Fix using references for context elements.

src/context/list.rs

@@ -31,14 +31,8 @@ impl<'parent, T> List<'parent, T> {
     pub fn iter_list(&self) -> IterList<'_, T> {
         IterList { next: Some(self) }
     }
-}
 
-pub trait ListType<'parent, T> {
-    fn push(&'parent self, item: T) -> List<'parent, T>;
-}
-
-impl<'parent, T> ListType<'parent, T> for List<'parent, T> {
-    fn push(&'parent self, item: T) -> Self {
+    pub fn push(&'parent self, item: T) -> Self {
         Self {
             data: item,
             parent: Some(self),
@@ -46,15 +40,6 @@ impl<'parent, T> ListType<'parent, T> for List<'parent, T> {
     }
 }
 
-impl<'parent, T> ListType<'parent, T> for Link<'parent, T> {
-    fn push(&'parent self, item: T) -> List<'parent, T> {
-        List {
-            data: item,
-            parent: *self,
-        }
-    }
-}
-
 pub struct Iter<'a, T> {
     next: Link<'a, T>,
 }

src/context/mod.rs

@@ -1,4 +1,3 @@
-use self::parser_context::Context;
 use crate::error::Res;
 use crate::parser::OrgSource;
 
@@ -8,14 +7,17 @@ mod list;
 mod parser_context;
 mod parser_with_context;
 
-pub type RefContext<'r, 's> = &'r Context<'r, 's>;
-trait ContextMatcher =
-    for<'r, 's> Fn(RefContext<'r, 's>, OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>>;
+pub type RefContext<'b, 'r, 's> = &'b Context<'r, 's>;
+pub trait ContextMatcher =
+    for<'b, 'r, 's> Fn(RefContext<'b, 'r, 's>, OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>>;
 type DynContextMatcher<'c> = dyn ContextMatcher + 'c;
-trait Matcher = for<'s> Fn(OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>>;
+pub trait Matcher = for<'s> Fn(OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>>;
 type DynMatcher<'c> = dyn Matcher + 'c;
 
 pub use exiting::ExitClass;
+pub use global_settings::GlobalSettings;
+pub use list::List;
+pub use parser_context::Context;
 pub use parser_context::ContextElement;
 pub use parser_context::ExitMatcherNode;
 pub(crate) use parser_with_context::parser_with_context;

src/context/parser_context.rs

@@ -3,7 +3,6 @@ use nom::combinator::eof;
 use super::exiting::ExitClass;
 use super::global_settings::GlobalSettings;
 use super::list::List;
-use super::list::ListType;
 use super::DynContextMatcher;
 use super::RefContext;
 use crate::error::Res;
@@ -134,13 +133,13 @@ impl<'r> std::fmt::Debug for ExitMatcherNode<'r> {
 #[derive(Debug)]
 pub struct Context<'r, 's> {
     global_settings: &'s GlobalSettings<'s>,
-    tree: &'r List<'r, ContextElement<'r, 's>>,
+    tree: List<'r, &'r ContextElement<'r, 's>>,
 }
 
 impl<'r, 's> Context<'r, 's> {
     pub fn new(
         global_settings: &'s GlobalSettings<'s>,
-        tree: &'r List<'r, ContextElement<'r, 's>>,
+        tree: List<'r, &'r ContextElement<'r, 's>>,
     ) -> Self {
         Self {
             global_settings,
@@ -148,36 +147,33 @@ impl<'r, 's> Context<'r, 's> {
         }
     }
 
-    pub fn with_additional_node(&self, data: ContextElement<'r, 's>) -> Self {
-        let new_tree = self.tree.push(data);
-        Self {
-            global_settings: self.global_settings,
-            tree: new_tree,
-        }
+    pub fn with_additional_node(&'r self, new_element: &'r ContextElement<'r, 's>) -> Self {
+        let new_tree = self.tree.push(new_element);
+        Self::new(self.global_settings, new_tree)
     }
 
-    pub fn iter(&self) -> super::list::Iter<'r, ContextElement<'r, 's>> {
+    pub fn iter(&'r self) -> super::list::Iter<'r, &'r ContextElement<'r, 's>> {
         self.tree.iter()
     }
 
-    pub fn iter_context(&self) -> Iter<'r, 's> {
+    pub fn iter_context(&'r self) -> Iter<'r, 's> {
         Iter {
             next: self.tree.iter_list(),
             global_settings: self.global_settings,
         }
     }
 
-    pub fn get_parent(&self) -> Option<Self> {
+    pub fn get_parent(&'r self) -> Option<Self> {
         self.tree.get_parent().map(|parent_tree| Self {
             global_settings: self.global_settings,
-            tree: parent_tree,
+            tree: parent_tree.clone(),
         })
     }
 }
 
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
-fn document_end<'r, 's>(
-    _context: RefContext<'r, 's>,
+fn document_end<'b, 'r, 's>(
+    _context: RefContext<'b, 'r, 's>,
     input: OrgSource<'s>,
 ) -> Res<OrgSource<'s>, OrgSource<'s>> {
     eof(input)
@@ -185,7 +181,7 @@ fn document_end<'r, 's>(
 
 pub struct Iter<'r, 's> {
     global_settings: &'s GlobalSettings<'s>,
-    next: super::list::IterList<'r, ContextElement<'r, 's>>,
+    next: super::list::IterList<'r, &'r ContextElement<'r, 's>>,
 }
 
 impl<'r, 's> Iterator for Iter<'r, 's> {
@@ -193,7 +189,8 @@ impl<'r, 's> Iterator for Iter<'r, 's> {
 
     fn next(&mut self) -> Option<Self::Item> {
         let next_tree = self.next.next();
-        let ret = next_tree.map(|parent_tree| Context::new(self.global_settings, parent_tree));
+        let ret =
+            next_tree.map(|parent_tree| Context::new(self.global_settings, parent_tree.clone()));
         ret
     }
 }