Re: [Boost-users] Unit testing Questions

From: Malte Clasen (news_at_[hidden])
Date: 2007-09-25 16:30:05

Thomas Thorp wrote:
> 3 - Is there a way to test for 1.#QNAN in a floating point value?  This is
> part of my initialization sequence.  "BOOST_CHECK_EQUAL" results a failure.

Although I don't know BOOST_CHECK_EQUAL, I suspect that i uses the == 
operator for floats and doubles. Since every comparison with NaN results 
in false, this won't work. However, TR1 incorporates the C99 isnan() 
function, according to 
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf , page 
163/164. If your compiler vendor doesn't support it, yet, you might want 
  to search the boost libraries for is_nan.

Malte