[mlpack-git] master: Attempts to fix missing boost::math::policies::digits error (495f3c6)

[gitdub at mlpack.org]

Repository : https://github.com/mlpack/mlpack
On branch  : master
Link       : https://github.com/mlpack/mlpack/compare/ba850f782a53c5a77b7985f7647f609bd96cb5e7...2c026d838925df436d967439899813da5d34c702

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commit 495f3c659edaeba99b6f0e33731b0d7d5c25d998
Author: Yannis Mentekidis <mentekid at gmail.com>
Date:   Thu Jul 21 13:36:54 2016 +0100

    Attempts to fix missing boost::math::policies::digits error


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495f3c659edaeba99b6f0e33731b0d7d5c25d998
 src/mlpack/core/boost_backport/detail/polygamma.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mlpack/core/boost_backport/detail/polygamma.hpp b/src/mlpack/core/boost_backport/detail/polygamma.hpp
index e735d09..35b45ff 100644
--- a/src/mlpack/core/boost_backport/detail/polygamma.hpp
+++ b/src/mlpack/core/boost_backport/detail/polygamma.hpp
@@ -36,6 +36,15 @@
     template<class T>
     inline typename tools::promote_args<T>::type polygamma(const int n, T x);
 
+    namespace policies {
+
+      template <class T, class Policy>
+        inline int digits_base10(BOOST_MATH_EXPLICIT_TEMPLATE_TYPE(T)) 
+        {
+          return boost::math::policies::digits<T, Policy>() * 301 / 1000L;
+        }
+    }
+    
   }}
 
   namespace boost { namespace math { namespace detail{