Wrap the parameter sets in parenthesis.

src/compare/compare_field.rs

@@ -15,14 +15,23 @@ pub(crate) enum EmacsField<'s> {
 ///
 /// This is for when you want to acknowledge that a field exists in the emacs token, but you do not have any validation for it when using the compare_properties!() macro. Ideally, this should be kept to a minimum since this represents untested values.
 #[allow(dead_code)]
-pub(crate) fn compare_noop<'b, 's, 'x>(
+pub(crate) fn impl_compare_noop<'b, 's, 'x, R, RG>(
     _emacs: &'b Token<'s>,
+    _rust_node: R,
     _emacs_field: &'x str,
-    _rust_value: (),
+    _rust_value_getter: RG,
 ) -> Result<Option<(DiffStatus, Option<String>)>, Box<dyn std::error::Error>> {
     Ok(None)
 }
 
+/// Do no comparison.
+///
+/// This is for when you want to acknowledge that a field exists in the emacs token, but you do not have any validation for it when using the compare_properties!() macro. Ideally, this should be kept to a minimum since this represents untested values.
+#[allow(dead_code)]
+pub(crate) fn compare_identity() -> () {
+    ()
+}
+
 pub(crate) fn compare_property_quoted_string<'b, 's, 'x, R, RG: Fn(R) -> Option<&'s str>>(
     emacs: &'b Token<'s>,
     rust_node: R,

src/compare/diff.rs

@@ -3,8 +3,9 @@ use std::borrow::Cow;
 use std::collections::BTreeSet;
 use std::collections::HashSet;
 
+use super::compare_field::compare_identity;
 use super::compare_field::compare_property_quoted_string;
-use super::compare_field::compare_property_quoted_string_required_value;
+use super::compare_field::impl_compare_noop;
 use super::elisp_fact::ElispFact;
 use super::elisp_fact::GetElispFact;
 use super::sexp::unquote;
@@ -2661,9 +2662,21 @@ fn compare_verbatim<'b, 's>(
     if let Some((new_status, new_message)) = compare_properties!(
         emacs,
         rust,
+        (
             EmacsField::Required(":value"),
             |r| Some(r.contents),
             compare_property_quoted_string
+        ),
+        (
+            EmacsField::Required(":value"),
+            |r| Some(r.contents),
+            compare_property_quoted_string
+        ),
+        (
+            EmacsField::Required(":foo"),
+            compare_identity,
+            impl_compare_noop
+        )
     )? {
         this_status = new_status;
         message = new_message;
@@ -2691,9 +2704,11 @@ fn compare_code<'b, 's>(
     if let Some((new_status, new_message)) = compare_properties!(
         emacs,
         rust,
+        (
             EmacsField::Required(":value"),
             |r| Some(r.contents),
             compare_property_quoted_string
+        )
     )? {
         this_status = new_status;
         message = new_message;

src/compare/macros.rs

@@ -1,6 +1,18 @@
+macro_rules! compare_noop {
+    ($($field:expr),+) => {
+        $(
+        EmacsField::Required(":foo"),
+        compare_identity,
+        impl_compare_noop
+),+
+    };
+}
+
+pub(crate) use compare_noop;
+
 /// Create iterators for ast nodes where it only has to iterate over children
 macro_rules! compare_properties {
-    ($emacs:expr, $rust:expr, $($emacs_field:expr, $rust_value_getter:expr, $compare_fn: ident),+) => {
+    ($emacs:expr, $rust:expr, $(($emacs_field:expr, $rust_value_getter:expr, $compare_fn: expr)),+) => {
         {
             let mut this_status = DiffStatus::Good;
             let mut message: Option<String> = None;
@@ -36,7 +48,7 @@ macro_rules! compare_properties {
                 },
                 EmacsField::Optional(_name) => {},
             }
-            ),+
+            )+
 
             if !emacs_keys.is_empty() {
                 let unexpected_keys: Vec<&str> = emacs_keys.into_iter().collect();
@@ -66,7 +78,7 @@ macro_rules! compare_properties {
                 },
                 _ => {}
             }
-            ),+
+            )+
 
             match this_status {
                 DiffStatus::Good => {