rename `Mantissa` to `Base`

dune/common/math.hh

@@ -67,20 +67,20 @@ namespace Dune
 
   /** \brief Power method for integer exponents
    *
-   * \note Make sure that Mantissa is a non-integer type when using negative exponents!
+   * \note Make sure that Base is a non-integer type when using negative exponents!
    */
-  template <class Mantissa, class Exponent>
-  constexpr Mantissa power(Mantissa m, Exponent p)
+  template <class Base, class Exponent>
+  constexpr Base power(Base m, Exponent p)
   {
     static_assert(std::numeric_limits<Exponent>::is_integer, "Exponent must be an integer type!");
 
-    auto result = Mantissa(1);
+    auto result = Base(1);
     auto absp = (p<0) ? -p : p;   // This is simply abs, but std::abs is not constexpr
     for (Exponent i = Exponent(0); i<absp; i++)
       result *= m;
 
     if (p<0)
-      result = Mantissa(1)/result;
+      result = Base(1)/result;
 
     return result;
   }

dune/common/power.hh

@@ -16,18 +16,18 @@ namespace Dune {
        @{
    */
 
-  /** \brief Calculates m^p at compile time
+  /** \brief Calculates b^p at compile time
    * \deprecated Please use the method `power` from `math.hh` instead!
    */
-  template <int m, int p>
+  template <int b, int p>
   struct StaticPower
   {
-    /** \brief power stores m^p */
-    static constexpr int power = Dune::power(m,p);
+    /** \brief power stores b^p */
+    static constexpr int power = Dune::power(b,p);
   };
 
 
-  /** \brief Compute power for a run-time mantissa and a compile-time integer exponent
+  /** \brief Compute power for a run-time base and a compile-time integer exponent
    *
    * \deprecated Please use the method `power` from `math.hh` instead!
    *