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-rw-r--r--boost/units/systems/detail/constants.hpp68
1 files changed, 68 insertions, 0 deletions
diff --git a/boost/units/systems/detail/constants.hpp b/boost/units/systems/detail/constants.hpp
index fac9b61..cf156f7 100644
--- a/boost/units/systems/detail/constants.hpp
+++ b/boost/units/systems/detail/constants.hpp
@@ -20,6 +20,8 @@
#include <boost/units/static_constant.hpp>
#include <boost/units/units_fwd.hpp>
#include <boost/units/operators.hpp>
+#include <boost/units/static_rational.hpp>
+#include <boost/units/detail/one.hpp>
namespace boost {
@@ -134,6 +136,72 @@ BOOST_UNITS_DEFINE_HELPER(divide, /)
#undef BOOST_UNITS_DEFINE_HELPER
+#define BOOST_UNITS_DEFINE_HELPER(name, symbol) \
+ \
+template<class T1> \
+struct name ## _typeof_helper<constant<T1>, one> \
+{ \
+ typedef typename name ## _typeof_helper<typename T1::value_type, one>::type type;\
+}; \
+ \
+template<class T2> \
+struct name ## _typeof_helper<one, constant<T2> > \
+{ \
+ typedef typename name ## _typeof_helper<one, typename T2::value_type>::type type;\
+}; \
+ \
+template<class T1> \
+typename name ## _typeof_helper<typename T1::value_type, one>::type \
+operator symbol(const constant<T1>& t, const one& u) \
+{ \
+ return(t.value() symbol u); \
+} \
+ \
+template<class T2> \
+typename name ## _typeof_helper<one, typename T2::value_type>::type \
+operator symbol(const one& t, const constant<T2>& u) \
+{ \
+ return(t symbol u.value()); \
+}
+
+BOOST_UNITS_DEFINE_HELPER(multiply, *)
+BOOST_UNITS_DEFINE_HELPER(divide, /)
+
+#undef BOOST_UNITS_DEFINE_HELPER
+
+template<class T1, long N, long D>
+struct power_typeof_helper<constant<T1>, static_rational<N,D> >
+{
+ typedef power_typeof_helper<typename T1::value_type, static_rational<N,D> > base;
+ typedef typename base::type type;
+ static type value(const constant<T1>& arg)
+ {
+ return base::value(arg.value());
+ }
+};
+
+#define BOOST_UNITS_DEFINE_HELPER(name, symbol) \
+ \
+template<class T1, class E> \
+struct name ## _typeof_helper<constant<T1> > \
+{ \
+ typedef typename name ## _typeof_helper<typename T1::value_type, E>::type type;\
+}; \
+ \
+template<class T1> \
+typename name ## _typeof_helper<typename T1::value_type, one>::type \
+operator symbol(const constant<T1>& t, const one& u) \
+{ \
+ return(t.value() symbol u); \
+} \
+ \
+template<class T2> \
+typename name ## _typeof_helper<one, typename T2::value_type>::type \
+operator symbol(const one& t, const constant<T2>& u) \
+{ \
+ return(t symbol u.value()); \
+}
+
#define BOOST_UNITS_PHYSICAL_CONSTANT(name, type, value_, uncertainty_) \
struct name ## _t { \
typedef type value_type; \