Create structure for subscript and superscript.

src/compare/diff.rs

@@ -1,5 +1,7 @@
 use super::util::assert_bounds;
 use super::util::assert_name;
+use crate::parser::Subscript;
+use crate::parser::Superscript;
 use crate::parser::sexp::Token;
 use crate::parser::AngleLink;
 use crate::parser::Bold;
@@ -176,6 +178,8 @@ fn compare_object<'s>(
         Object::LineBreak(obj) => compare_line_break(source, emacs, obj),
         Object::Target(obj) => compare_target(source, emacs, obj),
         Object::StatisticsCookie(obj) => compare_statistics_cookie(source, emacs, obj),
+        Object::Subscript(obj) => compare_subscript(source, emacs, obj),
+        Object::Superscript(obj) => compare_superscript(source, emacs, obj),
     }
 }
 
@@ -1513,3 +1517,49 @@ fn compare_statistics_cookie<'s>(
         children: Vec::new(),
     })
 }
+
+fn compare_subscript<'s>(
+    source: &'s str,
+    emacs: &'s Token<'s>,
+    rust: &'s Subscript<'s>,
+) -> Result<DiffResult, Box<dyn std::error::Error>> {
+    let mut this_status = DiffStatus::Good;
+    let emacs_name = "subscript";
+    if assert_name(emacs, emacs_name).is_err() {
+        this_status = DiffStatus::Bad;
+    }
+
+    if assert_bounds(source, emacs, rust).is_err() {
+        this_status = DiffStatus::Bad;
+    }
+
+    Ok(DiffResult {
+        status: this_status,
+        name: emacs_name.to_owned(),
+        message: None,
+        children: Vec::new(),
+    })
+}
+
+fn compare_superscript<'s>(
+    source: &'s str,
+    emacs: &'s Token<'s>,
+    rust: &'s Superscript<'s>,
+) -> Result<DiffResult, Box<dyn std::error::Error>> {
+    let mut this_status = DiffStatus::Good;
+    let emacs_name = "superscript";
+    if assert_name(emacs, emacs_name).is_err() {
+        this_status = DiffStatus::Bad;
+    }
+
+    if assert_bounds(source, emacs, rust).is_err() {
+        this_status = DiffStatus::Bad;
+    }
+
+    Ok(DiffResult {
+        status: this_status,
+        name: emacs_name.to_owned(),
+        message: None,
+        children: Vec::new(),
+    })
+}