Add support for syn 2.0.40's new Expr::Group to dsl::auto_type

This expression may get yielded when parsing `$a: expr` from other macros.

Author: Ten0

dsl_auto_type/src/auto_type/expression_type_inference.rs

@@ -82,6 +82,9 @@ impl TypeInferrer<'_> {
             expr,
             type_hint.filter(|h| !matches!(h, syn::Type::Infer(_))),
         ) {
+            (syn::Expr::Group(syn::ExprGroup { expr, .. }), type_hint) => {
+                return self.try_infer_expression_type(expr, type_hint)
+            }
             (
                 syn::Expr::Tuple(syn::ExprTuple {
                     elems: expr_elems, ..
@@ -236,10 +239,10 @@ impl TypeInferrer<'_> {
                     ))
                 }
             },
-            (_, None) => {
+            (e, None) => {
                 return Err(syn::Error::new(
                     expr.span(),
-                    "unsupported expression for auto_type",
+                    format_args!("unsupported expression for auto_type: {e:?}"),
                 ))
             }
             (_, Some(type_hint)) => type_hint.clone(),