ix(macros)!: require explicit `.into()` on chain function return values

1 files changed, 2 insertions, 1 deletions

diff --git a/mingling_macros/src/lib.rs b/mingling_macros/src/lib.rs
index d0f603a..e9fc327 100644
--- a/mingling_macros/src/lib.rs
+++ b/mingling_macros/src/lib.rs
@@ -867,7 +867,8 @@ pub fn dispatcher(input: TokenStream) -> TokenStream {
 ///
 /// - The function must have at least **one** parameter (the previous type in the chain).
 /// - The first parameter must be taken **by move**.
-/// - The function must return `Next` (the type alias generated by `gen_program!`, which equals `ChainProcess<ProgramName>`).
+/// - The function may return `Next`, `ChainProcess<ProgramName>`, `()`, or omit the return type.
+/// - The original function signature is preserved unchanged.
 /// - With the `async` feature, async functions are supported; without it, async functions are rejected.
 #[proc_macro_attribute]
 pub fn chain(attr: TokenStream, item: TokenStream) -> TokenStream {