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Groups > comp.lang.c > #147609
| From | Bonita Montero <Bonita.Montero@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Is this kosher wrt Generic? |
| Date | 2019-11-05 15:31 +0100 |
| Organization | albasani.net |
| Message-ID | <qps14d$8eg$1@news.albasani.net> (permalink) |
| References | (4 earlier) <a341d8ef-f5ad-4a31-b5e0-28d82caced31@googlegroups.com> <qprq74$rl6$1@news.albasani.net> <dbc11ea8-b3c1-4862-9e27-9d75708f7643@googlegroups.com> <qprs8v$nh8$1@news.albasani.net> <04fc519d-090a-4ecf-883f-b44309c3f5e2@googlegroups.com> |
> Chandler Carruth shows a optimization problem from a very simple
> unique_ptr that should disappear completely but this is not.
What stupid things is he doing with unique_ptrs?
You don't pass them as temporaries in this way. It's better to
void foo( unique_ptr<string> str )!
With this function you can only do something like this:
#include <iostream>
#include <memory>
using namespace std;
void foo( unique_ptr<string> str )
{
cout << *str << endl;
}
int main()
{
foo( unique_ptr<strign>( new string( "hello world" ) ) );
}
But this absolutely doesn't make sense because the string would
die at the same point where the unique_ptr dies.
So you could simply pass a temporary string object as well:
void foo( unique_ptr<string> str )!
With this function you can only do something like this:
#include <iostream>
#include <memory>
using namespace std;
void foo( string const &str )
{
cout << str << endl;
}
int main()
{
foo( string( "hello world" ) );
}
unique_ptrs are usually kept in a central place and normal pointers
whose lifetime are shorter than that of the unique_ptr are passed
around.
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Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-04 22:55 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 08:12 +0100
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-05 03:52 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 13:12 +0100
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-05 04:24 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 13:33 +0100
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-05 04:57 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 14:08 +0100
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-05 05:21 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 14:27 +0100
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-05 05:42 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 14:51 +0100
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-05 14:49 +0000
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 15:53 +0100
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-05 15:59 +0000
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 17:11 +0100
Re: Is this kosher wrt Generic? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-11-05 09:19 -0800
Re: Is this kosher wrt Generic? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-11-05 07:00 -0800
Re: Is this kosher wrt Generic? David Brown <david.brown@hesbynett.no> - 2019-11-05 16:30 +0100
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 15:31 +0100
Re: Is this kosher wrt Generic? Ian Collins <ian-news@hotmail.com> - 2019-11-06 10:34 +1300
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-05 22:16 +0000
Re: Is this kosher wrt Generic? Ian Collins <ian-news@hotmail.com> - 2019-11-06 11:34 +1300
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-05 23:12 +0000
Re: Is this kosher wrt Generic? Ian Collins <ian-news@hotmail.com> - 2019-11-06 12:29 +1300
Re: Is this kosher wrt Generic? David Brown <david.brown@hesbynett.no> - 2019-11-06 10:17 +0100
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-06 10:56 +0100
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-06 10:02 +0100
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-06 10:43 +0000
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-06 04:56 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-06 14:05 +0100
Re: Is this kosher wrt Generic? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-11-08 21:03 -0800
Re: Is this kosher wrt Generic? Ian Collins <ian-news@hotmail.com> - 2019-11-10 08:45 +1300
Re: Is this kosher wrt Generic? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-11-28 16:35 -0800
Re: Is this kosher wrt Generic? David Brown <david.brown@hesbynett.no> - 2019-11-29 12:41 +0100
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-29 04:08 -0800
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-29 13:01 +0000
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-29 06:43 -0800
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-29 17:31 +0000
Re: Is this kosher wrt Generic? David Brown <david.brown@hesbynett.no> - 2019-11-29 14:31 +0100
Re: Is this kosher wrt Generic? Öö Tiib <ootiib@hot.ee> - 2019-11-30 13:16 -0800
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-12-02 03:31 -0800
Re: Is this kosher wrt Generic? Öö Tiib <ootiib@hot.ee> - 2019-12-02 23:30 -0800
Re: Is this kosher wrt Generic? Ian Collins <ian-news@hotmail.com> - 2019-12-01 12:10 +1300
Re: Is this kosher wrt Generic? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-01-11 09:35 -0800
Re: Is this kosher wrt Generic? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-11-05 22:49 +0000
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-05 05:12 -0800
Re: Is this kosher wrt Generic? Bonita Montero <Bonita.Montero@gmail.com> - 2019-11-05 14:20 +0100
Re: Is this kosher wrt Generic? guinness.tony@gmail.com - 2019-11-05 16:19 -0800
Re: Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-06 00:06 -0800
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-05 03:19 -0800
Re: Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-05 22:38 -0800
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-06 04:50 -0800
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-06 05:32 -0800
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-06 05:56 -0800
Re: Is this kosher wrt Generic? Bart <bc@freeuk.com> - 2019-11-06 14:26 +0000
Re: Is this kosher wrt Generic? Thiago Adams <thiago.adams@gmail.com> - 2019-11-06 09:04 -0800
Re: Is this kosher wrt Generic? David Brown <david.brown@hesbynett.no> - 2019-11-06 22:45 +0100
Re: Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-29 14:35 -0800
Re: Is this kosher wrt Generic? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-11-29 23:23 +0000
Re: Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-29 19:08 -0800
Re: Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-29 19:12 -0800
Re: Is this kosher wrt Generic? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-11-30 10:44 +0000
Re: Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-09 23:21 -0800
Re: Is this kosher wrt Generic? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-11-09 23:22 -0800
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