[PATCH v2 1/5] rust: macros: allow conversion from `&T` to `TokenStream`

[Jesung Yang]

Implement the `ToTokens` trait for `&T` where `T` implements `ToTokens`.
This allows users to use the `quote!()` macro with references directly,
avoiding the need to clone values.

Tested-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Signed-off-by: Jesung Yang <y.j3ms.n@xxxxxxxxx>
---
 rust/macros/quote.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/rust/macros/quote.rs b/rust/macros/quote.rs
index 92cacc4067c9..8a89f0b1e785 100644
--- a/rust/macros/quote.rs
+++ b/rust/macros/quote.rs
@@ -7,6 +7,12 @@ pub(crate) trait ToTokens {
     fn to_tokens(&self, tokens: &mut TokenStream);
 }
 
+impl<T: ToTokens> ToTokens for &T {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        (*self).to_tokens(tokens);
+    }
+}
+
 impl<T: ToTokens> ToTokens for Option<T> {
     fn to_tokens(&self, tokens: &mut TokenStream) {
         if let Some(v) = self {
-- 
2.39.5