From c6f75e1736ee0a8703c0f02686defc152e337769 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Thu, 15 Dec 2022 21:30:53 -0500
Subject: [PATCH] Don't increment Rc counters when checking exit matchers.

---
 src/parser/nom_context.rs | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/src/parser/nom_context.rs b/src/parser/nom_context.rs
index e0ad437..9822079 100644
--- a/src/parser/nom_context.rs
+++ b/src/parser/nom_context.rs
@@ -47,12 +47,8 @@ impl<'r, 's> ContextTree<'r, 's> {
         &'r self,
         i: &'s str,
     ) -> IResult<&'s str, &'s str, VerboseError<&'s str>> {
-        // TODO: Can I do this without incrementing reference counters? Perhaps via implementing an iterator over the list?
-        let mut current_node = self.tree.clone();
-        while !current_node.is_empty() {
-            let context_element = current_node
-                .get_data()
-                .expect("While looop proves its Some()");
+        for current_node in self.iter() {
+            let context_element = current_node.get_data();
             match context_element {
                 ContextElement::ExitMatcherNode(exit_matcher) => {
                     match exit_matcher.exit_matcher {
@@ -80,10 +76,7 @@ impl<'r, 's> ContextTree<'r, 's> {
                 ContextElement::PreviousElementNode(_) => {}
                 ContextElement::StartOfParagraph => {}
             };
-
-            current_node = current_node.without_front();
         }
-
         // TODO: Make this a custom error
         not(take(0usize))(i)?;
         unreachable!()