Start writing the parser for headings.

src/parser/parser_context.rs

@@ -7,7 +7,6 @@ use super::error::MyError;
 use super::error::Res;
 use super::list::List;
 use super::list::Node;
-use super::token::Token;
 use super::Context;
 
 type Matcher = dyn for<'r, 's> Fn(Context<'r, 's>, &'s str) -> Res<&'s str, &'s str>;
@@ -90,13 +89,25 @@ impl<'r, 's> ContextTree<'r, 's> {
         // TODO: Make this a specific error instead of just a generic MyError
         return Err(nom::Err::Error(CustomError::MyError(MyError("NoExit"))));
     }
+
+    pub fn get_document_root(&self) -> Option<&'s str> {
+        for current_node in self.iter() {
+            let context_element = current_node.get_data();
+            match context_element {
+                ContextElement::DocumentRoot(body) => {
+                    return Some(body);
+                }
+                _ => {}
+            }
+        }
+        None
+    }
 }
 
 #[derive(Debug)]
 pub enum ContextElement<'r, 's> {
     DocumentRoot(&'s str),
     ExitMatcherNode(ExitMatcherNode<'r>),
-    PreviousElementNode(PreviousElementNode<'s>),
     Context(&'r str),
     ListItem(usize),
     StartOfParagraph,
@@ -107,11 +118,6 @@ pub struct ExitMatcherNode<'r> {
     pub exit_matcher: ChainBehavior<'r>,
 }
 
-#[derive(Debug)]
-pub struct PreviousElementNode<'r> {
-    pub element: Token<'r>,
-}
-
 #[derive(Clone)]
 pub enum ChainBehavior<'r> {
     AndParent(Option<&'r Matcher>),