internal: suppress non_snake_case lint in [pin_]init!

Changes how `[pin_]init!` handles `InitializerKind::Value` to avoid
creating a local variable that can cause `non_snake_case` lint.

Allows `non_snake_case` lint on local variables generated elsewhere
in `[pin_]init!`.

Since the same warning will be reported by the compiler on the struct
definition, having the extra warning for the generated local variables
is unnecessary and confusing.

Reported-by: Gary Guo <gary@garyguo.net>
Link: #125
Closes: https://lore.kernel.org/rust-for-linux/DGTBJBIVFZ2K.2F1ZEFGY0G7NK@garyguo.net/
Fixes: db96c51 ("add references to previously initialized fields")
Signed-off-by: Mirko Adzic <adzicmirko97@gmail.com>

Author: Mirko-A

CHANGELOG.md

@@ -41,6 +41,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   check by `#[pin_data]`.
 - `#[pin_data]` no longer produces additional `non_snake_case` warnings if field names
   are not of snake case. Standard field definition warnings are unaffected.
+- `init!` and `pin_init!` no longer produce `non_snake_case` warnings if field names
+  are not of snake case. Warnings on the struct definition are unaffected.
 
 ## [0.0.10] - 2025-08-19
 

internal/src/init.rs

@@ -296,7 +296,9 @@ fn init_fields(
             #init
 
             #(#cfgs)*
-            #[allow(unused_variables)]
+            // Allow `non_snake_case` since the same warning is going to be reported for the struct
+            // field.
+            #[allow(unused_variables, non_snake_case)]
             let #ident = #guard.let_binding();
         });