[Boost-sandbox-cvs] boost-sandbox/boost/units static_rational.hpp, 1.1.1.1, 1.2

[Steven W. <ste...@us...>]

Update of /cvsroot/boost-sandbox/boost-sandbox/boost/units
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv15003/boost-sandbox/boost/units

Modified Files:
	static_rational.hpp 
Log Message:
Added mpl arithmetic

Index: static_rational.hpp
===================================================================
RCS file: /cvsroot/boost-sandbox/boost-sandbox/boost/units/static_rational.hpp,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -u -d -r1.1.1.1 -r1.2
--- static_rational.hpp	16 Mar 2007 18:12:42 -0000	1.1.1.1
+++ static_rational.hpp	4 Apr 2007 19:14:27 -0000	1.2
@@ -16,6 +16,8 @@
 
 #include <boost/math/common_factor.hpp>
 
+#include <boost/mpl/arithmetic.hpp>
+
 #include <boost/units/operators.hpp>
 
 /// \file 
@@ -25,6 +27,12 @@
 
 namespace units { 
 
+namespace detail {
+
+struct static_rational_tag {};
+
+}
+
 typedef long   integer_type;
 
 /// Compile time absolute value.
@@ -66,6 +74,7 @@
             static_cast<integer_type>(boost::math::static_gcd<nabs,dabs>::value);
         
     public:   
+        typedef detail::static_rational_tag tag;
         static const integer_type   Numerator = N/den,
                                     Denominator = D/den;
         
@@ -323,6 +332,57 @@
 
 } // namespace units
 
+namespace mpl {
+
+template<>
+struct plus_impl<boost::units::detail::static_rational_tag, boost::units::detail::static_rational_tag>
+{
+    template<class T0, class T1>
+    struct apply {
+        typedef typename boost::units::static_add<T0, T1>::type type;
+    };
+};
+
+template<>
+struct minus_impl<boost::units::detail::static_rational_tag, boost::units::detail::static_rational_tag>
+{
+    template<class T0, class T1>
+    struct apply {
+        typedef typename boost::units::static_subtract<T0, T1>::type type;
+    };
+};
+
+template<>
+struct times_impl<boost::units::detail::static_rational_tag, boost::units::detail::static_rational_tag>
+{
+    template<class T0, class T1>
+    struct apply {
+        typedef typename boost::units::static_multiply<T0, T1>::type type;
+    };
+};
+
+template<>
+struct divides_impl<boost::units::detail::static_rational_tag, boost::units::detail::static_rational_tag>
+{
+    template<class T0, class T1>
+    struct apply {
+        typedef typename boost::units::static_divide<T0, T1>::type type;
+    };
+};
+
+template<>
+struct negate_impl<boost::units::detail::static_rational_tag>
+{
+    template<class T0>
+    struct apply {
+        typedef typename boost::units::static_negate<T0>::type type;
+    };
+};
+
+
+
+}
+
 } // namespace boost
 
 #endif // BOOST_UNITS_STATIC_RATIONAL_HPP