On Dec 12, 2010, at 4:34 PM, Matt Neuburg wrote: > I feel like I'm missing something. I can't seem to typecast as CFRange to an > NSRange.
Both are distinct C structs. In C, *explicitly* typecasting one pointer to the other would be allowed but semantically incorrect. In C++ casting a pointer to the other would be illegal. > I know I can pull a CFRange apart and reassemble it as an NSRange, but > shouldn't there be a simpler way? m. In fact, initializing a NSRange value from a CFRange value by means of a library function would not be as easy as it might look at the first glance. The reason is, CFRange has field members whose type is a *signed* long, and NSRange field types are *unsigned* ints or *unsigned* longs (the size depending on architecture). Mixing signed and unsigned types - possibly with different bit-sizes - in a simple assignment operation would require overflow checks and may require to throw exceptions. So, what should a library function do? If required, you can include these checks in your code, though. Regards Andreas _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
