A first implementation of Mathematical Constants (for discussion)

[[Imported from SVN: r6436]]

dune/common/Makefile.am

@@ -57,6 +57,7 @@ commoninclude_HEADERS = 			\
 	iteratorfacades.hh			\
 	lcm.hh					\
 	lru.hh					\
+	math.hh					\
 	matvectraits.hh \
 	misc.hh					\
 	mpicollectivecommunication.hh		\

dune/common/math.hh

+// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+// vi: set et ts=4 sw=2 sts=2:
+#ifndef DUNE_MATH_HH
+#define DUNE_MATH_HH
+
+#include <cmath>
+
+namespace Dune
+{
+
+  template< class Field >
+  struct MathematicalConstants;
+
+
+
+  // MathematicalConstants for double
+  // --------------------------------
+
+  template<>
+  struct MathematicalConstants< double >
+  {
+    static double e () { return std::exp( 1.0 ); }
+    static double pi () { return std::acos( -1.0 ); }
+  };
+
+
+
+  // MathematicalConstants for float
+  // -------------------------------
+
+  template<>
+  struct MathematicalConstants< float >
+  {
+    static float e () { return std::exp( 1.0f ); }
+    static float pi () { return std::acos( -1.0f ); }
+  };
+
+}
+
+#endif // #ifndef DUNE_MATH_HH