c++ - Emplacing a std::pair -

is there way of emplacing std::pair?

std::unordered_map<int, std::pair<std::string, std::string>> my_map; my_map.emplace(1, "foo", "bar"); // error 

of course inserting possible:

my_map[2] = std::make_pair("bar", "foo"); 

but doesn't require unnecessary copying/moving?

is there way of emplacing std::pair?

the arguments need suitable constructor of pair<int, pair<string,string>>, map's value_type:

my_map.emplace(1, std::make_pair("foo", "bar")); 

but doesn't require unnecessary copying/moving?

no; make_pair makes pair of pointers string literals, used initialise (in case of emplace) or assigned (in case of []) strings contained in map.