dyn_ext_derive 0.1.0

Proc macro for dyn_ext (derives)
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

use proc_macro::TokenStream;
use quote::quote;
use syn::{parse_macro_input, DeriveInput};

#[proc_macro_derive(AsAny)]
pub fn derive_as_any(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input as DeriveInput);
    let name = input.ident;

    let expanded = quote! {
        impl dyn_ext::AsAny for #name {
            fn as_any(&self) -> &dyn std::any::Any {
                self
            }
        }
    };

    TokenStream::from(expanded)
}

#[proc_macro_derive(BoxedClone)]
pub fn derive_boxed_clone(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input as DeriveInput);
    let name = input.ident;

    let expanded = quote! {
        impl dyn_ext::BoxedClone<dyn T> for #name {
            fn boxed_clone(&self) -> Box<T> {
                Box::new(self.clone())
            }
        }
    };

    TokenStream::from(expanded)
}