50   m.emplace("a", t);  in TEST()
54   m.emplace(std::string("a"), t);  in TEST()
59   m.emplace(a, t);  in TEST()
64   m.emplace(a, t);  in TEST()
68   m.emplace(std::make_pair("a", t));  in TEST()
72   m.emplace(std::make_pair(std::string("a"), t));  in TEST()
79   m.emplace(p);  in TEST()
86   m.emplace(cp);  in TEST()
93   m.emplace(pc);  in TEST()
100   m.emplace(cpc);  in TEST()
104   m.emplace(std::piecewise_construct, std::forward_as_tuple("a"),  in TEST()
109   m.emplace(std::piecewise_construct, std::forward_as_tuple(std::string("a")),  in TEST()
121   const Tree& child = root.children.emplace().first->second;  in TEST()
163   set1.emplace(std::piecewise_construct, std::make_tuple(7),  in TEST()
165   set1.emplace(std::piecewise_construct, std::make_tuple(17),  in TEST()
168   set2.emplace(std::piecewise_construct, std::make_tuple(7),  in TEST()
170   set2.emplace(std::piecewise_construct, std::make_tuple(19),  in TEST()