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Groups > comp.lang.c++ > #14570
| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: A question on "uncopyable" that disable copy constructor |
| Date | 2012-02-28 17:18 +1300 |
| Message-ID | <9r32s9Fcg8U1@mid.individual.net> (permalink) |
| References | (1 earlier) <slrnjkieqh.1ls.grahn+nntp@frailea.sa.invalid> <jig452$rua$1@dont-email.me> <slrnjkn9pb.1ls.grahn+nntp@frailea.sa.invalid> <jiga7c$4rs$1@dont-email.me> <slrnjknrit.1ls.grahn+nntp@frailea.sa.invalid> |
On 02/28/12 09:58 AM, Jorgen Grahn wrote: > On Mon, 2012-02-27, yatremblay@bel1lin202.(none) (Yannick Tremblay) wrote: >> >> We have the HomeForSale class. It is non-sensical to copy a >> HomeForSale and the concept a a default HomeForSale is also >> non-sensical (we don't live in dark utopia of default homes :-) >> >> But /just to avoid using any kind of pointers/, you find a way to >> implement copying and default construction that you then need to >> document to explain to future generation that they should never be >> used per se and that they are only a hack to fullfill the std::vector >> requirements... > > That's right. I assume most people do it that way. > (If most people here don't, I'd like to hear about it!) Well I wouldn't. I hardly ever store Ts in a vector. More often than not I use a container of shared_ptr<T>. Adding a copy constructor when your class design doesn't warrant one is poor form. Consider what will happen if you later need to add a reference member or a managed resource to your class. >> Why is using "any kind of pointer" such a bad thing that it is worth >> jumping through hoop to avoid doing it? > > I don't enjoy doing it, but "jumping through hoops" is overstating the > problem. > > Performance, convoluted syntax, manual memory management. Probably > many other reasons too which I haven't thought of because I haven't > encountered those problems. > > I'm also not sure that I'd prefer finding a null pointer in my array, > compared to finding a nil HomeForSale. Using shared_ptr<T> removes most of those issues. -- Ian Collins
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A question on "uncopyable" that disable copy constructor TH <python152@gmail.com> - 2012-02-22 20:45 -0800
Re: A question on "uncopyable" that disable copy constructor Ian Collins <ian-news@hotmail.com> - 2012-02-23 18:33 +1300
Re: A question on "uncopyable" that disable copy constructor Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-02-23 08:47 +0000
Re: A question on "uncopyable" that disable copy constructor Ian Collins <ian-news@hotmail.com> - 2012-02-26 08:16 +1300
Re: A question on "uncopyable" that disable copy constructor Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-02-25 19:49 +0000
Re: A question on "uncopyable" that disable copy constructor yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2012-02-27 14:32 +0000
Re: A question on "uncopyable" that disable copy constructor Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-02-27 15:54 +0000
Re: A question on "uncopyable" that disable copy constructor yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2012-02-27 16:15 +0000
Re: A question on "uncopyable" that disable copy constructor Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-02-27 20:58 +0000
Re: A question on "uncopyable" that disable copy constructor Ian Collins <ian-news@hotmail.com> - 2012-02-28 17:18 +1300
Re: A question on "uncopyable" that disable copy constructor Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-02-28 00:00 -0500
Re: A question on "uncopyable" that disable copy constructor Ian Collins <ian-news@hotmail.com> - 2012-02-28 20:09 +1300
Re: A question on "uncopyable" that disable copy constructor Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-02-28 21:19 +0000
Re: A question on "uncopyable" that disable copy constructor Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-03-04 01:05 -0500
Re: A question on "uncopyable" that disable copy constructor 88888 Dihedral <dihedral88888@googlemail.com> - 2012-03-04 18:01 -0800
Re: A question on "uncopyable" that disable copy constructor Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-02-28 22:02 +0000
Re: A question on "uncopyable" that disable copy constructor Ian Collins <ian-news@hotmail.com> - 2012-02-29 11:15 +1300
Re: A question on "uncopyable" that disable copy constructor Miles Bader <miles@gnu.org> - 2012-02-23 15:14 +0900
Re: A question on "uncopyable" that disable copy constructor "T.H." <python152@gmail.com> - 2012-02-23 01:51 -0800
Re: A question on "uncopyable" that disable copy constructor bartek szurgot <basz@no.spam> - 2012-02-24 17:18 +0100
Re: A question on "uncopyable" that disable copy constructor Juha Nieminen <nospam@thanks.invalid> - 2012-02-25 19:10 +0000
Re: A question on "uncopyable" that disable copy constructor Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-02-25 17:45 -0500
Re: A question on "uncopyable" that disable copy constructor Juha Nieminen <nospam@thanks.invalid> - 2012-02-26 09:38 +0000
Re: A question on "uncopyable" that disable copy constructor Juha Nieminen <nospam@thanks.invalid> - 2012-02-26 09:42 +0000
Re: A question on "uncopyable" that disable copy constructor Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-02-27 23:23 -0500
Re: A question on "uncopyable" that disable copy constructor 88888 Dihedral <dihedral88888@googlemail.com> - 2012-02-28 17:01 -0800
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