@2024-03-03 15:36+9:00

ohkami/src/lib.rs

@@ -64,6 +64,7 @@ mod __rt__ {
 
 mod request;
 pub use request::{Request, Method, FromRequestError, FromRequest, FromParam, Memory};
+pub use ::ohkami_macros::FromRequest;
 
 mod response;
 pub use response::{Response, Status, IntoResponse};

ohkami_macros/src/from_request.rs

@@ -1,6 +1,19 @@
-use proc_macro2::TokenStream;
-use syn::{Error, Result};
+use proc_macro2::{Span, TokenStream};
+use syn::{Error, ItemStruct, Result};
 
 pub(super) fn derive_from_request(target: TokenStream) -> Result<TokenStream> {
-
+    let s: ItemStruct = syn::parse2(target)?;
+
+    if s.generics.lifetimes().count() >= 2 {
+        return Err(Error::new(Span::call_site(), "`#[derive(FromRequest)]` doesn't support multiple lifetimes!"))
+    }
+
+    if s.semi_token.is_none() {/* struct S { 〜 } */
+
+
+    } else {/* struct T(); */
+
+    }
+
+    todo!()
 }

ohkami_macros/src/lib.rs

@@ -256,6 +256,28 @@ pub fn ResponseBody(format: proc_macro::TokenStream, data: proc_macro::TokenStre
 }
 
 
+/// # `#[derive(FromRequest)]`
+/// 
+/// Automatically impl `FromRequest` for a struct composed of
+/// `FromRequest` types
+/// 
+/// <br>
+/// 
+/// *example.rs*
+/// ```ignore
+/// use ohkami::FromRequest;
+/// use sqlx::PgPool;
+/// 
+/// #[derive(FromRequest)]
+/// struct MyItems1<'req> {
+///     db: ohkami::Memory<'req, PgPool>,
+/// }
+/// 
+/// #[derive(FromRequest)]
+/// struct MyItems2(
+///     MyItems<'req>,
+/// );
+/// ```
 #[proc_macro_derive(FromRequest)]
 pub fn derive_from_request(target: proc_macro::TokenStream) -> proc_macro::TokenStream {
     from_request::derive_from_request(target.into())