2003 10:58 PM

catch(expection) more info on what exactly the exepction part can be? i dont get it how do i iknow what i can and cannot put there? Where is it passed in? how does that work? What exactly does the catch part do like what is it catching... What will it be when its caught ect?

coder requires 0xf00d before continue().

Killer Eagle Software

[edited by - DevLiquidKnight on August 13, 2003 12:00:37 AM]

DevLiquidKnight

834

Author

August 13, 2003 11:04 PM

whats this do? it does nothing lol its an infinit type of thingy?

#include <iostream.h>
#include <stdlib.h>
#include <stdio.h>

int main()
{
try
{
for(int i=0; ; i++)
{
}
}
catch(int expection)
{
cout << expection << endl;
}
return 0;
}

Colin Jeanne

1,115

August 14, 2003 12:58 AM

quote:Original post by DevLiquidKnight
whats this do? it does nothing lol its an infinit type of thingy?

#include <iostream.h>
#include <stdlib.h>
#include <stdio.h>

int main()
{
try
{
for(int i=0; ; i++)
{
}
}
catch(int expection)
{
cout << expection << endl;
}
return 0;
}

It goes into an infinite loop.

Please take a look at chapter 1 in this book

Qui fut tout, et qui ne fut rien
Invader's Realm

[edited by - Invader X on August 14, 2003 1:58:50 AM]