Update of /cvsroot/boost-sandbox/boost-sandbox/boost/units
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv8273/boost-sandbox/boost/units
Modified Files:
base_dimension.hpp
Log Message:
More comments + INTERNAL ONLY
Index: base_dimension.hpp
===================================================================
RCS file: /cvsroot/boost-sandbox/boost-sandbox/boost/units/base_dimension.hpp,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -d -r1.5 -r1.6
--- base_dimension.hpp 15 Apr 2007 01:47:05 -0000 1.5
+++ base_dimension.hpp 15 Apr 2007 02:09:19 -0000 1.6
@@ -39,12 +39,14 @@
}
-/// this must be in namespace boost::units so that ADL
+/// This must be in namespace boost::units so that ADL
/// will work with friend functions defined inline.
/// INTERNAL ONLY
template<long N>
struct long_ {};
+/// Ditto.
+/// INTERNAL ONLY
template<class T, long N>
struct base_dimension_pair {};
@@ -54,8 +56,8 @@
template<class T>
detail::no boost_units_prevent_double_definition(const T&) { return(detail::no()); }
-/// Defines a base dimensions. To define a dimension you need to provide
-/// the derived class and a unique integer.
+/// Defines a base dimension. To define a dimension you need to provide
+/// the derived class (CRTP) and a unique integer.
/// struct my_dimension : boost::units::base_dimension<my_dimension, 1> {};
/// It is designed so that you will get an error message if you try
/// to use the same value in multiple definitions.
@@ -66,7 +68,11 @@
sizeof(boost_units_prevent_double_definition(units::base_dimension_pair<Derived, N>())) != sizeof(detail::yes)
>::type>
struct base_dimension : mpl::long_<N> {
+ /// Register this ordinal
+ /// INTERNAL ONLY
friend detail::yes boost_units_prevent_double_definition(const units::long_<N>&) { return(detail::yes()); }
+ /// But make sure we can identify the current instantiation!
+ /// INTERNAL ONLY
friend detail::yes boost_units_prevent_double_definition(const units::base_dimension_pair<Derived, N>&) { return(detail::yes()); }
typedef base_dimension this_type;
typedef mpl::long_<N> value;
|
