Any differnece between STRUCT and class?

Snajpa · 10-30-2011 04:42 PM

Just quick question

Code:

class ClassName : public Game::Chr 

{

public:

   virtual Bool update();

};

This will work as same as

Code:

STRUCT(Namehere, Game::Chr)

//{

virtual Bool update();

};

?

rndbit · 10-30-2011 06:22 PM

stuff in struct is public by default so you dont need 'public:' bit. other than that - its exactly the same (except for how it looks in the code, macro aint pretty..)

Snajpa · 10-30-2011 07:43 PM

Ok thanks

Dwight · 10-30-2011 09:40 PM

There are also some optimization-things that you should look up between a struct and a class; so they are in fact not exactly the same (except for the public/private defaults difference).

Sometimes a struct is preferred over a class or vice versa.

Driklyn · 10-31-2011 06:29 AM

rndbit is right about struct vs class, however the purpose of STRUCT (the macro) is to maintain cross-platformability. If you plan on releasing your game on the Mac or iOS devices, you will need to use STRUCT when extending EE classes. This is because __super is not available under the GCC compiler (Wiki page).

Also, I agree with rndbit, the macro ain't pretty..

Snajpa · 10-31-2011 11:41 AM

Ok now I understand everything. Thanks all wink

rndbit · 11-07-2011 05:09 PM

(10-30-2011 09:40 PM)Dwight Wrote: There are also some optimization-things that you should look up between a struct and a class; so they are in fact not exactly the same (except for the public/private defaults difference).

Sometimes a struct is preferred over a class or vice versa.

like what optimizations?

Dwight · 11-07-2011 08:06 PM

On runtime, there have been tests (you can google them) in which the difference is just a couple of seconds in 2.5 million calls.

In addition to that, the following link can be of help:
http://geekswithblogs.net/mahesh/archive...93753.aspx

These performance issues are not even worth considering in a project, but there IS a difference in performace, even if it is suuuuuper small (to the extent of my knowledge).

rndbit · 11-08-2011 07:09 PM

that link - wrong language. we are dealing with c++ here.

Any differnece between STRUCT and class?
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