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IWETHEY Home / IWETHEY Board / Theory and Practice of Programming Forum / Why the hell would it do / allow that?
Post #264,974
by drewk
Picture of drewk
8/15/06 4:45:34 PM
Reply
New Why the hell would it do / allow that?
Would anyone like to jump in and say that's not brain damaged? Anyone?
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Post #264,976
by tuberculosis
Picture of tuberculosis
8/15/06 4:57:05 PM
Reply
New Bell labs has an unlimited crack budget
It has its uses. Here's one.

class G {}

class F
{
G _g; // private member g
public:
G& g() { return _g; } // if we are not const, then neither is our G
const G& g() {return _g; } // if we are const, so is our G
};

So the rule is, if the F is const then you can't mess with the G. But if its not, than you can mess with the G.

Notice that I have to write a bunch of boilerplate to extend the const bubble around the F to cover the G by overloading the g member on const. This is what I dislike about C++. You get this idea that the world should be surrounded by safety rails and you spend your whole life filling in the gaps to make sure that the safety rails cover as much ground as possible - all at the expense of writing code that just does something.



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     C++ question on const - (ChrisR) - (24) - Aug. 14, 2006, 10:10:50 AM EDT
         Don't change the object, I believe - (JayMehaffey) - (2) - Aug. 14, 2006, 11:05:16 AM EDT
             Doh. - (ChrisR) - (1) - Aug. 15, 2006, 12:27:00 PM EDT
                 More than that... - (jb4) - Aug. 15, 2006, 04:05:02 PM EDT
         Re: C++ question on const - (tuberculosis) - (20) - Aug. 14, 2006, 11:22:39 PM EDT
             I still don't understand... - (ChrisR) - (19) - Aug. 15, 2006, 10:59:52 AM EDT
                 Const is not always forced - (JayMehaffey) - Aug. 15, 2006, 11:23:16 AM EDT
                 Its counterintuitive - (tuberculosis) - (14) - Aug. 15, 2006, 01:03:04 PM EDT
                     Say WHAT?!? - (jb4) - (13) - Aug. 15, 2006, 04:30:02 PM EDT
                         You can overload on const - (tuberculosis) - (11) - Aug. 15, 2006, 04:47:41 PM EDT
                             Why the hell would it do / allow that? - (drewk) - (1) - Aug. 15, 2006, 04:45:34 PM EDT
                                 Bell labs has an unlimited crack budget - (tuberculosis) - Aug. 15, 2006, 04:57:05 PM EDT
                             The easiness to keep track of is not the issue - (jb4) - (8) - Aug. 15, 2006, 05:49:16 PM EDT
                                 Huh? - (tuberculosis) - (7) - Aug. 15, 2006, 06:51:19 PM EDT
                                     No... - (jb4) - (6) - Aug. 16, 2006, 10:12:37 AM EDT
                                         I think you're talking past each other... - (admin) - Aug. 16, 2006, 11:11:53 AM EDT
                                         And you specify that by.... - (tuberculosis) - (4) - Aug. 16, 2006, 11:48:14 AM EDT
                                             We'll leave it at that. - (jb4) - (3) - Aug. 16, 2006, 12:32:21 PM EDT
                                                 I wasn't trying to be sarcastic - (tuberculosis) - (2) - Aug. 16, 2006, 01:27:58 PM EDT
                                                     No need to specify OO in this case - (JayMehaffey) - Aug. 16, 2006, 01:35:32 PM EDT
                                                     What does the type of the reference have to do with anything - (jb4) - Aug. 16, 2006, 03:06:42 PM EDT
                         Nominating this for LRPD (new thread) - (lincoln) - Aug. 18, 2006, 03:18:45 PM EDT
                 Re: I still don't understand... - (jb4) - (2) - Aug. 15, 2006, 04:16:40 PM EDT
                     Which brings up another question. - (ChrisR) - (1) - Aug. 15, 2006, 08:25:15 PM EDT
                         Pure virtual functions - (tuberculosis) - Aug. 15, 2006, 09:01:04 PM EDT

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