alrulab_macros/
lib.rs

1#![allow(unused)]
2
3extern crate proc_macro;
4
5use proc_macro::TokenStream;
6use quote::quote;
7use syn::{parse_macro_input, DeriveInput};
8
9#[proc_macro_derive(CloneValued)]
10pub fn derive_clone_valued(input: TokenStream) -> TokenStream {
11    let ast = parse_macro_input!(input as DeriveInput);
12    impl_clone_valued(&ast)
13}
14
15fn impl_clone_valued(ast: &DeriveInput) -> TokenStream {
16    let name = &ast.ident;
17    let gen = quote! {
18        impl alrulab_core::value::CloneValued for #name {
19            fn clone_to_valued(&self) -> alrulab_core::value::Value<Self>
20            where
21                Self: Sized
22            {
23                alrulab_core::value::Value::nok(self.clone())
24            }
25            fn clone_from_valued(&mut self, value: alrulab_core::value::Value<Self>)
26            where
27                Self: Sized
28            {
29                self.clone_from(value.unwrap_or_default());
30            }
31        }
32    };
33    gen.into()
34}
alrulab_macros/lib.rs

alrulab_macros/
lib.rs
