Some articles on Latent typing - interesting read

Basically you can do latent typing in C++, Python, D, Ruby, etc. but not C# or Java.
It's interesting to note how C++ is one of the few compiled language that allows latent typing.

http://www.interact-sw.co.uk/iangblog/2005/01/06/notlatent
http://mindview.net/WebLog/log-0051