Hi, <div><br></div><div>This bit of Boost.Test code fails:</div><div><br></div><div>//////////////////////////////////////////////////////////////////////</div><div>BOOST_AUTO_TEST_CASE( nantest )</div><div>{</div><div>  float a,b;</div>

<div>  a = b = 1.0;</div><div>  BOOST_CHECK_EQUAL( a, b );  // passes</div><div>  a = b = NAN;</div><div>  BOOST_CHECK_EQUAL( a, b );  // fails</div><div>}</div><div>//////////////////////////////////////////////////////////////////////</div>

<div><br></div><div>The failure is because, by definition, NAN != NAN. What I&#39;m after is a test macro which takes this into account and will pass the equality test when both elements are NAN. </div><div><br></div><div>

BOOST_CHECK_CLOSE has the same behaviour.  Is the best solution to write my own custom predicate? </div><div><br></div><div>Brian</div><div><br></div><div><br></div><div><br></div>