tuix_core 0.2.0

Core parts of tuix
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63

use std::any::{Any, TypeId};
pub trait Node: Any {

}

impl dyn Node {
    // Check if a message is a certain type
    pub fn is<T: Any + 'static>(&self) -> bool {
        // Get TypeId of the type this function is instantiated with
        let t = TypeId::of::<T>();

        // Get TypeId of the type in the trait object
        let concrete = self.type_id();

        // Compare both TypeIds on equality
        t == concrete
    }

    // Casts a message to the specified type if the message is of that type
    pub fn downcast<T>(&mut self) -> Option<&mut T>
    where
        T: Node + 'static,
    {
        if self.is::<T>() {
            unsafe { Some(&mut *(self as *mut dyn Node as *mut T)) }
        } else {
            None
        }
    }

    pub fn downcast_ref<T>(&self) -> Option<&T>
    where
        T: Any + 'static,
    {
        if self.is::<T>() {
            unsafe { Some(&*(self as *const dyn Node as *const T)) }
        } else {
            None
        }
    }
}

trait Downcast {
    fn as_any (self: &'_ Self)
      -> &'_ dyn Any
    where
        Self : 'static,
    ;
}

impl<T: Node> Downcast for T {
    fn as_any (self: &'_ Self)
      -> &'_ dyn Any
    where
        Self : 'static,
    {
        self
    }
}

impl<T: 'static> Node for T {

}