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| From | "Bo Persson" <bop@gmb.dk> |
| Newsgroups | comp.lang.c++ |
| Subject | Re: removing constness of a true const |
| Date | Thu, 14 Jul 2011 23:33:47 +0200 |
| Lines | 27 |
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siddhu wrote: > On Jul 14, 1:05 pm, "Balog Pal" <p...@lib.hu> wrote: >> "siddhu" <siddharth....@gmail.com> >> >>> I guess removing constness of a true const( I guess it is also >>> called bitwise const ) using const_cast is undefined behavior. >>> Can you please give an example of a true const and may be a >>> sample code which exhibits undefined behavior by removing >>> constness of a true const. >> >> Removing constness is well defined. But actually modifying >> non-mutable member of a const object is UB. By any means, >> including the use of pointer/ref from const_cast. > > Thanks Balog! > Does that mean removing constness of 'this' in const member function > is an UB? It is if the object is really const. Suppose the data is stored in a ROM. What happens when you try to change it? Bo Persson
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removing constness of a true const siddhu <siddharth.sng@gmail.com> - 2011-07-14 08:07 -0700
Re: removing constness of a true const Victor Bazarov <v.bazarov@comcast.invalid> - 2011-07-14 11:55 -0400
Re: removing constness of a true const siddhu <siddharth.sng@gmail.com> - 2011-07-14 09:25 -0700
Re: removing constness of a true const Victor Bazarov <v.bazarov@comcast.invalid> - 2011-07-14 16:18 -0400
Re: removing constness of a true const "Balog Pal" <pasa@lib.hu> - 2011-07-15 01:18 +0200
Re: removing constness of a true const Victor Bazarov <v.bazarov@comcast.invalid> - 2011-07-15 08:17 -0400
Re: removing constness of a true const "Balog Pal" <pasa@lib.hu> - 2011-07-15 18:04 +0200
Re: removing constness of a true const Ian Collins <ian-news@hotmail.com> - 2011-07-16 08:36 +1200
Re: removing constness of a true const "Balog Pal" <pasa@lib.hu> - 2011-07-16 02:00 +0200
Re: removing constness of a true const Paavo Helde <myfirstname@osa.pri.ee> - 2011-07-15 16:08 -0500
Re: removing constness of a true const Ian Collins <ian-news@hotmail.com> - 2011-07-16 09:30 +1200
Re: removing constness of a true const "Balog Pal" <pasa@lib.hu> - 2011-07-14 19:05 +0200
Re: removing constness of a true const siddhu <siddharth.sng@gmail.com> - 2011-07-14 12:05 -0700
Re: removing constness of a true const "Bo Persson" <bop@gmb.dk> - 2011-07-14 23:33 +0200
Re: removing constness of a true const Victor Bazarov <v.bazarov@comcast.invalid> - 2011-07-14 17:46 -0400
Re: removing constness of a true const "Bo Persson" <bop@gmb.dk> - 2011-07-16 08:32 +0200
Re: removing constness of a true const "Johannes Schaub (litb)" <schaub.johannes@googlemail.com> - 2011-07-15 15:02 +0200
Re: removing constness of a true const Victor Bazarov <v.bazarov@comcast.invalid> - 2011-07-15 09:54 -0400
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