C++0x auto

Consider the following iterator example:

map<string, pair<int, float>> data;

for (map<string, pair<int, float>>::iterator i = data.begin(); i != data.end(); i++)
{
   // ...
}

We can clean this up a bit by using the auto keyword:

map<string, pair<int, float>> data;

for (auto i = data.begin(); i != data.end(); i++)
{
   // ...
}