error C2664: multimap in map

Question

Here is my code:

map<string, multimap<string, string>> mp;
string str1 = "abc";
string str2 = "def";
string str3 = "ghi";
mp.insert(str1, {str2, str3});

I got an error C2664:

'void std::_Tree<std::_Tmap_traits<_Kty,_Ty,_Pr,_Alloc,false>>::insert(std::initializer_list<std::pair<const _Kty,_Ty>>)' : cannot convert argument 1 from 'std::string' to 'std::_Tree_const_iterator<std::_Tree_val<std::_Tree_simple_types<std::pair<const _Kty,_Ty>>>>' c:\users\thomas\documents\visual studio 2013\projects\test\test\main.cpp    14  1   test

It seems that I should use make_pair so I try like this:

mp.insert(std::make_pair(str1, std::make_pair(str2, str3)));

But I still get the same error.
What should I do?

Answer 1

std::map::insert is expecting string and multimap<string, string> as its parameter.
Heremp.insert(str1, {str2, str3}); You are passing string and an initializer_list<string> as parameters.

If you want to insert then,

mp.insert(make_pair(str1, multimap<string, string>{{make_pair(str2, str3)}}));