What is xtree - Visual C ++?

Question

I am learning the various data structures and patterns available in C ++. While we include the header for vectors, I came across a header called xtree. I can not find the documentation for this header file from Microsoft (using VS10). My question is what exactly is this header used and what does it contain? Is it even a data structure? Is this an obsolete header? An example will be helpful.

Answer 1

AFAIK, it contains auxiliary elements used for implementation std::setand std::mapwhich have (this is the only reasonable way to achieve the required performance characteristics of large output and provide the required functionality) of the tree structure inside. I can’t guess why he needs it <vector>- did you just look in the folder?