The implementation of a dual card?

Question

I am looking for a standard structure with two maps - is there one implemented in std / boost / another standard C ++ library?

When I say “double map”, I mean a map that can be effectively indexed with both a key and a “value” (in fact, it has two types of keys, not one type of key and one type of value).

eg:

dualmap<int,string> m;
m[1] = "foo";
m["bar"] = 2
int a = m["bar"]; // a = 2

Thanks Dan

Answer 1

There, increase the bimap if you do not want all horsepower to increase the multi-index.

Answer 2

- , - . http://www.boost.org/doc/libs/1_42_0/libs/multi_index/doc/index.html