[Boost-commit] svn:boost r47421 - in trunk: boost/math/special_functions libs/math/test

From: john_at_[hidden]
Date: 2008-07-14 12:22:04

Author: johnmaddock
Date: 2008-07-14 12:22:03 EDT (Mon, 14 Jul 2008)
New Revision: 47421
URL: http://svn.boost.org/trac/boost/changeset/47421

Log:
Fix for std libs that don't have denorm support in numeric_limits.
Text files modified: 
   trunk/boost/math/special_functions/next.hpp |     2 +-                                      
   trunk/libs/math/test/test_next.cpp          |    11 +++++++----                             
   2 files changed, 8 insertions(+), 5 deletions(-)

Modified: trunk/boost/math/special_functions/next.hpp
==============================================================================
--- trunk/boost/math/special_functions/next.hpp	(original)
+++ trunk/boost/math/special_functions/next.hpp	2008-07-14 12:22:03 EDT (Mon, 14 Jul 2008)
@@ -37,7 +37,7 @@
 template <class T>
 inline T get_smallest_value()
 {
-   return get_smallest_value<T>(mpl::bool_<std::numeric_limits<T>::is_specialized && std::numeric_limits<T>::has_denorm>());
+   return get_smallest_value<T>(mpl::bool_<std::numeric_limits<T>::is_specialized && (std::numeric_limits<T>::has_denorm == std::denorm_present)>());
 }
 
 }

Modified: trunk/libs/math/test/test_next.cpp
==============================================================================
--- trunk/libs/math/test/test_next.cpp	(original)
+++ trunk/libs/math/test/test_next.cpp	2008-07-14 12:22:03 EDT (Mon, 14 Jul 2008)
@@ -39,8 +39,11 @@
 
    BOOST_CHECK_EQUAL(float_distance(float_advance(val, 4), val), -4);
    BOOST_CHECK_EQUAL(float_distance(float_advance(val, -4), val), 4);
-   BOOST_CHECK_EQUAL(float_distance(float_advance(float_next(float_next(val)), 4), float_next(float_next(val))), -4);
-   BOOST_CHECK_EQUAL(float_distance(float_advance(float_next(float_next(val)), -4), float_next(float_next(val))), 4);
+   if(std::numeric_limits<T>::is_specialized && (std::numeric_limits<T>::has_denorm == std::denorm_present))
+   {
+      BOOST_CHECK_EQUAL(float_distance(float_advance(float_next(float_next(val)), 4), float_next(float_next(val))), -4);
+      BOOST_CHECK_EQUAL(float_distance(float_advance(float_next(float_next(val)), -4), float_next(float_next(val))), 4);
+   }
 }
 
 template <class T>
@@ -60,7 +63,7 @@
    test_value(-boost::math::tools::epsilon<T>(), name);
    test_value(boost::math::tools::min_value<T>(), name);
    test_value(-boost::math::tools::min_value<T>(), name);
-   if(std::numeric_limits<T>::is_specialized)
+   if(std::numeric_limits<T>::is_specialized && (std::numeric_limits<T>::has_denorm == std::denorm_present))
    {
       test_value(z, name);
       test_value(-z, name);
@@ -69,7 +72,7 @@
    test_value(-one, name);
    test_value(two, name);
    test_value(-two, name);
-   if(std::numeric_limits<T>::is_specialized && std::numeric_limits<T>::has_denorm)
+   if(std::numeric_limits<T>::is_specialized && (std::numeric_limits<T>::has_denorm == std::denorm_present))
    {
       test_value(std::numeric_limits<T>::denorm_min(), name);
       test_value(-std::numeric_limits<T>::denorm_min(), name);