Bridging is a technology on the Cocoa platform that allows you to cast low-level Core Foundation entities such as
CFArrayRef to higher-level Foundation objects such as
NSArray. Bridging works toll-free, that is without runtime overhead.
The Elements compiler provides the
bridge<T> System Function express bridging functionality, available in all four languages.
Read more about Bridging at these external links:
- Cocoa/CoreFoundation Bridging Explained by marc hoffman on RemObjects Blogs