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Re: [OT] calling isnan
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Re: [OT] calling isnan

  • Subject: Re: [OT] calling isnan
  • From: Chris Espinosa <email@hidden>
  • Date: Fri, 18 Feb 2005 13:22:00 -0800
Apparently <cmath> is supposed to #undef isnan, according to the C standard. (Why, I'm not sure, but it is.) What it ought to do is to define <T>isnan() in the std:: namespace, but it's apparently not doing so for doubles.

See this: http://gcc.gnu.org/ml/gcc/2005-01/msg00577.html

As a workaround you can use the __isnand(x) underlying function for doubles.

Regards,

Chris

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References: 
 >[OT] calling isnan (From: Fred Bacon <email@hidden>)
 >Re: [OT] calling isnan (From: Chris Espinosa <email@hidden>)
 >Re: [OT] calling isnan (From: Fred Bacon <email@hidden>)

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