From 2a595e2b6c41a579082f8e836d856a3a290de6e7 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Sat, 10 Dec 2022 22:04:39 -0500
Subject: [PATCH] Implement ptr_eq on the context types.

---
 src/parser/list.rs                | 8 ++++++++
 src/parser/nom_context.rs         | 4 ++++
 src/parser/text_element_parser.rs | 5 +++++
 3 files changed, 17 insertions(+)

diff --git a/src/parser/list.rs b/src/parser/list.rs
index b2df6de6..bd891b1e 100644
--- a/src/parser/list.rs
+++ b/src/parser/list.rs
@@ -64,4 +64,12 @@ impl<T: Debug> List<T> {
     pub fn is_empty(&self) -> bool {
         self.head.is_none()
     }
+
+    pub fn ptr_eq(&self, other: &List<T>) -> bool {
+        match (self.head.as_ref(), other.head.as_ref()) {
+            (None, None) => true,
+            (None, Some(_)) | (Some(_), None) => false,
+            (Some(me), Some(them)) => Rc::ptr_eq(me, them),
+        }
+    }
 }
diff --git a/src/parser/nom_context.rs b/src/parser/nom_context.rs
index 3d72600a..64e3422e 100644
--- a/src/parser/nom_context.rs
+++ b/src/parser/nom_context.rs
@@ -18,6 +18,10 @@ impl<'r> ContextTree<'r> {
         ContextTree { tree: List::new() }
     }
 
+    pub fn ptr_eq<'x>(&self, other: &ContextTree<'x>) -> bool {
+        self.tree.ptr_eq(&other.tree)
+    }
+
     pub fn with_additional_node(&self, data: ContextElement<'r>) -> ContextTree<'r> {
         let new_list = self.tree.push_front(data);
         ContextTree { tree: new_list }
diff --git a/src/parser/text_element_parser.rs b/src/parser/text_element_parser.rs
index c6215337..f30ead29 100644
--- a/src/parser/text_element_parser.rs
+++ b/src/parser/text_element_parser.rs
@@ -62,6 +62,11 @@ where
             match till_matcher(&current_context, i.clone()) {
                 Ok((remaining, finish)) => {
                     let mut ret = Vec::new();
+                    while !current_context.ptr_eq(context) {
+                        // todo
+                        todo!()
+                    }
+                    // while current_context.tr
                     // TODO build a vec of the elements by popping off the newest elements of the context
                     return Ok((remaining, (ret, finish)));
                 }