Did `#pragma once` make it into C++0x?

Question

The title says it all. Have #pragma once been standardized for C++0x? I don\'t know any compiler that doesn\'t provide an implementation of it, with almost alwa

Answer 1

It's also trivial to implement using #ifdef. What's the guiding principal for the new version? Implement everything you might ever want and the kitchen sink or just give you the minimum tools to do so yourself?