Imported Upstream version 1.72.0

[platform/upstream/boost.git] / boost / histogram / axis / ostream.hpp

diff --git a/boost/histogram/axis/ostream.hpp b/boost/histogram/axis/ostream.hpp
index 5a7295a..ca307a5 100644 (file)
--- a/boost/histogram/axis/ostream.hpp
+++ b/boost/histogram/axis/ostream.hpp
@@ -11,13 +11,13 @@
 
 #include <boost/assert.hpp>
 #include <boost/histogram/axis/regular.hpp>
-#include <boost/histogram/detail/cat.hpp>
 #include <boost/histogram/detail/static_if.hpp>
 #include <boost/histogram/detail/type_name.hpp>
 #include <boost/histogram/fwd.hpp>
 #include <boost/throw_exception.hpp>
 #include <iomanip>
 #include <iosfwd>
+#include <sstream>
 #include <stdexcept>
 #include <type_traits>
 
@@ -182,11 +182,7 @@ std::basic_ostream<Ts...>& operator<<(std::basic_ostream<Ts...>& os,
         using A = std::decay_t<decltype(x)>;
         detail::static_if<detail::is_streamable<A>>(
             [&os](const auto& x) { os << x; },
-            [](const auto&) {
-              BOOST_THROW_EXCEPTION(std::runtime_error(
-                  detail::cat(detail::type_name<A>(), " is not streamable")));
-            },
-            x);
+            [&os](const auto&) { os << "<unstreamable>"; }, x);
       },
       v);
   return os;