diff options
Diffstat (limited to 'boost/math/special_functions/detail/polygamma.hpp')
| -rw-r--r-- | boost/math/special_functions/detail/polygamma.hpp | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/boost/math/special_functions/detail/polygamma.hpp b/boost/math/special_functions/detail/polygamma.hpp index 20a0292fb4..c0e4932907 100644 --- a/boost/math/special_functions/detail/polygamma.hpp +++ b/boost/math/special_functions/detail/polygamma.hpp @@ -11,7 +11,7 @@ #ifndef _BOOST_POLYGAMMA_DETAIL_2013_07_30_HPP_ #define _BOOST_POLYGAMMA_DETAIL_2013_07_30_HPP_ - #include <cmath> +#include <cmath> #include <limits> #include <boost/cstdint.hpp> #include <boost/math/policies/policy.hpp> @@ -27,7 +27,13 @@ #include <boost/static_assert.hpp> #include <boost/type_traits/is_convertible.hpp> - namespace boost { namespace math { namespace detail{ +#ifdef _MSC_VER +#pragma once +#pragma warning(push) +#pragma warning(disable:4702) // Unreachable code (release mode only warning) +#endif + +namespace boost { namespace math { namespace detail{ template<class T, class Policy> T polygamma_atinfinityplus(const int n, const T& x, const Policy& pol, const char* function) // for large values of x such as for x> 400 @@ -402,8 +408,18 @@ static boost::detail::lightweight_mutex m; boost::detail::lightweight_mutex::scoped_lock l(m); #endif + static int digits = tools::digits<T>(); static std::vector<std::vector<T> > table(1, std::vector<T>(1, T(-1))); + int current_digits = tools::digits<T>(); + + if(digits != current_digits) + { + // Oh my... our precision has changed! + table = std::vector<std::vector<T> >(1, std::vector<T>(1, T(-1))); + digits = current_digits; + } + int index = n - 1; if(index >= (int)table.size()) @@ -534,5 +550,9 @@ } } } // namespace boost::math::detail +#ifdef _MSC_VER +#pragma warning(pop) +#endif + #endif // _BOOST_POLYGAMMA_DETAIL_2013_07_30_HPP_ |