AMDG Olaf Peter wrote:
I'm checking some data of consistence using boost's unit test framework (1.42):
BOOST_CHECK_CLOSE( *v[1].y.max, -43.0e-3, std::numeric_limits<double>::epsilon() );
which fails with:
difference{1.6137e-14%} between *v[1].y.max{-0.043000000000000003} and -43.0e-3{-0.042999999999999997} exceeds 2.2204460492503131e-16%
where v is a std::vector,y a struct and max a boost::optional<double>. The data where parsed by boost.spirit. This is the only failed test case from 16 parsed doubles. What's gone wrong here? Do I miss something?
epsilon is too small. BOOST_CHECK_CLOSE treats the argument as a percent, so there's an extra factor of 0.01, which means that this comparison is effectively for equality. In Christ, Steven Watanabe