c++ map with same key type and different item type [duplicate]

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Possible Duplicate:

how do you make a heterogeneous boost:开发者_StackOverflow中文版:map?

It's possible have a map in C + + with the same type for the key and different types of items? For example:

 _______________________
 |    key    |   value   |
 |===========|===========|
 | string    |   int     |
 |-----------|-----------|
 | string    |   char    |
 |-----------|-----------|
 | string    |  vector   |
 |-----------|-----------|
 | string    |   ....    |

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Yes you can, store a variadic type, such as boost::any or (my personal preference, boost::variant)

So your value type can be defined as:

typedef boost::variant<int, char, ...> value_type;

Store than in the map, and then once you've extracted values, use the visitor concept to process.

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I'm not sure quite why you would want to do this, but you could use a map<std::string, boost::any> I believe.

What are you really trying to do?