email_macros/
lib.rs

1use proc_macro::TokenStream;
2use quote::quote;
3use syn::{parse_macro_input, DeriveInput};
4
5#[proc_macro_derive(BackendContext)]
6pub fn derive_backend_context(input: TokenStream) -> TokenStream {
7    let input: DeriveInput = parse_macro_input!(input);
8    let ident = &input.ident;
9
10    let output = quote! {
11        impl email::backend::context::BackendContext for #ident {}
12    };
13
14    TokenStream::from(output)
15}
16
17// TODO
18// #[proc_macro_derive(EmailBackendContext, attributes(context))]
19// pub fn derive_email_backend_context(input: TokenStream) -> TokenStream {
20//     use proc_macro::TokenStream;
21//     use quote::quote;
22//     use syn::{parse_macro_input, Attribute, Data, DataStruct, DeriveInput, Fields, Meta, PathSegment};
23
24//     let input: DeriveInput = parse_macro_input!(input);
25
26//     let mut output = quote!();
27
28//     match input.data {
29//         Data::Struct(DataStruct {
30//             fields: Fields::Named(ref fields),
31//             ..
32//         }) => {
33//             for field in &fields.named {
34//                 if let Some(_ident) = &field.ident {
35//                     for attr in &field.attrs {
36//                         if let Attribute {
37//                             meta: Meta::Path(path),
38//                             ..
39//                         } = attr
40//                         {
41//                             for segment in &path.segments {
42//                                 match segment {
43//                                     PathSegment { ident, .. } if ident.to_string() == "context" => {
44//                                         output = quote! {
45//                                         #output
46
47//                                         impl BackendContextMapper<ImapContextSync> for MyStaticContext {
48//                                             fn map_context(&self) -> Option<&ImapContextSync> {
49//                                                 Some(&self.imap)
50//                                             }
51//                                         }
52
53//                                                                             }
54//                                     }
55//                                     _ => (),
56//                                 }
57//                             }
58//                         };
59//                     }
60//                 }
61//             }
62//         }
63//         _ => (),
64//     };
65
66//     TokenStream::from(output)
67// }
email_macros/lib.rs

email_macros/
lib.rs
