[Boost-commit] svn:boost r78766 - trunk/boost/math/distributions

Subject: [Boost-commit] svn:boost r78766 - trunk/boost/math/distributions
From: pbristow_at_[hidden]
Date: 2012-05-30 12:31:18

Author: pbristow
Date: 2012-05-30 12:31:18 EDT (Wed, 30 May 2012)
New Revision: 78766
URL: http://svn.boost.org/trac/boost/changeset/78766

Log:
Changed range to include infinity if supported.
Text files modified: 
   trunk/boost/math/distributions/cauchy.hpp |    19 +++++++++++++++++--                     
   1 files changed, 17 insertions(+), 2 deletions(-)

Modified: trunk/boost/math/distributions/cauchy.hpp
==============================================================================
--- trunk/boost/math/distributions/cauchy.hpp	(original)
+++ trunk/boost/math/distributions/cauchy.hpp	2012-05-30 12:31:18 EDT (Wed, 30 May 2012)
@@ -180,15 +180,30 @@
 template <class RealType, class Policy>
 inline const std::pair<RealType, RealType> range(const cauchy_distribution<RealType, Policy>&)
 { // Range of permissible values for random variable x.
+  if (std::numeric_limits<RealType>::has_infinity)
+  { 
+     return std::pair<RealType, RealType>(-std::numeric_limits<RealType>::infinity(), std::numeric_limits<RealType>::infinity()); // - to + infinity.
+  }
+  else
+  { // Can only use max_value.
    using boost::math::tools::max_value;
-   return std::pair<RealType, RealType>(-max_value<RealType>(), max_value<RealType>()); // - to + infinity.
+   return std::pair<RealType, RealType>(-max_value<RealType>(), max_value<RealType>()); // - to + max.
+  }
 }
 
 template <class RealType, class Policy>
 inline const std::pair<RealType, RealType> support(const cauchy_distribution<RealType, Policy>& )
 { // Range of supported values for random variable x.
    // This is range where cdf rises from 0 to 1, and outside it, the pdf is zero.
-   return std::pair<RealType, RealType>(-tools::max_value<RealType>(), tools::max_value<RealType>()); // - to + infinity.
+  if (std::numeric_limits<RealType>::has_infinity)
+  { 
+     return std::pair<RealType, RealType>(-std::numeric_limits<RealType>::infinity(), std::numeric_limits<RealType>::infinity()); // - to + infinity.
+  }
+  else
+  { // Can only use max_value.
+     using boost::math::tools::max_value;
+     return std::pair<RealType, RealType>(-tools::max_value<RealType>(), max_value<RealType>()); // - to + max.
+  }
 }
 
 template <class RealType, class Policy>