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Groups > comp.lang.c > #105823
| From | jacobnavia <jacob@jacob.remcomp.fr> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: lambda functions in C |
| Date | 2017-03-11 21:45 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <oa1ngf$7ml$1@dont-email.me> (permalink) |
| References | <da2ac707-2a39-41c2-9ac4-20c4811318e8@googlegroups.com> |
Le 08/03/2017 à 19:04, Thiago Adams a écrit :
>
> One feature I miss from C++ is lambdas expressions.
>
> In C++, we can create a function pointer like this:
>
> int (*F)(int) = [](int i) -> int
> {
> return i * 2;
> };
>
> F(1);
>
> and also pass it as a function argument.
>
> void F2(int (*F)(int));
>
> F2([](int i) -> int
> {
> return i * 2;
> });
>
> When a C++ lambda doesn't have any capture of variables
> ( the [] part ) it is convertible to normal function pointer.
>
> This feature could be added as it is into the C language.
> The generated code is an internal linkage anonymous function.
>
What about
int anonymousFunction1(int i)
{
return i*2;
}
int (*F2)(int);
F2 = anonymousFunction1;
> This is a kind of feature I would add in my C' extensions.
>
> My question is what would be the syntax for C? Like C++?
>
What's wrong with the current syntax? It should be fairly easy to write
a macro to shorten the typing or have a keyboard shortcut in the IDE.
> I think the possible syntax for C could be something similar
> of struct initializer.
>
>
> typedef struct{
> int x;
> int y;
> } Point;
>
> void F(Point pt){}
>
> Point pt = { .x = 1, .y = 2};
> F((Point){ .x = 1, .y = 2});
>
And why not
Point NewPoint(int x,int y);
????
Why make it obfuscated when we can write it clearly like that?
> Using an similar syntax:
>
> int (*F)(int) = int (*)(int i){ return 2*i; }
>
> F2(int (*)(int i)
> { return 2*i;
> });
>
> What do think?
Maybe, but that looks fairly incomprehensible to do the same thing...
> Do you see any problem to parse this?
No, the problem is not parsing.
I just do not see what this obfuscated syntax brings as improvement.
> Would you prefer the C++ syntax?
>
I would prefer the C syntax.
> I assume everyone would agree that this feature is useful.
> If not, why?
>
I do not see what do you want to do, i.e. a practical application of
that syntax.
Or such.
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lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-08 10:04 -0800
Re: lambda functions in C BartC <bc@freeuk.com> - 2017-03-08 18:20 +0000
Re: lambda functions in C Chad <cdalten@gmail.com> - 2017-03-08 11:12 -0800
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-08 11:36 -0800
Re: lambda functions in C scott@slp53.sl.home (Scott Lurndal) - 2017-03-08 20:43 +0000
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-08 21:55 +0100
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-08 13:18 -0800
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-10 12:44 -0800
Re: lambda functions in C Chad <cdalten@gmail.com> - 2017-03-08 13:03 -0800
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-08 11:33 -0800
Re: lambda functions in C scott@slp53.sl.home (Scott Lurndal) - 2017-03-08 20:46 +0000
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-08 13:25 -0800
Re: lambda functions in C "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-03-10 13:55 -0500
Re: lambda functions in C supercat@casperkitty.com - 2017-03-10 11:09 -0800
Re: lambda functions in C "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-03-10 14:51 -0500
Re: lambda functions in C BartC <bc@freeuk.com> - 2017-03-10 19:19 +0000
Re: lambda functions in C "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-03-10 14:53 -0500
Re: lambda functions in C BartC <bc@freeuk.com> - 2017-03-11 14:17 +0000
Re: lambda functions in C "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-03-11 06:55 -0800
Re: lambda functions in C "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-03-11 07:05 -0800
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-08 13:55 -0800
Re: lambda functions in C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-08 23:41 +0000
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-09 05:03 -0800
Re: lambda functions in C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-09 14:06 +0000
Re: lambda functions in C BartC <bc@freeuk.com> - 2017-03-09 14:20 +0000
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-09 08:07 -0800
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-09 21:50 +0100
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-09 23:38 +0100
Re: lambda functions in C Ike Naar <ike@iceland.freeshell.org> - 2017-03-09 22:46 +0000
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 08:39 +0100
Re: lambda functions in C Ike Naar <ike@iceland.freeshell.org> - 2017-03-10 08:03 +0000
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 09:22 +0100
Re: lambda functions in C Ike Naar <ike@iceland.freeshell.org> - 2017-03-10 19:24 +0000
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 23:23 +0100
Re: lambda functions in C Ike Naar <ike@iceland.freeshell.org> - 2017-03-11 18:02 +0000
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-09 20:48 -0500
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 08:57 +0100
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-10 11:26 -0500
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 17:53 +0100
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-10 13:17 -0500
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-11 17:11 +0100
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-10 00:38 -0800
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 10:23 +0100
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-10 11:37 -0500
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-10 09:07 -0800
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-10 13:22 -0500
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-10 10:47 -0800
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-10 14:57 -0500
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-10 12:26 -0800
Re: lambda functions in C Chad <cdalten@gmail.com> - 2017-03-10 12:49 -0800
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 23:32 +0100
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-11 12:26 -0500
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-11 17:17 +0100
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-11 10:26 -0800
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-11 19:48 +0100
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-11 12:02 -0800
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-12 09:14 +1300
Re: lambda functions in C "James R. Kuyper" <jameskuyper@verizon.net> - 2017-03-11 15:44 -0500
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-12 09:51 +1300
Re: lambda functions in C "James R. Kuyper" <jameskuyper@verizon.net> - 2017-03-11 16:11 -0500
Re: lambda functions in C jacobnavia <jacob@jacob.remcomp.fr> - 2017-03-11 22:21 +0100
Re: lambda functions in C jameskuyper@verizon.net - 2017-03-11 13:36 -0800
Re: lambda functions in C jacobnavia <jacob@jacob.remcomp.fr> - 2017-03-11 23:48 +0100
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-12 11:55 +1300
Re: lambda functions in C "James R. Kuyper" <jameskuyper@verizon.net> - 2017-03-11 18:34 -0500
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-12 15:23 +1300
Re: lambda functions in C BartC <bc@freeuk.com> - 2017-03-12 11:42 +0000
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-12 13:49 +0100
Re: lambda functions in C "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-03-12 10:56 -0700
Re: lambda functions in C jameskuyper@verizon.net - 2017-03-11 15:30 -0800
Re: lambda functions in C jacobnavia <jacob@jacob.remcomp.fr> - 2017-03-12 00:37 +0100
Re: lambda functions in C Keith Thompson <kst-u@mib.org> - 2017-03-11 17:23 -0800
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-12 14:32 +0100
Re: lambda functions in C Gareth Owen <gwowen@gmail.com> - 2017-03-12 07:22 +0000
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-12 11:10 +1300
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-12 11:08 +1300
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-12 00:17 +0100
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-12 14:14 +0100
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-12 09:54 -0400
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-12 15:10 +0100
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-12 08:08 -0700
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-12 16:49 +0100
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-12 14:28 -0400
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-13 00:03 +0100
Re: lambda functions in C Jerry Stuckle <jstucklex@attglobal.net> - 2017-03-12 19:15 -0400
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-12 18:18 +0100
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-12 10:42 -0700
Re: lambda functions in C David Brown <david.brown@hesbynett.no> - 2017-03-12 20:53 +0100
Re: lambda functions in C supercat@casperkitty.com - 2017-03-10 07:09 -0800
Re: lambda functions in C supercat@casperkitty.com - 2017-03-10 08:56 -0800
Re: lambda functions in C GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-03-10 08:49 +0100
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-09 04:12 -0800
Re: lambda functions in C Alain Ketterlin <alain@universite-de-strasbourg.fr.invalid> - 2017-03-09 10:38 +0100
Re: lambda functions in C Siri Cruise <chine.bleu@yahoo.com> - 2017-03-09 08:48 -0800
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-09 09:45 -0800
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-09 09:51 -0800
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-09 09:50 -0800
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-09 11:08 -0800
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-10 08:22 +1300
Re: lambda functions in C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-03-09 12:12 -0800
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-09 11:29 -0800
Re: lambda functions in C Siri Cruise <chine.bleu@yahoo.com> - 2017-03-09 13:33 -0800
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-09 13:42 -0800
Re: lambda functions in C Ian Collins <ian-news@hotmail.com> - 2017-03-10 11:02 +1300
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-09 14:30 -0800
Re: lambda functions in C Siri Cruise <chine.bleu@yahoo.com> - 2017-03-09 15:07 -0800
Re: lambda functions in C jacobnavia <jacob@jacob.remcomp.fr> - 2017-03-11 21:45 +0100
Re: lambda functions in C Thiago Adams <thiago.adams@gmail.com> - 2017-03-13 06:13 -0700
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