Implement a compare_property_numeric.

src/compare/compare_field.rs

@@ -1,4 +1,5 @@
 use std::fmt::Debug;
+use std::str::FromStr;
 
 use super::diff::artificial_diff_scope;
 use super::diff::compare_ast_node;
@@ -7,6 +8,7 @@ use super::diff::DiffStatus;
 use super::sexp::unquote;
 use super::sexp::Token;
 use super::util::get_property;
+use super::util::get_property_numeric;
 use super::util::get_property_quoted_string;
 use super::util::get_property_unquoted_atom;
 use crate::types::AstNode;
@@ -117,6 +119,38 @@ pub(crate) fn compare_property_unquoted_atom<'b, 's, 'x, R, RG: Fn(R) -> Option<
     }
 }
 
+pub(crate) fn compare_property_numeric<
+    'b,
+    's,
+    'x,
+    R,
+    RV: FromStr + PartialEq + Debug,
+    RG: Fn(R) -> Option<RV>,
+>(
+    _source: &'s str,
+    emacs: &'b Token<'s>,
+    rust_node: R,
+    emacs_field: &'x str,
+    rust_value_getter: RG,
+) -> Result<ComparePropertiesResult<'b, 's>, Box<dyn std::error::Error + 's>>
+where
+    <RV as FromStr>::Err: std::error::Error,
+    <RV as FromStr>::Err: 's,
+{
+    let value = get_property_numeric::<RV>(emacs, emacs_field)?;
+    let rust_value = rust_value_getter(rust_node);
+    if rust_value != value {
+        let this_status = DiffStatus::Bad;
+        let message = Some(format!(
+            "{} mismatch (emacs != rust) {:?} != {:?}",
+            emacs_field, value, rust_value
+        ));
+        Ok(ComparePropertiesResult::SelfChange(this_status, message))
+    } else {
+        Ok(ComparePropertiesResult::NoChange)
+    }
+}
+
 pub(crate) fn compare_property_list_of_quoted_string<
     'b,
     's,