update boost

linx64/include/boost/math/tools/condition_numbers.hpp

@@ -6,9 +6,11 @@
 #ifndef BOOST_MATH_TOOLS_CONDITION_NUMBERS_HPP
 #define BOOST_MATH_TOOLS_CONDITION_NUMBERS_HPP
 #include <cmath>
+#include <limits>
 #include <boost/math/differentiation/finite_difference.hpp>
+#include <boost/math/tools/config.hpp>
 
-namespace boost::math::tools {
+namespace boost { namespace math { namespace tools {
 
 template<class Real, bool kahan=true>
 class summation_condition_number {
@@ -26,7 +28,7 @@ public:
         using std::abs;
         // No need to Kahan the l1 calc; it's well conditioned:
         m_l1 += abs(x);
-        if constexpr(kahan)
+        BOOST_IF_CONSTEXPR (kahan)
         {
             Real y = x - m_c;
             Real t = m_sum + y;
@@ -49,7 +51,7 @@ public:
     // but is this sensible? More important is it useful?
     // In addition, it might change the condition number.
 
-    [[nodiscard]] Real operator()() const
+    Real operator()() const
     {
         using std::abs;
         if (m_sum == Real(0) && m_l1 != Real(0))
@@ -59,7 +61,7 @@ public:
         return m_l1/abs(m_sum);
     }
 
-    [[nodiscard]] Real sum() const
+    Real sum() const
     {
         // Higham, 1993, "The Accuracy of Floating Point Summation":
         // "In [17] and [18], Kahan describes a variation of compensated summation in which the final sum is also corrected
@@ -67,7 +69,7 @@ public:
         return m_sum + m_c;
     }
 
-    [[nodiscard]] Real l1_norm() const
+    Real l1_norm() const
     {
         return m_l1;
     }
@@ -79,7 +81,7 @@ private:
 };
 
 template<class F, class Real>
-auto evaluation_condition_number(F const & f, Real const & x)
+Real evaluation_condition_number(F const & f, Real const & x)
 {
     using std::abs;
     using std::isnan;
@@ -93,15 +95,18 @@ auto evaluation_condition_number(F const & f, Real const & x)
     }
     bool caught_exception = false;
     Real fp;
+#ifndef BOOST_NO_EXCEPTIONS
     try
     {
+#endif
         fp = finite_difference_derivative(f, x);
+#ifndef BOOST_NO_EXCEPTIONS
     }
     catch(...)
     {
         caught_exception = true;
     }
-
+#endif
     if (isnan(fp) || caught_exception)
     {
         // Check if the right derivative exists:
@@ -135,5 +140,5 @@ auto evaluation_condition_number(F const & f, Real const & x)
     return abs(x*fp/fx);
 }
 
-}
+}}} // Namespaces
 #endif