diff options
Diffstat (limited to 'boost/test/tools/detail/print_helper.hpp')
| -rw-r--r-- | boost/test/tools/detail/print_helper.hpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/boost/test/tools/detail/print_helper.hpp b/boost/test/tools/detail/print_helper.hpp index 77b936c44b..39ab707f36 100644 --- a/boost/test/tools/detail/print_helper.hpp +++ b/boost/test/tools/detail/print_helper.hpp @@ -22,9 +22,12 @@ // Boost #include <boost/mpl/or.hpp> +#include <boost/static_assert.hpp> #include <boost/type_traits/is_array.hpp> #include <boost/type_traits/is_function.hpp> #include <boost/type_traits/is_abstract.hpp> +#include <boost/type_traits/has_left_shift.hpp> + #include <limits> #include <boost/test/detail/suppress_warnings.hpp> @@ -41,6 +44,9 @@ namespace tt_detail { template<typename T> struct print_log_value { + BOOST_STATIC_ASSERT_MSG( (boost::has_left_shift<std::ostream,T>::value), + "Type has to implement operator<< to be printable"); + void operator()( std::ostream& ostr, T const& t ) { typedef typename mpl::or_<is_array<T>,is_function<T>,is_abstract<T> >::type cant_use_nl; |