[−][src]Crate objc_encode
Objective-C type encoding creation and parsing in Rust.
The Objective-C compiler encodes types as strings for usage in the runtime. This crate aims to provide a strongly-typed (rather than stringly-typed) way to create and describe these type encodings without memory allocation in Rust.
Implementing Encode
This crate declares an Encode
trait that can be implemented for types that
the Objective-C compiler can encode. Implementing this trait looks like:
unsafe impl Encode for CGPoint { const ENCODING: Encoding<'static> = Encoding::Struct("CGPoint", &[CGFloat::ENCODING, CGFLOAT::ENCODING]); }
For an example of how this works with more complex types, like structs
containing structs, see the core_graphics
example.
Comparing with encoding strings
An Encoding
can be compared with an encoding string from the Objective-C
runtime:
assert!(&i32::ENCODING == "i");
Generating encoding strings
Every Encoding
implements Display
as its string representation.
This can be generated conveniently through the to_string
method:
assert_eq!(i32::ENCODING.to_string(), "i");
Enums
Encoding | An Objective-C type encoding. |
Traits
Encode | Types that have an Objective-C type encoding. |