devela 0.28.0

A development substrate of coherence.
Documentation 
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# use devela::macro_derive;
macro_rules! derive_name {
    (
        $(#[$meta:meta])*
        $vis:vis struct $Name:ident;
    ) => {
        impl $Name {
            pub const NAME: &'static str = stringify!($Name);
        }
    };
}

#[macro_derive(Debug, Clone, derive_name!)]
struct Thing1;

let thing = Thing1;
let clone = thing.clone();

assert_eq!(Thing1::NAME, "Thing1");
assert_eq!(format!("{clone:?}"), "Thing1");

macro_rules! derive_value {
    (
        #[macro_derive_args($value:expr)]
        $(#[$meta:meta])*
        $vis:vis struct $Name:ident;
    ) => {
        impl $Name {
            pub const VALUE: usize = $value;
        }
    };
}

#[macro_derive(Debug, derive_value!)]
#[macro_derive_args(42)]
struct Thing2;

assert_eq!(Thing2::VALUE, 42);
assert_eq!(format!("{Thing2:?}"), "Thing2");

macro_rules! derive_label {
    (
        ($label:literal)
        $(#[$meta:meta])*
        $vis:vis struct $Name:ident;
    ) => {
        impl $Name {
            pub const LABEL: &'static str = $label;
        }
    };
}

#[macro_derive(Debug, derive_label!("direct"))]
struct Thing3;

assert_eq!(Thing3::LABEL, "direct");
assert_eq!(format!("{Thing3:?}"), "Thing3");