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        riddles >> cs >> Dark corners of C
        
(Message started by: Barukh on Mar 25^th, 2013, 5:09am)

Title: Dark corners of C
Post by Barukh on Mar 25^th, 2013, 5:09am

It's not a puzzle, but it's cool (https://docs.google.com/presentation/d/1h49gY3TSiayLMXYmRMaAEMl05FaJ-Z6jDOWOz3EsqqQ/preview#slide=id.p).

Title: Re: Dark corners of C
Post by peoplepower on Mar 25^th, 2013, 5:37am

It turns out that auto was a good placeholder for a useful keyword in C++11.

Title: Re: Dark corners of C
Post by Grimbal on Mar 25^th, 2013, 5:40am

I hope it doesn't break the code that is making use of that keyword. ::)

Title: Re: Dark corners of C
Post by peoplepower on Mar 25^th, 2013, 6:03am

Indeed, I cannot compile things like
auto int i = 0;
in the new standard.

Hm.. I would be hardpressed to figure out some ambiguous usage of auto.

Title: Re: Dark corners of C
Post by SMQ on Mar 25^th, 2013, 12:20pm

on 03/25/13 at 06:03:31, peoplepower wrote:

Hm.. I would be hardpressed to figure out some ambiguous usage of auto.

double a = 0.0; auto b = a;
In C, b will be an int (because a missing type implies int); in C++0x, b will be a double (because the type of an auto variable is implied by the type of the expression assigned to it).

Fortunately, in earlier versions of C++ this is a compiler error, because the missing-type-implies-int rule is only in straight C, not C++. So it's only a potential ambiguity if you're attempting to compile straight-C code as C++0x.

--SMQ

Title: Re: Dark corners of C
Post by peoplepower on Mar 25^th, 2013, 6:10pm

Wow, I did not know that (probably for good reason).

Title: Re: Dark corners of C
Post by bal on Jul 5^th, 2014, 7:41am

It's great, I've never heard about these stuffs :)

Title: Re: Dark corners of C
Post by JaneBD on Aug 5^th, 2014, 3:10pm

I've never heard of this ... what exactly is "Dark corners of C" - I get you're referring to the programming language, but is there something new I've not learnt about it?

Title: Re: Dark corners of C
Post by towr on Aug 5^th, 2014, 11:24pm

Just click the link and read the presentation.
It's things you can, but probably shouldn't, do in C, because they're weird and/or evil.

Title: Re: Dark corners of C
Post by JaneBD on Aug 6^th, 2014, 6:11am

That's actually pretty cool, thanks for sharing it (: