ieee802154/
utils.rs

1/// A trait for converting a value from one type to another.
2/// Any failure in converting will return None.
3pub trait OptionalFrom<T: Sized>
4where
5    Self: Sized,
6{
7    fn optional_from(value: T) -> Option<Self>;
8}
9
10/// Creates an enum with various traits.
11/// The first key-value pair is the default used if any conversion would fail.
12#[macro_export]
13macro_rules! extended_enum {
14    ($(#[$outer:meta])* $name:ident, $ty:ty, $($(#[$inner:meta])* $var:ident => $val:expr),+ $(,)*) => (
15
16        $(#[$outer])*
17        #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
18        #[cfg_attr(feature = "defmt", derive(defmt::Format))]
19        pub enum $name {
20            $(
21                $(#[$inner])*
22                $var,
23            )*
24        }
25
26        impl From<$ty> for $name {
27            fn from(v: $ty) -> Self {
28                match v {
29                    $( $val => $name::$var,)*
30                    _ => panic!("Invalid value"),
31                }
32            }
33        }
34
35        impl From<$name> for $ty {
36            fn from(v: $name) -> Self {
37                match v {
38                    $( $name::$var => $val, )*
39                }
40            }
41        }
42
43        impl OptionalFrom<$ty> for $name {
44            fn optional_from(v: $ty) -> Option<Self> {
45                match v {
46                    $( $val => Some($name::$var),)*
47                    _ => None,
48                }
49            }
50        }
51
52        impl PartialEq<$name> for $ty {
53            fn eq(&self, other: &$name) -> bool {
54                match *other {
55                    $( $name::$var => *self == $val, )*
56                }
57            }
58
59            fn ne(&self, other: &$name) -> bool {
60                match *other {
61                    $( $name::$var => *self != $val, )*
62                }
63            }
64        }
65    );
66}
ieee802154/utils.rs

ieee802154/
utils.rs
