Avoid closures for the intermediate macro.

src/intermediate/registry.rs

@@ -1,4 +1,5 @@
 use std::collections::HashMap;
+use std::marker::PhantomData;
 
 use super::ast_node::IntoIAstNode;
 use crate::error::CustomError;
@@ -12,10 +13,8 @@ type IdCounter = u16;
 pub(crate) struct Registry<'orig, 'parse> {
     id_counter: IdCounter,
     targets: HashMap<&'parse str, String>,
-    footnote_ids: Vec<(
-        Option<&'parse str>,
-        FootnoteDefinitionContents<'orig, 'parse>,
-    )>,
+    footnote_ids: Vec<(Option<&'parse str>, Vec<IAstNode>)>,
+    _phantom: PhantomData<&'orig ()>,
 }
 
 impl<'orig, 'parse> Registry<'orig, 'parse> {
@@ -24,6 +23,7 @@ impl<'orig, 'parse> Registry<'orig, 'parse> {
             id_counter: 0,
             targets: HashMap::new(),
             footnote_ids: Vec::new(),
+            _phantom: PhantomData,
         }
     }
 
@@ -35,12 +35,10 @@ impl<'orig, 'parse> Registry<'orig, 'parse> {
     }
 
     pub(crate) fn get_footnote_ids(&self) -> impl Iterator<Item = (usize, &Vec<IAstNode>)> {
-        // TODO
-        std::iter::empty()
-        // self.footnote_ids
-        //     .iter()
-        //     .map(|(_label, definition)| definition)
-        //     .enumerate()
+        self.footnote_ids
+            .iter()
+            .map(|(_label, definition)| definition)
+            .enumerate()
     }
 
     /// Get a 0-indexed ID for a footnote.
@@ -126,8 +124,3 @@ async fn convert_definition_contents<'reg, 'orig, 'parse>(
 
     Ok(contents)
 }
-
-enum FootnoteDefinitionContents<'orig, 'parse> {
-    FromReference(&'orig Vec<Object<'parse>>),
-    FromDefinition(&'orig Vec<Object<'parse>>),
-}