Implement a parser for a bullet in a list item.

src/parser/token.rs

@@ -106,3 +106,25 @@ impl<'a> Source<'a> for PlainList<'a> {
         self.source
     }
 }
+
+#[derive(Debug)]
+pub struct ListItem<'a> {
+    pub source: &'a str,
+}
+
+impl<'a> Source<'a> for ListItem<'a> {
+    fn get_source(&'a self) -> &'a str {
+        self.source
+    }
+}
+
+#[derive(Debug)]
+pub struct ListCounter<'a> {
+    pub source: &'a str,
+}
+
+impl<'a> Source<'a> for ListCounter<'a> {
+    fn get_source(&'a self) -> &'a str {
+        self.source
+    }
+}