summaryrefslogtreecommitdiff
path: root/boost/date_time/time_duration.hpp
diff options
context:
space:
mode:
Diffstat (limited to 'boost/date_time/time_duration.hpp')
-rw-r--r--boost/date_time/time_duration.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/boost/date_time/time_duration.hpp b/boost/date_time/time_duration.hpp
index 92a0e2d..58768bc 100644
--- a/boost/date_time/time_duration.hpp
+++ b/boost/date_time/time_duration.hpp
@@ -42,6 +42,8 @@ namespace date_time {
* either (haven't tried) */
{
public:
+ // A tag for type categorization. Can be used to detect Boost.DateTime duration types in generic code.
+ typedef void _is_boost_date_time_duration;
typedef T duration_type; //the subclass
typedef rep_type traits_type;
typedef typename rep_type::day_type day_type;