Re: Cmath and math.h Changes in Xcode 2.4 (Mike Jackson)
Re: Cmath and math.h Changes in Xcode 2.4 (Mike Jackson)
- Subject: Re: Cmath and math.h Changes in Xcode 2.4 (Mike Jackson)
- From: Mike Jackson <email@hidden>
- Date: Tue, 29 Aug 2006 16:56:17 -0400
- Thread-topic: Cmath and math.h Changes in Xcode 2.4 (Mike Jackson)
On 8/29/06 4:46 PM, "E. Wing" <email@hidden> wrote:
>> Looking around it seems the "safer" way to do this is to use the
>> #define isnan(x) std::isnan(x)
>>
>
> This is very bad because if you have any code that calls std::isnan
> directly (which is legitimate) i.e.
> #include <cmath>
> int main() {
> std::isnan(0);
> return 0;
> }
>
> Then the #define you suggest will transform the call to
> std::std::isnan(0);
> which is invalid.
>
> If the #define is in a public header (like it is for OpenSceneGraph),
> this risks breaking a lot code for people.
>
> -Eric
As I am learning quickly, there is no "standard" in C++ so everyone does it
differently. So OpenSceneGraph will have to do it one way and ITK will have
to do it another way..
--
Mike Jackson
imikejackson <at> gmail <dot> com
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