initial test args struct

2 files changed, 13 insertions, 2 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 98294e6..ff29be6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,5 +9,6 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
+darling = "0.20.1"
 quote = "1.0"
 syn = { version = "2.0.16", features = ["full", "extra-traits"] }
diff --git a/src/lib.rs b/src/lib.rs
index 3a9c2ba..c3193ce 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,15 @@
+use darling::FromAttributes;
 use proc_macro::TokenStream;
 use quote::quote;
 use syn::{parse, ItemStruct};
 
+#[derive(Debug, Default, FromAttributes)]
+#[darling(attributes(ppproperly))]
+#[darling(default)]
+struct Args {
+    len_for: Option<String>,
+}
+
 #[proc_macro_derive(Serialize)]
 pub fn derive_serialize(item: TokenStream) -> TokenStream {
     let ast: ItemStruct = parse(item).unwrap();
@@ -27,7 +35,7 @@ pub fn derive_serialize(item: TokenStream) -> TokenStream {
     .into()
 }
 
-#[proc_macro_derive(Deserialize, attributes(len_for))]
+#[proc_macro_derive(Deserialize, attributes(ppproperly))]
 pub fn derive_deserialize(item: TokenStream) -> TokenStream {
     let ast: ItemStruct = parse(item).unwrap();
     let name = ast.ident;
@@ -35,7 +43,9 @@ pub fn derive_deserialize(item: TokenStream) -> TokenStream {
     let deserializers = ast.fields.iter().map(|field| {
         let field_name = field.ident.as_ref().expect("should be a names struct");
 
-        println!("{:?}", field.attrs);
+        let args = Args::from_attributes(&field.attrs).unwrap();
+        println!("{:?}", args);
+
         quote!(
             self.#field_name.deserialize(r)?;
         )