From 57dd1da6216b2b1786efe525b35de2cda86f433c Mon Sep 17 00:00:00 2001
From: fa-sharp <farshadkt@gmail.com>
Date: Thu, 19 Mar 2026 22:11:28 -0400
Subject: [PATCH] Update lib.rs

---
 crates/axum-app-wrapper-macros/src/lib.rs | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/crates/axum-app-wrapper-macros/src/lib.rs b/crates/axum-app-wrapper-macros/src/lib.rs
index a553c09..a0d325f 100644
--- a/crates/axum-app-wrapper-macros/src/lib.rs
+++ b/crates/axum-app-wrapper-macros/src/lib.rs
@@ -20,12 +20,14 @@ use syn::{Data, DeriveInput, Fields, parse_macro_input};
 ///     pool: Pool,
 ///     db: Db,
 /// }
+/// // To wrap the whole state in `Arc`, implement `TryFrom<TypeMap>` for `Arc<AppState>`:
+/// impl TryFrom<TypeMap> for Arc<AppState> {
+///     type Error = anyhow::Error;
 ///
-/// // Plain state — axum will clone the whole struct on each request:
-/// App::<AppState>::new()
-///
-/// // Or wrap in Arc yourself for cheap clones:
-/// App::<Arc<AppState>>::new()
+///     fn try_from(map: TypeMap) -> Result<Self, Self::Error> {
+///         Ok(Self(Arc::new(AppState::try_from(map)?)))
+///     }
+/// }
 /// ```
 #[proc_macro_derive(AppState)]
 pub fn derive_app_state(input: TokenStream) -> TokenStream {