Patrick Walton
dc1184ebe2
This change redoes the way Core Foundation works to make the API smaller, safer, and easier to use. In particular: * Deriving custom types is now based on `struct`s, not on making a type alias of `CFWrapper`. * The attempts at type safety for `CFArray` and `CFDictionary` were removed as not pulling their weight (IMHO). * Methods that are really unsafe (in particular `wrap_owned` and `wrap_shared`) are now marked `unsafe`. * `wrap_owned` has been renamed to `wrap_under_create_rule` and `wrap_shared` has been renamed to `wrap_under_get_rule`, to match Apple's documentation. * `borrow_ref` and friends have been simplified into `as_concrete_TypeRef()` and `as_TypeRef()`. * Dictionaries, arrays, and sets now assume that their elements are Core Foundation objects. The old code tried not to assume that, but ended up assuming that anyway in a couple of places. * `CFString`s can be converted from Rust types with the `FromStr` trait. `CFNumber`s can be converted to and from Rust types with `ToPrimitive` and `FromPrimitive`, eliminating the duplication of functionality inside this module.