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-rw-r--r--boost/exception/info_tuple.hpp24
1 files changed, 24 insertions, 0 deletions
diff --git a/boost/exception/info_tuple.hpp b/boost/exception/info_tuple.hpp
index 34afe421b1..bf1be15da2 100644
--- a/boost/exception/info_tuple.hpp
+++ b/boost/exception/info_tuple.hpp
@@ -19,6 +19,30 @@ namespace
boost
{
template <
+ class E >
+ inline
+ E const &
+ operator<<(
+ E const & x,
+ tuple< > const & v )
+ {
+ return x;
+ }
+
+ template <
+ class E,
+ class Tag1,class T1 >
+ inline
+ E const &
+ operator<<(
+ E const & x,
+ tuple<
+ error_info<Tag1,T1> > const & v )
+ {
+ return x << v.template get<0>();
+ }
+
+ template <
class E,
class Tag1,class T1,
class Tag2,class T2 >