--- /usr/include/boost/type_traits/detail/has_binary_operator.hpp   2018-07-04 12:20:14.687475843 +0200
+++ /tmp/has_binary_operator.hpp    2018-07-04 12:23:58.763291879 +0200
@@ -47,9 +47,7 @@
 namespace detail {

 // This namespace ensures that argument-dependent name lookup does not mess things up.
-#ifndef Q_MOC_RUN
 namespace BOOST_JOIN(BOOST_TT_TRAIT_NAME,_impl) {
-//namespace BOOST_JOIN(BOOST_TT_TRAIT_NAME,_impl) {

 // 1. a function to have an instance of type T without requiring T to be default
 // constructible
@@ -217,7 +215,6 @@
 };

 } // namespace impl
-#endif
 } // namespace detail

 // this is the accessible definition of the trait to end user