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| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Array sizes and const |
| Date | 2012-06-04 09:08 +1200 |
| Message-ID | <a3221hF47cU9@mid.individual.net> (permalink) |
| References | <jqdtou$koe$1@dont-email.me> <pan.2012.06.02.22.50.02.517000@nowhere.com> <jqedjj$9gi$1@dont-email.me> <39346056-1528-4667-85d2-a860b6ba018a@googlegroups.com> |
On 06/ 4/12 02:39 AM, Malcolm McLean wrote: > בתאריך יום ראשון, 3 ביוני 2012 02:11:15 UTC+1, מאת James Kuyper: >> On 06/02/2012 06:50 PM, Nobody wrote: >> ... >>> The main purpose of "const" is to tell the compiler to assume that the >>> value won't change. >> >> I don't think that's the main purpose. In my opinion, the most important >> thing about 'const', and the reason why I use it where appropriate, is >> that it turns many dangerous constructs into constraint violations, >> making a diagnostic mandatory. Please please wrap your lines! > I never use it. Part of the reason is that whilst int member(const FOO *obj) > is clear enough in intention, in fact the constness of obj does not extend > to its members. Eh? What if FOO is in read only memory? > Another is the const-poisoning problem. You have to use const consistently, > or you end up needing to pass a const pointer to a non-const subroutine > which doesn't in fact alter the data. So good coding discipline is bad? > Then C++ added mutable. This makes a member of a const class non-const. > The fact that mutable was considered necessary is an argument against const. Mutable is rarely used in C++. Most of the cases in my own code are for internal state variables. > But the main reason is simply visual clutter. You want to be able to see > what a function does at a glance. Isn't whether the function modifies its arguments one of the most important things you want to see at a glance? -- Ian Collins
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Array sizes and const Les Cargill <lcargill99@comcast.com> - 2012-06-02 15:43 -0500
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-03 08:56 +1200
Re: Array sizes and const Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-02 16:59 -0400
Re: Array sizes and const Les Cargill <lcargill99@comcast.com> - 2012-06-02 16:35 -0500
Re: Array sizes and const jgk@panix.com (Joe keane) - 2012-06-08 20:05 +0000
Re: Array sizes and const jgk@panix.com (Joe keane) - 2012-06-09 21:36 +0000
Re: Array sizes and const Les Cargill <lcargill99@comcast.com> - 2012-06-02 16:43 -0500
Re: Array sizes and const Keith Thompson <kst-u@mib.org> - 2012-06-02 14:59 -0700
Re: Array sizes and const Les Cargill <lcargill99@comcast.com> - 2012-06-02 17:12 -0500
Re: Array sizes and const Keith Thompson <kst-u@mib.org> - 2012-06-02 18:27 -0700
Re: Array sizes and const Les Cargill <lcargill99@comcast.com> - 2012-06-02 22:27 -0500
Re: Array sizes and const "BartC" <bc@freeuk.com> - 2012-06-03 11:24 +0100
Re: Array sizes and const Keith Thompson <kst-u@mib.org> - 2012-06-03 13:51 -0700
Re: Array sizes and const "BartC" <bc@freeuk.com> - 2012-06-04 12:20 +0100
Re: Array sizes and const Jens Gustedt <jens.gustedt@loria.fr> - 2012-06-04 13:54 +0200
Re: Array sizes and const Keith Thompson <kst-u@mib.org> - 2012-06-04 14:32 -0700
Re: Array sizes and const Nobody <nobody@nowhere.com> - 2012-06-02 23:50 +0100
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-03 10:53 +1200
Re: Array sizes and const Nobody <nobody@nowhere.com> - 2012-06-03 14:35 +0100
Re: Array sizes and const James Kuyper <jameskuyper@verizon.net> - 2012-06-02 21:11 -0400
Re: Array sizes and const Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-06-03 07:39 -0700
Re: Array sizes and const James Kuyper <jameskuyper@verizon.net> - 2012-06-03 16:03 -0400
Re: Array sizes and const Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-03 21:49 +0100
Re: Array sizes and const Keith Thompson <kst-u@mib.org> - 2012-06-03 14:49 -0700
Re: Array sizes and const Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-06-03 15:02 -0700
Re: Array sizes and const Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-04 01:21 +0100
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-04 09:08 +1200
Re: Array sizes and const Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-06-03 15:08 -0700
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-04 10:37 +1200
Re: Array sizes and const "BartC" <bc@freeuk.com> - 2012-06-03 23:47 +0100
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-04 10:55 +1200
Re: Array sizes and const Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-06-03 16:04 -0700
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-04 11:14 +1200
Re: Array sizes and const "BartC" <bc@freeuk.com> - 2012-06-04 00:23 +0100
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-04 11:30 +1200
Re: Array sizes and const "BartC" <bc@freeuk.com> - 2012-06-04 00:52 +0100
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-04 12:04 +1200
Re: Array sizes and const Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-04 01:39 +0100
Re: Array sizes and const Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-06-04 02:35 -0700
Re: Array sizes and const Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-04 01:33 +0100
Re: Array sizes and const Ian Collins <ian-news@hotmail.com> - 2012-06-04 12:35 +1200
Re: Array sizes and const pacman@kosh.dhis.org (Alan Curry) - 2012-06-04 21:28 +0000
Re: Array sizes and const James Kuyper <jameskuyper@verizon.net> - 2012-06-04 12:08 -0400
Re: Array sizes and const jgk@panix.com (Joe keane) - 2012-06-04 22:49 +0000
Re: Array sizes and const David Brown <david.brown@hesbynett.no> - 2012-06-03 15:46 -0500
Re: Array sizes and const Tim Rentsch <txr@alumni.caltech.edu> - 2012-06-08 02:08 -0700
Re: Array sizes and const Les Cargill <lcargill99@comcast.com> - 2012-06-08 06:45 -0500
Re: Array sizes and const Tim Rentsch <txr@alumni.caltech.edu> - 2012-06-08 10:49 -0700
Re: Array sizes and const Les Cargill <lcargill99@comcast.com> - 2012-06-08 18:05 -0500
Re: Array sizes and const Keith Thompson <kst-u@mib.org> - 2012-06-08 13:31 -0700
Re: Array sizes and const Tim Rentsch <txr@alumni.caltech.edu> - 2012-06-08 20:30 -0700
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