20 namespace bh = boost::hana;
86             bh::tuple<ref<term<double> &>, term<int>>>;  in test_main()
90             ref<term<double> &> ref = bh::front(plus_expr.elements);  in test_main()
96             ref<term<double> &> ref = bh::front(plus_expr.elements);  in test_main()
101             ref<term<double> &> const ref = bh::front(plus_expr.elements);  in test_main()
109                 bh::tuple<ref<term<double> const &>, term<int>>>  in test_main()
113                 ref<term<double> const &> ref = bh::front(plus_expr.elements);  in test_main()
120                 ref<term<double> const &> ref = bh::front(plus_expr.elements);  in test_main()
126                 ref<term<double> const &> const ref = bh::front(plus_expr.elements);  in test_main()
157             bh::tuple<user_ref<user_term<double> &>, user_term<int>>>;  in test_main()
161             user_ref<user_term<double> &> ref = bh::front(plus_expr.elements);  in test_main()
167             user_ref<user_term<double> &> ref = bh::front(plus_expr.elements);  in test_main()
172             user_ref<user_term<double> &> const ref = bh::front(plus_expr.elements);  in test_main()
180                 bh::tuple<user_ref<user_term<double> const &>, user_term<int>>>  in test_main()
185                     bh::front(plus_expr.elements);  in test_main()
193                     bh::front(plus_expr.elements);  in test_main()
200                     bh::front(plus_expr.elements);  in test_main()