Re: [boost] Patches for Octonion/quaternion libs

From: Beman Dawes (bdawes_at_[hidden])
Date: 2003-12-31 12:44:24

At 07:07 AM 12/31/2003, John Maddock wrote:
 > ====== BEGIN OUTPUT ======
 >> Running 18 test cases...
 >> ../../../libs/math/quaternion/quaternion_test.cpp(576): error in
 >> "::boost::bind(static_cast < void (*) (const char *) >(&exp_test<long
 >> double>), "long double")": test
 >> ::std::less_equal<T>()(abs(exp(::boost::math::quaternion<T>
 >> (0,4*atan(static_cast<T>(1)),0,0))+static_cast<T>(1)),
 >> 2*numeric_limits<T>::epsilon()) failed for (1.22465e-16, 2.1684e-19)
 >
 >...snipped...
 >
 >> Which all look rather worrying, anyone any ideas what's going on here?
 >
 >Further testing suggests that this is a numeric_limits issue: the tests 
do
 >pass on linux and with mingw32 gcc 3.3, but fail as above on cygwin,
 >strange...  anyway patches applied (to main branch only).

On the Win32 tests, the change:

* Had no effect on the gcc 3.3.1 results.
* Caused two Intel 8.0 tests to change from fail to pass.
* Caused four Metrowerks tests to change from pass to fail.

See the results just posted at 
http://boost.sourceforge.net/regression-logs/

--Beman