objc 0.0.8

Objective-C Runtime bindings and wrapper for Rust.
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/**
Registers a selector, returning an `Sel`.

# Example
```
# #[macro_use] extern crate objc;
# fn main() {
let sel = sel!(description);
let sel = sel!(setObject:forKey:);
# }
```
*/
#[macro_export]
macro_rules! sel {
    // Declare a function to hide unsafety, otherwise we can trigger the
    // unused_unsafe lint; see rust-lang/rust#8472
    ($name:ident) => ({
        #[inline(always)]
        fn register_sel(name_with_nul: &str) -> $crate::runtime::Sel {
            let ptr = name_with_nul.as_ptr() as *const _;
            unsafe { $crate::runtime::sel_registerName(ptr) }
        }
        register_sel(concat!(stringify!($name), '\0'))
    });
    ($($name:ident :)+) => ({
        #[inline(always)]
        fn register_sel(name_with_nul: &str) -> $crate::runtime::Sel {
            let ptr = name_with_nul.as_ptr() as *const _;
            unsafe { $crate::runtime::sel_registerName(ptr) }
        }
        register_sel(concat!($(stringify!($name), ':'),+, '\0'))
    });
}

/**
Sends a message to an object. The first argument should implement the
`ToMessage` trait, and the syntax is similar to the message syntax in
Objective-C. Variadic arguments are not currently supported.

# Example
``` no_run
# #[macro_use] extern crate objc;
# use objc::runtime::Object;
# fn main() {
# unsafe {
let obj: *mut Object;
# let obj: *mut Object = 0 as *mut Object;
let description: *const Object = msg_send![obj, description];
let _: () = msg_send![obj, setArg1:1 arg2:2];
# }
# }
```
*/
#[macro_export]
macro_rules! msg_send {
    (super($obj:expr, $superclass:expr), $name:ident) => ({
        #[inline(always)]
        unsafe fn to_mut<T>(ptr: &T) -> *mut T { ptr as *const T as *mut T }
        let sel = sel!($name);
        $crate::MessageArguments::send_super((), to_mut(&*$obj), $superclass, sel)
    });
    (super($obj:expr, $superclass:expr), $($name:ident : $arg:expr)+) => ({
        #[inline(always)]
        unsafe fn to_mut<T>(ptr: &T) -> *mut T { ptr as *const T as *mut T }
        let sel = sel!($($name:)+);
        $crate::MessageArguments::send_super(($($arg,)*), to_mut(&*$obj), $superclass, sel)
    });
    ($obj:expr, $name:ident) => ({
        #[inline(always)]
        unsafe fn to_mut<T>(ptr: &T) -> *mut T { ptr as *const T as *mut T }
        let sel = sel!($name);
        $crate::MessageArguments::send((), to_mut(&*$obj), sel)
    });
    ($obj:expr, $($name:ident : $arg:expr)+) => ({
        #[inline(always)]
        unsafe fn to_mut<T>(ptr: &T) -> *mut T { ptr as *const T as *mut T }
        let sel = sel!($($name:)+);
        $crate::MessageArguments::send(($($arg,)*), to_mut(&*$obj), sel)
    });
}