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Topic: Dark corners of C (Read 10600 times) |
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Barukh
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Dark corners of C
« on: Mar 25th, 2013, 5:09am » |
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It's not a puzzle, but it's cool.
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peoplepower
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Re: Dark corners of C
« Reply #1 on: Mar 25th, 2013, 5:37am » |
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It turns out that auto was a good placeholder for a useful keyword in C++11.
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Grimbal
wu::riddles Moderator
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Re: Dark corners of C
« Reply #2 on: Mar 25th, 2013, 5:40am » |
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I hope it doesn't break the code that is making use of that keyword. 
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peoplepower
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Re: Dark corners of C
« Reply #3 on: Mar 25th, 2013, 6:03am » |
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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.
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SMQ
wu::riddles Moderator
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Re: Dark corners of C
« Reply #4 on: Mar 25th, 2013, 12:20pm » |
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on Mar 25th, 2013, 6:03am, peoplepower wrote:| Hm.. I would be hardpressed to figure out some ambiguous usage of auto. |
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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
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| « Last Edit: Mar 25th, 2013, 12:22pm by SMQ » |
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--SMQ
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peoplepower
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Posts: 63
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Re: Dark corners of C
« Reply #5 on: Mar 25th, 2013, 6:10pm » |
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Wow, I did not know that (probably for good reason).
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JaneBD
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Re: Dark corners of C
« Reply #7 on: Aug 5th, 2014, 3:10pm » |
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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?
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"Do or Do not, there is no try" - Yoda
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towr
wu::riddles Moderator
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Some people are average, some are just mean.
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Re: Dark corners of C
« Reply #8 on: Aug 5th, 2014, 11:24pm » |
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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.
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Wikipedia, Google, Mathworld, Integer sequence DB
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JaneBD
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Re: Dark corners of C
« Reply #9 on: Aug 6th, 2014, 6:11am » |
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That's actually pretty cool, thanks for sharing it (:
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"Do or Do not, there is no try" - Yoda
A Work in Progress
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